CN211141540U - Crystallization reverse material flow device in combined soda process soda ash production process - Google Patents
Crystallization reverse material flow device in combined soda process soda ash production process Download PDFInfo
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- CN211141540U CN211141540U CN201922065767.3U CN201922065767U CN211141540U CN 211141540 U CN211141540 U CN 211141540U CN 201922065767 U CN201922065767 U CN 201922065767U CN 211141540 U CN211141540 U CN 211141540U
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Abstract
A crystallization reverse material flow device in the production process of soda by a combined alkali method comprises a salting-out crystallizer, a cold-out crystallizer and a pre-cooling out crystallizer, wherein the cold-out crystallizer is connected with a cold-out external cooler for circularly cooling, a heat inlet of the cold-out external cooler is communicated with the cold-out crystallizer through a cold-out feeding pipeline, and a heat outlet of the cold-out external cooler is communicated with the cold-out crystallizer through a cold-out returning pipeline; the precooling crystallizer is connected with a precooling crystallizer external cooler for circulating cooling, the heat inlet of the precooling crystallizer external cooler is communicated with the precooling crystallizer through a precooling feeding pipeline, and the heat outlet of the precooling crystallizer external cooler is communicated with the precooling crystallizer through a precooling returning pipeline; the salting-out crystallizer is communicated with a cold separation feeding pipeline and a cold separation feeding pipeline through a submerged pump. The device can greatly reduce the labor intensity of operators, improve and stabilize the cooling operation of the external cooler, save energy consumption, virtually increase the number of the external coolers in the operation, increase the heat exchange area of the external cooler and optimize the prior device.
Description
Technical Field
The utility model relates to a unite alkali method soda production technical field, especially a crystallization contrary material flow device in unite alkali method soda production process.
Background
Taking out the crystal slurry of the salting-out crystallizer into a salting-out thickener, taking out the crystal slurry of the salting-out thickener, conveying the crystal slurry into the pre-cooling crystallizer and the cold-precipitation crystallizer through a reverse charge pump, and not directly entering the pre-cooling crystallizer and the cold-precipitation crystallizer to serve as external coolers. The hot AI cleaning of the pre-cooling and separating external cooler and the cold separating external cooler adopts a hot AI cleaning pump, the hot AI after ammonia absorption returns to the hot AI barrel firstly, then the hot AI is conveyed to the cleaning external cooler by the hot AI cleaning pump, and the cleaned hot AI returns to the hot AI barrel.
However, this process has the following drawbacks:
1. the salting-out reverse material does not directly enter the pre-cooling crystallizer and the external cooler of which the external cooler AI mother liquor is cooled to reach an oversaturated state and then is crystallized and separated out, so that the heat exchange tube of the external cooler is scabbed and blocked, the operation period of the external cooler is short (the external cooler needs to be changed for cleaning after 8 hours in the traditional process), the stable operation of the external cooler is not facilitated, and the labor load of operators is increased;
2. the traditional material reversing process has more devices, the material reversing pipeline is long and easy to block, the environment-friendly problem caused by the treatment of the material reversing pipeline is solved, and the labor load of operators is increased;
3. the traditional hot AI cleaning process flow needs to start a hot AI cleaning pump, increases energy consumption, brings noise and environmental protection problems, and increases the labor load of operators.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art not enough, provide one kind can reduce operating personnel intensity of labour, improve and stabilize the operation of external cooler cooling to practice thrift the energy consumption, solve the antithetical couplet alkaline process soda production in-process crystallization material reversing flow device of traditional technology safety environmental protection problem.
The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to a crystallization reversed-material flow device in the production process of soda by a combined alkali method, which comprises a salting-out crystallizer, a cold-separating crystallizer and a pre-cooling separating crystallizer, wherein the cold-separating crystallizer is connected with a cold-separating external cooler for circulating cooling, the hot inlet of the cold-separating external cooler is communicated with the cold-separating crystallizer through a cold-separating feed pipeline, and the hot outlet of the cold-separating external cooler is communicated with the cold-separating crystallizer through a cold-separating return pipeline; the precooling crystallizer is connected with a precooling crystallizer external cooler for circulating cooling, the heat inlet of the precooling crystallizer external cooler is communicated with the precooling crystallizer through a precooling feeding pipeline, and the heat outlet of the precooling crystallizer external cooler is communicated with the precooling crystallizer through a precooling returning pipeline; the salting-out crystallizer is communicated with a cold separation feeding pipeline and a cold separation feeding pipeline through a submerged pump.
