Concentration crystallization section chemical solid-liquid separation type ammonia process desulfurization tower

Abstract

The invention relates to the technical field of desulfurization towers, and particularly discloses a concentration and crystallization section chemical solid-liquid separation type ammonia process desulfurization tower which comprises a desulfurization tower body, the desulfurization tower body is provided with a concentration section, an evaporation section and a spraying section from bottom to top, the concentration section of the desulfurization tower body is conical, the side wall of the desulfurization tower body is provided with an air inlet, and the spraying section is provided with an air outlet. A gas outlet is formed in the top end of the desulfurization tower body, and a supporting assembly is arranged at the bottom end of the desulfurization tower body; the concentrated solution is located at the concentration section of the desulfurization tower body, and the concentrated solution comprises a crystallization area and a clear liquid area; and the spraying assembly is located on the spraying section. The design of the cone structure at the bottom of the desulfurization tower body improves the separation efficiency of a clear liquid area and a crystallization area, the separation granularity is also increased, slurry in a concentration section is layered up and down according to the size of slurry particles, the solid content of a concentration cooling pump is reduced to below 10%, an installer of a distributor in the concentration section is omitted, and the failure rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurization towers, and in particular to a concentrated crystallization section chemical solid-liquid separation type ammonia-based desulfurization tower. Background Art

[0002] The ammonia desulfurization tower is a device used for flue gas treatment, mainly used to remove sulfur dioxide in flue gas. This technology uses ammonia or ammonia water as an absorbent to react with sulfur dioxide in the flue gas to produce ammonium sulfite and ammonium sulfate, thereby achieving the purpose of desulfurization. The ammonia desulfurization tower has the advantages of high efficiency, low energy consumption, and no secondary pollution. It can also convert sulfur dioxide into high-value-added ammonium sulfate fertilizer products to achieve resource utilization.

[0003] During the use of some existing solid-liquid separation ammonia desulfurization towers, the bottom is generally flat, and the stirring methods of the bottom concentration section mainly include the following two methods: oxidizing air stirring and hydraulic distribution pipe stirring. Both of the above stirring methods require a distributor to be installed in the tower, resulting in a high failure rate of the distributor, a high frequency of manual maintenance, high cost, and insufficient liquid stratification effect in the concentration section. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a concentrated crystallization section chemical solid-liquid separation type ammonia desulfurization tower, which can solve the problems raised in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A concentrated crystallization section chemical solid-liquid separation type ammonia desulfurization tower, comprising: A desulfurization tower body, wherein the desulfurization tower body is provided with a concentration section, an evaporation section, and a spray section from bottom to top, the concentration section of the desulfurization tower body is arranged in a cone shape, the side wall of the desulfurization tower body is provided with an air inlet, the top of the desulfurization tower body is provided with an air outlet, and the bottom of the desulfurization tower body is provided with a support assembly; Concentrated liquid, the concentrated liquid is located in the concentrating section of the desulfurization tower body, and the concentrated liquid includes a crystallization area and a clear liquid area; A spray assembly, wherein the spray assembly is located in the spray section; A liquid pumping component, the liquid pumping component is used to pump the liquid in the clear liquid area to the spraying component; A cooling component is used to cool the flow in the crystallization zone. The cooling component includes a cooling crystallization pump. The liquid inlet of the cooling crystallization pump is equipped with a solution outlet pipe. The solution outlet pipe is arranged to penetrate the bottom end of the desulfurization tower body. The solution outlet pipe matches the crystallization zone. The liquid outlet of the cooling crystallization pump is provided with a delivery pipe. A circulation pipe is provided at one end of the delivery pipe away from the cooling crystallization pump. The end of the circulation pipe away from the cooling crystallization pump is located in the crystallization zone.

[0006] Preferably, the angle between the side wall of the cone at the bottom of the desulfurization tower body and the horizontal direction is 30 degrees.

[0007] Preferably, the air inlet is arranged at an angle, and the air inlet is used to guide the smoke.

[0008] Preferably, the support assembly includes a plurality of support legs, and the support legs are fixedly mounted on the bottom end of the desulfurization tower body. The plurality of support legs are distributed in an array, and a cross bar is provided between two adjacent support legs.

[0009] Preferably, the spray assembly comprises a straight pipe, which passes through and is fixedly installed on the side wall of the desulfurization tower body. A communicating annular pipe is installed at one end of the straight pipe located inside the desulfurization tower body, and a plurality of nozzles are installed on the side wall of the annular pipe through a branch pipe.

[0010] Preferably, the liquid pumping assembly includes a clear liquid outlet pipe, which passes through and is installed on the side wall of the desulfurization tower body, and the clear liquid outlet pipe matches the clear liquid area. A drainage pipe is arranged between the clear liquid outlet pipe and the straight pipe, and a concentration and cooling pump is arranged on the side wall of the drainage pipe. A solenoid valve is arranged on the side wall of the drainage pipe, and the solenoid valve is located above the concentration and cooling pump.

