CN113426276B - Ammonia desulphurization energy-saving device - Google Patents
Ammonia desulphurization energy-saving device Download PDFInfo
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- CN113426276B CN113426276B CN202110740673.0A CN202110740673A CN113426276B CN 113426276 B CN113426276 B CN 113426276B CN 202110740673 A CN202110740673 A CN 202110740673A CN 113426276 B CN113426276 B CN 113426276B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/04—Regenerating the washing fluid
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Abstract
The disclosure relates to an ammonia desulphurization energy-saving device, which comprises an absorption tower. The absorption tower comprises a washing cooling section, an absorption section and a fine particle control section from the bottom to the top in sequence, wherein the fine particle control section comprises a spraying layer and a gas-liquid separator arranged below the spraying layer. The gas-liquid separator has the function of a washing circulating tank or comprises the washing circulating tank, so that the fine particle control section can form a closed circulating liquid loop, in the closed circulating liquid loop, the lower part of the gas-liquid separator of the fine particle control section is directly connected with the inlet of the washing circulating pump through a first pipeline, the outlet of the washing circulating pump is connected with the spraying layer of the fine particle control section through a second pipeline, and circulating liquid sprayed out of the spraying layer of the fine particle control section is collected by the gas-liquid separator and then directly flows back to the inlet of the washing circulating pump through the first pipeline. Through the closed circulating liquid loop, the high-level gravitational potential energy of the circulating liquid can be fully utilized to reduce the lift of the washing circulating pump and the power consumption of a motor thereof.
Description
Technical Field
The present disclosure generally relates to the field of environmental protection. More particularly, the present disclosure relates to an ammonia desulfurization economizer.
Background
At present, the mainstream process for removing sulfur dioxide from gas is limestone-gypsum method. The method can generate a large amount of waste water and gypsum slag in the desulfurization process, and 0.7 ton of carbon dioxide can be synchronously generated when 1 ton of sulfur dioxide is removed. The treatment of such waste water and slag requires a large amount of investment and running costs. In view of this, ammonia desulfurization processes are receiving increasing attention. The ammonia desulphurization process does not generate wastewater and waste residues, and the added desulfurizer ammonia can be converted into ammonium sulfate fertilizer. Generally, the sale income of ammonium sulfate fertilizer is larger than the investment cost of ammonia, thereby realizing the purpose of changing waste into valuable.
In the ammonia desulphurization process, the absorption circulating solution and the fine particle washing circulating solution are collected by a gas-liquid separator, flow back to respective circulating tanks, and then are pumped out from the circulating tanks by a circulating pump and are pressurized and sent to each spraying layer. Because the heights of the spraying layers are different, the higher the spraying layer is, the higher the lift of the circulating pump is correspondingly, and the higher the motor power and the running power consumption of the circulating pump are correspondingly. Meanwhile, the high backflow pipeline easily causes problems of pipeline vibration, solution carrying gas and the like.
CN212068329U discloses a wet desulphurization energy-saving control device, which comprises an absorption tower, wherein a demister, a multi-stage spraying layer and a slurry pool are sequentially arranged in the absorption tower from top to bottom; nozzles with downward openings are arranged on any one stage of spraying layer; the multistage spraying layers are respectively connected to the slurry tank through a circulating spraying pipeline with a slurry circulating pump; at least one stage of the multi-stage spraying layer is provided with n partitions to form a partitioned spraying layer, n is a positive integer and is not less than 2, and the n partitions are respectively communicated with the slurry tank through a circulating spraying pipeline and are used for controlling the n partitions to spray respectively. This wet flue gas desulfurization energy-saving control device belongs to conventional layering and sprays the design, realizes that the multilayer subregion sprays through setting up many circulating pumps, to the high-order spraying need adopt high-lift circulating pump, fails to realize the utilization of high-order potential energy. Therefore, the technical process of the scheme is complex, the operation consumption is high, and the investment cost is increased.