The technical problem to be solved by the utility model can be further realized by the following technical scheme, for the crystallization retrograde flow process device in the combined soda process soda production process, the cold separating feed pipe and the pre-cooling separating feed pipe are all communicated with the external hot AI mother liquor pipeline, the first cleaning valve is installed at the communication position of the cold separating feed pipe, the pre-cooling separating feed pipe and the external hot AI mother liquor pipeline, the cold separating return pipe and the pre-cooling separating return pipe are evenly communicated with the external backheating AI mother liquor barrel, and the second cleaning valve is installed at the communication position of the cold separating return pipe, the pre-cooling separating return pipe and the external backheating AI mother liquor barrel; the height of the external hot AI mother liquor pipeline is higher than that of the cold separation external cooler and the pre-cooling separation external cooler, and the heights of the cold separation external cooler and the pre-cooling separation external cooler are higher than that of the external backheating AI mother liquor barrel; the AI mother liquor refers to the ammonia I mother liquor.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above allies oneself with alkali method soda production in-process crystallization contrary material flow device, the cold import and the cold export of cold separating out the external cooler all communicate with the refrigerated water pipeline of outside lithium bromide system.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above allies oneself with alkaline process soda production in-process crystallization retrograde flow device, the precooling is analysed the cold import of external cooler and is separated out the cold mother II liquid pipeline intercommunication of crystallizer with the outside, and the precooling is analysed the cold export and the outside mother II liquid bucket intercommunication of external cooler.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above allies oneself with alkaline process soda production in-process crystallization contrary material flow device, install on the precooling crystallizer and analyse the overflow pipe with the precooling of cold-out crystallizer intercommunication, the intercommunication has the overflow pipe with salting out the crystallizer intercommunication on the cold-out crystallizer, still installs the overflow pipe with precooling out the cold ware intercommunication on the salting out crystallizer.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above allies oneself with alkali method soda production in-process crystallization contrary material flow device, the cold AI mother liquor pipeline intercommunication that crystallizer and outside mother traded the system is analysed to the precooling.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above allies oneself with alkaline process soda production in-process crystallization contrary material flow device, the magma of crystallizer is taken out to the precooling and mouthful feeds through with outside cold analysis stiff ware, and the magma of crystallizer is taken out to the precooling and mouthful feeds through with cold analysis crystallizer.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, to above allies oneself with alkaline process soda production in-process crystallization contrary material flow device, install a plurality of and the submerged pump of cold separating feed pipeline intercommunication and a plurality of and the submerged pump of cold separating feed pipeline intercommunication in the crystallizer of salting out.
Compared with the prior art, the utility model provides a crystallization retrograde flow new installation, new method in the soda production process of united alkali method, will unite soda production process in crystallization retrograde flow and innovate the adjustment, its key technology is directly to utilize the submerged pump to take out the crystallizer retrograde flow of salting out at the crystallizer top of salting out, and directly take out the crystallizer retrograde flow of salting out to precooling and analyse the crystallizer and cold and analyse in the crystallizer operation external cooler, make external cooler operation cycle prolong to more than 24 hours, can realize even that external cooler continuous operation need not change the car; meanwhile, a traditional process hot AI cleaning pump is cancelled, the hot AI after ammonia absorption directly flows into the cleaning external cooler by utilizing the height difference, and the cleaned hot AI returns to the hot AI barrel by utilizing the height difference, so that the energy consumption is saved, and the noise and environmental protection problems are solved. The device can greatly reduce the labor intensity of operators, improve and stabilize the cooling operation of the external cooler, save energy consumption, solve the problems of safety, environmental protection and the like of the traditional process, and increase the number of the external coolers in operation virtually, increase the heat exchange area of the external cooler, and optimize the existing device.