Unlimitedprojects.com
Closing
date: 3rd June, 2002
Tender
Document
for
Sodium
Sulphate Plant
50000 Tons
/ Year Capacity
Bidders are required to submit their offers based on well-proven and up to date process and technology. The information given in the technical part are guide liners and the bidder is required to give full details in his offer.
Based on the
foregoing description, the scope of work required to be covered in the bid,
shall be as follows:-
§ The contractor shall undertake to conduct field technical evolution in cooperation with end user personnel to evaluate the scope of work defined in the “ technical attachment”. The finding and conclusions shall be presented in comprehensive technical report, together with the offer.
§ The contractor to deliver to the site (C & F Site) the equipment, material and supplies described in the “ technical attachment”.
§ The contractor to provide field supervision as shall be proposed in the bid to match the progress of fieldwork (erection, testing, commissioning… etc). The fieldwork shall be carried out be end user directly or through sub contractors.
The contractor shall be responsible to supply all required erection and installation procedures.
§ The approval of end user shall be obtained for any and all engineering, procurement, expediting.. Etc under the contract. Procedure of this approval and details there of shall be agreed upon contract award.
§ The contractors is required to submit to end user complete documentation related to the agreed supplied and work such as (operating manual, maintenance manual, equipment manual, drawings.. in number of copies and procedure as shell be agreed upon contract award stage.
§ The contractor, should be point out in his bid, and exceptions and / or deviation from the specific requirement of this tender as regard the content of” technical attachment” and shall point out to end user attention any other requirements that are coessential. A comprehensive time schedule is expected to be submitted in the bid covering the contractor task under scope of work.
§ Spare parts are expected to be listed in general cauterizations, the contractor is required to include & indicate the price separately for the prices, as part of his of his supplies.
§ Certain number of man months shall be required to be including in the offer for training end user personal abroad the proposed equipment for their maintenance & operation in addition to process control.
3- GENERAL REQUIREMENTS
3-1- General
The end user intends to build a Sodium Sulphate plant based on natural deposit of Glaubcritc.
Terms
of payment of this tender by L/C, the quotation is required to be On lump sum
basis with detailed breakdown prices for the jobs required in
the scope of work to include technical studies and detailed design,
procurement, inspection, shipping and transport to Site, and supervision of
erection and field work up to commissioning and performance ice test Run with a
warranty
Period
for the equipment and of one year thereafter.
3-2-Basis for Bidding
Bidder’s shall
submit a proposal and quote a lump sum price for the works in itemized
breakdown. The successful bidder (Contractor) shall execute the work outlined in
these documents.
3-2-1- Studies,
Design, Supply and Supervision
The successful bidder shall perform field technical evaluation in collaboration with end user Personnel to complete the information required in addition to his offer and shall perform any required basic and detailed engineering, design, supply of material and equipment in addition to that detailed in the technical Attachment and Supervise the erection and field work as well as commissioning and performance testing which are all to be performed by the contractor end user personal.
The
engineering design shall be carried out and include as may be applicable and as
far as the scope of the contractor requires engineering flow sheet, plot plans,
piping and cabling drawings, general arrangement drawing, detailed engineering
specification, detailed construction drawstrings, operating and maintenance
manual and in general all engineering and information needed for the erection of
the plant. The Successful bidder shall be responsible for the supply, and expediting of
all material and equipment and arrange (or safe transportation of name to job
site and subsequent handing over to end user.
The erection and
related fieldwork shall be carried out by end user directly or through sub—contractors according to contactor
drawing and supervision.
The contractor
shall provide erection supervision and vendors servicemen as may be necessary
and to the minimum required, ensuring proper erection and subsequent
commissioning.
3-2-2- Commissioning
The
contractor shall be responsible for carrying out the commissioning and test of
the delivered plant and equipment using end user personnel.
Training for
operating and maintenance staff of end user
will be carried out by the contractor.
The details of such
requirements shall be discussed and elaborated at the award stage.
3-2-3- Maintenance
The
Contractor shall be responsible for guaranteeing the equipment amid works for a
period of one year after the completion of the works. This includes the
maintenance (apart from normal wear and tear and routine maintenance) of all
materials, equipment or work
Which proves faulty or inadequate through poor selection, design or improper erection instructions.
