Desulfurization device

Abstract

The utility model relates to a desulfurization device which comprises a desulfurization reaction mechanism and a density adjusting mechanism arranged on the desulfurization reaction mechanism, the desulfurization reaction mechanism comprises a first reaction mechanism and a second reaction mechanism, and the first reaction mechanism is connected with the second reaction mechanism. The first reaction mechanism is used for carrying out primary treatment on entering smoke gas, the second reaction mechanism is used for carrying out secondary treatment on the entering smoke gas, and the density adjusting mechanism comprises a liquid circulation connecting piece; the desulfurization device provided by the utility model can ensure that the pH value in the two-stage reaction tower is stable, and the problems of slurry density difference and water balance are reduced, so that the desulfurization and deacidification effects of flue gas are improved, and the flue gas reaches the emission standard.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a double-stage desulfurization device suitable for high-concentration SO2 flue gas. Background Art

[0002] As we all know, most of the industrial waste gas generated in the industrial production process comes from the power supply industry, or new energy, and building materials and other related industries. Specifically, for example, in the actual production process of a power plant, the actual sulfur content of the coal required is far more than the design value. Then the existing desulfurization device is difficult to meet the emission requirements, and the existing equipment needs to be modified. Some devices adopt a series tower structure, that is, an absorption tower is connected in series after the original absorption tower, so that the treated flue gas can meet the emission standards and can make full use of the existing color equipment and reduce costs. The flue gas first enters the primary absorption tower for desulfurization treatment, and then enters the secondary absorption tower through the flue for further desulfurization treatment. Since 70% of the flue gas desulfurization is completed in the first-level desulfurization tower, more slurry is put into the first-level circulation pool, so the first-level circulation pool The liquid level and pH value will be higher than that of the secondary circulation pool, which leads to the unstable pH value of the two-stage circulation pool and a large fluctuation range, which is not conducive to the slurry aeration oxidation and low desulfurization efficiency. Since most of the SO2 is absorbed in the primary absorption tower and generates by-product gypsum, the secondary absorption tower processes the remaining small amount of SO2. Therefore, there are density differences and water balance problems in the two series-connected desulfurization towers. For example, if the crystallization water of desulfurization gypsum does not meet the requirements, it will cause scaling of the pipeline of the primary desulfurization tower. Therefore, the interconnected structure of the two-stage absorption tower is conducive to the operation of the device. Therefore, a reaction tower device suitable for high-concentration desulfurization waste gas treatment is needed to maintain a stable pH value of the circulating water pool during the waste gas treatment process, reduce the slurry density difference and water balance problems, and the desulfurizer can be recycled so that the flue gas emissions meet the emission standards and reduce pollution. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a desulfurization treatment device suitable for high-concentration desulfurization, which can ensure the pH value of the circulating water pool in the desulfurization reaction tower is stable and the difference in slurry density value is small.

[0004] In order to achieve the purpose of the utility model, the utility model provides a desulfurization device, including a desulfurization reaction mechanism and a regulating mechanism arranged on the desulfurization reaction mechanism, the desulfurization reaction mechanism includes a first reaction mechanism and a second reaction mechanism, the first reaction mechanism is connected to the second reaction mechanism, the first reaction mechanism is used to perform primary treatment on the incoming flue gas, and the second reaction mechanism is used to perform secondary treatment on the incoming flue gas, the regulating mechanism includes a liquid circulation connector, the first end of the liquid circulation connector is connected to a lower side surface of the first reaction mechanism, the second end of the liquid circulation connector is connected to a lower side surface of the second reaction structure, the first reaction mechanism and the second reaction mechanism are connected to form a circulation cavity, the circulation cavity is provided with a circulation valve mechanism, the circulation valve mechanism is used to circulate the slurry in the first reaction mechanism and the second reaction mechanism and balance the slurry density in the two-stage mechanism.

[0005] Preferably, the first reaction mechanism includes a first reaction tower body, a first reaction chamber is formed in the first reaction tower body, a first gas reaction chamber and a first slurry pool are arranged in the first reaction chamber, the height of the first gas reaction chamber is three quarters of the height of the first reaction chamber as a whole, the first slurry pool is the bottom part of the remaining one quarter of the first reaction chamber as a whole, a first stirring mechanism is arranged at the bottom of the first slurry pool, the first stirring mechanism includes a stirrer, and the stirring blades of the stirrer are facing the liquid surface direction of the first slurry pool.