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a crystallization reverse-material flow device in the production process of soda by a combined alkali method comprises a salting-out crystallizer 3, a cold-out crystallizer 2 and a pre-cooling out crystallizer 1, wherein the cold-out crystallizer 2 is connected with a cold-out external cooler 6 for circularly cooling, a hot inlet of the cold-out external cooler 6 is communicated with the cold-out crystallizer 2 through a cold-out feeding pipeline, a hot outlet of the cold-out external cooler 6 is communicated with the cold-out crystallizer 2 through a cold-out returning pipeline, and the cold-out crystallizer 2 is provided with a cold-out axial-flow pump 5 matched with the cold-out feeding pipeline and used for outputting crystal slurry in the cold-out crystallizer 2 to the cold-out feeding pipeline; the cold separation feed back pipeline can be also communicated with a cold separation collecting tank 9 for playing a role of buffering; the precooling crystallizer 1 is connected with a precooling crystallizer external cooler 8 for circular cooling, a heat inlet of the precooling crystallizer external cooler 8 is communicated with the precooling crystallizer 1 through a precooling feeding pipeline, a heat outlet of the precooling crystallizer external cooler 8 is communicated with the precooling crystallizer 1 through a precooling feeding pipeline, and a precooling axial-flow pump 7 matched with the precooling feeding pipeline is arranged on the precooling crystallizer 1 and used for outputting crystal slurry in the precooling crystallizer 1 to the precooling feeding pipeline; the precooling separation and collection tank 10 can be communicated with the precooling separation and return pipeline and is used for playing a role of buffering; the salting-out crystallizer 3 is communicated with a cold separation feeding pipeline and a pre-cooling separation feeding pipeline through a submerged pump 4 and is used for pumping the crystal mush reverse material in the salting-out crystallizer 3 into the cold separation external cooler 6 and the pre-cooling separation external cooler 8, so that the AI mother liquor cooled by the cold separation external cooler 6 and the pre-cooling separation external cooler 8 still does not reach a supersaturated state, and the blockage of the cold separation external cooler 6 and the pre-cooling separation external cooler 8 is avoided; the submerged pump 4 is fixedly installed on the top of the salting-out crystallizer 3.
The cold separation feed pipeline and the pre-cooling separation feed pipeline are both communicated with an external hot AI mother liquor pipeline, first cleaning valves 12 are respectively arranged at the communication positions of the cold separation feed pipeline, the pre-cooling separation feed pipeline and the external hot AI mother liquor pipeline, the cold separation return pipeline and the pre-cooling separation return pipeline are uniformly communicated with an external backheating AI mother liquor barrel, and second cleaning valves 11 are respectively arranged at the communication positions of the cold separation return pipeline, the pre-cooling separation return pipeline and the external backheating AI mother liquor barrel; the height of the external hot AI mother liquor pipeline is higher than that of the cold separation external cooler 6 and the pre-cooling separation external cooler 8, so that a height difference is convenient to form, and the hot AI mother liquor in the external hot AI mother liquor pipeline automatically enters a cold separation feeding pipeline and a pre-cooling separation feeding pipeline under the action of gravity, then enters the cold separation external cooler 6 and the pre-cooling separation external cooler 8, and the cold separation external cooler 6 and the pre-cooling separation external cooler 8 are cleaned; the heights of the cold separating external cooler 6 and the cold separating external cooler 8 are higher than that of the external backheating AI mother liquid barrel, so that a height difference is convenient to form, hot AI mother liquid entering the cold separating external cooler 6 and the cold separating external cooler 8 automatically flows out, and the hot AI mother liquid is stored in the external backheating AI mother liquid barrel in a centralized mode.
The cold import and the cold export of cold outer cooler 6 of separating all communicate with the refrigerated water pipeline of outside lithium bromide system for the refrigerated water of the refrigerated water pipeline of outside lithium bromide system flows through cold outer cooler 6 of separating, thereby can utilize the refrigerated water of the refrigerated water pipeline of outside lithium bromide system to carry out the heat exchange to the mother liquor that flows through cold outer cooler 6 of separating, realize the cooling of mother liquor.
The cold inlet of the external precooling and salting-out cooler 8 is communicated with a cold mother liquid II pipeline of the external salting-out crystallizer 3, and the cold outlet of the external precooling and salting-out cooler 8 is communicated with an external mother liquid II barrel, so that the cold mother liquid II of the cold mother liquid pipeline of the external salting-out crystallizer 3 flows through the external salting-out cooler 8, and the cold mother liquid II of the cold mother liquid pipeline of the external salting-out crystallizer 3 can be utilized to exchange heat with the mother liquid flowing through the external salting-out cooler 8, thereby realizing the cooling and cooling of the mother liquid.