CN208542002U discloses a flue gas wet flue gas desulfurization economizer, the device includes: the turbulent pipe grid is arranged in the absorption tower and is positioned above the inlet flue; the spraying layer is arranged above the turbulence pipe grid and is connected with the slurry pool at the lower part of the absorption tower through a circulating pump, at least two layers are arranged on the spraying layer, and a telescopic partition plate is arranged between every two adjacent spraying layers; the outlet flue is arranged on the wall of the absorption tower above each spraying layer and is positioned below the telescopic partition plate; the flue gas flow monitoring device is arranged at the inlet flue; and the control device is arranged outside the absorption tower, is in signal connection with the flue gas flow monitoring device, and is respectively connected with all the spraying layers, all the telescopic partition plates and all the outlet flues. The device is through setting up the desulfurization in grades, every grade sprays layer top and sets up flexible baffle and flue outlet, controls several grades through detecting entry flue gas load and sprays the desulfurization. Compared with the conventional absorption tower, the process flow of the scheme is complex, and a plurality of partition plates and flue outlets are added, so that the investment cost is increased, and the operation is easy to break down.
Disclosure of Invention
It is an object of the present disclosure to overcome at least one of the deficiencies in the prior art.
The disclosure provides an ammonia desulphurization energy-saving device. The ammonia desulphurization energy-saving device comprises an absorption tower, wherein the absorption tower sequentially comprises a washing and cooling section, an absorption section and a fine particulate matter control section from the bottom to the top of the absorption tower, and the fine particulate matter control section comprises a spraying layer and a gas-liquid separator arranged below the spraying layer; wherein the gas-liquid separator is configured to have a function of a washing circulation tank or includes a washing circulation tank such that the fine particle control section can form a closed circulation liquid loop in which a lower portion of the gas-liquid separator of the fine particle control section is directly connected with an inlet of a washing circulation pump through a first pipe, an outlet of the washing circulation pump is connected with a spray layer of the fine particle control section through a second pipe, and circulation liquid sprayed from the spray layer of the fine particle control section is collected by the gas-liquid separator and directly flows back to the inlet of the washing circulation pump through the first pipe.
According to an embodiment of the present disclosure, a lower portion of the gas-liquid separator is provided with a groove protruding downward, the groove being directly connected to an inlet of the washing circulation pump through the first pipe.
According to an embodiment of the present disclosure, when the gas-liquid separator is configured to include a wash circulation tank, the wash circulation tank is integrally formed below the gas-liquid separator.
According to an embodiment of the present disclosure, when the gas-liquid separator is configured to include a washing circulation tank, the washing circulation tank is configured as a separate component and is disposed below the gas-liquid separator.
According to one embodiment of the present disclosure, the gas-liquid separator is provided with an anti-vortex mechanism including a mechanical grid and a multi-pipe liquid outlet assembly.
According to an embodiment of the present disclosure, the gas-liquid separator is provided with an anti-gas-entrainment mechanism including a groove and a gas-liquid separation member disposed outside the groove.
According to one embodiment of the present disclosure, the gas-liquid separator comprises a liquid level control system for preventing a liquid level in the gas-liquid separator from being too low or too high, wherein the liquid level control system comprises one or more liquid level measurement components.
According to one embodiment of the present disclosure, the bottom of the one or more level measurement parts is connected to the gas-liquid separator through a third pipe, and the top of the one or more level measurement parts is connected to the lower portion of the spray layer through a fourth pipe.
According to an embodiment of the disclosure, the liquid level control system is configured to be connected with a pipeline of external process water to adjust the liquid level in the gas-liquid separator.
According to one embodiment of the present disclosure, a regulating valve and a flow meter are provided in the pipeline of the external process water, and the liquid level control system regulates the liquid level in the gas-liquid separator by selecting the opening degree of the regulating valve.
According to one embodiment of the present disclosure, the liquid level control system controls the liquid level in the gas-liquid separator between 0.2 and 1.5 meters.
According to one embodiment of the present disclosure, the liquid level control system controls the liquid level in the gas-liquid separator between 0.3 and 0.8 meters.
According to an embodiment of the present disclosure, a drain line is provided in the closed circulation liquid loop of the fine particulate matter control section, the drain line being provided between the washing circulation pump and the spray layer in the closed circulation liquid loop.
According to one embodiment of the present disclosure, the drain line drains at least a portion of the circulating liquid of the fine particulate control section into the oxidation tank.
According to an embodiment of the present disclosure, the drain line is connected to the circulation tank of the absorption section for discharging at least a part of the circulation liquid of the fine particulate matter control section into the circulation tank of the absorption section.
