Aeration system and desulfurization system having the same

Abstract

The utility model provides an aeration system and a desulfurization system having the same, the aeration system comprising: a liquid storage component having a storage space centrifuge for storing ammonium sulfate mother liquor after centrifugal separation by a centrifuge; an aeration tank connected to the storage space, the aeration tank having a storage opening located at the top of the aeration tank; a defoaming mechanism comprising a scraper, the scraper being movably arranged at the storage opening; a first detection component for detecting the density of the ammonium sulfate mother liquor in the storage space; a liquid replenishment component comprising a liquid replenishment pipe and a liquid replenishment drive component, the liquid replenishment drive component being arranged on the liquid replenishment pipe, the liquid replenishment pipe being connected to the liquid storage component, and the liquid replenishment drive component controlling the operating state of the liquid replenishment drive component according to the detection result of the first detection component. The utility model solves the problem of poor product quality of ammonium sulfate produced by the ammonia desulfurization system in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to an aeration system and a desulfurization system having the same. Background Art

[0002] As the leading device in the coal chemical industry, the large-scale coal chemical coal-fired thermal power plant is the basic supporting facility for the indirect liquefaction project. It provides stable thermal power and electricity for various chemical process units, and undertakes important functions such as factory high-pressure steam production, steam system operation and regulation, main steam power generation, waste heat power generation, boiler feed water deoxygenation and supply.

[0003] The coal chemical coal-fired thermal power station device includes a pulverized coal furnace. In the process of burning pulverized coal or coal, the pulverized coal furnace mainly fully burns the fuel coal at high temperature and high pressure to generate heat energy and steam, so that the heat energy and steam generate electricity. In addition, in the process of burning pulverized coal or coal in the pulverized coal furnace, high-temperature flue gas containing SO2 is generated. The high-temperature flue gas containing SO2 is passed into the desulfurization tower, and liquid ammonia absorbent is sprayed to the high-temperature flue gas containing SO2 in the desulfurization tower through a spray structure, so that an absorption chemical reaction is carried out in the closed desulfurization tower. After the flue gas is washed and purified by the absorption chemical reaction, it is discharged through a high chimney. The ammonium sulfate slurry formed at the bottom of the desulfurization tower is concentrated at high temperature by the flue gas waste heat to produce ammonium sulfate crystals, which are transported to the separation drying and packaging system to produce ammonium sulfate products. The above-mentioned desulfurization tower, spray structure drying and packaging system, etc. constitute an ammonia desulfurization system. The above-mentioned ammonia desulfurization system has high absorption efficiency, fast reaction speed, high absorption utilization rate, and a desulfurization efficiency of more than 99%. The pollutant SO2 in coal-fired boilers can be recycled into high-value-added nitrogen fertilizer (ammonium sulfate product), which has a good market prospect, does not produce wastewater, and has no secondary pollution, truly turning waste into treasure.

[0004] Among them, ammonium sulfate slurry is the most important conversion medium in the ammonia desulfurization system. The ammonium sulfate particles produced by the saturated crystallization of ammonium sulfate slurry are small, which is not conducive to the long-term stable production of ammonium sulfate products and affects environmental protection indicators.

[0005] However, no waste water is generated during the entire production process of the ammonia desulfurization system. A long-term closed-loop discharge is carried out in the ammonia desulfurization system. The high-temperature flue gas of SO2 is sprayed and precipitated by the liquid ammonia absorbent to form ammonium sulfate slurry, and the ammonium sulfate slurry forms ammonium sulfate crystals. The ammonium sulfate crystals are centrifuged in a centrifuge to produce a liquid that foams and turns black, and contains a large amount of oil stains, which affect the crystallization of the ammonium sulfate slurry and the particles become finer, thereby affecting the product quality of ammonium sulfate. Utility Model Content

[0006] The main purpose of the utility model is to provide an aeration system and a desulfurization system having the same, so as to solve the problem of poor product quality of ammonium sulfate produced by the ammonia desulfurization system in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, an aeration system is provided, comprising: a liquid storage component, having a storage space, the storage space being used to store ammonium sulfate mother liquor after centrifugal separation by a centrifuge; an aeration tank, the aeration tank being connected to the storage space so as to introduce ammonium sulfate mother liquor into the aeration tank, the aeration tank having a storage opening, the storage opening being located at the top of the aeration tank; a defoaming mechanism, comprising a scraper, the scraper being movably arranged at the storage opening so as to scrape off the oil foam floating layer on the top of the aeration tank; a first detection component, being used to detect the density of the ammonium sulfate mother liquor in the storage space; a liquid replenishment component, comprising a liquid replenishment tube and a liquid replenishment drive component, the liquid replenishment drive component being arranged on the liquid replenishment tube, the liquid replenishment tube being connected to the liquid storage component, the liquid replenishment drive component controlling the operating state of the liquid replenishment drive component according to the detection result of the first detection component so as to replenish liquid into the storage space of the liquid storage component.