The pre-cooling crystallizer 1 is provided with a pre-cooling analysis overflow pipe communicated with the pre-cooling crystallizer 2, so that clear liquid in the pre-cooling crystallizer 1 can overflow into the pre-cooling crystallizer 2 conveniently, the pre-cooling crystallizer 2 is communicated with an overflow pipe communicated with the salting-out crystallizer 3, so that the clear liquid in the pre-cooling crystallizer 2 can overflow into the salting-out crystallizer 3 conveniently, the salting-out crystallizer 3 is also provided with an overflow pipe communicated with the pre-cooling analysis external cooler 8, so that the clear liquid in the salting-out crystallizer 3 can overflow into the pre-cooling analysis external cooler 8 conveniently, and after heat exchange, an external mother liquid II barrel is returned.
The precooling crystallizer 1 is communicated with a cold AI mother liquor pipeline of an external mother exchange system and is used for feeding, and input cold AI mother liquor firstly enters the precooling crystallizer 1, then enters the precooling crystallizer 2 and the salting crystallizer 3, then enters the precooling external cooler 8, exchanges heat through the precooling external cooler 8 and then is output to an external mother liquor II bucket.
The crystal slurry taking-out port of the cold separation crystallizer 2 is communicated with an external cold separation thickener and is used for discharging, and the crystal slurry in the cold separation crystallizer 2 is output through the crystal slurry taking-out port and then is sent into the external cold separation thickener for continuous treatment; the crystal slurry taking-out port of the pre-cooling crystallizer 1 is communicated with the cooling crystallizer 2 and is output by the crystal slurry taking-out port of the cooling crystallizer 2.
A plurality of submerged pumps 4 communicated with cold separation feed pipelines and a plurality of submerged pumps 4 communicated with the cold separation feed pipelines are arranged in the salting-out crystallizer 3, so that the cold separation feed pipeline of each cold separation external cooler 6 corresponds to one submerged pump 4, the feeding of each cold separation external cooler 6 is uniform, and the cold separation external cooler 6 is convenient to change vehicles; and ensuring that the pre-cooling analysis feed pipeline of each pre-cooling analysis external cooler 8 corresponds to one submerged pump 4 so as to ensure that each pre-cooling analysis external cooler 8 can feed uniformly, and switching by using the pre-cooling analysis external cooler 8.
A crystallization reverse material flow method in the production process of soda by a combined soda process comprises the following steps:
(1) when the cold-separation crystallizer is used, the external mother exchange system inputs cold AI liquid into the pre-cooling separation crystallizer 1, clear liquid in the pre-cooling separation crystallizer 1 overflows to the cold-separation crystallizer 2, clear liquid in the cold-separation crystallizer 2 overflows to the salting-out crystallizer 3, the cold-separation external cooler 6 circularly cools mother liquid in the cold-separation crystallizer 2, the pre-cooling separation external cooler 8 circularly cools the mother liquid in the pre-cooling separation crystallizer 1, meanwhile, the submerged pump 4 inputs crystal slurry in the salting-out crystallizer 3 into the cold-separation external cooler 6 and the pre-cooling separation external cooler 8, the mother liquid cooled by the cold-separation external cooler 6 is input into the cold-separation crystallizer 2, and the mother liquid cooled by the pre-cooling separation external cooler 8 is input into the pre-cooling separation crystallizer 1; finally, taking out the crystal slurry precipitated from the pre-cooling crystallizer 1 to a cold crystallizer 2, and taking out the crystal slurry precipitated from the cold crystallizer 2 to an external cold-precipitation thickener;
(2) during cleaning, the first cleaning valve 12 and the second cleaning valve 11 are opened, hot AI mother liquor in the external hot AI mother liquor pipeline directly flows into the cold separation external cooler 6 and the pre-cooling separation external cooler 8 by utilizing the height difference to clean the cold separation external cooler 6 and the pre-cooling separation external cooler 8, and the cleaned hot AI mother liquor returns to the hot AI mother liquor barrel under the action of the height difference.
The utility model has the advantages of it is following:
1. the method is characterized in that the salting-out crystallization reverse material is directly pumped out to the external cooler of the pre-cooling crystallizer and the operation of the cold crystallizer by using a submerged pump, so that the AI mother liquor in the external cooler is not in a supersaturated state after being cooled, the problem that the heat exchange tube of the external cooler is scabbed and blocked due to crystallization separation when the AI mother liquor of the external cooler reaches the supersaturated state after being cooled in the traditional process is solved, the operation period of the external cooler is prolonged to more than 24 hours, even, the continuous operation of the external cooler is realized without changing a vehicle, the number of the external coolers in operation is increased invisibly, the heat exchange area of the external cooler is increased, the existing device is optimized, in addition, the labor intensity of operators can be greatly reduced, and the cooling operation of the external cooler is.