[0011] Preferably, the cooling component includes a motor, the motor is fixedly mounted on the bottom end of the desulfurization tower body, and a turbulent agitator is fixedly mounted on the output of the motor, and the turbulent agitator is located in the crystallization zone.

[0012] Preferably, a sealing sleeve is provided through the bottom end of the desulfurization tower body, and the output shaft of the turbulent agitator is rotatably connected to the sealing sleeve.

[0013] The beneficial effects of the present invention are: 1. By setting the desulfurization tower body and the liquid pumping assembly, the beneficial effect that can be obtained is that the desulfurization tower body is provided with a concentration section, an evaporation section, and a spray section from bottom to top, the concentration section of the desulfurization tower body is arranged in a cone shape, the side wall of the desulfurization tower body is provided with an air inlet, and the top of the desulfurization tower body is provided with an air outlet. The concentrated liquid is located in the concentration section of the desulfurization tower body, and the concentrated liquid includes a crystallization area and a clear liquid area. The spray assembly is located in the spray section, and the liquid pumping assembly is used to pump the liquid in the clear liquid area to the spray assembly; The boiler flue gas is sent into the desulfurization tower body from the air inlet. The concentration and cooling pump cooperates with the straight pipe, the drainage pipe and the clear liquid outlet pipe to draw the ammonium sulfate solution in the clear liquid area into the annular pipe, and sprays it from multiple nozzles. In the concentration section of the desulfurization tower body, the ammonium sulfate solution is circulated and sprayed by the concentration and cooling pump, and fully contacts with the high-temperature boiler flue gas. The desulfurized flue gas flows out from the air outlet, and the ammonium sulfate solution is evaporated and concentrated by the vaporization heat of the high-temperature flue gas to finally obtain a concentrated liquid. At the same time, the crystallization area of ​​the concentrated liquid is cyclically cooled by the cooling component, and the flow field of the liquid is used to ensure that there is no sediment at the bottom of the concentration section, or a flow field is established for the crystallization area of ​​the concentrated liquid by turbulent stirring. The bottom of the desulfurization tower body is set in a cone shape. The design of the cone structure improves the separation efficiency of the clear liquid area and the crystallization area, and also increases the separation particle size. The slurry in the concentration section is layered up and down according to the size of the slurry particles, and the solid content of the concentration and cooling pump is reduced to less than 10%.

[0014] 2. By setting a cooling component, the beneficial effect that can be obtained is that the cooling component is used to cool the flow in the crystallization zone, the cooling component includes a cooling crystallization pump, the liquid inlet of the cooling crystallization pump is equipped with a solution outlet pipe, the solution outlet pipe is arranged through the bottom end of the desulfurization tower body, the solution outlet pipe matches the crystallization zone, the liquid outlet of the cooling crystallization pump is provided with a delivery pipe, the end of the delivery pipe away from the cooling crystallization pump is provided with a circulation pipe, and the end of the circulation pipe away from the cooling crystallization pump is located in the crystallization zone; The cooling crystallization pump cooperates with the solution outlet pipe, delivery pipe and circulation pipe to pump the liquid in the crystallization area at the bottom of the cone of the desulfurization tower into the desulfurization tower body. The cooling crystallization pump cools the liquid in the crystallization area and establishes a flow field to ensure that no material is deposited at the bottom of the concentration section. By establishing a flow field, the distributor installer in the concentration section is eliminated, and the failure rate is reduced.

[0015] 3. By setting a cooling component, the beneficial effect that can be obtained is that the cooling component includes a motor, the motor is fixedly installed at the bottom of the desulfurization tower body, and a turbulent stirrer is fixedly installed at the output of the motor, and the turbulent stirrer is located in the crystallization zone; The turbulent agitator is driven by a motor to rotate in the crystallization area at the bottom of the cone of the desulfurization tower to cause turbulence. Both methods establish flow fields, eliminate the distributor installer in the concentration section, and reduce the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an installation structure diagram of the liquid pumping component in the present invention; Figure 3 This is a diagram of the installation structure of the spray assembly in the present invention; Figure 4The figure is a diagram of the installation structure of the motor in the present invention; Figure 5 It is the installation structure diagram of the motor and the turbulent stirrer in the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle.

