CN211496959U - Zero release caustic soda production system - Google Patents
Zero release caustic soda production system Download PDFInfo
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- CN211496959U CN211496959U CN201922273812.4U CN201922273812U CN211496959U CN 211496959 U CN211496959 U CN 211496959U CN 201922273812 U CN201922273812 U CN 201922273812U CN 211496959 U CN211496959 U CN 211496959U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a zero release caustic soda production system, it includes quick lime preparation system, carbonators, brine source, baking soda pond, causticization reaction system, centrifuge, agitator, water source and desulfurization absorption tower. Has the advantages that: the utility model has simple connection relationship, realizes zero emission, fully absorbs and utilizes the heat energy of high-temperature dust-containing gas, and saves energy; the recycling of carbon dioxide is realized, the amount of carbon dioxide discharged into the atmosphere is reduced, the greenhouse effect is reduced, and the environment is protected; the recycling of the causticized mud is realized, and the land occupation and the land pollution are avoided; meanwhile, the effect of flue gas desulfurization is realized, the environment is protected, and the produced gypsum can be sold.
Description
The technical field is as follows:
the utility model relates to a production system, in particular to zero release caustic soda production system.
Background art:
the caustic soda process for producing sodium hydroxide is a mature process, and utilizes the advantage of low cost of natural alkali liquor to produce caustic soda with relatively high price; the method is that limestone is sent into a lime kiln to be calcined, so that the limestone is decomposed into quicklime (calcium oxide) and carbon dioxide, and the quicklime is added with water to be lime milk (Ca (OH)2) Lime milk and brine (sodium carbonate) are subjected to causticization reaction to generate caustic soda and causticized mud (calcium carbonate); although caustic soda is produced by the above method, there are the followingThe problems are as follows: 1. high-temperature dust-containing gas decomposed after calcination in the calcination lime kiln needs to be cooled by a cooler and then is discharged after being dedusted by a deduster, so that waste of heat energy is caused, and simultaneously, the surface temperature of the earth is increased by a large amount of discharged carbon dioxide gas, so that a greenhouse effect is generated, and the environment is harmed; 2. the causticized mud is waste residue produced in the caustic soda production process, about 1.75 tons of causticized mud is produced when 1 ton of caustic soda is produced, and the main method for treating the causticized mud at present is to send the causticized mud to a special storage yard for storage or centralized landfill, so that the occupied area is large, the soil is corroded, the soil is alkalized, and the plant growth is damaged; the causticized mud has strong permeability and seriously pollutes the environment.
The utility model has the following contents:
an object of the utility model is to provide a relation of connection is simple, and has realized resource recovery's zero release caustic soda production system.
The utility model discloses by following technical scheme implement: a zero-emission caustic soda production system comprises a quicklime preparation system, a carbonization tower, a brine source, a baking soda pool, a causticization reaction system, a centrifugal machine, a stirrer, a water source and a desulfurization absorption tower; the gas outlet of the dust remover of the quicklime preparation system is communicated with the gas inlet of the carbonization tower through a pipeline; the liquid outlet of the brine source is communicated with the liquid inlet of the carbonization tower through a pipeline; the liquid outlet of the carbonization tower is communicated with the liquid inlet of the baking soda pool through a pipeline; a discharge hole of a cooler of the quicklime preparation system is connected with a feed hole of a lime milk storage barrel of the causticization reaction system; the liquid outlet of the brine source is communicated with the liquid inlet of the lime milk storage barrel through a pipeline; a slag discharge port of a clarifying barrel of the causticization reaction system is communicated with a liquid inlet of the centrifugal machine through a pipeline, and the slag discharge port of the centrifugal machine is connected with a feed inlet of the stirrer; the water source with the water inlet of agitator passes through the pipeline intercommunication, the liquid outlet of agitator with the inlet of desulfurization absorption tower passes through the pipeline intercommunication.