According to one embodiment of the present disclosure, the fine particle control section includes an upper portion and a lower portion, wherein the lower portion of the fine particle control section is washed with a higher concentration of ammonium sulfate solution than the upper portion to remove at least a portion of the fine particles, and the upper portion of the fine particle control section is washed with a lower concentration of ammonium sulfate solution than the lower portion to further remove remaining fine particles.
According to one embodiment of the present disclosure, the washing and cooling section, the absorption section and the fine particle control section are provided with respective circulation liquid loops.
It is noted that aspects of the present disclosure described with respect to one embodiment may be incorporated into other different embodiments, although not specifically described with respect to those other different embodiments. In other words, all embodiments and/or features of any embodiment may be combined in any way and/or combination as long as they are not mutually inconsistent.
Drawings
Aspects of the disclosure will be better understood upon reading the following detailed description in conjunction with the drawings in which:
FIG. 1 is a schematic diagram of an ammonia desulfurization economizer according to one embodiment of the present disclosure;
FIG. 2 is a schematic front view of a gas-liquid separator according to one embodiment of the present disclosure;
FIG. 3 is a schematic side view of the gas-liquid separator shown in FIG. 2;
it should be understood that throughout the drawings, like reference numerals refer to like elements. In the drawings, the size of some of the features may vary and are not drawn to scale for clarity.
Detailed Description
The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the disclosure. It should be understood, however, that the present disclosure may be presented in many different ways and is not limited to the embodiments described below; rather, the embodiments described below are intended to provide a more complete disclosure of the present disclosure, and to fully convey the scope of the disclosure to those skilled in the art. It is also to be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.
It is to be understood that the terminology used in the description is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. All terms (including technical and scientific terms) used in the specification have the meaning commonly understood by one of ordinary skill in the art unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.
As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. The terms "comprising," "including," and "containing" as used in this specification specify the presence of stated features, but do not preclude the presence or addition of one or more other features. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
In the description, when an element is referred to as being "on," "attached to," connected to, "coupled to," or "contacting" another element, etc., another element, it can be directly on, attached to, connected to, coupled to, or contacting the other element, or intervening elements may be present.
In the specification, the terms "first", "second", "third", etc. are used for convenience of description only and are not intended to be limiting. Any technical features denoted by "first", "second", "third", etc. are interchangeable.
In the description, spatial relationships such as "upper", "lower", "front", "back", "top", "bottom", and the like may be used to describe one feature's relationship to another feature in the drawings. It will be understood that the spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, features originally described as "below" other features when the device in the drawings is turned over may now be described as "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationships may be interpreted accordingly.
Referring to FIG. 1, an ammonia desulfurization economizer according to one embodiment of the present disclosure is shown. The ammonia desulfurization energy-saving device according to the present disclosure may include an absorption tower 1. The absorption tower 1 may sequentially comprise a washing and cooling section 2, an absorption section 3 and a fine particulate control section 4 from the bottom to the top. The washing and cooling section 2, the absorption section 3 and the fine particle control section 4 may be provided with respective circulation liquid loops to respectively realize different functions.
The flue gas inlet can be arranged in the scrubbing and cooling section 2. Flue gas enters the washing cooling section 2 of the absorption tower 1 through the flue gas inlet and is cooled and washed by the circulating liquid of the washing cooling section, and meanwhile, the heat of the flue gas can concentrate the circulating liquid of the washing cooling section. The washed and cooled flue gas enters the absorption section 3 and is washed by circulating liquid in the absorption section to be desulfurized. And then, the flue gas enters a fine particle control section 4, and is discharged after being subjected to demisting by circulating liquid in the fine particle control section to remove fine particles.
The fine particle control section 4 is provided with a spray layer 8. The spray layer 8 may include a set of nozzles for spraying the fine particulate control zone circulating liquid. A gas-liquid separator 5 can be arranged below the spraying layer 8 and used for performing gas-liquid separation on the collected fine particle control section circulating liquid and then enabling the collected fine particle control section circulating liquid to enter a fine particle control section circulating liquid loop. The gas-liquid separator 5 may be located at a height of about 30 meters within the absorption tower 1.
