CN212655488U - System for ammonia-soda process preparation crude salt water - Google Patents
System for ammonia-soda process preparation crude salt water Download PDFInfo
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- CN212655488U CN212655488U CN202021976724.7U CN202021976724U CN212655488U CN 212655488 U CN212655488 U CN 212655488U CN 202021976724 U CN202021976724 U CN 202021976724U CN 212655488 U CN212655488 U CN 212655488U
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Abstract
The utility model provides a system for ammonia-soda process preparation crude salt water, includes salt dissolving bucket, calcium salt cask and recovery pond, and the water inlet of recovery pond is passed through the baffling groove and is connected with the calcium salt cask, and the delivery port of recovery pond is connected with the salt dissolving bucket through going out the liquid pipeline, is connected with the filter-pressing water pipeline on the baffling groove, is connected with calcium salt water pipeline on the calcium salt cask, connects the brine pipeline on the recovery pond, is equipped with the tubing pump on the filter-pressing water pipeline, is equipped with the recovery pump that meets with going. The utility model discloses separately filter-pressing return water and brine, reduce two kinds of salt solution contact reaction formation calcium carbonate etc. and deposit in the salt solution storage tank to reduce salt solution pump and pipeline scab problem. Adopt the system, the salt dissolving water pipeline that has significantly reduced and the salt dissolving water pump condition of scarring has also avoided scarring in the salt dissolving bucket, has reduced the construction risk of ascending a height of clearance salt bucket, has guaranteed that the salt dissolving bucket cleans the progress.
Description
Technical Field
The utility model relates to a preparation method of crude brine, in particular to a system for preparing crude brine by an ammonia-soda process.
Background
There are four types of salt water in salt water workshop: high-concentration brine from Huaian, filter-pressing backwater separated by a brine centrifuge, calcium brine sent from a calcium production workshop and hot production water enter a brine dissolving storage tank (phi 7500X 6000, effective volume 265 m) from the top, are pumped to a brine dissolving barrel (phi 4600X 8162, effective volume 120 cubic; 3 division 1 preparation) through a brine dissolving pump to be in countercurrent contact with raw salt sent by a belt, and crude brine with qualified concentration is prepared to a refining process for removing impurities and calcium and magnesium and then is sent to a heavy alkali workshop for use.
At present, the common ammonia-soda process for preparing crude brine comprises the steps of enabling filter-pressing backwater and brine to completely enter a salt dissolving water storage tank, mixing, and pumping the mixed salt solution to a salt dissolving barrel. After three to four months of operation: the impeller of the saline pump and the saline pipeline can scab (seriously), the diameter of the original saline pipeline is DN350 pipeline, the scab thickness can reach 5-8 cm, and the conveying capacity is seriously reduced. The most severe scarring is in the impeller and the lines near the pump outlet, as well as the pneumatic regulating valve at 10 meters from the pump outlet. But as saline line distances increase, scarring becomes more and more light. Because the production of the saline water pipeline can not be stopped, two pipelines are kept, when the flow is insufficient, the pipelines are replaced in time, and the old pipeline is replaced (the scab is very serious and hard, and the cleaning is difficult).
After calcium salt water (the concentration of calcium ions is greatly changed) in a calcium preparation workshop is introduced into the salt water storage tank, the scabbing speed is doubled, and the impeller, the auxiliary impeller and the rear end cover of the pump are all scabbed within two months, so that the upper amount of the pump is insufficient; and friction exists between the auxiliary impeller and the rear end cover of the pump, so that the pump body is heated, the production and operation are seriously threatened, the pump is stopped for pickling after one month of operation, and the production efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to the not enough of prior art, provide a system that can improve the recycle ratio of calcium salt solution, reduce the ammonia-soda process preparation crude salt solution of consumption.