[0006] Preferably, the circulation valve mechanism includes a liquid circulation valve, the liquid circulation connecting piece includes a circulation pipe, a first filter is provided at the connection between the first end of the circulation pipe and the first reaction mechanism, a second filter is provided at the connection port between the second end of the circulation pipe and the second reaction structure, a slurry concentration display is provided on the surface of the circulation pipe, and a slurry concentration sensor is provided at a position inside the circulation pipe near the liquid circulation valve.

[0007] Preferably, a first spray mechanism is provided in the first gas reaction chamber, the first spray mechanism includes a first spray unit, the first spray unit includes at least three groups, each group of the spray units is arranged in reverse intervals from the upper position of the first reaction chamber toward the lower part of the first reaction chamber, and the spraying direction of each spray unit is toward the slurry pool at the bottom of the reaction chamber.

[0008] Preferably, the second reaction mechanism includes a second reaction tower body, a first reaction chamber is formed in the second reaction tower body, a second gas reaction chamber and a second slurry pool are provided in the second reaction chamber, the second reaction chamber is arranged at the upper part of the second slurry pool, and the liquid height of the second slurry pool is the same as the liquid height of the first slurry pool.

[0009] Preferably, a second spray mechanism is provided in the second reaction chamber, the second spray mechanism includes a second spray unit, at least three second spray units are provided, each of the spray units is arranged at intervals, and the spray of the second spray unit is in the direction of the bottom slurry pool in the second reaction chamber.

[0010] Preferably, the second spray unit includes a high-pressure nozzle and a smoker, the high-pressure nozzle and the smoker are arranged at intervals, there are at least four high-pressure nozzles, and there are at least four smokers, each high-pressure nozzle and smoker are arranged in regular intervals, and the air suction direction of each smoker is toward the slurry pool at the bottom.

[0011] Preferably, a second stirring mechanism is provided at the bottom of the second slurry pool, and the second stirring mechanism includes a first direction agitator and a second direction agitator, the first direction agitator and the first direction agitator are used to stir the lower left part of the second slurry pool, and the second direction agitator is used to stir the lower right part of the second slurry pool.

[0012] Preferably, the first reaction mechanism is provided with a first flue gas connecting mechanism, which includes a first flue gas connecting pipe, a first end of the first flue gas connecting pipe is connected to the first gas reaction chamber, and a second end of the first flue gas connecting pipe is connected to the lower part of the second reaction chamber.

[0013] Preferably, the second reaction mechanism is provided with a second flue gas connecting mechanism, which includes a second flue gas connecting pipe fitting, a first end of the second flue gas connecting pipe fitting is connected to the top position of the second reaction chamber, and a second end is connected to the flue gas treatment device at the rear end.

[0014] The beneficial effects of the utility model are as follows: the utility model provides a desulfurization device, which is provided with a first reaction mechanism and a second reaction mechanism. The first reaction mechanism performs primary treatment on the incoming flue gas, and the second reaction mechanism is used to perform secondary treatment on the incoming flue gas. A flow valve mechanism is provided on the flow cavity on the first reaction mechanism and the second reaction mechanism to ensure the stability of the pH value in the two-stage reaction tower, reduce the problem of slurry density difference and water balance, thereby improving the desulfurization and deacidification effects of the flue gas and meeting the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other purposes, features and advantages of the present invention will become more apparent through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals in all the accompanying drawings indicate the same parts, and the drawings are not intentionally scaled to the actual size, but the focus is on illustrating the subject matter of the present invention.

[0016] Figure 1It is a schematic plan view of a preferred embodiment of a desulfurization device of the utility model;

[0017] Figure 2 This is a schematic diagram of an embodiment of a desulfurization device of the utility model;

[0018] In the figure: 1. first reaction mechanism; 11. first reaction chamber; 12. first slurry pool; 13. first agitator; 14. first flue gas connecting pipe; 2. second reaction mechanism; 21. second reaction tower body; 22. second slurry pool; 23. first direction agitator; 24. second direction agitator; 25. second flue gas connecting pipe; 3. liquid circulation connector; 30. circulation chamber; 31. circulation pipe; 32. first filter element; 33. second filter element; 4. circulation valve; 5. concentration display; 6. slurry concentration sensor; 7. first spray unit; 8. second spray unit; 81. high pressure nozzle; 82. smoking device. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings.

