Device for preparing alkali from waste salt

Abstract

The utility model relates to the field of high-salt-content wastewater treatment, in particular to a waste salt alkali making device which comprises a salt dissolving pond and a first Jinyu reactor, a chemical mortar pump is installed outside the salt dissolving pond, and the first Jinyu reactor is communicated with a first automatic backwashing surface filter. The first automatic backwashing surface filter is communicated with a second Jinyu reactor, the second Jinyu reactor is communicated with a second automatic backwashing surface filter, the second automatic backwashing surface filter is communicated with an ammonium chloride crystallizer, and an output end pipe orifice of the ammonium chloride crystallizer is communicated with a third automatic backwashing surface filter. According to the waste salt alkali production device, efficient reaction can be realized, and the loss of chemicals is reduced; no extra waste water is generated, and the water supplementing amount of brine is saved; except for first-stage salt dissolving and impurity removal, the system does not additionally generate solid waste; the medicament consumption and the membrane replacement rate can be effectively reduced; patent equipment of Shaanxi Jinyu Science and Technology Development Co., Ltd is used, deployment and maintenance are easy, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of high-salt wastewater treatment, in particular to a waste salt alkali making device. Background Art

[0002] With the rapid development of the petrochemical and chemical industries, modern industry has gradually formed a relatively complete production system of petrochemicals, natural gas chemicals, coal chemicals, salt chemicals and biochemicals; however, while manufacturing a large number of petrochemical and chemical products, a large amount of chemical wastewater and waste are also generated. The composition of these chemical wastewater and waste is very complex, among which high-concentration salt-containing organic wastewater and waste are particularly prominent; if directly discharged, it may lead to waste of resources, affect the surrounding soil, and increase the salt content of the water body; the wastewater to be treated comes from the high-salt wastewater generated in various industrial production, mainly sodium sulfate and sodium chloride, and the waste salt comes from the solid waste containing sodium sulfate and sodium chloride generated in various production processes.

[0003] The current treatment measures mainly adopt harmless measures such as dilution discharge or evaporation concentration and incineration, which result in waste of salt resources. Therefore, we should find a process for resource utilization of alkali waste liquid to alleviate the problem of water resource shortage, reduce environmental pollution, and achieve a win-win situation of economic and environmental benefits. At the same time, using waste salt in the alkali industry is also an environmentally friendly way of resource utilization.

[0004] In order to solve the above problems, we have made improvements and proposed a waste salt alkali production device. Utility Model Content

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The utility model provides a waste salt alkali making device, comprising a salt-forming tank and a first Jinyu reactor, wherein a chemical mortar pump is fixedly installed on the outside of the salt-forming tank by bolts, and the input end and the output end of the chemical mortar pump are respectively connected to the salt-forming tank and the first Jinyu reactor through pipelines, the bottom of the first Jinyu reactor is fixedly connected by a pipeline and provided with a first automatic backwashing surface filter, the first automatic backwashing surface filter is fixedly connected by a pipeline and provided with a second Jinyu reactor, the bottom of the second Jinyu reactor is fixedly connected by a pipeline and provided with a second automatic backwashing surface filter, the second automatic backwashing surface filter is fixedly connected by a pipeline and provided with an ammonium chloride crystallizer, and the output end pipe mouth of the ammonium chloride crystallizer is fixedly connected by a pipeline and provided with a third automatic backwashing surface filter.

[0007] As an optimal technical solution of the present invention, a water supply pipe is fixedly installed on the top of the left side of the salt tank, a reduction motor is fixedly installed at the center of the top outside the salt tank by bolts, and a stirring shaft is rotatably installed at the center of the top surface inside the salt tank. The rotating shaft of the reduction motor is coaxially fixedly connected to the stirring shaft, and a stirring paddle is fixedly welded on the side surface of the bottom of the stirring shaft.

[0008] As an optimal technical solution of the present invention, the center of the top surface of the first Jin Yu reactor is fixedly connected to provide a second material port, the top left side of the first Jin Yu reactor is fixedly connected to provide a first material port, the first material port is fixedly connected to the salt tank through a pipeline, the bottom of the first Jin Yu reactor is fixedly connected to provide a mixed liquid outlet, and the structure of the second Jin Yu reactor is the same as that of the first Jin Yu reactor.