The utility model aims to solve the technical problem that the technical scheme realizes through following, the utility model relates to a system for ammonia-soda process preparation crude salt water, its characteristics are, this system is including changing the salt bucket, calcium salt cask and recovery pond, the water inlet of recovery pond passes through the baffling groove and is connected with the calcium salt cask, the delivery port of recovery pond is connected with the salt bucket through going out the liquid pipeline, be connected with the filter-pressing water pipeling that is used for carrying the filter-pressing return water on the baffling groove, be connected with the calcium salt pipeling that is used for carrying the calcium salt water on the calcium salt cask, be connected with the brine pipeline that is used for carrying brine on the recovery pond, the last tubing pump that is equipped with of filter-pressing water.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, all be equipped with the flow control valve who is used for adjusting calcium salt solution or filter-pressing return water flow on the pipeline between baffling groove and the calcium salt cask and on the filter-pressing water pipeling.
The technical problem to be solved by the utility model can be realized by the following technical scheme, the water inlet of the salt melting barrel is provided with a control valve.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme the delivery port department of recovery pond is equipped with the check valve.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme be equipped with the liquid level controller of control recovery pump work in the recovery pond.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, it is equipped with two at least to change the salt bucket, goes out the liquid pipeline and comprises house steward and the branch pipe that meets with changing the salt bucket, all is equipped with the valve on the income water end of house steward and each branch pipe.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme be connected with the auxiliary line who links to each other with each salt bucket on the filter-pressing water pipeling, be equipped with the control valve on the auxiliary line.
The technical problem to be solved by the utility model is realized by the following technical proposal, the utility model is a method for preparing crude brine by ammonia-soda process, which is characterized in that the method uses the system and adopts the following concrete steps,
(1) sending the filter pressing backwater into a recovery tank from a filter pressing water pipeline through a baffle groove;
(2) calcium salt water sent from a calcium production workshop is sent into a calcium salt water bucket from a calcium salt water pipeline and then is sent into a diversion tank discontinuously, and is fully mixed with the filter-pressing backwater input in the step (1), and then is sent into a recovery tank after full mixing reaction,
(3) directly feeding brine into a recovery tank from a brine pipeline, fully mixing the brine with the liquid obtained after the mixing reaction in the step (2), and uniformly reacting to obtain clear liquid;
(4) and sending the clear liquid after reaction into a salt dissolving barrel to prepare crude salt water with qualified concentration.
Compared with the prior art, the utility model discloses separately filter-pressing return water and brine, reduce two kinds of salt solution contact reaction and generate deposits such as calcium carbonate, reduce the scar of salt solution pump and pipeline for the scar problem obtains solving or alleviates by a wide margin. Adopt the system, the salt dissolving water pipeline that has significantly reduced and the salt dissolving water pump condition of scarring has also avoided scarring in the salt dissolving bucket, has reduced the construction risk of ascending a height of clearance salt bucket, has guaranteed that the salt dissolving bucket cleans the progress.
Drawings
FIG. 1 is a system block diagram of a system for preparing crude brine by an ammonia-soda process according to the present invention.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings, so as to enable those skilled in the art to further understand the present invention, without constituting a limitation to the right of the present invention.
Referring to fig. 1, a system for preparing crude brine by ammonia-soda process, the system includes salt dissolving bucket 11, calcium salt bucket 5 and recovery pond 7, the water inlet of recovery pond 7 passes through baffling groove 8 and is connected with calcium salt bucket 5, the delivery port of recovery pond 7 is connected with salt dissolving bucket 11 through going out the liquid pipeline, be connected with the filter-pressing water pipeling 3 that is used for carrying the filter-pressing backwater on the baffling groove 8, be connected with calcium salt water pipeling 3 that is used for carrying the calcium salt water on the calcium salt bucket 5, be connected with bittern pipeling 1 that is used for carrying brine on the recovery pond 7, the last tubing pump that is equipped with of filter-pressing water pipeling 3, be equipped with the recycle pump.
And flow regulating valves 6 for regulating the flow of the calcium salt water or the filter pressing backwater are arranged on the pipeline between the diversion groove 8 and the calcium salt water bucket 5 and on the filter pressing water pipeline 3.
A control valve 10 is arranged at the water inlet of the salt dissolving barrel 11.
A check valve is arranged at the water outlet of the recovery tank 7.
And a liquid level controller for controlling the recovery pump to work is arranged in the recovery tank 7.