Further, the quick lime preparation system comprises a limestone storage tank, a preheater, a lime kiln, the dust remover and the cooler; the discharge port of the limestone storage tank is connected with the feed inlet of the preheater, the discharge port of the preheater is connected with the feed inlet of the lime kiln, the gas outlet of the lime kiln is communicated with the gas inlet of the preheater through a pipeline, the gas outlet of the preheater is communicated with the gas inlet of the dust remover through a pipeline, and the discharge port of the lime kiln is connected with the feed inlet of the cooler.
Further, the causticizing reaction system comprises the lime milk storage barrel, a causticizing reactor, the clarifying barrel, an evaporator, a filter and a caustic soda storage tank; the liquid outlet of the lime milk storage barrel is communicated with the liquid inlet of the causticizing reactor through a pipeline; the liquid outlet of the causticization reactor is communicated with the liquid inlet of the clarifying barrel through a pipeline; the supernatant overflow port of the clarifying barrel is communicated with the liquid inlet of the evaporator through a pipeline, the liquid outlet of the evaporator is communicated with the liquid inlet of the filter through a pipeline, and the liquid outlet of the filter is communicated with the liquid inlet of the caustic soda storage tank through a pipeline.
Furthermore, a liquid outlet of the centrifuge is communicated with a liquid inlet of the cache tank through a pipeline, and a liquid outlet of the cache tank is communicated with a liquid inlet of the causticizing reactor through a pipeline.
The utility model has the advantages that: 1. the utility model has simple connection relationship and realizes zero discharge, and the high-temperature dust-containing gas generated after the lime kiln is calcined enters the preheater to exchange heat with the limestone, thereby fully absorbing and utilizing the heat energy of the high-temperature dust-containing gas and saving the energy; the heat-exchanged dust-containing gas is dedusted by the deduster and then enters the carbonization tower to be mixed with the brine for reaction to generate the baking soda, so that the recycling of carbon dioxide is realized, the amount of carbon dioxide discharged into the atmosphere is reduced, the greenhouse effect is reduced, and the environment is protected; 2. the generated causticized mud is directly mixed with water in a stirrer, and the mixture is sent to a desulfurization absorption tower as a desulfurizing agent to react with sulfur dioxide in boiler flue gas to generate gypsum, so that the causticized mud is recycled, and land occupation and land pollution are avoided; meanwhile, the effect of flue gas desulfurization is realized, the environment is protected, and the produced gypsum can be sold.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Quick lime preparation system 1, lime stone stock chest 1.1, pre-heater 1.2, lime kiln 1.3, dust remover 1.4, cooler 1.5, carbonator 2, brine source 3, baking soda pond 4, causticization reaction system 5, lime cream storage bucket 5.1, causticization reactor 5.2, clarification bucket 5.3, evaporimeter 5.4, filter 5.5, caustic soda storage tank 5.6, centrifuge 6, agitator 7, water source 8, desulfurization absorption tower 9, buffer tank 10.
The specific implementation mode is as follows:
as shown in fig. 1, a zero-emission caustic soda production system comprises a quicklime preparation system 1, a carbonization tower 2, a brine source 3, a baking soda pond 4, a causticization reaction system 5, a centrifuge 6, a stirrer 7, a water source 8 and a desulfurization absorption tower 9; the gas outlet of a dust remover 1.4 of the quicklime preparation system 1 is communicated with the gas inlet of the carbonization tower 2 through a pipeline; a liquid outlet of the brine source 3 is communicated with a liquid inlet of the carbonization tower 2 through a pipeline; the liquid outlet of the carbonization tower 2 is communicated with the liquid inlet of the baking soda tank 4 through a pipeline; a discharge hole of a cooler 1.5 of the quicklime preparation system 1 is connected with a feed hole of a lime milk storage barrel 5.1 of the causticization reaction system 5; the liquid outlet of the brine source 3 is communicated with the liquid inlet of the lime milk storage barrel 5.1 through a pipeline; a slag discharge port of a clarifying barrel 5.3 of the causticization reaction system 5 is communicated with a liquid inlet of a centrifugal machine 6 through a pipeline, and the slag discharge port of the centrifugal machine 6 is connected with a feed inlet of a stirrer 7; the water source 8 is communicated with the water inlet of the stirrer 7 through a pipeline, and the liquid outlet of the stirrer 7 is communicated with the liquid inlet of the desulfurization absorption tower 9 through a pipeline.