[0018] Description of reference numerals: In the figure: 1. desulfurization tower body; 11. air inlet; 12. air outlet; 13. supporting feet; 14. cross bar; 21. crystallization area; 22. clear liquid area; 31. straight pipe; 32. annular pipe; 33. nozzle; 41. clear liquid outlet pipe; 42. drainage pipe; 43. concentration cooling pump; 44. solenoid valve; 5. cooling crystallization pump; 51. solution outlet pipe; 52. delivery pipe; 53. circulation pipe; 61. motor; 62. turbulent agitator; 63. sealing sleeve. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0021] Embodiment 1: Reference Figure 1-Figure 3 , is a concentration crystallization section chemical solid-liquid separation ammonia desulfurization tower disclosed in the present invention, comprising a desulfurization tower body 1, the desulfurization tower body 1 is provided with a concentration section, an evaporation section, and a spray section from bottom to top, the concentration section of the desulfurization tower body 1 is arranged in a cone shape, the angle between the side wall of the cone at the bottom of the desulfurization tower body 1 and the horizontal direction is 30 degrees, the side wall of the desulfurization tower body 1 is provided with an air inlet 11, the air inlet 11 is inclined, and the air inlet 11 is used to drain the flue gas, the top of the desulfurization tower body 1 is provided with an air outlet 12, and the bottom end of the desulfurization tower body 1 is provided with a support assembly, the support assembly includes a plurality of support legs 13, the support legs 13 are fixedly installed at the bottom end of the desulfurization tower body 1, the plurality of support legs 13 are distributed in an array, and a cross bar 14 is provided between two adjacent support legs 13; Concentrated liquid, the concentrated liquid is located in the concentrating section of the desulfurization tower body 1, and the concentrated liquid includes a crystallization area 21 and a clear liquid area 22; Spray assembly, the spray assembly is located in the spray section, and the spray assembly includes a straight pipe 31, the straight pipe 31 penetrates and is fixedly installed on the side wall of the desulfurization tower body 1, and one end of the straight pipe 31 located in the desulfurization tower body 1 is installed with a communicating annular pipe 32, and the side wall of the annular pipe 32 is installed with multiple nozzles 33 through a branch pipe; A liquid pumping assembly, which is used to pump the liquid in the clear liquid area 22 to the spray assembly. The liquid pumping assembly includes a clear liquid outlet pipe 41, which penetrates and is installed on the side wall of the desulfurization tower body 1. The clear liquid outlet pipe 41 matches the clear liquid area 22. A drainage pipe 42 is provided between the clear liquid outlet pipe 41 and the straight pipe 31. A concentration cooling pump 43 is provided on the side wall of the drainage pipe 42. A solenoid valve 44 is provided on the side wall of the drainage pipe 42. The solenoid valve 44 is located above the concentration cooling pump 43; A cooling component is used to cool the flow in the crystallization zone 21. The cooling component includes a cooling crystallization pump 5. A solution outlet pipe 51 is installed at the liquid inlet of the cooling crystallization pump 5. The solution outlet pipe 51 is arranged to penetrate the bottom end of the desulfurization tower body 1. The solution outlet pipe 51 matches the crystallization zone 21. A delivery pipe 52 is arranged at the liquid outlet of the cooling crystallization pump 5. A circulation pipe 53 is arranged at one end of the delivery pipe 52 away from the cooling crystallization pump 5. One end of the circulation pipe 53 away from the cooling crystallization pump 5 is located in the crystallization zone 21.

[0022] Embodiment 2: Reference Figure 4-Figure 6 A concentration crystallization section chemical solid-liquid separation ammonia desulfurization tower is different from the first embodiment in that the cooling component includes a motor 61, the motor 61 is fixedly installed at the bottom end of the desulfurization tower body 1, and a turbulent agitator 62 is fixedly installed at the output of the motor 61. The turbulent agitator 62 is located in the crystallization zone 21. A sealing sleeve 63 is penetrated at the bottom end of the desulfurization tower body 1, and the output shaft of the turbulent agitator 62 is rotatably connected to the sealing sleeve 63.