[0008] Furthermore, the liquid storage component includes: multiple liquid storage tanks, each of which has a storage space, multiple first detection components, and the multiple first detection components are arranged in a one-to-one correspondence with the multiple liquid storage tanks to respectively detect the density of the ammonium sulfate mother liquor in the multiple liquid storage tanks; the liquid infusion pipe includes multiple liquid infusion branch pipes, multiple liquid infusion drive components, and the multiple liquid infusion branch pipes and the multiple liquid infusion drive components are arranged in a one-to-one correspondence, and the multiple water infusion drive components are connected to the multiple first detection components in a one-to-one correspondence.

[0009] Furthermore, the aeration system includes: a connecting pipe group, the aeration tank and the storage space are connected through the connecting pipe group; a first control valve, the first control valve is arranged on the connecting pipe group, and the first control valve is connected to the first detection component to control the opening and closing of the first control valve according to the detection result of the first detection component.

[0010] Furthermore, the connecting pipe group includes: a connecting main pipe, which is connected to the aeration tank; a first connecting branch pipe, one end of the first connecting branch pipe is connected to the side wall below the storage space, and the other end of the first connecting branch pipe is connected to the connecting main pipe, and the first control valve is arranged on the first connecting branch pipe; a second connecting branch pipe, one end of the second connecting branch pipe is connected to the side wall above the storage space, and the other end of the second connecting branch pipe is connected to the connecting main pipe, and the second connecting branch pipe is used to communicate with the ditch to discharge part of the ammonium sulfate mother liquor.

[0011] Furthermore, the aeration system further comprises: a second control valve, which is arranged on the connecting main pipe and connected to the first detection component to control the opening and closing of the second control valve according to the detection result of the first detection component.

[0012] Furthermore, the aeration system also includes: a second detection component, which is arranged in the storage space to detect the liquid level of the ammonium sulfate mother liquor in the storage space; wherein the second detection component is respectively connected to the first control valve and the second control valve to control the opening and closing of the first control valve and the second control valve according to the detection result of the second detection component.

[0013] Furthermore, the liquid storage assembly includes: a stirring structure, which is arranged in the storage space, and the stirring structure includes a stirring paddle and a stirring driving component, and the stirring driving component is used to drive the stirring paddle to rotate so that the stirring paddle stirs the ammonium sulfate mother liquor in the storage space.

[0014] Furthermore, the ventilation pipe group includes a ventilation main pipe and multiple ventilation branch pipes, the ventilation main pipe is respectively connected to the multiple ventilation branch pipes, the multiple ventilation branch pipes are located at the bottom of the aeration tank, each ventilation branch pipe has multiple air outlets, and the multiple air outlets ventilate the ammonium sulfate mother liquor in the aeration tank.

[0015] Furthermore, the aeration tank has a collection space, which is located on one side of the storage space, and the collection space has a collection opening; the defoaming mechanism includes: a mounting structure, which is mounted at the storage opening; a defoaming driving component, which is mounted on the mounting structure; a driving wheel, the defoaming driving component is drivingly connected to the driving wheel, and the driving wheel is rotatably arranged on the mounting structure; a transmission wheel and a transmission bar, the transmission bar is a transmission belt or a transmission chain, the transmission bar is wound around the driving wheel and the transmission wheel, so as to drive the movement of the transmission bar and the transmission wheel through the rotation of the driving wheel; wherein, there are multiple scrapers, and the multiple scrapers are all connected to the transmission bar, and the multiple scrapers are spaced along the movement direction of the transmission bar, so as to drive the multiple scrapers to move through the movement of the transmission bar; wherein, the transmission bar extends to the collection space, so that when the scraper moves to the collection space, the scraper scrapes the oil foam floating layer into the collection space through the collection opening.

[0016] Furthermore, the aeration system also includes: a discharge structure, including a discharge pipe and a discharge valve, one end of the discharge pipe is connected to the aeration tank and is located below the collection space, and the discharge valve is arranged on the discharge pipe; a transport component, including a transport vehicle and a transport bucket arranged on the transport vehicle, and the transport bucket is connected to the collection space to transport the oil foam floating layer in the collection space to the transport bucket.

[0017] According to another aspect of the utility model, a desulfurization system is provided, comprising the above-mentioned aeration system; a desulfurization tower, the desulfurization tower is connected to a liquid storage component of the aeration system through a reflux pipe to transport the liquid in the liquid storage component back to the desulfurization tower; a centrifuge, the centrifuge is connected to the desulfurization tower to receive the ammonium sulfate slurry formed in the desulfurization tower, and the centrifuge is connected to the liquid storage component of the aeration system; a drive pump, the drive pump is arranged on the reflux pipe to drive the ammonium sulfate mother liquor to reflux into the desulfurization tower through the reflux pipe; wherein the drive pump is connected to a first detection component of the aeration system to control the operating state of the drive pump according to the detection result of the first detection component.