[0020] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] like Figure 1-2As shown, the embodiment of the utility model provides a desulfurization device, including a desulfurization reaction mechanism and a regulating mechanism arranged on the desulfurization reaction mechanism, the desulfurization reaction mechanism includes a first reaction mechanism 1 and a second reaction mechanism 2, the first reaction mechanism 1 is connected to the second reaction mechanism 2, the first reaction mechanism 1 is used to perform primary treatment on the incoming flue gas, and the second reaction mechanism 2 is used to perform secondary treatment on the incoming flue gas, the regulating mechanism includes a liquid circulation connector 3, the first end of the liquid circulation connector 3 is connected to a side surface of the lower part of the first reaction mechanism 1, the second end of the liquid circulation connector 3 is connected to a side surface of the lower part of the second reaction mechanism 2, the first reaction mechanism 1 and the second reaction mechanism 2 are connected to form a circulation cavity 30, the circulation cavity 30 is provided with a circulation valve mechanism, the circulation valve mechanism is used to circulate the first The density of the slurry in the first reaction mechanism 1 and the second reaction mechanism 2 is balanced in the two-stage mechanism, because when treating high-concentration sulfur-containing flue gas, the flue gas first enters the first reaction mechanism 1, and about 70% of the sulfur content in the flue gas is desulfurized in the first reaction mechanism 1. After being desulfurized by the first reaction mechanism 1, the flue gas immediately enters the second reaction mechanism 2 for desulfurization. Therefore, the flow valve mechanism set can balance the slurry liquid level in the two-stage reaction mechanism. While balancing the liquid level, the density of the slurry after the bottom of the two slurry pools is also balanced. The desulfurizer can flow freely between the two-stage reaction mechanisms to achieve recycling, and there is no need to add drugs to the two-stage reaction mechanisms separately, which avoids the situation that the pH value of the circulating water pool in the two-stage reaction mechanism is unstable and has a large fluctuation range.

[0023] refer to Figure 1-2 As shown, in a further preferred embodiment, the first reaction mechanism 1 includes a first reaction tower body, a first reaction chamber 11 is formed in the first reaction tower body, a first gas reaction chamber and a first slurry pool 12 are arranged in the first reaction chamber 11, the height of the first gas reaction chamber is three quarters of the height of the first reaction chamber as a whole, the first slurry pool 12 is the bottom part of the remaining one quarter of the first reaction chamber as a whole, a first stirring mechanism is arranged at the bottom of the first slurry pool 12, the first stirring mechanism includes a stirrer 13, the stirring blades of the stirrer 13 are facing the liquid surface direction of the first slurry pool, the first stirrer 13 is used to disperse and stir the desulfurizer added to the slurry liquid at the bottom of the first slurry pool, then as a preferred embodiment, two first stirrers 13 can be provided, and stirrers are arranged on the left and right sides of the bottom of the first slurry pool for stirring to ensure that the density of the circulating slurry is balanced and the pH value is stable.

[0024] refer to Figure 1-2As shown, in a preferred embodiment, the circulation valve mechanism includes a liquid circulation valve 4, and the liquid circulation connector includes a circulation pipe 31. A first filter 32 is provided at the connection between the first end of the circulation pipe 31 and the first reaction mechanism 1, and a second filter 33 is provided at the connection port between the second end of the circulation pipe 31 and the second reaction structure, which is equivalent to providing a filter screen for filtering at both ends of the circulation pipe. The provided filter screen can prevent the high-concentration sulfur-containing flue gas from being absorbed in the primary reaction mechanism and the by-product gypsum generated from accumulating in the pipe and causing blockage. A slurry concentration display 5 is provided on the surface of the circulation pipe 31. The concentration display 5 is a display panel for testing the pH value of the slurry. A slurry concentration sensor 6 is provided at a position near the liquid circulation valve in the circulation pipe 31 and is electrically connected to the concentration display 5. The slurry concentration sensor 6 is a liquid pH value tester or other test instrument for measuring and sensing the pH value of the liquid or The sensor is used to ensure that the desulfurizer added to the first reaction mechanism 1 can be fully mixed in the reaction pool and circulated in the two-stage reaction mechanisms to be fully utilized, thereby reducing two-stage additions and reducing costs. When only the slurry pool in the first-stage reaction mechanism is required to operate independently, the liquid circulation valve 4 on the circulation pipe is closed. When the water balance density in the two-stage reaction mechanism is required, the liquid circulation valve 4 is opened. The added desulfurizer can flow freely between the two-stage reaction mechanisms to achieve recycling. The liquid in the two-stage slurry pool is used for slurry aeration oxidation and desulfurization. If the pH value of the two-stage circulation pool is unstable, it will lead to unfavorable slurry aeration oxidation and low desulfurization efficiency. The generated desulfurization gypsum crystal water does not meet the requirements (for example, crystal water ≤14%, sulfur trioxide ≤35%), and may even cause scaling of the pipeline of the first-stage desulfurization tower. In addition, for waste gas with a very high original SO2 concentration, the problem of needing a large slurry pool is solved.