The salt dissolving barrel 11 is provided with at least two, taking three as an example, the liquid outlet pipeline consists of a main pipe and branch pipes connected with the salt dissolving barrel, and valves are arranged at the water inlet end of the main pipe and on each branch pipe.
The filter pressing water pipeline 3 is connected with auxiliary pipelines 12 connected with various salt melting barrels, and the auxiliary pipelines 12 are provided with control valves.
A method for preparing crude brine by an ammonia-soda process comprises the following specific steps,
(1) the filter-pressing backwater is sent into a recovery tank from a filter-pressing water pipeline through a baffling groove, the filter-pressing backwater is separated from the brine, and the precipitation of calcium carbonate and the like generated by the contact reaction of two types of salt water in a salt water storage tank is reduced, so that the scaling problem of a salt water pump and a pipeline is reduced or greatly reduced;
(2) calcium salt water delivered from a calcium preparation workshop is delivered into a calcium salt water bucket from a calcium salt water pipeline and then delivered into a diversion tank, is fully mixed with the filter-pressing backwater input in the step (1), is delivered into a recovery tank after the fully mixed reaction, and has the flow rate of the filter-pressing backwater in the diversion tank: the flow ratio of the calcium salt water is 15-25: 1,
(3) directly feeding brine into a recovery tank from a brine pipeline, fully mixing the brine with the liquid mixed and reacted in the step (2), uniformly reacting to obtain clear liquid, fully removing calcium ions in calcium salt water due to excessive filter-pressing backwater, fully reacting the excessive filter-pressing backwater with the steam-transportation brine in the recovery tank (the reaction can be kept for four hours), and completely removing carbonate ions (CO 32-) and hydroxyl ions (OH-);
(4) clear liquid after full reaction enters three salt melting barrels through a recovery pump (which can be automatically started and stopped according to the liquid level of a recovery tank, and a check valve is arranged at an outlet to prevent water from flowing back when the pump is stopped), so that crude salt water with qualified concentration is prepared, and finally, the crude salt water with qualified concentration is sent to a refining process for impurity removal and calcium and magnesium removal and then sent to a heavy alkali workshop for use.
Example 1, a process for the preparation of crude brine by the ammonia-soda process, comprising the following specific steps,
(1) sending the filter pressing backwater into a recovery tank from a filter pressing water pipeline through a baffle groove, wherein the flow of the filter pressing water pipeline is 60-100m3H, the lift is 28 m;
(2) calcium salt water fed from a calcium making workshop is intermittently fed into a calcium salt water bucket from a calcium salt water pipeline, calcium salt water in the calcium salt water bucket is supplemented in time to avoid empty buckets, then the calcium salt water is fed into a diversion groove at the flow rate of 5.5 cubic meters per hour, the diversion groove can be also intermittently conveyed at the position to ensure the continuous reaction of liquid in the diversion groove, the calcium salt water and the filter-pressing return water are fully mixed and fed into a recovery tank after the full mixing reaction,
(3) directly feeding brine into a recovery tank from a brine pipeline at the flow rate of 500 cubic meters per hour, fully mixing the brine with the liquid obtained after the mixing reaction in the step (2), and obtaining clear liquid after uniform reaction;
(4) and (3) enabling the clear liquid after full reaction to enter three salt melting barrels through a recovery pump so as to prepare crude salt water with qualified concentration, and finally enabling the crude salt water with qualified concentration to be subjected to a refining process for impurity removal and calcium and magnesium removal and then to be sent to a heavy alkali workshop for use.
The utility model discloses a recovery pond be open-air pond, even if form calcium carbonate and calcium sulfate deposit also relatively easy clearance in the pond, according to work load, directly transport the slag yard alright with waste mud together after clearing up with the excavator or artifical clearance when the clearance salt bucket.
In addition, filter-pressing backwater can also be directly sent into three salt melting tanks by pipeline pumps, and the inlet of the salt melting tank is controlled by a Dg100 valve (when no calcium salt water exists, the salt melting tank can be directly evolved).