[0018] The technical scheme of the utility model is applied, and the utility model provides an aeration system and a desulfurization system having the same, wherein the aeration system comprises: a liquid storage component, which has a storage space, and the storage space is used to store ammonium sulfate mother liquor after centrifugal separation by a centrifuge; an aeration tank, which is connected to the storage space so as to introduce ammonium sulfate mother liquor into the aeration tank, and the aeration tank has a storage opening, and the storage opening is located at the top of the aeration tank; a defoaming mechanism, which comprises a scraper, and the scraper is movably arranged at the storage opening so as to scrape off the oil foam floating layer on the top of the aeration tank; a first detection component, which is used to detect the density of the ammonium sulfate mother liquor in the storage space; a liquid replenishment component, which comprises a liquid replenishment pipe and a liquid replenishment drive component, and the liquid replenishment drive component is arranged on the liquid replenishment pipe, and the liquid replenishment pipe is connected to the liquid storage component, and the liquid replenishment drive component is connected to the first detection component, so as to control the running state of the liquid replenishment drive component according to the detection result of the first detection component, so as to replenish liquid into the storage space of the liquid storage component. Through the above arrangement, the density of the ammonium sulfate mother liquor in the liquid storage component can be guaranteed before it flows into the aeration tank. In this way, the density of the ammonium sulfate mother liquor entering the aeration tank can be prevented from being too high, so as to ensure that the impurities in the ammonium sulfate mother liquor in the aeration tank can float on the top of the aeration tank, so as to facilitate the scraper of the defoaming mechanism to scrape off the impurities on the top of the aeration tank, thereby improving the reliability of the defoaming of the aeration system, and further improving the product quality of ammonium sulfate produced by the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 shows an overall structural schematic diagram of an embodiment of an aeration system according to the utility model; and

[0021] Figure 2 The schematic diagram shows a structure in which a discharge structure of an aeration system according to an embodiment of the utility model is arranged on an aeration tank.

[0022] The above drawings include the following reference numerals:

[0023] 1. liquid storage component; 100. storage space; 11. liquid storage tank;

[0024] 2. Aeration tank; 200. Storage opening; 201. Collection space; 202. Collection opening;

[0025] 3. Defoaming mechanism; 30. Scraper;

[0026] 4. Connecting pipe group; 5. First control valve; 40. Connecting main pipe; 41. First connecting branch pipe; 42. Second connecting branch pipe; 6. Second control valve; 7. Stirring structure; 70. Stirring paddle; 71. Stirring drive component; 8. Ventilation pipe group; 80. Ventilation main pipe; 81. Ventilation branch pipe; 810. Air outlet; 9. Discharge structure; 90. Discharge pipe; 91. Discharge valve; 10. Transport assembly; 110. Transport vehicle; 120. Transport barrel; 130. Collecting box; 12. Desulfurization tower; 121. Secondary spray pipe; 13. Centrifuge; 14. Reflux pipe; 140. Drive pump; 15. Buffer tank; 16. Rehydration assembly; 160. Rehydration pipe; 161. Rehydration drive component; 17. Chimney; 18. Delivery pipe; 180. Feed pump; 19. Fourth control valve. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Please refer to Figure 1 and Figure 2The utility model provides an aeration system, comprising: a liquid storage component 1, having a storage space 100, the storage space 100 is used to store the ammonium sulfate mother liquor after centrifugal separation by a centrifuge 13; an aeration tank 2, the aeration tank 2 is connected to the storage space 100, so as to introduce the ammonium sulfate mother liquor into the aeration tank 2, the aeration tank 2 has a storage opening 200, and the storage opening 200 is located at the top of the aeration tank 2; a defoaming mechanism 3, comprising a scraper 30, the scraper 30 is movably arranged at the storage opening 200, so as to scrape the aeration mother liquor. The oil foam floating layer on the top of the pool 2; the first detection component is used to detect the density of the ammonium sulfate mother liquor in the storage space 100; the liquid replenishment component 16, including a liquid replenishment tube 160 and a liquid replenishment drive component 161, the liquid replenishment drive component 161 is arranged on the liquid replenishment tube 160, the liquid replenishment tube 160 is connected to the liquid storage component 1, and the liquid replenishment drive component 161 is connected to the first detection component to control the operating state of the liquid replenishment drive component 161 according to the detection result of the first detection component, so as to replenish liquid into the storage space 100 of the liquid storage component 1. Through the above arrangement, the density of the ammonium sulfate mother liquor in the liquid storage component 1 can be ensured before it flows into the aeration tank 2. In this way, the density of the ammonium sulfate mother liquor entering the aeration tank 2 can be prevented from being too high, so as to ensure that the impurities in the ammonium sulfate mother liquor in the aeration tank 2 can float on the top of the aeration tank 2, so as to facilitate the scraper 30 of the defoaming mechanism 3 to scrape off the impurities on the top of the aeration tank 2, thereby improving the reliability of the defoaming of the aeration system, and further improving the product quality of ammonium sulfate produced by the desulfurization system.