[0025] refer to Figure 1-2 As shown, in a preferred embodiment, a first spray mechanism is provided in the first gas reaction chamber, the first spray mechanism includes a first spray unit 7, the first spray unit 7 includes at least three groups, each group of spray units 7 is arranged in reverse intervals from the upper position of the first reaction chamber toward the lower part of the first reaction chamber, and the spraying direction of each spray unit is toward the slurry pool at the bottom of the reaction chamber. The arranged spray unit sprays the high-concentration sulfur-containing flue gas entering the reaction chamber, and the solid particles generated during the spraying process will fall into the slurry pool at the bottom for reaction.

[0026] refer to Figure 1-2As shown, in a preferred embodiment, the second reaction mechanism 2 includes a second reaction tower body 21, a first reaction chamber is formed in the second reaction tower body 21, a second gas reaction chamber and a second slurry pool 22 are provided in the second reaction chamber, the second reaction chamber is arranged at the upper part of the second slurry pool 22, the second reaction chamber is used to treat the remaining small part of the SO2 flue gas after being treated by the first reaction chamber, the liquid height of the second slurry pool 22 is the same as the liquid height of the first slurry pool, and the liquid level heights of the two slurry pools are the same, ensuring the liquid level balance in the two-stage reaction pools and keeping the pH value stable.

[0027] refer to Figure 1-2 As shown, in a preferred embodiment, a second spray mechanism is provided in the second reaction chamber, the second spray mechanism includes a second spray unit 8, at least three second spray units 8 are provided, each spray unit is arranged at intervals, and the second spray unit 8 sprays in the opposite direction toward the bottom slurry pool in the second reaction chamber. The second spray unit 8 performs secondary spray desulfurization on the flue gas treated in the first reaction chamber in the second gas reaction chamber.

[0028] refer to Figure 1-2 As shown, in a preferred embodiment, the second spray unit 8 includes a high-pressure nozzle 81 and a smoke extractor 82. The high-pressure nozzle 81 and the smoke extractor 82 are arranged at intervals. There are at least four high-pressure nozzles and at least four smoke extractors. Each high-pressure nozzle 81 and the smoke extractor 82 are arranged in regular intervals, and the air suction direction of each smoke extractor 82 is toward the slurry pool at the bottom. The smoke extractor 82 is used to absorb the smoke gas generated during spraying, further reducing the smoke content in the gas so that the smoke emission meets the standard.

[0029] refer to Figure 1-2 As shown, in a further preferred embodiment, a second stirring mechanism is provided at the bottom of the second slurry pool 22, and the second stirring mechanism includes a first direction agitator 23 and a second direction agitator 24. The first direction agitator 23 is used to stir the lower left part of the second slurry pool 22, and the second direction agitator 24 is used to stir the lower right part of the second slurry pool 22. The two-direction agitators can fully stir the added desulfurizer and other reactants used to treat fixed waste, and then circulate them in the two slurry pools to ensure that the density of the circulating slurry is balanced and the pH value is stable.

[0030] refer to Figure 1-2As shown, in a further preferred embodiment, a first flue gas connecting mechanism is provided on the first reaction mechanism 1, and the first flue gas connecting mechanism includes a first flue gas connecting pipe 14. The first end of the first flue gas connecting pipe 14 is connected to the first gas reaction chamber, and the second end is connected to the lower part of the second reaction chamber. Preferably, an exhaust mechanism for suction can also be provided at the upper position of the first flue gas connecting pipe 14 to suck the treated gas into the next-level processing mechanism for processing.

[0031] refer to Figure 1-2 As shown, in a further preferred embodiment, a second flue gas connecting mechanism is provided on the second reaction mechanism 2, and the second flue gas connecting mechanism includes a second flue gas connecting pipe 25. The first end of the second flue gas connecting pipe 25 is connected to the top position of the second reaction chamber, and the second end is connected to the flue gas treatment device at the front end. Preferably, an exhaust mechanism (not shown) for extracting smoke can also be provided at the connection between the second flue gas connecting pipe 25 and the top position of the second reaction chamber, so as to extract the treated gas and enter the next-level treatment mechanism for treatment.