The circulating liquid of the fine particle control section can be ammonium sulfate solution. In one embodiment according to the present disclosure, the fine particulate control section 4 may include two portions, namely: an upper portion and a lower portion, wherein the lower portion of the fine particle control section 4 may be washed with a higher concentration of ammonium sulfate solution than the upper portion to remove at least a portion of the fine particles, and the upper portion of the fine particle control section 4 may be washed with a lower concentration of ammonium sulfate solution than the lower portion to further remove the remaining fine particles.
The fine particle control section circulation liquid circuit of the fine particle control section 4 is also typically provided with a wash circulation tank. In the ammonia desulphurization energy-saving device in the prior art, the washing circulation tanks of the fine particulate matter control section 4 are all arranged outside the absorption tower 1 and are positioned between the gas-liquid separator 5 and the washing circulation pump 7 in the circulation liquid loop of the fine particulate matter control section. The applicant has found through a great deal of practice that this prior art construction produces some drawbacks. For example, the fine particle control section circulating liquid from the gas-liquid separator 5 enters the external washing circulating tank before entering the washing circulating pump 7, and the gravitational potential energy of the fine particle control section circulating liquid disappears and cannot be utilized before entering the washing circulating pump 7 due to the buffering effect of the washing circulating tank. This is very disadvantageous for the ammonia desulfurization energy-saving apparatus in which the fine particulate matter control section 4 is disposed in the upper portion of the absorption column 1. Specifically, when fine particle control section 4 sets up in the upper portion of absorption tower 1, in order to control section circulating fluid pump with fine particle to send highly very high spray layer 8, need washing circulating pump 7 to have very big lift, this can show the motor power and the energy consumption of increase washing circulating pump 7, simultaneously, also can lead to return line pipeline vibration, solution to take gas scheduling problem to appear. These problems are further exacerbated by the prior art, which places the scrub circulation tank outside of the absorber tower 1.
In order to solve these problems, in the ammonia desulfurization energy-saving apparatus according to the present disclosure, the gas-liquid separator 5 may be configured to have a function of a scrubbing circulation tank, or the scrubbing circulation tank may be provided inside the absorption tower 1 and formed as a part of the gas-liquid separator 5, thereby avoiding providing an additional scrubbing circulation tank outside the absorption tower 1. When the washing circulation tank is formed as a part of the gas-liquid separator 5, the washing circulation tank may be integrally formed below the gas-liquid separator 5, or may be configured as a separate part and disposed below the gas-liquid separator 5. These configurations each contribute to forming the fine particle control section circulation liquid circuit of the fine particle control section 4 into a closed circulation liquid circuit while maintaining the original function of the washing circulation tank, so that the gravitational potential energy of the fine particle control section circulation liquid can be fully utilized to reduce the required lift of the washing circulation pump 7.
Specifically, in one embodiment according to the present disclosure, the lower part of the gas-liquid separator 5 of the fine particle control section 4 is directly connected with the inlet of the washing circulation pump 7 through a first pipe, and the outlet of the washing circulation pump 7 is connected with the spray layer 8 of the fine particle control section 4 through a second pipe. The circulating liquid sprayed from the spraying layer 8 is collected by the gas-liquid separator 5 and then directly flows back to the inlet of the washing circulating pump 7 through the first pipeline, so that a closed circulating liquid loop is formed. Compared with the ammonia desulphurization energy-saving device in the prior art, the fine particle control section circulating liquid directly flows back to the inlet of the washing circulating pump 7 through the first pipeline after coming out of the gas-liquid separator 5 and does not enter the washing circulating tank arranged outside the absorption tower 1 for buffering, so that the gravitational potential energy of the fine particle control section circulating liquid coming out of the gas-liquid separator 5 can be fully utilized, and the lift required by the washing circulating pump 7 is reduced. The washing circulating pump 7 with smaller lift can not only reduce the function and energy consumption of the motor of the washing circulating pump 7 and save cost, but also help to reduce the vibration of the pipeline in the circulating liquid loop and improve the operation stability of the energy-saving device and the system. In the ammonia desulfurization economizer according to the present disclosure, the head of the washing circulation pump 7 may be in the range of 20 to 25 meters, taking into account the pressure required for the nozzles in the spray level 8, the line pressure drop and the liquid level difference of the circulation liquid circuit. In the ammonia desulphurization energy-saving device in the prior art, the lift of the washing circulating pump needs to be at least over 58 meters.