The quicklime preparation system 1 comprises a limestone storage tank 1.1, a preheater 1.2, a lime kiln 1.3, a dust remover 1.4 and a cooler 1.5; the discharge gate of lime stone silo 1.1 is connected with preheater 1.2's feed inlet, and preheater 1.2's discharge gate is connected with lime kiln 1.3's feed inlet, and the pipeline intercommunication is passed through with preheater 1.2's air inlet to lime kiln 1.3's gas outlet, and the pipeline intercommunication is passed through with dust remover 1.4's air inlet to preheater 1.2's gas outlet, and lime kiln 1.3's discharge gate is connected with cooler 1.5's feed inlet.
The causticization reaction system 5 comprises a lime milk storage barrel 5.1, a causticization reactor 5.2, a clarifying barrel 5.3, an evaporator 5.4, a filter 5.5 and a caustic soda storage tank 5.6; the liquid outlet of the lime milk storage barrel 5.1 is communicated with the liquid inlet of the causticizing reactor 5.2 through a pipeline; the liquid outlet of the causticizing reactor 5.2 is communicated with the liquid inlet of the clarifying barrel 5.3 through a pipeline; a supernatant overflow port of the clarifying barrel 5.3 is communicated with a liquid inlet of the evaporator 5.4 through a pipeline, a liquid outlet of the evaporator 5.4 is communicated with a liquid inlet of the filter 5.5 through a pipeline, and a liquid outlet of the filter 5.5 is communicated with a liquid inlet of the caustic soda storage tank 5.6 through a pipeline; the liquid outlet of the centrifuge 6 is communicated with the liquid inlet of the buffer tank 10 through a pipeline, and the liquid outlet of the buffer tank 10 is communicated with the liquid inlet of the causticizing reactor 5.2 through a pipeline.
The working process is as follows: limestone enters a lime kiln 1.3 after being preheated by a preheater 1.2 and is calcined in the lime kiln 1.3, the limestone is decomposed into quicklime and carbon dioxide, high-temperature dusty gas from the lime kiln 1.3 is sent to the preheater 1.2 to exchange heat with the limestone, the temperature of the limestone rises after absorbing the heat of the high-temperature dusty gas, can reach 900 ℃, the heat energy of the high-temperature dusty gas is fully absorbed and utilized, and the energy is saved; the dust-containing gas with the reduced temperature enters a dust remover 1.4 for dust removal, and the gas (containing a large amount of carbon dioxide) after dust removal is sent to a carbonization tower 2 to react with brine to produce sodium bicarbonate, so that the recycling of the carbon dioxide is realized, the amount of the carbon dioxide discharged into the atmosphere is reduced, the greenhouse effect is reduced, and the environment is protected; cooling the quick lime from the lime kiln 1.3 by a cooler 1.5, then sending the quick lime to a lime milk storage barrel 5.1 to be mixed with brine for pre-causticization reaction, then sending the solution in the lime milk storage barrel 5.1 to a causticization reactor 5.2 to complete the causticization reaction to form causticized liquid, then sending the causticized liquid to a clarifying barrel 5.3, standing and separating the causticized liquid in the clarifying barrel 5.3, overflowing the supernatant which is light alkali liquor to an evaporator 5.4 for evaporation and concentration, and then filtering and removing impurities by a filter 5.5 to obtain a caustic soda product; liquid at the bottom of the clarifying barrel 5.3 is sent to a centrifuge 6 for solid-liquid separation, filtrate is sent to a buffer tank 10, and is periodically returned to the causticizing reactor 5.2 for carrying out causticizing reaction again, filter cakes (namely causticized mud) are sent to a stirrer 7 to be mixed with water, and the mixed filter cakes are sent to a desulfurization absorption tower 9 as a desulfurizing agent to react with sulfur dioxide in boiler flue gas to generate gypsum, so that the recycling of the causticized mud is realized, and land occupation and land pollution are avoided; meanwhile, the effect of flue gas desulfurization is realized, the environment is protected, and the produced gypsum can be sold.