[0032] The beneficial effects of the utility model are as follows: the utility model provides a desulfurization device, which is provided with a first reaction mechanism and a second reaction mechanism. The first reaction mechanism performs primary treatment on the incoming flue gas, and the second reaction mechanism is used to perform secondary treatment on the incoming flue gas. A flow valve mechanism is provided on the flow cavity on the first reaction mechanism and the second reaction mechanism to ensure the stability of the pH value in the two-stage reaction tower, reduce the slurry density difference and water balance problems, thereby improving the desulfurization and deacidification effects of the flue gas and meeting the emission standards.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0035] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A desulfurization device, characterized in that: It includes a desulfurization reaction mechanism and a density adjustment mechanism arranged on the desulfurization reaction mechanism, the desulfurization reaction mechanism includes a first reaction mechanism and a second reaction mechanism, the first reaction mechanism is connected to the second reaction mechanism, the first reaction mechanism is used to perform primary treatment on the incoming flue gas, and the second reaction mechanism is used to perform secondary treatment on the incoming flue gas, the adjustment mechanism includes a liquid circulation connection piece, the first end of the liquid circulation connection piece is connected to a lower side surface of the first reaction mechanism, the second end of the liquid circulation connection piece is connected to a lower side surface of the second reaction mechanism, the first reaction mechanism and the second reaction mechanism are connected to form a circulation cavity, the circulation cavity is provided with a circulation valve mechanism, the circulation valve mechanism is used to circulate the slurry in the first reaction mechanism and the second reaction mechanism and balance the slurry density in the two-stage mechanism.

2. The desulfurization device according to claim 1, characterized in that: The first reaction mechanism includes a first reaction tower body, a first reaction chamber is formed in the first reaction tower body, a first gas reaction chamber and a first slurry pool are arranged in the first reaction chamber, the height of the first gas reaction chamber is three quarters of the height of the first reaction chamber as a whole, the first slurry pool is the bottom part of the remaining one quarter of the first reaction chamber as a whole, a first stirring mechanism is arranged at the bottom of the first slurry pool, the first stirring mechanism includes a stirrer, and the stirring blades of the stirrer are oriented toward the liquid surface direction of the first slurry pool.

3. The desulfurization device according to claim 1, characterized in that: The circulation valve mechanism includes a liquid circulation valve, and the liquid circulation connecting piece includes a circulation pipe. A first filter is provided at the connection between the first end of the circulation pipe and the first reaction mechanism, and a second filter is provided at the connection port between the second end of the circulation pipe and the second reaction structure. A slurry concentration display is provided on the surface of the circulation pipe, and a slurry concentration sensor is provided at a position in the circulation pipe near the liquid circulation valve.

4. The desulfurization device according to claim 2, characterized in that: A first spray mechanism is provided in the first gas reaction chamber, and the first spray mechanism includes first spray units. The first spray units include at least three groups. Each group of the first spray units is arranged in reverse intervals from the upper position of the first reaction chamber toward the lower part of the first reaction chamber, and the spraying direction of each first spray unit is toward the slurry pool at the bottom of the reaction chamber.

5. The desulfurization device according to claim 1, characterized in that: The second reaction mechanism includes a second reaction tower body, a second reaction chamber is formed in the second reaction tower body, a second gas reaction chamber and a second slurry pool are provided in the second reaction chamber, the second reaction chamber is arranged at the upper part of the second slurry pool, and the capacity height of the second slurry pool is the same as the capacity height of the first slurry pool.

6. The desulfurization device according to claim 5, characterized in that: A second spray mechanism is provided in the second reaction chamber, and the second spray mechanism includes a second spray unit. There are at least three second spray units, each of which is arranged at intervals, and the spraying direction of the second spray unit is in the direction of the bottom slurry pool in the second reaction chamber.

7. The desulfurization device according to claim 6, characterized in that: The second spray unit includes a high-pressure nozzle and a smoker, the high-pressure nozzle and the smoker are arranged at intervals, there are at least four high-pressure nozzles, and there are at least four smokers, each high-pressure nozzle and smoker are arranged in regular intervals, and the air suction direction of each smoker is toward the slurry pool at the bottom.

8. The desulfurization device according to claim 7, characterized in that: A second stirring mechanism is provided at the bottom of the second slurry pool, and the second stirring mechanism includes a first direction stirrer and a second direction stirrer. The first direction stirrer is used to stir the lower left part of the second slurry pool, and the second direction stirrer is used to stir the lower right part of the second slurry pool.

9. The desulfurization device according to claim 1, characterized in that: The first reaction mechanism is provided with a first fume connecting mechanism, which includes a first fume connecting pipe, a first end of which is connected to the first gas reaction chamber, and a second end of which is connected to the lower part of the second reaction chamber.

10. The desulfurization device according to claim 1, characterized in that: The second reaction mechanism is provided with a second smoke connecting mechanism, which includes a second smoke connecting pipe. The first end of the second smoke connecting pipe is connected to the top position of the second reaction chamber, and the second end is connected to the smoke treatment device at the rear end.

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