[0029] Due to the addition of oil to assist combustion at the initial stage of boiler startup and the presence of a large amount of impurities such as fly ash and residual carbon in the flue gas, a large amount of foam exists in the ammonium sulfate slurry after it enters the desulfurization system and circulates in contact with the absorption liquid. After being transported to the ammonium sulfate preparation system for centrifugal separation, the foam in the ammonium sulfate mother liquor needs to be regularly removed and purified by a defoaming mechanism and then returned to the desulfurization system to improve the quality of the sulfuric acid product of the desulfurization device.

[0030] Specifically, the first detection component is a portable density meter to detect the density of the ammonium sulfate mother liquor in the multiple storage tanks 11; and manual sampling is responsible for detecting the density of the slurry in the storage tanks.

[0031] In the present application, the liquid storage component 1 includes: a plurality of liquid storage tanks 11, each of which has a storage space 100, a plurality of first detection components, and the plurality of first detection components and the plurality of liquid storage tanks 11 are arranged one-to-one to respectively detect the density of the ammonium sulfate mother solution in the plurality of liquid storage tanks 11; a liquid replenishment pipe 160 includes a plurality of liquid replenishment branch pipes, a plurality of liquid replenishment drive components 161, and the plurality of liquid replenishment branch pipes and the plurality of liquid replenishment drive components 161 are arranged one-to-one, and the plurality of liquid replenishment drive components 161 are connected one-to-one with the plurality of first detection components. By arranging a plurality of liquid storage tanks 11, the storage space of the ammonium sulfate mother solution can be increased, and the reliability of the aeration system during operation can be ensured.

[0032] Specifically, the aeration system includes: a connecting pipe group 4, through which the aeration tank 2 is connected to the storage space 100; and a first control valve 5, which is arranged on the connecting pipe group 4 and connected to the first detection component to control the opening and closing of the first control valve 5 according to the detection result of the first detection component. Through the above arrangement, when the first detection component detects that the density of the ammonium sulfate mother liquor in the storage space 100 is relatively high, the first control valve 5 is controlled to be closed, which can prevent the ammonium sulfate mother liquor with relatively high density from flowing into the aeration tank, so that the impurities in the ammonium sulfate mother liquor in the aeration tank can be further ensured to float up, and when the storage space 100 needs to be emptied, the first control valve 5 is controlled to be opened.

[0033] Specifically, the connecting pipe group 4 includes: a connecting main pipe 40, which is connected to the aeration tank 2; a first connecting branch pipe 41, one end of the first connecting branch pipe 41 is connected to the side wall below the storage space 100, and the other end of the first connecting branch pipe 41 is connected to the connecting main pipe 40, and the first control valve 5 is arranged on the first connecting branch pipe 41; a second connecting branch pipe 42, one end of the second connecting branch pipe 42 is connected to the side wall above the storage space 100, and the other end of the second connecting branch pipe 42 is connected to the connecting main pipe 40, and the second connecting branch pipe 42 is used to communicate with the ditch to discharge part of the ammonium sulfate mother liquor.

[0034] In the present application, the ammonium sulfate mother liquor is collected by the second connecting branch pipe 42 and temporarily stored in the ditch. In addition, the aeration system of the present application also includes a pit pump, which is arranged at the outlet of the ditch and can transport the ammonium sulfate mother liquor to the storage tank 11 through the pit pump.

[0035] Optionally, after the liquid level in the liquid storage tank 11 reaches a certain level, the ammonium sulfate mother liquor in the ditch can be transported to the liquid storage tank 11 .

[0036] Specifically, the first connecting branch pipe 41 is a discharge pipeline and valve at the bottom of the liquid storage tank, which is used to drain the internal slurry when the liquid storage tank is handed over for inspection. The second connecting branch pipe 42 is an overflow pipeline, which overflows to the ditch or overflow aeration tank for temporary collection when the liquid level in the liquid storage tank rises to a certain height.

[0037] In the present application, the aeration system further includes: a second control valve 6, which is arranged on the connecting main pipe 40, and is connected to the first detection component to control the opening and closing of the second control valve 6 according to the detection result of the first detection component. In this way, the opening and closing of the first control valve 5 and the opening and closing of the second control valve 6 are respectively controlled according to the detection result of the first detection component, thereby further preventing the ammonium sulfate mother liquor with a higher density from flowing into the aeration tank.