[0023] The working principle and use process of the present invention are as follows: the boiler flue gas is sent into the desulfurization tower body 1 from the air inlet 11, and the concentration and cooling pump 43 cooperates with the straight pipe 31, the drainage pipe 42 and the clear liquid outlet pipe 41 to draw the ammonium sulfate solution in the clear liquid area 22 into the annular pipe 32, and sprays from multiple nozzles 33. In the concentration section of the desulfurization tower body 1, the ammonium sulfate solution circulates and sprays through the concentration and cooling pump 43, and fully contacts with the high-temperature boiler flue gas. The desulfurized flue gas flows out from the air outlet 12, and the ammonium sulfate solution is evaporated and concentrated by using the vaporization heat of the high-temperature flue gas. , and finally a concentrated liquid is obtained. At the same time, the crystallization area 21 of the concentrated liquid is cyclically cooled by a cooling component, and the flow field of the liquid is used to ensure that no material is deposited at the bottom of the concentrated section, or a flow field is established for the crystallization area 21 of the concentrated liquid by a turbulent stirring method. The bottom of the desulfurization tower body 1 is set in a cone shape. The design of the cone structure improves the separation efficiency of the clear liquid area 22 and the crystallization area 21, and also increases the separation particle size. The slurry in the concentrated section is layered up and down according to the slurry particle size, and the solid content of the concentrated cooling pump 43 is reduced to less than 10%; In the cooling component of the first embodiment, the cooling crystallization pump 5 cooperates with the solution outlet pipe 51, the delivery pipe 52 and the circulation pipe 53 to pump the liquid in the crystallization area 21 at the bottom of the cone of the desulfurization tower body 1 to the concentration section. At the same time, the cooling crystallization pump 5 cools the liquid in the crystallization area 21 to establish a flow field to ensure that no material is deposited at the bottom of the concentration section; In the cooling component of the second embodiment, the motor 61 drives the turbulent agitator 62 to rotate in the crystallization zone 21 at the bottom of the cone of the desulfurization tower body 1 to perform turbulence. The concentration section stirring does not require an internal distributor, which reduces the failure rate.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A concentrated crystallization section chemical solid-liquid separation ammonia desulfurization tower, characterized in that: include: A desulfurization tower body (1), wherein the desulfurization tower body (1) is provided with a concentration section, an evaporation section, and a spray section from bottom to top, the concentration section of the desulfurization tower body (1) is arranged in a cone shape, the side wall of the desulfurization tower body (1) is provided with an air inlet (11), the top of the desulfurization tower body (1) is provided with an air outlet (12), and the bottom of the desulfurization tower body (1) is provided with a support assembly; Concentrated liquid, the concentrated liquid is located in the concentrating section of the desulfurization tower body (1), and the concentrated liquid includes a crystallization area (21) and a clear liquid area (22); A spray assembly, wherein the spray assembly is located in the spray section; A liquid pumping component, the liquid pumping component is used to pump the liquid in the clear liquid area (22) toward the spraying component; A cooling component, the cooling component is used to cool the flow in the crystallization zone (21), the cooling component comprises a cooling crystallization pump (5), the liquid inlet of the cooling crystallization pump (5) is provided with a solution outlet pipe (51), the solution outlet pipe (51) is arranged to penetrate the bottom end of the desulfurization tower body (1), the solution outlet pipe (51) matches the crystallization zone (21), the liquid outlet of the cooling crystallization pump (5) is provided with a delivery pipe (52), the end of the delivery pipe (52) away from the cooling crystallization pump (5) is provided with a circulation pipe (53), and the end of the circulation pipe (53) away from the cooling crystallization pump (5) is located in the crystallization zone (21).

2. A concentrated crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 1, characterized in that: The angle between the side wall of the cone at the bottom of the desulfurization tower body (1) and the horizontal direction is 30 degrees.

3. The concentrated crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 1, characterized in that: The air inlet (11) is arranged at an angle, and the air inlet (11) is used to guide smoke.

4. The concentrated crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 1, characterized in that: The support assembly comprises a plurality of support legs (13), wherein the support legs (13) are fixedly mounted on the bottom end of the desulfurization tower body (1), the plurality of support legs (13) are distributed in an array, and a cross bar (14) is provided between two adjacent support legs (13).

5. The concentrated crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 1, characterized in that: The spray assembly comprises a straight pipe (31), the straight pipe (31) passing through and fixedly mounted on the side wall of the desulfurization tower body (1), one end of the straight pipe (31) located inside the desulfurization tower body (1) being mounted with a communicating annular pipe (32), and a plurality of spray heads (33) being mounted on the side wall of the annular pipe (32) via a branch pipe.

6. A concentration crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 5, characterized in that: The liquid pumping assembly comprises a clear liquid outlet pipe (41), the clear liquid outlet pipe (41) penetrates through and is installed on the side wall of the desulfurization tower body (1), the clear liquid outlet pipe (41) matches the clear liquid area (22), a drainage pipe (42) is provided between the clear liquid outlet pipe (41) and the straight pipe (31), a concentration cooling pump (43) is provided on the side wall of the drainage pipe (42), and a solenoid valve (44) is provided on the side wall of the drainage pipe (42), and the solenoid valve (44) is located above the concentration cooling pump (43).

7. The concentrated crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 1, characterized in that: The cooling component comprises a motor (61), the motor (61) being fixedly mounted on the bottom end of the desulfurization tower body (1), and a turbulent stirrer (62) being fixedly mounted on the output of the motor (61), the turbulent stirrer (62) being located in the crystallization zone (21).

8. The concentration crystallization section chemical solid-liquid separation ammonia desulfurization tower according to claim 7, characterized in that: A sealing shaft sleeve (63) is provided through the bottom end of the desulfurization tower body (1), and the output shaft of the turbulent stirrer (62) is rotatably connected to the sealing shaft sleeve (63).

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