In one embodiment according to the present disclosure, the lower portion of the gas-liquid separator 5 may be provided with a groove protruding downward, which is directly connected to the inlet of the washing circulation pump 7 through a first pipe.
In another embodiment according to the present disclosure, as shown in fig. 2 and 3, the gas-liquid separator 5 may be provided with a liquid level control system 9. The liquid level control system 9 is used to prevent the liquid level in the gas-liquid separator 5 from being too low or too high (e.g. below a predetermined minimum value of the liquid level or above a predetermined maximum value of the liquid level) resulting in entrained gas in the circulating liquid which may affect the normal operation of the washing circulating pump 7. The liquid level control system 9 is configured to control the liquid level in the gas-liquid separator 5 between 0.2 and 1.5 meters, preferably between 0.3 and 0.8 meters. In one embodiment according to the present disclosure, the liquid level control system 9 may comprise one or more liquid level measuring components for measuring the liquid level in the gas-liquid separator 5. The bottom of the one or more liquid level measurement parts may be connected to the gas-liquid separator 5 (e.g., a gutter at a lower portion of the gas-liquid separator 5) through a third pipe, and the top of the one or more liquid level measurement parts may be connected to the spray layer 8 of the fine particulate matter control section 4 (e.g., a lower portion of the spray layer 8) through a fourth pipe. In one embodiment according to the present disclosure, the liquid level control system 9 may also be configured to be connected with a pipeline of external process water 6 to precisely adjust the liquid level in the gas-liquid separator 5. In the line of the external process water 6 there can be arranged a regulating valve 10 and a flow meter 11. The level control system 9 can precisely adjust the liquid level in the gas-liquid separator 5 by selecting the opening of the regulating valve 10.
In one embodiment according to the present disclosure, in order to further avoid the circulating liquid from carrying gas to affect the normal operation of the washing circulating pump 7, the gas-liquid separator 5 may be provided with an anti-vortex mechanism (or referred to as "anti-rotation mechanism"). The anti-vortex mechanism may comprise a mechanical grid and a multi-pipe liquid outlet assembly for preventing the liquid level from fluctuating violently and preventing air entrained in the circulating liquid of the fine particulate control section from entering the washing circulating pump 7 to affect the operation of the washing circulating pump 7.
In another embodiment according to the present disclosure, the gas-liquid separator 5 may be provided with an anti-entrainment mechanism. The anti-gas-clamping mechanism can comprise a groove and a gas-liquid separation component arranged outside the groove and used for preventing circulating liquid in the circulating liquid loop from carrying gas to cause pipeline vibration of the circulating liquid loop.
Returning to fig. 1, in one embodiment according to the present disclosure, a drain line may also be provided in the fine particulate control section circulating fluid circuit. A drain line may be provided between the wash circulation pump 7 and the spray level 8 in the fine particulate control section circulation liquid loop. The water discharge line may be used to discharge at least a portion of the fine particulate control section recycle liquor to the oxidation tank 12 for recovery by oxidation of ammonium sulfite in the recycle liquor to ammonium sulfate. Similarly to the piping of the external process water 6, a regulating valve 10 and a flow meter 11 for setting the discharge flow rate of the circulating liquid in accordance with the ammonium sulfate concentration in the gas-liquid separator 5 of the fine particulate matter control section 4 may also be provided in the drain piping. In another embodiment according to the present disclosure, a drain line in the fine particulate control section circulation fluid circuit may be connected to the circulation tank of the absorption section 3 for discharging at least a portion of the fine particulate control section circulation fluid into the circulation tank of the absorption section 3.
In the ammonia desulfurization energy-saving device according to the present disclosure, the washing circulation tank separately provided outside the absorption tower 1 in the prior art is eliminated by disposing the washing circulation tank of the fine particulate matter control section 4 inside the absorption tower 1 and making it a part of the gas-liquid separator 5, which enables the circulation liquid loop of the fine particulate matter control section 4 to be formed as a closed circulation liquid loop, thereby making full use of the high gravity potential of the circulation liquid in the gas-liquid separator 5, reducing the lift required for the washing circulation pump 7, and reducing the motor power and energy consumption of the washing circulation pump 7. In addition, the problem of entrained gas of the circulating liquid in the circulating liquid circuit and thus the problem of vibration of the pipes of the circulating liquid circuit can also be solved by making the gas-liquid separator 5 include a backflow prevention mechanism and/or a gas pinching prevention mechanism.