[0038] In the present application, the aeration system further includes: a second detection component, which is arranged in the storage space 100 to detect the liquid level of the ammonium sulfate mother solution in the storage space 100; wherein the second detection component is connected to the first control valve 5 and the second control valve 6 respectively to control the opening and closing of the first control valve 5 and the second control valve 6 according to the detection result of the second detection component. Through the above arrangement, the liquid in the storage space 100 can be prevented from overflowing, thereby ensuring the reliability of the operation of the aeration system.

[0039] Specifically, the second detection component is a liquid level meter.

[0040] In the present application, the liquid storage assembly 1 includes: a stirring structure 7, which is arranged in the storage space 100, and the stirring structure 7 includes a stirring paddle 70 and a stirring driving component 71, and the stirring driving component 71 is used to drive the stirring paddle 70 to rotate so that the stirring paddle 70 stirs the ammonium sulfate mother liquor in the storage space 100. Through the setting of the stirring structure 7, the ammonium sulfate mother liquor in the storage space 100 can be stirred evenly to ensure the detection accuracy of the first detection component, so that the density detected by the first detection component is accurate.

[0041] In the present application, the ventilation pipe group 8 includes a ventilation main pipe 80 and a plurality of ventilation branch pipes 81, the ventilation main pipe 80 is respectively connected to the plurality of ventilation branch pipes 81, the plurality of ventilation branch pipes 81 are located at the bottom of the aeration tank 2, each ventilation branch pipe 81 has a plurality of air outlets 810, and the plurality of air outlets 810 ventilate the ammonium sulfate mother liquor in the aeration tank 2. The plurality of ventilation branch pipes 81 and the plurality of air outlets 810 on each ventilation branch pipe 81 can improve the uniformity of ventilation in the aeration tank.

[0042] Specifically, the bottom wall of the aeration tank is a rectangular structure, and multiple ventilation branch pipes 81 are arranged at intervals along the width direction of the bottom wall. Each ventilation branch pipe 81 extends along the length direction of the bottom wall, and multiple air outlets 810 on each ventilation branch pipe 81 are arranged at intervals along the length direction of the ventilation branch pipe.

[0043] In the embodiment of the present application, there are two ventilation branch pipes 81 .

[0044] Specifically, a third control valve is provided on the ventilation main pipe 80, a third detection component is provided in the aeration tank, the third detection component is used to detect the liquid level in the aeration tank, and the third detection component is connected to the third control valve to control the opening and closing of the third control valve according to the detection result of the third detection component. In this way, the defoaming mechanism can be reliable in defoaming.

[0045] In order to realize the movement of the scraper 30, the aeration tank 2 has a collection space 201, the collection space 201 is located on one side of the storage space 100, and the collection space 201 has a collection opening 202; the defoaming mechanism 3 includes: a mounting structure, mounted at the storage opening 200; a defoaming driving component, mounted on the mounting structure; a driving wheel, the defoaming driving component is drivingly connected to the driving wheel, and the driving wheel is rotatably arranged on the mounting structure; a transmission wheel and a transmission bar, the transmission bar is a transmission belt or a transmission chain, the transmission bar is wound around the driving wheel and the transmission wheel to drive the movement of the transmission bar and the transmission wheel through the rotation of the driving wheel; wherein there are multiple scrapers, the multiple scrapers are all connected to the transmission bar, and the multiple scrapers are spaced along the movement direction of the transmission bar to drive the multiple scrapers to move through the movement of the transmission bar; wherein the transmission bar extends to the collection space 201, so that when the scraper moves to the collection space 201, the scraper scrapes the oil foam floating layer into the collection space 201 through the collection opening. By setting up the collecting space 201, the impurities floating in the aeration tank can be collected in time, which is convenient for the subsequent processes.

[0046] In the present application, the defoaming driving component is a driving motor.

[0047] In the present application, there are multiple scrapers 30, and the multiple scrapers are arranged at intervals along the moving direction of the transmission chain.

[0048] In the embodiment of the present application, there are two scrapers 30, which are respectively located at both ends of the transmission bar, so that when one scraper 30 contacts the impurities on the top of the liquid in the aeration tank, the other scraper 30 is located on the side of the transmission bar away from the aeration tank 2.

[0049] Specifically, the mounting structure includes a mounting beam, which is arranged above the aeration tank, and the defoaming driving component is mounted on the mounting beam.

[0050] Specifically, the mounting beam is a mounting steel beam.

