Sodium carbonate mother liquor purification device

Abstract

The utility model relates to the technical field of chemical product mother liquor treatment, and discloses a sodium carbonate mother liquor purification device which comprises a mixing tank, a stirring unit, a concentration and separation unit and a washing unit, a quantitative box is fixedly connected to the top end of the mixing tank, a feeding port is fixedly connected to the top end of the quantitative box, a discharging port is formed in the front portion of the bottom end of the quantitative box, an electric push rod is fixedly connected to the rear portion of the bottom end of the quantitative box, and a movable plate is fixedly connected to the telescopic end of the electric push rod. The middle of the front end of the movable plate is fixedly connected with one end of a push column. According to the utility model, sodium carbonate mother liquor and quantitative magnesium chloride are subjected to mixed reaction, heating concentration and solid-liquid separation are carried out, solid is separated, impurities are washed to obtain a basic magnesium carbonate product, and separated liquid is continuously concentrated and separated, so that the sodium carbonate mother liquor is recycled, excessive residual saturated solution is not generated during the period, and the generation of new mother liquor is avoided; and the utilization efficiency of resources is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical product mother liquor treatment, in particular to a sodium carbonate mother liquor purification device. Background Art

[0002] Mother liquor refers to the saturated solution remaining after the precipitate or crystal is separated during the chemical precipitation or crystallization process. The existing sodium carbonate mother liquor generally does not exist alone, but may be a mixture of multiple substances. In particular, the sodium percarbonate mother liquor, which is close to the sodium carbonate mother liquor, is the most common. The sodium percarbonate mother liquor contains most of the sodium carbonate mother liquor, as well as sodium chloride and a small amount of phosphate and magnesium salt. Due to the high content of alkali and sodium chloride, it needs to be neutralized and diluted before it can be processed, and the processing cost is high. Extracting the sodium carbonate mother liquor for recycling and recycling the mother liquor has always been a technical problem for sodium percarbonate production companies.

[0003] Based on the above analysis, the existing sodium carbonate mother liquor mixed liquid, during the process of purification and recycling, cannot quantitatively input the medium raw materials for the reaction, resulting in the subsequent mother liquor increasing instead of decreasing, and the existing mixed sodium carbonate mother liquor is inconvenient to circulate during the reaction process, resulting in insufficient mother liquor utilization. Therefore, the present application proposes a sodium carbonate mother liquor purification device to meet the demand. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art that, in the process of purification and recycling of sodium carbonate mother liquor, the medium raw material for the reaction cannot be quantitatively input, resulting in an increase in subsequent mother liquor instead of a decrease, and the existing mixed sodium carbonate mother liquor is inconvenient to circulate during the reaction process, resulting in insufficient mother liquor utilization, and a sodium carbonate mother liquor purification device is proposed.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a sodium carbonate mother liquor purification device, comprising a mixing tank, a stirring unit, a concentration and separation unit and a washing unit; the top of the mixing tank is fixedly connected to a quantitative box, the top of the quantitative box is fixedly connected to a feeding port, the bottom front of the quantitative box is provided with a discharge port, the bottom rear of the quantitative box is fixedly connected to an electric push rod, the telescopic end of the electric push rod is fixedly connected to a moving plate, the front middle of the moving plate is fixedly connected to one end of a push column, the other end of the push column is equidistantly fixedly connected to four discharge plates, the discharge plates are all slidably connected in the quantitative box, and the discharge plates are used to feed equal amounts of materials. The reaction medium is introduced into the quantitative box, a slide groove is provided at the upper rear end of the quantitative box, a sealing plate is slidably connected in the slide groove, and one side of the sealing plate is fixedly connected to the upper front end of the movable plate; the stirring unit is used to stir and mix the sodium carbonate mother liquor and the reaction medium magnesium chloride; the concentration and separation unit is used to pyrolyze and concentrate the mixed sodium carbonate mother liquor, and perform solid-liquid separation on the pyrolyzed sodium carbonate mother liquor, the separated liquid is circulated and concentrated, and the solid enters the washing unit for washing; the washing unit is used to wash solid impurities to obtain recovered carbonate products; the mixing tank, the stirring unit, the concentration and separation unit and the washing unit are all connected to the mixing tank.

[0006] Through the above technical scheme, the sodium carbonate mother liquor is mixed with a certain amount of magnesium chloride to react to generate hydrated magnesium carbonate, the hydrated magnesium carbonate slurry is pumped into a concentrator, and the temperature is increased to pyrolyze and concentrate, and then the slurry after pyrolysis is passed through a solid-liquid separation device for solid-liquid separation, the separated solid is washed with water through a washing unit to remove water-soluble impurities to obtain a basic magnesium carbonate product, and the separated liquid continues to enter the concentrator for cyclic concentration and separation, thereby realizing the recycling of the sodium carbonate mother liquor, and during the process, no excessive residual saturated solution will be generated, thereby avoiding the generation of new mother liquor and improving the utilization efficiency of resources.