[0009] As an optimal technical solution of the present invention, the left bottom of the first automatic backwash surface filter is fixedly connected and provided with a liquid inlet, the left and right ends of the bottom surface of the first automatic backwash surface filter are fixedly connected and provided with spare ports, the center of the bottom surface of the first automatic backwash surface filter is fixedly connected and provided with a slag discharge port, the bottom end of the right side of the first automatic backwash surface filter is fixedly connected and provided with a backwash port, the top of the right side of the first automatic backwash surface filter is fixedly connected and provided with a clear liquid reflux port, the top of the left side of the first automatic backwash surface filter is fixedly connected and provided with a clear liquid port, and the structures of the third automatic backwash surface filter and the second automatic backwash surface filter are the same as those of the first automatic backwash surface filter.

[0010] As a preferred technical solution of the present invention, the liquid inlet of the first automatic backwash surface filter is fixedly connected to the mixed liquid outlet of the first Jinyu reactor through a pipeline, and ammonia is input into the second material port of the first Jinyu reactor.

[0011] As an optimal technical solution of the present invention, the clear liquid port of the first automatic backwash surface filter is fixedly connected to the first material port of the second Jinyu reactor through a pipeline, carbon dioxide is input into the second material port of the second Jinyu reactor, and the mixed liquid outlet of the second Jinyu reactor is fixedly connected to the liquid inlet of the second automatic backwash surface filter through a pipeline.

[0012] As a preferred technical solution of the present invention, the ammonium chloride crystallizer is added with sodium chloride powder and ammonia gas is introduced, the liquid inlet of the third automatic backwash surface filter is fixedly connected to the output end of the ammonium chloride crystallizer through a pipeline, and the clear liquid outlet of the third automatic backwash surface filter is fixedly connected to the salt tank through a pipeline.

[0013] The beneficial effects of the utility model are as follows: the waste salt alkali making device can react efficiently, making the alkali making process efficient and rapid, and reducing the loss of reagents; no additional wastewater is generated in the process, and the clear liquid generated by filtration is used for subsequent product production in the process, or recycled to the salt pool, saving the amount of salt water replenishment; except for the first stage of salt removal, the system does not generate additional solid waste; in the economic cost accounting, when sodium chloride is used as the raw material, 1 ton of sodium chloride correspondingly produces 1.44 tons of sodium bicarbonate and 0.91 tons of ammonium chloride, and the economic value brought by the disposal of each ton of ammonium chloride is: 2,601.38 yuan; this method can effectively reduce the amount of reagents used, the membrane replacement rate, and save floor space; using the patented equipment of Shaanxi Jinyu Technology Development Co., Ltd., it is easy to deploy and maintain and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a structural diagram of a waste salt alkali production device of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the first automatic backwash surface filter of a waste salt alkali making device of the utility model;

[0017] Figure 3 This is a schematic diagram of the process of a waste salt alkali production device of the utility model;

[0018] In the figure: 1. Salt tank; 2. Water supply pipe; 3. Reducer motor; 4. Agitator; 5. Chemical mortar pump; 6. First Jinyu reactor; 7. Second material port; 8. First material port; 9. Mixed liquid outlet; 10. First automatic backwash surface filter; 11. Second Jinyu reactor; 12. Second automatic backwash surface filter; 13. Ammonium chloride crystallizer; 14. Third automatic backwash surface filter; 15. Liquid inlet; 16. Spare port; 17. Slag discharge port; 18. Backflush port; 19. Clear liquid reflux port; 20. Clear liquid port. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0020] Example: Figure 1-3As shown, a waste salt alkali production device includes a salt tank 1 and a first Jinyu reactor 6. A chemical mortar pump 5 is fixedly installed on the outside of the salt tank 1 by bolts. The input and output ends of the chemical mortar pump 5 are connected to the salt tank 1 and the first Jinyu reactor 6 respectively through pipelines. The bottom of the first Jinyu reactor 6 is fixedly connected with a first automatic backwashing surface filter 10 through a pipeline. The first automatic backwashing surface filter 10 is fixedly connected with a second Jinyu reactor 11 through a pipeline. The bottom of the second Jinyu reactor 11 is fixedly connected with a second automatic backwashing surface filter 12 through a pipeline. The second automatic backwashing surface filter 12 is fixedly connected with an ammonium chloride crystallizer 13 through a pipeline. The output end pipe mouth of the ammonium chloride crystallizer 13 is fixedly connected with a third automatic backwashing surface filter 14 through a pipeline.