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A zero-emission caustic soda production system is characterized by comprising a quicklime preparation system, a carbonization tower, a brine source, a baking soda pool, a causticization reaction system, a centrifugal machine, a stirrer, a water source and a desulfurization absorption tower; the gas outlet of the dust remover of the quicklime preparation system is communicated with the gas inlet of the carbonization tower through a pipeline; the liquid outlet of the brine source is communicated with the liquid inlet of the carbonization tower through a pipeline; the liquid outlet of the carbonization tower is communicated with the liquid inlet of the baking soda pool through a pipeline; a discharge hole of a cooler of the quicklime preparation system is connected with a feed hole of a lime milk storage barrel of the causticization reaction system; the liquid outlet of the brine source is communicated with the liquid inlet of the lime milk storage barrel through a pipeline; a slag discharge port of a clarifying barrel of the causticization reaction system is communicated with a liquid inlet of the centrifugal machine through a pipeline, and the slag discharge port of the centrifugal machine is connected with a feed inlet of the stirrer; the water source with the water inlet of agitator passes through the pipeline intercommunication, the liquid outlet of agitator with the inlet of desulfurization absorption tower passes through the pipeline intercommunication.
2. The zero-emission caustic soda production system of claim 1, wherein the quicklime preparation system comprises a limestone storage tank, a preheater, a lime kiln, the dust remover and the cooler; the discharge port of the limestone storage tank is connected with the feed inlet of the preheater, the discharge port of the preheater is connected with the feed inlet of the lime kiln, the gas outlet of the lime kiln is communicated with the gas inlet of the preheater through a pipeline, the gas outlet of the preheater is communicated with the gas inlet of the dust remover through a pipeline, and the discharge port of the lime kiln is connected with the feed inlet of the cooler.
3. The zero-emission caustic soda production system according to claim 1, wherein the causticization reaction system comprises the lime milk storage barrel, a causticization reactor, the clarifying barrel, an evaporator, a filter and a caustic soda storage tank; the liquid outlet of the lime milk storage barrel is communicated with the liquid inlet of the causticizing reactor through a pipeline; the liquid outlet of the causticization reactor is communicated with the liquid inlet of the clarifying barrel through a pipeline; the supernatant overflow port of the clarifying barrel is communicated with the liquid inlet of the evaporator through a pipeline, the liquid outlet of the evaporator is communicated with the liquid inlet of the filter through a pipeline, and the liquid outlet of the filter is communicated with the liquid inlet of the caustic soda storage tank through a pipeline.
4. The zero-emission caustic soda production system according to claim 3, wherein a liquid outlet of the centrifuge is communicated with a liquid inlet of the buffer tank through a pipeline, and a liquid outlet of the buffer tank is communicated with a liquid inlet of the causticizing reactor through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922273812.4U CN211496959U (en) | 2019-12-17 | 2019-12-17 | Zero release caustic soda production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922273812.4U CN211496959U (en) | 2019-12-17 | 2019-12-17 | Zero release caustic soda production system |
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| CN211496959U true CN211496959U (en) | 2020-09-15 |
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| CN201922273812.4U Active CN211496959U (en) | 2019-12-17 | 2019-12-17 | Zero release caustic soda production system |
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Inventor after: Ding Ximei Inventor after: Wang Qiang Inventor after: Zhang Yuping Inventor after: Wu Bateer Inventor after: Li Yonggang Inventor after: Zhang Guochen Inventor after: Wang Guoping Inventor after: Zhang Shuping Inventor after: Liu Yina Inventor after: Guo Binghong Inventor before: Ding Ximei Inventor before: Wang Qiang Inventor before: Zhang Yuping Inventor before: Wu Bateer Inventor before: Li Yonggang Inventor before: Zhang Guochen Inventor before: Wang Guoping Inventor before: Zhang Shuping Inventor before: Liu Yina Inventor before: Guo Binghong |