[0007] Furthermore, the stirring unit includes a driving motor fixedly connected to the bottom of the mixing tank, the output end of the driving motor passes through the bottom handle of the mixing tank and is fixedly connected to one end of a stirring paddle, and a scraping ring is fixedly connected to the outer side of the stirring paddle.

[0008] Through the above technical solution, the driving motor is used to drive the stirring paddle and the scraper ring to rotate and stir, and at the same time clean the inner wall of the mixing tank.

[0009] Furthermore, the concentration and separation unit includes a concentration device arranged on one side of the mixing tank, a heating device is arranged in the concentration device, a solid-liquid separation device is arranged on one side of the concentration device, both sides of the concentration device are connected with the mixing tank and the solid-liquid separation device through pipelines respectively, and the bottom end of the solid-liquid separation device is connected with the bottom end of the concentration device through a delivery pump.

[0010] Through the above technical scheme, the mixed sodium carbonate mother liquor is heated and concentrated by using a concentrating device, and the mixed sodium carbonate mother liquor is separated into solid and liquid by using a solid-liquid separation device.

[0011] Furthermore, the washing unit includes a washing box arranged on one side of the solid-liquid separation device, a plurality of filter plates are fixedly connected to the washing box, the filter plates are arranged at an angle, nozzles are fixedly connected to the rear side of the washing box at equal intervals, and the nozzles are arranged between two adjacent filter plates, and the top of the washing box is connected to the solid discharge port of the solid-liquid separation device through a conveying pump.

[0012] Through the above technical solution, the filter plate arranged obliquely in the washing box is utilized to increase the flushing area and flushing effect.

[0013] Furthermore, a waste liquid collection box is provided at the bottom end of the washing box, and the bottom end of the washing box is connected to the waste liquid collection box through a one-way valve pipe.

[0014] Through the above technical solution, the waste liquid collection box and the one-way valve pipe are used to collect the waste water after washing.

[0015] Furthermore, a water storage tank is arranged at the rear of the washing box, a water pump is fixedly connected to the bottom wall of the water storage tank, and a water outlet of the water pump is connected to the nozzle through a pipeline.

[0016] Through the above technical solution, a water storage tank and a water pump are used to supply water for the washing operation of the nozzle.

[0017] Furthermore, a mother liquid delivery interface is fixedly connected to the other side of the mixing tank.

[0018] Through the above technical solution, the sodium carbonate mother liquor is quickly introduced through the mother liquor delivery interface.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model, sodium carbonate mother liquor is mixed with a certain amount of magnesium chloride to react, hydrated magnesium carbonate is generated, the hydrated magnesium carbonate slurry is pumped into a concentrating device, and is heated to be pyrolyzed and concentrated, and then the slurry after the pyrolysis is passed through a solid-liquid separation device for solid-liquid separation, the separated solid is washed with water through a washing unit to remove water-soluble impurities, and a basic magnesium carbonate product is obtained, and the separated liquid continues to enter the concentrating device for cyclic concentration and separation, thereby realizing the recycling of the sodium carbonate mother liquor, and during the process, too much residual saturated solution will not be generated, so the generation of new mother liquor is avoided, and the utilization efficiency of resources is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a sodium carbonate mother liquor purification device proposed by the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a concentration and separation unit of a sodium carbonate mother liquor purification device proposed in the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of a stirring unit of a sodium carbonate mother liquor purification device proposed in the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of a quantitative box of a sodium carbonate mother liquor purification device proposed in the utility model;

[0025] Figure 5 The utility model provides a schematic diagram of the internal structure of a washing box of a sodium carbonate mother liquor purification device.

[0026] Legend:

[0027] 1. Mixing tank; 2. Stirring unit; 201. Driving motor; 202. Stirring paddle; 203. Scraping ring; 3. Concentration and separation unit; 301. Concentration device; 302. Solid-liquid separation device; 4. Washing unit; 401. Washing box; 402. Filter plate; 403. Nozzle; 404. Waste liquid collection box; 405. One-way valve pipe; 406. Water storage tank; 5. Dosing box; 6. Feed inlet; 7. Discharge port; 8. Electric push rod; 9. Moving plate; 10. Push column; 11. Discharge plate; 12. Slide; 13. Sealing plate; 14. Mother liquor delivery interface. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Reference Figure 1-5The utility model provides an embodiment: a sodium carbonate mother liquor purification device, comprising a mixing tank 1, a stirring unit 2, a concentration and separation unit 3 and a washing unit 4; a quantitative box 5 is fixedly connected to the top of the mixing tank 1, a feeding port 6 is fixedly connected to the top of the quantitative box 5, a discharge port 7 is provided at the front of the bottom end of the quantitative box 5, an electric push rod 8 is fixedly connected to the rear of the bottom end of the quantitative box 5, a moving plate 9 is fixedly connected to the telescopic end of the electric push rod 8, one end of a push column 10 is fixedly connected to the middle of the front end of the moving plate 9, and four discharge plates 11 are fixedly connected to the other end of the push column 10 at equal distances, and the discharge plates 11 are all slidably connected in the quantitative box 5, and the discharge plates 11 are used to The reaction medium is added in an amount, a slide groove 12 is provided at the upper rear end of the quantitative box 5, a sealing plate 13 is slidably connected in the slide groove 12, and one side of the sealing plate 13 is fixedly connected to the upper front end of the movable plate 9; the stirring unit 2 is used to stir and mix the sodium carbonate mother liquor and the reaction medium magnesium chloride; the concentration and separation unit 3 is used to pyrolyze and concentrate the mixed sodium carbonate mother liquor, and perform solid-liquid separation on the pyrolyzed sodium carbonate mother liquor, the separated liquid is circulated and concentrated, and the solid enters the washing unit 4 for washing; the washing unit 4 is used to wash solid impurities to obtain recovered carbonate products; the mixing tank 1, the stirring unit 2, the concentration and separation unit 3 and the washing unit 4 are all connected to the mixing tank 1. The sodium carbonate mother liquor is mixed with a certain amount of magnesium chloride to react to generate hydrated magnesium carbonate. The hydrated magnesium carbonate slurry is pumped into the concentrator 301, and the temperature is increased to pyrolyze and concentrate. The slurry after pyrolysis is then passed through the solid-liquid separation device 302 for solid-liquid separation. The separated solid is washed with water through the washing unit 4 to remove water-soluble impurities to obtain a basic magnesium carbonate product. The separated liquid continues to enter the concentrator 301 for circulation, concentration and separation, thereby realizing the recycling of the sodium carbonate mother liquor. During the process, no excessive residual saturated solution will be generated, thus avoiding the generation of new mother liquor and improving the utilization efficiency of resources.

[0030] A waste liquid collection tank 404 is provided at the bottom end of the washing box 401, and the bottom end of the washing box 401 is connected to the waste liquid collection tank 404 through a one-way valve pipe 405. The waste liquid collection tank 404 and the one-way valve pipe 405 are used to collect waste water after washing. A water storage tank 406 is provided at the rear of the washing box 401, and a water pump is fixedly connected to the bottom wall of the water storage tank 406, and the water outlet of the water pump is connected to the nozzle 403 through a pipeline. The water storage tank 406 and the water pump are used to supply water for the washing operation of the nozzle 403.

[0031] The other side of the mixing tank 1 is fixedly connected with a mother liquor delivery interface 14. The mother liquor delivery interface 14 is used to quickly introduce sodium carbonate mother liquor.

[0032] As an implementation method in this embodiment, Figure 3As shown, the stirring unit 2 includes a driving motor 201 fixedly connected to the bottom of the mixing tank 1, the output end of the driving motor 201 passes through the bottom handle of the mixing tank 1 and is fixedly connected to one end of the stirring paddle 202, and a scraping ring 203 is fixedly connected to the outer side of the stirring paddle 202. The driving motor 201 drives the stirring paddle 202 and the scraping ring 203 to rotate and stir, and at the same time clean the inner wall of the mixing tank 1.

[0033] As an implementation method in this embodiment, Figure 2 As shown, the concentration and separation unit 3 includes a concentration device 301 disposed on one side of the mixing tank 1, a heating device is disposed in the concentration device 301, a solid-liquid separation device 302 is disposed on one side of the concentration device 301, both sides of the concentration device 301 are connected to the mixing tank 1 and the solid-liquid separation device 302 through pipelines, and the bottom end of the solid-liquid separation device 302 is connected to the bottom end of the concentration device 301 through a delivery pump. The concentration device 301 is used to heat and concentrate the mixed sodium carbonate mother liquor, and the solid-liquid separation device 302 is used to separate the mixed sodium carbonate mother liquor into solid and liquid.

[0034] As an implementation method in this embodiment, Figure 5 As shown, the washing unit 4 includes a washing box 401 disposed on one side of the solid-liquid separation device 302, a plurality of filter plates 402 are fixedly connected in the washing box 401, the filter plates 402 are inclined, and nozzles 403 are equidistantly fixedly connected to the rear side of the washing box 401, and the nozzles 403 are all disposed between two adjacent filter plates 402, and the top of the washing box 401 is connected to the solid discharge port of the solid-liquid separation device 302 through a delivery pump. The filter plates 402 inclined in the washing box 401 are used to increase the washing area and the washing effect.