[0021] A water supply pipe 2 is fixedly installed on the top of the left side inside the salt tank 1, and a reduction motor 3 is fixedly installed on the center of the top outside the salt tank 1 by bolts. A stirring shaft is rotatably installed at the center of the top surface inside the salt tank 1, and the rotating shaft of the reduction motor 3 is coaxially fixedly connected to the stirring shaft. A stirring paddle 4 is fixedly welded on the side surface of the bottom of the stirring shaft.

[0022] The center of the top surface of the first Jin Yu reactor 6 is fixedly connected to a second material port 7, the top left side of the first Jin Yu reactor 6 is fixedly connected to a first material port 8, the first material port 8 is fixedly connected to the salt tank 1 through a pipeline, and the bottom of the first Jin Yu reactor 6 is fixedly connected to a mixed liquid outlet 9. The structure of the second Jin Yu reactor 11 is the same as that of the first Jin Yu reactor 6.

[0023] The left bottom of the first automatic backwash surface filter 10 is fixedly connected and provided with a liquid inlet 15, and the left and right ends of the bottom surface of the first automatic backwash surface filter 10 are fixedly connected and provided with spare ports 16. The spare port 16 is used to perform filter membrane regeneration during regular maintenance work to ensure stable operation of the equipment. The center of the bottom surface of the first automatic backwash surface filter 10 is fixedly connected and provided with a slag discharge port 17. The slag discharge port 17 should be used for receiving recovery equipment such as a collection tank. The bottom end of the right side of the first automatic backwash surface filter 10 is fixedly connected and provided with a backwash port 18. The top of the right side of the first automatic backwash surface filter 10 is fixedly connected and provided with a clear liquid reflux port 19. The top of the left side of the first automatic backwash surface filter 10 is fixedly connected and provided with a clear liquid port 20. The structures of the third automatic backwash surface filter 14 and the second automatic backwash surface filter 12 are the same as those of the first automatic backwash surface filter 10.

[0024] The liquid inlet 15 of the first automatic backwash surface filter 10 is fixedly connected to the mixed liquid outlet 9 of the first Jinyu reactor 6 through a pipeline, and ammonia gas is input into the second material port 7 of the first Jinyu reactor 6.

[0025] The clear liquid port 20 of the first automatic backwash surface filter 10 is fixedly connected to the first material port 8 of the second Jin Yu reactor 11 through a pipeline, the second material port 7 of the second Jin Yu reactor 11 inputs carbon dioxide, and the mixed liquid outlet 9 of the second Jin Yu reactor 11 is fixedly connected to the liquid inlet 15 of the second automatic backwash surface filter 12 through a pipeline.

[0026] The ammonium chloride crystallizer 13 is added with sodium chloride powder and ammonia gas is introduced. The liquid inlet 15 of the third automatic backwash surface filter 14 is fixedly connected to the output end of the ammonium chloride crystallizer 13 through a pipeline, and the clear liquid port 20 of the third automatic backwash surface filter 14 is fixedly connected to the salt tank 1 through a pipeline.

[0027] Among them, the Jinyu reactor and automatic backwash surface filter are both authorized patented equipment of Shaanxi Jinyu Technology Development Co., Ltd.

[0028] Working principle: This waste salt alkali making device operates according to the following steps:

[0029] 1. Salting and impurity removal: waste salt is put into the salting tank 1, and saturated brine is obtained after salting. The saturated brine enters the first Jinyu reactor 6, and ammonia gas is introduced through the second material port 7 to obtain ammonia brine. The ammonia brine is filtered through the first automatic backwash surface filter 10 to remove particulate impurities in the liquid. If the wastewater is high in salt content, salting is omitted and the wastewater directly enters the first Jinyu reactor 6 for reaction and impurity removal;

[0030] 2. Carbonization crystallization: The clear liquid enters the second Jinyu reactor 11, and carbon dioxide is introduced through the second material port 7 for carbonization reaction. The liquid after the reaction enters the second automatic backwash surface filter 12 for filtration, and sodium bicarbonate crystals can be separated at this time;

[0031] 3. Cooling crystallization: The clear liquid enters the ammonium chloride crystallizer 13, and a small amount of sodium chloride fine powder and ammonia gas are added at the same time to precipitate ammonium chloride crystals. At this time, the mixed solution enters the third automatic backwash surface filter 14 for filtration to separate the ammonium chloride crystals. The clear liquid is a basically saturated sodium chloride solution and is returned to the salt tank for reuse;

