Alkali liquor balanced sodium carbonate production system

Abstract

The utility model discloses a soda ash production system with balanced alkali liquor. The alkali liquor balanced sodium carbonate production system comprises a hot alkali liquor tank, a hot alkali liquor pump, a circulating washing tank, a circulating washing liquor pump, an alkali dissolving tank, a sodium carbonate liquor pump and a brine causticizing device, feed liquid in the circulating washing tank is conveyed to the alkali dissolving tank through the circulating washing liquid pump, feed liquid in the alkali dissolving tank is conveyed to the brine causticizing device through the sodium carbonate liquid pump, and feed liquid in the hot alkali liquid pump is conveyed to the circulating washing tank through the hot alkali liquid pump. According to the soda ash production system with the balanced alkali liquor, the problems of caking blockage, alkali liquor expansion and discharge are solved, water can be effectively saved, and the soda ash production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of chemical industry, and specifically relates to a soda ash production system with alkali balance. Background Technology

[0002] Currently, in soda ash production units, both the hot alkali tank in the light ash process and the circulating washing tank in the heavy ash process are replenished with demineralized water. During normal production, the hot alkali solution and washing liquid are mixed with alkali dust in the washing furnace gas and hydrated tail gas, resulting in a high alkali concentration, which reduces the washing effect and causes sodium carbonate to clump in the furnace gas system, leading to blockage and preventing the continuous operation of the production process.

[0003] In the heavy ash process, a portion of the washing liquid from the furnace gas scrubbing circulation is used as hydration water in the hydration machine; another portion, along with the hot alkali solution from the light ash process furnace gas scrubbing, is pumped to the alkali treatment tank via a centrifugal pump. The alkali solution is then pumped to the brine causticizing unit to reduce the calcium content of the causticized brine. When the calcium content of the causticized brine in the brine causticizing unit is low, the amount of alkali solution used is reduced, leading to alkali expansion and discharge. In some production practice cases, the discharge volume is approximately 50% of the daily alkali solution usage, resulting in significant waste of demineralized water and alkali solution, and high water costs in soda ash production. Summary of the Invention

[0004] The main objective of this invention is to provide a soda ash production system with alkali balance, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0006] This utility model provides a soda ash production system with alkali balance, which includes a hot alkali tank, a hot alkali pump, a circulating washing tank, a circulating washing liquid pump, a soda ash dissolving tank, a soda ash pump, and a brine causticizing device; the feed liquid in the circulating washing tank is transported to the soda ash dissolving tank by the circulating washing liquid pump, and the feed liquid in the soda ash dissolving tank is transported to the brine causticizing device by the soda ash pump; the feed liquid in the hot alkali pump is transported to the circulating washing tank by the hot alkali pump.

[0007] Compared with the prior art, the beneficial effects of this utility model include:

[0008] (1) The alkaline balance soda ash production system provided by this utility model, compared with the prior art, changes the process pipeline from the hot alkaline solution of the furnace gas washing in the light ash process to the circulating washing tank of the furnace gas in the heavy ash process for use as chemical water and furnace gas washing. The circulating washing tank of the furnace gas in the heavy ash process can stop adding demineralized water and only use the furnace gas in the light ash process to wash the hot alkaline solution, avoiding the need to replenish the circulating washing tank with demineralized water, increasing the replacement rate of the hot alkaline solution, thereby reducing the concentration of the hot alkaline solution, increasing the washing effect, avoiding the clumping phenomenon, realizing continuous use in the production process, and at the same time stabilizing the alkaline solution concentration and reducing the amount of demineralized water replenishment;

[0009] (2) The alkaline solution balanced soda ash production system provided by this utility model realizes water saving in the desalination of soda ash production and reduces the production cost of soda ash. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This utility model provides a soda ash production system in the prior art;

[0012] Figure 2 This is a typical embodiment of the present invention, which provides a soda ash production system with alkali balance.