These costs shall also cover the Provision and all expenses of any specialist services required for special items of equipment or works.
3-2-4-Spare
Parts
Bidders are to include in their proposal spare part list as recommended in the manufacturers for two (2) years, operation, the cost of which should be included in time quotation and specified separately. This spare parts quotation could be either sum specified in the contract or fixed price according to a list to be fixed in the contract.
3-3-
Bidding Procedures
3-3-1- Preparation of Proposal:
Each proposal shall be made in three (3) copies for the complete work called for in the documents. Proposals shall be on lump sum itemized prices. All Copies shall be properly executed, all blank spaces in the offer shall be filled in, and interlineations, alterations or erasures shall be initialed and formally explained over time signature of the bidder. One copy of each submittal shall be marked original “. In the event of a discrepancy between the “ original “ and the other copies of the submittal, the information shown on the “ Original “ shall prevail.
The proposal shall be firm
for (180) calendar days after the date set for receipt
of proposal.
The proposals shall show the full legal name and business address of the bidder, and shall be signed with the usual signature of the person or persons authorized to bind the bidder and shall be dated. The power of attorney or similar satisfactory evidence of authority shall be included in the proposal.
3-3-2- Return of Proposal:
Proposal shall be returned either by registered post or handed in at the receiving office against receipts by the closing date shown on the covering letter at the latest, Proposal received after the closing date will not he considered.
3-3-3- Examination of
documents and inquiry:-
3-3-3-1-The bidder shall be deemed to have carefully considered, and have accepted and included in his proposal, all the provisions and requirements of this tender Documents unless specifically put otherwise in his proposal.
3-3-3-2- The bidder shall inform himself with respect to all conditions which might in any way affect the performance of the works or cost thereof. Failure to do so will be at sole risk of the bidder, and no relief shall be given for error or omission of the bidder.
3-3-3-3-Should time bidder find discrepancies in, or form these documents, or should the intent or meaning of any part of the documents appear to time bidder to be obscure or ambiguous, the bidder should at once contact end user for clarification or correction thereof before submitting his proposal.
3-3-3-4- Any additional information may be required by time bidder shall
be provided by end user.
3-3-4-
Site Inspection:-
It is advisable that the bidder would visit and inspect the site of sodium sulphate plant.
3-4- Proposal Requirements:-
3-4-1- Accompaniments to Proposal
Proposal shall include the following:-
a- Documents of Competency
b- Documents of Association
c- Technical proposal and such other documents as time bidder is requited to Submit with proposal. Unless otherwise stated, all documents shall be supplied in three (3) copies.
3-4-2- Documents of
Competency:
The bidder shall submit with his Tender a list of the works of a similar nature and magnitude to these now required which he has carried out, and stating in the case of each work, its nature, amount of contact sum, beneficiary and date of commencement and completion. Similar information shall be given in respect of each sub-contractor / Supplier which the bidder proposes to employ for the execution of portions of the works, and in respect of any firms associated or intended to be associated in a consortium.
3-4-3- Technical proposal requirements:
The technical proposal must be in accordance with the requirements and specifications included in these documents.
Major deviations from the requirements and specification may be submitted as alternative offer and will be considered.
The bidder must include in his technical proposal a full
description including drawings and calculations that may be necessary, of
proposed designs, construction methods and procedures, equipment, piping items
etc… for application in the final erection of the items of work included in the work.
§ Plot plans and elevations, indicating access ways, pipe racks, structures, buildings, drainage, (as applicable).
§ Detailed material balance for normal operation.
§ Process flow diagrams showing heat and material balances, flow temperatures, pressure, equipment duties and capacities.
§ Engineering flow diagrams giving details of instrumentations, valves, major line sizes, indicating any special material, its features and characteristics with special emphasis on selection.
§ Capacity yields and quality of all products.
§ Utility and chemical consumption.
§ Electrical, telecommunication and telecontrol single line diagrams.
§ Building sketches showing sizes amid types of construction.
§ Equipment list including data sheets amid sketches, performance curves, sectional drawings, etc.