[0051] In the present application, the aeration system further includes: a discharge structure 9, including a discharge pipe 90 and a discharge valve 91, one end of the discharge pipe 90 is connected to the aeration tank 2 and is located below the collection space 201, and the discharge valve 91 is arranged on the discharge pipe 90; a transport assembly 10, including a transport vehicle 110 and a transport bucket 120 arranged on the transport vehicle 110, and the transport bucket 120 is connected to the collection space 201 to transport the oil foam floating layer in the collection space 201 to the transport bucket 120. By setting the discharge structure 9, the overflow of the liquid in the aeration tank can be prevented, thereby improving the reliability of the use of the aeration system, and by setting the transport assembly 10, the transportation of the oil foam floating layer is facilitated.

[0052] Specifically, the aeration system further includes a collecting box 130, which is located between the aeration tank 2 and the transport assembly 10. The collecting box 130 is connected to the collecting space 201 to temporarily store impurities (oil foam floating layer) in the collecting space 201 into the collecting box 130, thereby increasing the temporary storage space for impurities.

[0053] The utility model also provides a desulfurization system, comprising: the above-mentioned aeration system; a desulfurization tower 12, the desulfurization tower 12 is connected to the liquid storage component 1 of the aeration system through a reflux pipe 14, so as to transport the liquid in the liquid storage component 1 back to the desulfurization tower 12; a centrifuge 13, the centrifuge 13 is connected to the desulfurization tower 12 to receive the ammonium sulfate slurry formed in the desulfurization tower 12, and the centrifuge 13 is communicated with the liquid storage component 1 of the aeration system; a driving pump 140, the driving pump 140 is arranged on the reflux pipe 14, so as to drive the ammonium sulfate mother liquor to reflux into the desulfurization tower 12 through the reflux pipe 14; wherein the driving pump 140 is related to the first detection component of the aeration system, so as to control the operating state of the driving pump 140 according to the detection result of the first detection component, so as to facilitate the circulation of the ammonium sulfate mother liquor in the aeration system.

[0054] Specifically, the desulfurization tower is used to be connected to the chimney 17 so as to discharge the boiler flue gas desulfurized by the desulfurization tower into the chimney 17 .

[0055] In the present application, the desulfurization system includes a cyclone, and the liquid replenishment driving component 161 of the aeration system of the present application is a cyclone.

[0056] In the specific implementation process of this application:

[0057] (1) Stop the driving pump 140, start the cyclone to feed the driving pump 140 and replenish the liquid in the liquid storage tank, measure the density of the ammonium sulfate mother liquid in the liquid storage tank every 2 hours, and control the density of the ammonium sulfate mother liquid in the liquid storage tank at 1.245 g / cm 3 Keep the ammonium sulfate mother liquor free of crystals.

[0058] (2) Observe the liquid level in the liquid storage tank through a liquid level gauge. When the liquid level in the liquid storage tank is ≥5.0 m, start the drive pump 140.

[0059] (3) According to the rising speed of the liquid level in the liquid storage tank, the operating frequency of the driving pump 140 to return the liquid is increased.

[0060] (4) When the liquid level in the liquid storage tank reaches 5.3 m and the liquid storage tank overflows, the operating frequency of the liquid return drive pump 140 is stabilized within a preset range.

[0061] (5) When the liquid storage tank overflows, the overflow pipe (second connecting branch pipe 42) of the liquid storage tank is opened to the fourth control valve 19 of the aeration tank, and the first control valve 5 is closed. When the liquid storage tank reaches the overflow level, the overflow pipe overflows automatically, and the second control valve 6 of the aeration tank is opened to drain the overflow liquid to the aeration tank. The first control valve is normally closed.

[0062] (6) Observe the rise of the liquid level in the aeration tank. When the liquid level in the aeration tank reaches 1.0 m, open the factory air valve (the third control valve) twice according to the slurry disturbance and observe the aeration situation. After 5 minutes, slowly open the valve (the third control valve) twice again to maintain a stable bubbling state in the aeration tank according to the liquid level and aeration situation in the aeration tank.

[0063] (7) When the aeration tank liquid level overflows, close the valve from the storage tank overflow pipe to the aeration tank. After 20 minutes of factory wind disturbance, observe the oil foam precipitation in the aeration tank. When a large amount of oil foam floats in the aeration tank, start the defoaming mechanism.

[0064] (8) When all the oil foam floating layer in the aeration tank is scraped to the collection box, close the factory air manual valve, stop the defoaming mechanism, and at the same time, transport the oil foam in the collection box to the ash bin through the loader and mix with the slag and take it away.

[0065] (9) Open the bottom drain valve to drain the remaining slurry in the aeration tank to the pit (ditch), and then pump it to the desulfurization system for consumption. After the oil foam in the aeration tank slurry is completely removed, the remaining slurry will no longer precipitate foam and can be discharged to the ditch through the bottom drain valve of the aeration tank to be temporarily stored in the pit adjacent to the desulfurization system. The pit is connected to the desulfurization system so that the slurry in the pit can be recovered and consumed by the desulfurization system.