[0013] Attached reference numerals: 1-Hot alkali solution tank, 101-Hot alkali solution tank inlet, 102-Hot alkali solution tank outlet, 2-Hot alkali solution pump, 201-Hot alkali solution pump inlet, 202-Hot alkali solution pump outlet, 3-Circulating washing tank, 301-Circulating washing tank inlet, 302-Circulating washing tank outlet, 303-Circulating washing tank replenishment valve, 4-Circulating washing liquid pump, 401-Circulating washing liquid pump inlet, 402-Circulating washing liquid pump outlet, 5-Alkali treatment tank, 501-Alkali treatment tank inlet, 502-Alkali treatment tank outlet, 6-Soda ash solution pump, 601-Soda ash solution pump inlet, 602-Soda ash solution pump outlet, 7-Brine causticizing device. Detailed Implementation

[0014] See Figure 1As shown, a traditional soda ash production system mainly includes a hot soda ash tank 1, a hot soda ash pump 2, a circulating washing tank 3, a circulating washing liquid pump 4, a soda ash dissolving tank 5, a soda ash pump 6, and a brine causticizing device 7. The feed liquid in the hot soda ash tank 1 is transported to the soda ash dissolving tank 5 by the hot soda ash pump 2, and the feed liquid in the circulating washing tank 3 is transported to the soda ash dissolving tank 5 by the circulating washing liquid pump 4. Both the hot soda ash tank 1 and the circulating washing tank 3 are connected to demineralized water through pipelines for replenishment. The feed liquid in the soda ash dissolving tank 5 is transported to the brine causticizing device 7 by the soda ash pump 6.

[0015] As shown in the background of this invention, this implementation method suffers from problems such as clumping and blockage, and expansion and discharge of alkali solution.

[0016] In view of the shortcomings of the prior art, the applicant, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0017] This utility model provides a soda ash production system with alkali balance, which includes a hot alkali tank, a hot alkali pump, a circulating washing tank, a circulating washing liquid pump, a soda ash dissolving tank, a soda ash pump, and a brine causticizing device; the feed liquid in the circulating washing tank is transported to the soda ash dissolving tank by the circulating washing liquid pump, and the feed liquid in the soda ash dissolving tank is transported to the brine causticizing device by the soda ash pump; the feed liquid in the hot alkali pump is transported to the circulating washing tank by the hot alkali pump.

[0018] In some embodiments, the hot alkali solution tank includes a hot alkali solution tank inlet and a hot alkali solution tank outlet, the hot alkali solution pump includes a hot alkali solution pump inlet, a hot alkali solution pump outlet and a circulating washing tank replenishment valve, the hot alkali solution tank inlet is used at least for adding demineralized water, and the hot alkali solution tank outlet is connected to the hot alkali solution pump inlet via a pipeline.

[0019] In some embodiments, the circulating washing tank includes a circulating washing tank inlet and a circulating washing tank outlet, and the hot alkali pump outlet is connected to the circulating washing tank inlet via a pipeline.

[0020] In some implementations, the inner diameter of the pipe connecting the outlet of the hot alkali pump to the inlet of the circulating washing tank is DN100mm.

[0021] In a typical implementation, a DN100 pipeline with a length of 6 meters is directly introduced from the outlet of the hot alkali pump into the inlet of the circulating washing tank, and the replenishment valve of the circulating washing tank is located before the inlet of the circulating washing tank.

[0022] In some implementations, the replenishment valve for the circulating washing tank is located before the inlet of the circulating washing tank, and the inlet of the circulating washing tank is located at the top of the circulating washing tank.

[0023] In some embodiments, the circulating washing liquid pump includes a circulating washing liquid pump inlet and a circulating washing liquid pump outlet, and the circulating washing tank outlet is connected to the circulating washing liquid pump inlet via a pipeline.