2. The traditional process salting-out crystallization reverse material flow is cancelled, devices such as a salting-out thickener and a reverse material pump are cancelled, the labor load of operators is reduced, and the problems of safety and environmental protection caused by more devices, long pipelines and easy blockage in the traditional process are solved.
3. A traditional process heat AI cleaning pump is cancelled, so that the energy consumption is saved, the noise and environmental protection problems are solved, and the labor load of operators is reduced; calculate with 60 ten thousand tons of soda produced annually, three hot AI scavenging pumps need to be opened in the hot AI washing of precooling system of separating and cooling system external cooler (Q =600 m/H, H =35m, P =132 KW), and adopt the utility model discloses technology, the heat AI scavenging pump of getting rid of, then can practice thrift electric quantity 132 every year 3 every 8000 every 316.8 ten thousand kwh.
Claims (8)
1. The utility model provides a crystallization contrary material flow device in soda production process of soda process of alling oneself with alkali method which characterized in that: the device comprises a salting-out crystallizer, a cold-out crystallizer and a pre-cold-out crystallizer, wherein the cold-out crystallizer is connected with a cold-out external cooler for circularly cooling, a hot inlet of the cold-out external cooler is communicated with the cold-out crystallizer through a cold-out feeding pipeline, and a hot outlet of the cold-out external cooler is communicated with the cold-out crystallizer through a cold-out returning pipeline; the precooling crystallizer is connected with a precooling crystallizer external cooler for circulating cooling, the heat inlet of the precooling crystallizer external cooler is communicated with the precooling crystallizer through a precooling feeding pipeline, and the heat outlet of the precooling crystallizer external cooler is communicated with the precooling crystallizer through a precooling returning pipeline; the salting-out crystallizer is communicated with a cold separation feeding pipeline and a cold separation feeding pipeline through a submerged pump.
2. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: the cold separation feed pipeline and the pre-cooling separation feed pipeline are both communicated with an external hot AI mother liquor pipeline, first cleaning valves are respectively arranged at the communication positions of the cold separation feed pipeline, the pre-cooling separation feed pipeline and the external hot AI mother liquor pipeline, the cold separation return pipeline and the pre-cooling separation return pipeline are uniformly communicated with an external backheating AI mother liquor barrel, and second cleaning valves are respectively arranged at the communication positions of the cold separation return pipeline, the pre-cooling separation return pipeline and the external backheating AI mother liquor barrel; the height of the external hot AI mother liquor pipeline is higher than that of the cold separation external cooler and the pre-cooling separation external cooler, and the heights of the cold separation external cooler and the pre-cooling separation external cooler are higher than that of the external backheating AI mother liquor barrel.
3. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: and a cold inlet and a cold outlet of the cold separating external cooler are both communicated with a chilled water pipeline of an external lithium bromide system.
4. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: and a cold inlet of the pre-cooling and separating external cooler is communicated with a cold mother II liquid pipeline of the external salting-out crystallizer, and a cold outlet of the pre-cooling and separating external cooler is communicated with an external mother II liquid barrel.
5. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: the pre-cooling crystallizer is provided with a pre-cooling analysis overflow pipe communicated with the cold analysis crystallizer, the cold analysis crystallizer is communicated with an overflow pipe communicated with the salting-out crystallizer, and the salting-out crystallizer is also provided with an overflow pipe communicated with a pre-cooling analysis external cooler.
6. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: the pre-cooling crystallizer is communicated with a cold AI mother liquor pipeline of an external mother exchange system.
7. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: and a crystal slurry taking-out port of the cold precipitation crystallizer is communicated with an external cold precipitation thickener, and a crystal slurry taking-out port of the cold precipitation crystallizer is communicated with the cold precipitation crystallizer.
8. The crystallization reverse material flow device in the combined soda ash method production process according to claim 1, which is characterized in that: and a plurality of submerged pumps communicated with the cold separation feeding pipeline are arranged in the salting-out crystallizer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110921685A (en) * | 2019-11-26 | 2020-03-27 | 连云港市福源德邦科技发展有限公司 | Crystallization reverse material flow device and method in combined-soda-process soda ash production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110921685A (en) * | 2019-11-26 | 2020-03-27 | 连云港市福源德邦科技发展有限公司 | Crystallization reverse material flow device and method in combined-soda-process soda ash production process |
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