[0066] (10) Connect the process water pipe to flush the inside of the aeration tank.

[0067] Specifically, the desulfurization system also includes a buffer tank 15, which is arranged between the desulfurization tower 12 and the liquid replenishing component 16 to play a temporary storage role and improve the reliability of the entire system; wherein, a feeding pump 180 is provided on the conveying pipe 18 between the buffer tank 15 and the liquid replenishing component 16 to provide driving force through the feeding pump 180.

[0068] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0069] The utility model provides an aeration system and a desulfurization system having the same. The aeration system comprises: a liquid storage component 1, having a storage space 100, the storage space 100 is used to store ammonium sulfate mother liquor after centrifugal separation by a centrifuge 13; an aeration tank 2, the aeration tank 2 is connected with the storage space 100, so as to introduce the ammonium sulfate mother liquor into the aeration tank 2, the aeration tank 2 has a storage opening 200, and the storage opening 200 is located at the top of the aeration tank 2; a defoaming mechanism 3, comprising a scraper 30, the scraper 30 is movably arranged at the storage opening 200, so as to scrape off the oil foam floating layer on the top of the aeration tank 2; a first detection component is used to detect the density of the ammonium sulfate mother liquor; a liquid replenishment component 16, comprising a liquid replenishment pipe 160 and a liquid replenishment driving component 161, the liquid replenishment driving component 161 is arranged on the liquid replenishment pipe 160, and the liquid replenishment pipe 160 is connected with the liquid storage component 1, so as to control the running state of the liquid replenishment driving component 161 according to the detection result of the first detection component, so as to replenish liquid into the storage space 100 of the liquid storage component 1. Through the above arrangement, the density of the ammonium sulfate mother liquor in the liquid storage component 1 can be ensured before it flows into the aeration tank 2. In this way, the density of the ammonium sulfate mother liquor entering the aeration tank 2 can be prevented from being too high, so as to ensure that the impurities in the ammonium sulfate mother liquor in the aeration tank 2 can float on the top of the aeration tank 2, so as to facilitate the scraper 30 of the defoaming mechanism 3 to scrape off the impurities on the top of the aeration tank 2, thereby improving the reliability of the defoaming of the aeration system, and further improving the product quality of ammonium sulfate produced by the desulfurization system.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An aeration system, characterized in that: include: A liquid storage component (1) having a storage space (100), wherein the storage space (100) is used to store the ammonium sulfate mother liquor after centrifugation in the centrifuge (13); an aeration tank (2), the aeration tank (2) being in communication with the storage space (100) so as to allow the ammonium sulfate mother liquor to be introduced into the aeration tank (2), the aeration tank (2) having a storage opening (200), the storage opening (200) being located at the top of the aeration tank (2); A defoaming mechanism (3) comprising a scraper (30), wherein the scraper (30) is movably arranged at the storage opening (200) to scrape off the oil foam floating layer on the top of the aeration tank (2); a first detection component, used to detect the density of the ammonium sulfate mother liquid in the storage space (100); A fluid infusion component (16) comprises a fluid infusion tube (160) and a fluid infusion drive component (161), wherein the fluid infusion drive component (161) is arranged on the fluid infusion tube (160), the fluid infusion tube (160) is connected to the fluid storage component (1), and the fluid infusion drive component (161) is connected to the first detection component to control the operating state of the fluid infusion drive component (161) according to the detection result of the first detection component, so as to infuse fluid into the storage space (100) of the fluid storage component (1).

2. The aeration system according to claim 1, characterized in that: The liquid storage component (1) comprises: A plurality of liquid storage tanks (11), each of the liquid storage tanks (11) having the storage space (100); a plurality of first detection components, and the plurality of first detection components and the plurality of liquid storage tanks (11) are arranged in a one-to-one correspondence to each other, so as to respectively detect the density of the ammonium sulfate mother solution in the plurality of liquid storage tanks (11); The fluid infusion tube (160) includes a plurality of fluid infusion branch tubes, and the plurality of fluid infusion drive components (161) are arranged in a one-to-one correspondence with the plurality of fluid infusion drive components (161), and the plurality of fluid infusion drive components (161) are connected in a one-to-one correspondence with the plurality of first detection components.

3. The aeration system according to claim 1, characterized in that: The aeration system comprises: A connecting pipe group (4), the aeration tank (2) and the storage space (100) are connected through the connecting pipe group (4); A first control valve (5), wherein the first control valve (5) is arranged on the connecting pipe group (4), and the first control valve (5) is connected to the first detection component to control the opening and closing of the first control valve (5) according to the detection result of the first detection component.