[0035] Working principle: When in use, sodium carbonate mother liquor is mixed with a certain amount of magnesium chloride to react to generate hydrated magnesium carbonate, the hydrated magnesium carbonate slurry is pumped into the concentrator 301, and the temperature is increased to pyrolyze and concentrate, and then the pyrolyzed slurry is passed through the solid-liquid separation device 302 for solid-liquid separation, the separated solid is washed with water through the washing unit 4 to remove water-soluble impurities to obtain a basic magnesium carbonate product, and the separated liquid continues to enter the concentrator 301 for circulation, concentration and separation, thereby realizing the recycling of the sodium carbonate mother liquor, and during the process, no excessive residual saturated solution will be generated, thus avoiding the generation of new mother liquor and improving the utilization efficiency of resources.

[0036] Finally, it should be noted that the above is only 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 can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sodium carbonate mother liquor purification device, comprising a mixing tank (1), characterized in that: It also includes a stirring unit (2), a concentration and separation unit (3) and a washing unit (4); The top of the mixing tank (1) is fixedly connected to a metering box (5), the top of the metering box (5) is fixedly connected to a material inlet (6), the bottom front of the metering box (5) is provided with a material discharge port (7), the bottom rear of the metering box (5) is fixedly connected to an electric push rod (8), the telescopic end of the electric push rod (8) is fixedly connected to a moving plate (9), the front middle of the moving plate (9) is fixedly connected to one end of a push column (10), the other end of the push column (10) is equidistantly fixedly connected to four discharge plates (11), the discharge plates (11) are all slidably connected to the metering box (5), and the reaction medium is fed in equal amounts by means of the discharge plates (11), the upper rear end of the metering box (5) is provided with a slide groove (12), the slide groove (12) is slidably connected to a sealing plate (13), one side of the sealing plate (13) is fixedly connected to the upper front end of the moving plate (9); The stirring unit (2) is used to stir and mix the sodium carbonate mother liquor and the reaction medium magnesium chloride; The concentration and separation unit (3) is used to perform pyrolysis and concentration on the mixed sodium carbonate mother liquor, perform solid-liquid separation on the pyrolyzed sodium carbonate mother liquor, the separated liquid is circulated and re-concentrated, and the solid enters the washing unit (4) for washing; The washing unit (4) is used to wash solid impurities to obtain a recovered carbonate product; The mixing tank (1), the stirring unit (2), the concentration and separation unit (3) and the washing unit (4) are all connected to the mixing tank (1).

2. A sodium carbonate mother liquor purification device according to claim 1, characterized in that: The stirring unit (2) comprises a driving motor (201) fixedly connected to the bottom of the mixing tank (1); the output end of the driving motor (201) passes through the bottom handle of the mixing tank (1) and is fixedly connected to one end of a stirring paddle (202); and a scraping ring (203) is fixedly connected to the outer side of the stirring paddle (202).

3. A sodium carbonate mother liquor purification device according to claim 1, characterized in that: The concentration and separation unit (3) comprises a concentration device (301) arranged on one side of the mixing tank (1), a heating device being arranged inside the concentration device (301), a solid-liquid separation device (302) being arranged on one side of the concentration device (301), both sides of the concentration device (301) being connected to the mixing tank (1) and the solid-liquid separation device (302) respectively through pipelines, and the bottom end of the solid-liquid separation device (302) being connected to the bottom end of the concentration device (301) through a delivery pump.

4. A sodium carbonate mother liquor purification device according to claim 3, characterized in that: The washing unit (4) comprises a washing box (401) arranged on one side of the solid-liquid separation device (302), a plurality of filter plates (402) are fixedly connected inside the washing box (401), the filter plates (402) are arranged obliquely, nozzles (403) are fixedly connected to the rear side of the washing box (401) at equal intervals, and the nozzles (403) are arranged between two adjacent filter plates (402), and the top end of the washing box (401) is connected to the solid discharge port of the solid-liquid separation device (302) through a delivery pump.

5. A sodium carbonate mother liquor purification device according to claim 4, characterized in that: A waste liquid collection box (404) is provided at the bottom end of the washing box (401), and the bottom end of the washing box (401) is connected to the waste liquid collection box (404) via a one-way valve pipe (405).

6. A sodium carbonate mother liquor purification device according to claim 4, characterized in that: A water storage tank (406) is arranged at the rear of the washing box (401), and a water pump is fixedly connected to the bottom wall of the water storage tank (406), and a water outlet of the water pump is connected to the spray head (403) through a pipeline.

7. A sodium carbonate mother liquor purification device according to claim 1, characterized in that: The other side of the mixing tank (1) is fixedly connected with a mother liquid delivery interface (14).

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