§ List of bidders proposed sub-contractors.
§ List of bidders proposed suppliers.
§ A detailed work schedule covering the start and completion date for technical evaluation, design & engineering, supply of equipment and material, erection Supervision start it p & commissioning.
§ Estimated cost of spare parts for (24) months operation.
§ Cost break down for each component of scope of work.
4- TERMS OF PAYMENT:
4-1- Terms of payment by L/C.
4-2- Stages of Completion:
4-2-1- Certificate of Completion of delivery when supplies (equipment, documentation, spare parts are delivered and handed over to end user to allow Continuity of erection.
4-2-2- Ready of completion of certificate, when erection of the plant is complete and pre commissioning steps are achieved.
4-2-3- Test run certificate, when the plant has demonstrated it can fully meet guaranteed performance specifications.
4-2-4- Final Acceptance Certificate.
When the warranty and maintenance period is competed.
5- MISCELLANEOUS
CONDITIONS INSTRUCTION:-
5-1- Extension:
End user reserve the right without limitation there of to extend the time set for receipt of proposals. However, notice of such extension will be given to each bidder prior to the opening of proposals.
5-2-
Responsibility:
Approval by G1I&end user of Contractors proposed specifications and other engineering and materials etc. shall in no way relieve the Contractor of his sole eventual responsibility lot the works.
5-3- Language:
The Tender and all accompanying matter must be written in English language.
5-4- Variations
in Documents Prior to tender:
At any time prior to the date for the receipt of proposals, end user may issue addenda in writing to all firms concerned, deleting, Varying or extending any part of these documents. Any such addenda shall then become an integral part of’ time Tender documents and be treated as such by-bidders.
Except that it be in the formal manner described above, no representative, employee agent member or servant of end user has any authority to make representation or explanation to persons tendering as to the meaning of the conditions of Contract, specification, the drawing and other documents, or as to any thing to be done or no to be done by the successful bidder, for the works.
5-5- Documents
Confidential:
All recipients of the documents for the purpose of submitting a bid (whether they submit a bid or not) shall treat the details of the documents as private and confidential.
5-6- Ownership of Tender Documents:
All Tenders and accompanying documents and drawings submitted to end user shall be the property pf end user and will NOT be returned to the bidder after submission.
5-7- All
at the Bidders expense:
All costs and charges in Connection With Visits to and examination of the site, and in the preparation of the bid shall be borne by time bidder.
5-8- Lowest
or any Tender Need Not Be Accepted:
End user dose not binds itself to accept (lie lowest or any bid, amid will not assign a reason for rejection any bid.
5-9- Standardization
and common vender for similar type of equipment is required:
Such common venders are for all valves, all piping, all L.V. motors, all rock slurry and clarified water pumps, transmitters, controls ... etc.
Spare parts are required to be delivered and as part of the scope of’ supply of the contractor. Such spare parts are particularly required for pumps, fans, and valves ... etc and in general to all moving parts.
Typical lists of spare are required to be included for each category equipment, with the corresponding price for it.
6- RAW MATERIAL
The raw material is Glauberite (combined salt of Na2SO4 and CaSO4). The Na2SO4 Content in the Glauberite ranges from 26% up to 42% averaging about 30%. The Glauberite bearing deposit is composed of mud and silt together with Glauberite crystals and various other salts ( NaCl, MgSO4,). The Glauberite content in the deposit is about 30%.
The deposit is an accumulation of’ mud, silt and various salts in a depression, and the thickness of the Glauberite bearing part of the deposit ranges from few centimeters at periphery of the depression to 4m at the center the Glauberite bearing part is confined to the top of the deposit. The whole deposit is water logged and logged and the bearing capacity of the top is almost zero. During rainy season in winter and spring, rainwater may accumulate up to a depth of 80cm on top the deposit, which dries off during summer.
At present an area of about of about one square Kilometer have been isolated by building three dikes at right angles to each other. These dikes isolate this area from the rest of the depression to reduce water accumulation during rainy season and to provide access for mining operation. The present mining method is to extract the Glauberite bearing part of the deposit (the top ) by hydraulic excavator and load it on dump trucks which transport it to the plant utilizing the dikes for access. After excavation of the Glaubcrite bearing part of the deposit, the empty space is refilled with dry soil to make it possible. For the excavation and dump trucks to advance moving on the dry refill.