4. The aeration system according to claim 3, characterized in that: The connecting pipe group (4) comprises: A connecting pipe (40), the connecting pipe (40) being connected to the aeration tank (2); a first communication branch pipe (41), one end of the first communication branch pipe (41) being connected to the side wall below the storage space (100), the other end of the first communication branch pipe (41) being connected to the communication main pipe (40), and the first control valve (5) being arranged on the first communication branch pipe (41); A second connecting branch pipe (42), one end of the second connecting branch pipe (42) is connected to the upper side wall of the storage space (100), and the other end of the second connecting branch pipe (42) is connected to the connecting main pipe (40). The second connecting branch pipe (42) is used to communicate with the ditch to discharge part of the ammonium sulfate mother liquor.

5. The aeration system according to claim 4, characterized in that: The aeration system also includes: A second control valve (6), the second control valve (6) is arranged on the connecting main pipe (40), and the second control valve (6) is connected to the first detection component to control the opening and closing of the second control valve (6) according to the detection result of the first detection component.

6. The aeration system according to claim 5, characterized in that: The aeration system also includes: a second detection component, the second detection component being arranged in the storage space (100) to detect the liquid level of the ammonium sulfate mother liquid in the storage space (100); The second detection component is connected to the first control valve (5) and the second control valve (6) respectively, so as to control the opening and closing of the first control valve (5) and the second control valve (6) according to the detection result of the second detection component.

7. The aeration system according to any one of claims 1 to 6, characterized in that: The liquid storage component (1) comprises: A stirring structure (7) is arranged in the storage space (100), and the stirring structure (7) comprises a stirring paddle (70) and a stirring driving component (71), wherein the stirring driving component (71) is used to drive the stirring paddle (70) to rotate so that the stirring paddle (70) stirs the ammonium sulfate mother liquor in the storage space (100).

8. The aeration system according to any one of claims 1 to 6, characterized in that: The ventilation pipe group (8) comprises a ventilation main pipe (80) and a plurality of ventilation branch pipes (81), wherein the ventilation main pipe (80) is respectively connected to the plurality of ventilation branch pipes (81), the plurality of ventilation branch pipes (81) are located at the bottom of the aeration tank (2), and each of the ventilation branch pipes (81) has a plurality of air outlets (810), and the plurality of air outlets (810) are used to ventilate the ammonium sulfate mother liquor in the aeration tank (2).

9. The aeration system according to any one of claims 1 to 6, characterized in that: The aeration tank (2) has a collection space (201), the collection space (201) is located on one side of the storage space (100), and the collection space (201) has a collection opening (202); The defoaming mechanism (3) comprises: A mounting structure mounted at the storage opening (200); A defoaming driving component is mounted on the mounting structure; A driving wheel, the defoaming driving component is drivingly connected to the driving wheel, and the driving wheel is rotatably arranged on the mounting structure; A transmission wheel and a transmission bar, wherein the transmission bar is a transmission belt or a transmission chain, and the transmission bar is wound around the driving wheel and the transmission wheel to drive the movement of the transmission bar and the transmission wheel through the rotation of the driving wheel; There are multiple scrapers, all of which are connected to the transmission bar, and the multiple scrapers are arranged at intervals along the movement direction of the transmission bar, so that the movement of the transmission bar drives the multiple scrapers to move; The transmission bar extends to the collection space (201), so that when the scraper moves to the collection space (201), the scraper scrapes the oil foam layer into the collection space (201) through the collection opening.

10. The aeration system according to claim 9, characterized in that: The aeration system also includes: A discharge structure (9), comprising a discharge pipe (90) and a discharge valve (91), wherein one end of the discharge pipe (90) is connected to the aeration tank (2) and is located below the collection space (201), and the discharge valve (91) is arranged on the discharge pipe (90); A transport assembly (10) comprises a transport vehicle (110) and a transport bucket (120) arranged on the transport vehicle (110); the transport bucket (120) is connected to the collection space (201) so as to transport the oil foam floating layer in the collection space (201) into the transport bucket (120).

11. A desulfurization system, characterized in that: include: The aeration system according to any one of claims 1 to 10; A desulfurization tower (12), wherein the desulfurization tower (12) is connected to the liquid storage component (1) of the aeration system via a reflux pipe (14) so ​​as to transport the liquid in the liquid storage component (1) back to the desulfurization tower (12); a centrifuge (13), the centrifuge (13) being connected to the desulfurization tower (12) to receive the ammonium sulfate slurry formed in the desulfurization tower (12), the centrifuge (13) being in communication with the liquid storage component (1) of the aeration system; a driving pump (140), wherein the driving pump (140) is arranged on the reflux pipe (14) to drive the ammonium sulfate mother liquor to reflux into the desulfurization tower (12) through the reflux pipe (14); The driving pump (140) is connected to a first detection component of the aeration system so as to control the operating state of the driving pump (140) according to the detection result of the first detection component.

Images