The applicant compared the performance of the washing circulation pump required by the ammonia desulphurization energy-saving device in the prior art and the ammonia desulphurization energy-saving device in the present disclosure. The prior art ammonia desulphurization energy-saving device is designed to be used in a 1 x 130t/h +1 x 410t/h boiler ammonia desulphurization system, and the total flue gas volume is 650000Nm 3 H is used as the reference value. In the ammonia desulphurization energy-saving device in the prior art, an absorption tower is divided into a washing cooling section, an absorption section and a fine particle control section. Each section is provided with one to three spraying layers, each section is provided with a circulating groove, and circulating liquid in each section is sprayed in a circulating way. The fine particle control section is provided with a washing circulation tank located outside the absorption tower, which is placed on the ground. The ammonia desulphurization energy-saving device is provided with two washing circulating pumps A and B, one washing circulating pump A is operated, and the other washing circulating pump B is standby. In this apparatus, each washing circulation pump needs 820m 3 Flow/h and a head of at least 58m, the motor power of each washing circulation pump being at least 250KW. When the ammonia desulfurization energy-saving device according to the present disclosure is adopted in the desulfurization system described above, the washing circulation pump only needs to have 820m 3 The flow/h and the lift of 25m are realized, and the motor power of each washing circulating pump can reach 110KW, so that the operation energy consumption of the washing circulating pump is obviously reduced, and the investment cost is reduced.
Exemplary embodiments according to the present disclosure are described above with reference to the drawings. However, those skilled in the art will appreciate that various modifications and changes can be made to the exemplary embodiments of the disclosure without departing from the spirit and scope of the disclosure. All such variations and modifications are intended to be included herein within the scope of the present disclosure as defined by the appended claims. The disclosure is defined by the following claims, with equivalents of the claims to be included therein.
Claims (12)
1. The ammonia desulphurization energy-saving device is characterized by comprising an absorption tower, wherein the absorption tower sequentially comprises a washing cooling section, an absorption section and a fine particulate matter control section from the bottom to the top, and the fine particulate matter control section comprises a spraying layer and a gas-liquid separator arranged below the spraying layer;
wherein the gas-liquid separator is configured to include a washing circulation tank such that the fine particulate matter control section can form a closed circulation liquid loop by avoiding an additional washing circulation tank for the fine particulate matter control section from being provided outside the absorption tower, in which a lower portion of the gas-liquid separator of the fine particulate matter control section is directly connected to an inlet of a washing circulation pump through a first pipe, an outlet of the washing circulation pump is connected to a spray layer of the fine particulate matter control section through a second pipe, and circulation liquid sprayed from the spray layer of the fine particulate matter control section is collected by the gas-liquid separator and directly returned to the inlet of the washing circulation pump through the first pipe;
wherein the fine particle control section comprises an upper portion and a lower portion, wherein the lower portion of the fine particle control section is washed with a relatively high concentration of ammonium sulfate solution as compared to the upper portion to remove at least a portion of the fine particles, and the upper portion of the fine particle control section is washed with a relatively low concentration of ammonium sulfate solution as compared to the lower portion to further remove remaining fine particles;
wherein the gas-liquid separator comprises a liquid level control system configured to control a liquid level in the gas-liquid separator to prevent the liquid level in the gas-liquid separator from falling below a predetermined minimum value or exceeding a predetermined maximum value resulting in the circulating liquid being entrained with gas, wherein the liquid level control system controls the liquid level in the gas-liquid separator between 0.2 and 1.5 meters;
the gas-liquid separator is provided with an anti-vortex mechanism, and the anti-vortex mechanism comprises a mechanical grating and a multi-pipe liquid outlet assembly; and is provided with
The gas-liquid separator is provided with a gas clamping prevention mechanism, and the gas clamping prevention mechanism comprises a groove and a gas-liquid separation component arranged outside the groove.
2. The ammonia desulfurization energy-saving device according to claim 1, wherein the lower portion of the gas-liquid separator is provided with a groove protruding downward, and the groove is directly connected to the inlet of the scrubbing circulation pump through the first pipe.