Adopt the system, beneficial effect as follows has:
(1) the recovery capacity of the recovery pond is increased, the recovery pond is used for receiving the steam-transported brine, the receiving and discharging capacity is increased by 2000 cubic meters every day, and the cost can be reduced by 120 ten thousand yuan/month compared with the use of the raw salt (the price of the brine is about 50 yuan/cubic meter, 3.3 cubic meters are reduced by one ton of the raw salt, the price of the raw salt is 200 yuan/ton, and the cost is saved by 20 yuan per cubic meter). The recovery pump realizes the self-starting and self-stopping functions of the recovery pump according to the liquid level, thereby greatly reducing the labor intensity of workers;
(2) calcium salt water can be normally recycled, 4.3 ten thousand of calcium salt water is accepted every year, 7582 tons of original salt are converted (the annual cost is 20 ten thousand for transporting by a dump truck before transformation), the transportation risk is greatly reduced, the environment pollution caused by transportation and splashing (the distance between a calcium manufacturing workshop and the salt water is 1 kilometer) is reduced, and meanwhile, the recycling of byproducts in the calcium manufacturing workshop is realized, and a circular economic route is taken;
(3) the scabs of the salt dissolving water pipeline and the salt dissolving water pump are greatly reduced, one pipeline (260 meters) does not need to be replaced one year, and the material and construction cost is saved by 20 ten thousand yuan;
(4) the scab in the salt dissolving barrel is avoided, the ascending construction risk of the cleaning salt dissolving barrel is reduced, the cleaning progress of the salt dissolving barrel is ensured, and the labor cost can be saved by 0.5 yuan/year.
The above embodiments are only used to clearly illustrate the technical solutions of the present invention, and the protection scope of the present invention includes but is not limited to the above embodiments, and any suitable changes or substitutions made by those skilled in the art according to the claims of the present invention and any shown technical fields should fall within the patent protection scope of the present invention.
Claims (8)
1. A system for preparing crude brine by an ammonia-soda process is characterized in that: the system comprises a salt dissolving barrel, a calcium salt water barrel and a recycling tank, wherein a water inlet of the recycling tank is connected with the calcium salt water barrel through a diversion groove, a water outlet of the recycling tank is connected with the salt dissolving barrel through a liquid outlet pipeline, the diversion groove is connected with a filter-pressing water pipeline used for conveying filter-pressing backwater, the calcium salt water barrel is connected with the calcium salt water pipeline used for conveying calcium salt water, the recycling tank is connected with a brine pipeline used for conveying brine, a pipeline pump is arranged on the filter-pressing water pipeline, and a recycling pump connected with the liquid outlet pipeline is arranged in the recycling tank.
2. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: and flow regulating valves for regulating the flow of the calcium salt water or the filter pressing return water are arranged on the pipeline between the diversion groove and the calcium salt water bucket and on the filter pressing water pipeline.
3. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: and a control valve is arranged at the water inlet of the salt dissolving barrel.
4. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: and a check valve is arranged at the water outlet of the recovery tank.
5. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: and a liquid level controller for controlling the recovery pump to work is arranged in the recovery tank.
6. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: the salt dissolving barrel is at least provided with two salt dissolving barrels, the liquid outlet pipeline consists of a main pipe and branch pipes connected with the salt dissolving barrel, and valves are arranged at the water inlet end of the main pipe and on each branch pipe.
7. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: and the filter pressing water pipeline is connected with auxiliary pipelines connected with the salt melting barrels, and the auxiliary pipelines are provided with control valves.
8. The system for preparing crude brine by ammonia-soda process according to claim 1, wherein: the recovery pond is an open-air pond.
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| CN202021976724.7U CN212655488U (en) | 2020-09-11 | 2020-09-11 | System for ammonia-soda process preparation crude salt water |
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| CN202021976724.7U CN212655488U (en) | 2020-09-11 | 2020-09-11 | System for ammonia-soda process preparation crude salt water |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111847482A (en) * | 2020-09-11 | 2020-10-30 | 连云港碱业有限公司 | System and method for preparing crude brine by ammonia-soda process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111847482A (en) * | 2020-09-11 | 2020-10-30 | 连云港碱业有限公司 | System and method for preparing crude brine by ammonia-soda process |
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