[0024] In some implementations, the alkali-refining tank includes an alkali-refining tank inlet and an alkali-refining tank outlet, and the outlet of the circulating washing liquid pump is connected to the alkali-refining tank inlet via a pipeline.

[0025] In some embodiments, the soda ash pump includes a soda ash pump inlet and a soda ash pump outlet, and the outlet of the soda ash tank is connected to the soda ash pump inlet via a pipeline.

[0026] In some implementations, the outlet of the soda ash pump is connected to the brine causticizing device via a pipeline.

[0027] In some embodiments, the alkali-balanced soda ash production system of this application further includes a pre-treatment unit for providing demineralized water, which is delivered into the hot alkali tank only through pipelines.

[0028] In summary, the alkaline solution balanced soda ash production system provided by this utility model prevents clumping and blockage, effectively stabilizes the alkaline solution concentration, reduces the amount of demineralized water replenishment, reduces alkaline solution expansion, saves water, and lowers the production cost of soda ash.

[0029] The following will provide a further explanation of the technical solution, its implementation process, and its principles, in conjunction with the accompanying drawings and specific implementation examples.

[0030] Example

[0031] Please see Figure 2 This utility model provides a soda ash production system with alkali balance, which includes a hot alkali tank 1, a hot alkali pump 2, a circulating washing tank 3, a circulating washing liquid pump 4, an alkali-forming tank 5, a soda ash pump 6, and a brine causticizing device 7.

[0032] The hot alkali solution tank 1 includes a hot alkali solution tank inlet 101 and a hot alkali solution tank outlet 102; the hot alkali solution pump 2 includes a hot alkali solution pump inlet 201 and a hot alkali solution pump outlet 202; the circulating washing tank 3 includes a circulating washing tank inlet 301, a circulating washing tank outlet 302, and a circulating washing tank replenishment valve 303; the circulating washing liquid pump 4 includes a circulating washing liquid pump inlet 401 and a circulating washing liquid pump outlet 402; the alkali dissolving tank 5 includes an alkali dissolving tank inlet 501 and an alkali dissolving tank outlet 502; and the soda ash solution pump 6 includes a soda ash solution pump inlet 601 and a soda ash solution pump outlet 602.

[0033] In this embodiment, the demineralized water in the pre-treatment device is added to the hot alkali tank 1 through the hot alkali tank inlet 101. The hot alkali tank outlet 102 is connected to the hot alkali pump inlet 201 through a pipe. The hot alkali pump outlet 202 is connected to the circulating washing tank inlet 301 through a pipe. The circulating washing tank outlet 202 is connected to the circulating washing liquid pump inlet 401 through a pipe. The circulating washing liquid pump outlet 402 is connected to the alkali-refining tank inlet 501 through a pipe. The washing liquid in the circulating washing tank 3 enters the alkali-refining tank 5 through the alkali-refining tank inlet 501. The alkali-refining tank outlet 502 is connected to the soda ash pump inlet 601 through a pipe. The soda ash pump outlet 602 is connected to the brine causticizing device 7 through a pipe.

[0034] In the soda ash production system provided in this embodiment, the hot alkaline solution for the furnace gas washing in the light ash process is in the hot alkaline solution tank 1, and the washing liquid for the furnace gas circulating washing in the heavy ash process is in the circulating washing tank 2. Only demineralized water needs to be added to the hot alkaline solution tank 1. When the concentration of the hot alkaline solution approaches 60 tt, it is sent to the circulating washing tank 3 via the hot alkaline solution pump 2. The sent hot alkaline solution can be used as the washing liquid in the circulating washing tank 3, with a portion used for hydration water in the hydration machine and another portion used to wash away alkaline dust entrained in the furnace gas. When the concentration of the washing liquid approaches 80 tt, it is transported to the alkali treatment tank 5 via the circulating washing liquid pump 4, and then sent to the brine causticizing device 7 via the soda ash solution pump 6. Simultaneously, demineralized water is added to the hot alkaline solution tank 1 and sent to the circulating washing tank 3 to displace the alkaline solution concentration in the hot alkaline solution tank 1 and the circulating washing tank 3.