3. The ammonia desulfurization energy-saving device according to claim 1, wherein the scrubbing circulation tank is integrally formed below the gas-liquid separator.
4. The ammonia desulfurization economizer of claim 1 wherein the scrubber circulation tank is constructed as a separate component and is disposed below the gas-liquid separator.
5. The ammonia desulfurization economizer of claim 1 wherein the level control system comprises one or more level measurement components.
6. The ammonia desulphurization energy-saving device according to claim 5, wherein the bottoms of the one or more liquid level measurement components are connected with the gas-liquid separator through a third pipeline, and the tops of the one or more liquid level measurement components are connected with the lower part of the spray layer through a fourth pipeline.
7. The ammonia desulfurization energy saving device of claim 5, wherein the liquid level control system is configured to be connected with a pipeline of external process water to adjust the liquid level in the gas-liquid separator.
8. The ammonia desulphurization energy-saving device according to claim 7, wherein the pipeline of the external process water is provided with a regulating valve and a flowmeter, and the liquid level control system is used for regulating the liquid level in the gas-liquid separator by selecting the opening degree of the regulating valve.
9. The ammonia desulfurization energy-saving device of claim 1, wherein the liquid level control system controls the liquid level in the gas-liquid separator to be between 0.3 and 0.8 meters.
10. The ammonia desulphurization energy-saving device according to claim 1, wherein a drain line is arranged in the closed circulating liquid loop of the fine particulate matter control section, and the drain line is arranged between the washing circulating pump and the spray layer in the closed circulating liquid loop.
11. The ammonia desulfurization energy-saving device according to claim 10, wherein the drain line drains at least a part of the circulating liquid in the fine particulate matter control section into the oxidation tank.
12. The ammonia desulfurization economizer of claim 10 wherein the water discharge line is connected to the recycle tank of the absorption section for discharging at least a portion of the recycle liquor of the fine particulate control section into the recycle tank of the absorption section.
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| JP2716823B2 (en) * | 1989-12-15 | 1998-02-18 | 三菱重工業株式会社 | Pump operation control device |
| CN201744294U (en) * | 2010-06-25 | 2011-02-16 | 北京紫光威肯环保工程技术有限公司 | Desulfurizing tower for absorbing escaped ammonia from boiler flue by utilizing circulating water |
| CN202590610U (en) * | 2012-05-02 | 2012-12-12 | 山东天泰钢塑有限公司 | Desulphurization device through circulating absorption of liquid ammonia |
| CN103252158B (en) * | 2013-04-27 | 2015-05-20 | 高翀 | Desulfurization system and desulfurization process thereof |
| CN103301705B (en) * | 2013-06-06 | 2015-08-19 | 江苏新世纪江南环保股份有限公司 | A kind of desulfurization fume fine particulates control device and method |
| CN103908883B (en) * | 2014-04-18 | 2016-01-20 | 中石化南京工程有限公司 | A kind of ammonia of sulfur recovery facility absorbs exhaust gas treating method |
| CN103977689B (en) * | 2014-05-30 | 2015-02-18 | 陕西智惠环保科技有限公司 | Device and method for removing sulfur dioxide in smoke by two-step alkalifying reproducing and sodium sulfite method |
| CN105148712B (en) * | 2015-10-10 | 2017-11-14 | 中石化南京工程有限公司 | A kind of classification Absorption Desulfurization device of ammoniacal ammonium sulphate method |
| CN108043193A (en) * | 2018-01-31 | 2018-05-18 | 上海蓝科石化环保科技股份有限公司 | A kind of ultra-clean discharge ammonia process of desulfurization dust-extraction unit and method |
| CN110433637A (en) * | 2019-07-30 | 2019-11-12 | 大连汉诺工程技术有限公司 | A kind of Method of Soda flue gas desulfurization device and technique |
| CN211585973U (en) * | 2019-07-30 | 2020-09-29 | 大连汉诺工程技术有限公司 | Flue gas desulfurization energy-saving device adopting soda ash method |
| CN210829416U (en) * | 2019-09-23 | 2020-06-23 | 西安联创新能环保科技有限公司 | ORC power generation system of closed cooling condenser |
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