Other mining methods may be proposed, like hydraulic dredging, or utilizing floating hydraulic excavators or any other alternative that the bidder may feel lit, taking into consideration mining cost and ease of’ operation.
It may be useful to mention that when material is extracted the empty space remains full of water due to the water present in the deposit.
7- PROCESSING
At present a small processing unit have been installed and the
following information may be outlined
as an indication, but the bidder is required to verify by his own
means expertise.
7.1.
SERRATION OF GLAUBERITE
The following procedure
have been applied:
§ The mud, silt and glauberite mixture is mixed with water at radio of 5 to 1 (5 water to 1 mud).
§ The mixture is agitated to achieve scrubbing amid mud amid silt disintegration.
§ Then size separation at 0.6mm in order to separate the Glaubertite (0.6mm fraction).
§ The plus 0.6mm product is stockpiled for future use, and minus 0.6 0.6mm together with the water is discharged in a settling pond in order to make it possible to recycle lime water. Almost all -soluble salts are removed with minus 0.6tmmin fraction.
7.2. SODIUM SULPHATE EXTRACTION FROM GLAUBERITE:
The sodium sulphate is separated from the calcium sulphate by dissolution in water:
§ The Glauberite is mixed with water at a temperature not less then 20ºC. The water to Glauberire ratio is 3 to 1. It is to be noted that size reduction of Glauberite improves time required and recovery.
§ The mixture is vigorously agitated for a period not less than 30 minuets.
§ When the brine solution reaches a density of 17ºB the mixture is discharged in a settling tank in order to separate the calcium . Other alternative of separating the calcium sulphate such as centrifuge or filter could be utilized.
§ The sodium sulfate solution is filtered to remove any remaining solids.
7.3. EXTRACTION
OF SOLID SODIUM SULPHATE
This extraction is achieved in two stages.
§ Stage one -the extraction of Na2SO4. 10 H2O by cooling the sodium rich solution using appropriate cooling system and appropriate crystallize. The Na2 SO4. 10 H2O crystals are then removed by centrifuging centrifuging or filtration.
§ Stage two – the extraction of anhydrous Na2SO4 by removing the water of crystallization by evaporation under vacuum. The Na2SO4 crystals are removed by centrifuging or filtration and dried.
7.4- STORAGE AND PACKING
Suitable bulk storage should be included and bag illuming station to package all products in addition to bagged material storage.
7.5.
CAPACITY AND SPECIFICATION
The plant capacity should be 50000 Tons per year of sodium sulphate.
The sodium sulphate should have a purity of 99.9 % Na2SO4 as a minimum, free flowing with grain size 100% passing 0.7mm.
Bidder should specify full specification of product.
8. SCOPE
8.1 The bidder is responsible for full detailed design of time plant including utilities. The design should cover general layout, detailed civil works design including building and foundation, Full equipment design up to fabrication drawing full process design including material balance, P & / DS, plan, piping and cabling drawing, electrical single line diagram ..etc.
8.2 The bidder is responsible for the supply of all equipment and material necessary for the plant. The bid could take into consideration the consideration the possibilities of fabrication in site of certain items such as vessels, hoppers, chutes and similar items. The fabrication could be made according to fabrication drawing prepared by the contractor using raw material supplier by the contractor.
8.3 The bid should cover the supply of necessary mining equipment. The prices for these equipment should be specified separately.
8.4 The civil construction will be carried out by end user according to time design by the contractor.
8.5- Erection of equipment will be carried out by end user according to the design and instruction supplied by the contractor under contractor’s supervision.
8.6- The contractor should commission the plate using manpower supplied end user. The contractor should undertake to train end user personal during commissioning.
8.7- The contractor is responsible for achieving
successful test run proving capacity and quality.
For further details please contact:
Email: vpcs@unlimitedprojects.com
Vinayak Project Consultants
2nd Floor, Gangwal Bhawan,
Mahavir Marg, M.I.Road,
Jaipur-302001