[0035] Therefore, the soda ash production system provided in this embodiment eliminates the process of replenishing demineralized water in the circulating washing tank, and can continuously use light ash hot soda ash solution, saving 50% of the daily soda ash consumption; it can also increase the replacement rate of hot soda ash solution, prevent clumping and blockage, stabilize the soda ash concentration, reduce the amount of demineralized water replenishment, solve the problems of soda ash expansion and discharge, effectively save water, and reduce the soda ash production cost.

[0036] Although the present invention has been described with reference to illustrative embodiments, those skilled in the art will understand that various other changes, omissions, and / or additions may be made without departing from the spirit and scope of the present invention, and that elements of the described embodiments may be substituted with substantially equivalents. Furthermore, many modifications may be made without departing from the scope of the present invention to adapt particular situations or materials to the teachings of the present invention. Therefore, the present invention is not intended to be limited to the specific embodiments disclosed for carrying out the present invention, but rather is intended to include all embodiments falling within the scope of the appended claims.

[0037] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A soda ash production system with alkali balance, comprising a hot alkali tank, a hot alkali pump, a circulating washing tank, a circulating washing liquid pump, a soda ash dissolving tank, a soda ash pump, and a brine causticizing device; wherein the feed liquid in the circulating washing tank is transported to the soda ash dissolving tank via the circulating washing liquid pump, and the feed liquid in the soda ash dissolving tank is transported to the brine causticizing device via the soda ash pump; characterized in that, The feed liquid in the hot alkali solution pump is transported to the circulating washing tank through the hot alkali solution pump.

2. The soda ash production system with alkali balance according to claim 1, characterized in that: The hot alkali solution tank includes a hot alkali solution tank inlet and a hot alkali solution tank outlet, and the hot alkali solution pump includes a hot alkali solution pump inlet and a hot alkali solution pump outlet. The hot alkali solution tank inlet is used to add demineralized water at least, and the hot alkali solution tank outlet is connected to the hot alkali solution pump inlet through a pipeline.

3. The soda ash production system with alkali balance according to claim 2, characterized in that: The circulating washing tank includes a circulating washing tank inlet, a circulating washing tank outlet, and a circulating washing tank replenishment valve. The hot alkali pump outlet is connected to the circulating washing tank inlet via a pipeline.

4. The soda ash production system with alkali balance according to claim 3, characterized in that: The inner diameter of the pipe connecting the outlet of the hot alkali pump to the inlet of the circulating washing tank is DN100 mm.

5. The soda ash production system with alkali balance according to claim 3, characterized in that: The replenishment valve of the circulating washing tank is located before the inlet of the circulating washing tank, and the inlet of the circulating washing tank is located at the top of the circulating washing tank.

6. The soda ash production system with alkali balance according to claim 3, characterized in that: The circulating washing liquid pump includes a circulating washing liquid pump inlet and a circulating washing liquid pump outlet, and the circulating washing tank outlet is connected to the circulating washing liquid pump inlet via a pipeline.

7. The soda ash production system with alkali balance according to claim 6, characterized in that: The alkali-resolving tank includes an inlet and an outlet, and the outlet of the circulating washing liquid pump is connected to the inlet of the alkali-resolving tank via a pipeline.

8. The soda ash production system with alkali balance according to claim 7, characterized in that: The soda ash pump includes a soda ash pump inlet and a soda ash pump outlet, and the outlet of the soda ash tank is connected to the soda ash pump inlet via a pipeline.

9. The soda ash production system with alkali balance according to claim 8, characterized in that: The outlet of the soda ash pump is connected to the brine causticizing device via a pipeline.

10. The soda ash production system with alkali balance according to claim 1, characterized in that: It also includes a pre-treatment device for providing demineralized water, which is delivered into the hot alkali tank only through a pipeline.

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