[0032] 4. The sodium bicarbonate produced in the second step can be taken out and further calcined to obtain a soda ash product, i.e., sodium carbonate. The carbon dioxide produced can be returned to the second Jinyu reactor 11 for reuse, and the ammonium chloride crystals produced in the third step are further processed to obtain a nitrogen fertilizer.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A waste salt alkali production device, comprising a salt tank (1) and a first Jinyu reactor (6), characterized in that: A chemical mortar pump (5) is fixedly installed on the outside of the salting tank (1) by bolts, and the input end and output end of the chemical mortar pump (5) are respectively connected to the salting tank (1) and the first Jinyu reactor (6) through pipelines. The bottom of the first Jinyu reactor (6) is fixedly connected to a first automatic backwashing surface filter (10) through a pipeline, and the first automatic backwashing surface filter (10) is fixedly connected to a second Jinyu reactor (11) through a pipeline. The bottom of the second Jinyu reactor (11) is fixedly connected to a second automatic backwashing surface filter (12) through a pipeline, and the second automatic backwashing surface filter (12) is fixedly connected to an ammonium chloride crystallizer (13) through a pipeline. The output end pipe mouth of the ammonium chloride crystallizer (13) is fixedly connected to a third automatic backwashing surface filter (14) through a pipeline.

2. The waste salt alkali making device according to claim 1, characterized in that: A water supply pipe (2) is fixedly installed on the top of the left side of the interior of the salt tank (1); a reduction motor (3) is fixedly installed at the center of the exterior top of the salt tank (1) via bolts; a stirring shaft is rotatably installed at the center of the top surface of the interior of the salt tank (1); the rotating shaft of the reduction motor (3) is coaxially fixedly connected to the stirring shaft; and a stirring paddle (4) is fixedly welded to the side surface of the bottom of the stirring shaft.

3. The waste salt alkali making device according to claim 1, characterized in that: The center of the top surface of the first Jinyu reactor (6) is fixedly connected with a second material port (7), the top left side of the first Jinyu reactor (6) is fixedly connected with a first material port (8), the first material port (8) is fixedly connected with the salt tank (1) through a pipeline, the bottom of the first Jinyu reactor (6) is fixedly connected with a mixed liquid outlet (9), and the structure of the second Jinyu reactor (11) is the same as that of the first Jinyu reactor (6).

4. The waste salt alkali making device according to claim 3, characterized in that: The left bottom of the first automatic backwash surface filter (10) is fixedly connected to be provided with a liquid inlet (15), the left and right ends of the bottom surface of the first automatic backwash surface filter (10) are fixedly connected to be provided with a spare port (16), the center of the bottom surface of the first automatic backwash surface filter (10) is fixedly connected to be provided with a slag discharge port (17), the right bottom end of the first automatic backwash surface filter (10) is fixedly connected to be provided with a backwash port (18), the right top end of the first automatic backwash surface filter (10) is fixedly connected to be provided with a clear liquid return port (19), and the left top end of the first automatic backwash surface filter (10) is fixedly connected to be provided with a clear liquid port (20). The structures of the third automatic backwash surface filter (14) and the second automatic backwash surface filter (12) are the same as those of the first automatic backwash surface filter (10).

5. The waste salt alkali making device according to claim 4, characterized in that: The liquid inlet (15) of the first automatic backwash surface filter (10) is fixedly connected to the mixed liquid outlet (9) of the first Jinyu reactor (6) through a pipeline, and ammonia is input into the second material port (7) of the first Jinyu reactor (6).

6. The waste salt alkali making device according to claim 5, characterized in that: The clear liquid port (20) of the first automatic backwash surface filter (10) is fixedly connected to the first material port (8) of the second Jinyu reactor (11) through a pipeline, carbon dioxide is input into the second material port (7) of the second Jinyu reactor (11), and the mixed liquid outlet (9) of the second Jinyu reactor (11) is fixedly connected to the liquid inlet (15) of the second automatic backwash surface filter (12) through a pipeline.

7. The waste salt alkali making device according to claim 6, characterized in that: The ammonium chloride crystallizer (13) is added with sodium chloride powder and ammonia gas is introduced, the liquid inlet (15) of the third automatic backwash surface filter (14) is fixedly connected to the output end of the ammonium chloride crystallizer (13) through a pipeline, and the clear liquid outlet (20) of the third automatic backwash surface filter (14) is fixedly connected to the salt tank (1) through a pipeline.

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