Wet desulphurization emergency slurry adding system

Abstract

The utility model relates to the technical field of wet desulphurization, and discloses a wet desulphurization emergency slurry adding system which comprises a desulfurizing agent slurry tank and an absorption tower, the right side of the desulfurizing agent slurry tank is communicated with a desulfurizing agent slurry pump, and the output end of the desulfurizing agent slurry pump is connected with a desulfurizing agent metering flowmeter. The output end of the desulfurizing agent metering flowmeter is connected with a conventional slurry adding electric valve, the output end of the desulfurizing agent metering flowmeter is connected with an emergency slurry adding electric valve, the output end of the emergency slurry adding electric valve is connected with a desulfurizing slurry circulating pump, and the output end of the desulfurizing slurry circulating pump is connected with a spraying layer. A filtering mechanism is arranged in the absorption tower, and a flue gas inlet is formed in one side of the absorption tower in a communicating manner. The slurry adding device solves the problems that in the prior art, when SO2 at an inlet changes, the reaction of a traditional slurry adding mode is lagged and inaccurate, and emission of a desulfurization system is prone to exceeding the standard for a short time.

Description

Technical Field

[0001] The utility model relates to the technical field of wet desulfurization, in particular to a wet desulfurization emergency slurry adding system. Background Technique

[0002] In wet desulfurization, flue gas enters from the middle of the absorption tower, and the desulfurizer slurry is atomized and sprayed into the absorption tower from the upper part through a nozzle, contacting the flue gas countercurrently. CaSO3·1 / 2H2O and CO2 are generated in the tower, and the CaSO3·1 / 2H2O, O2, and H2O falling into the slurry pool of the absorption tower are further subjected to an oxidation reaction to obtain the by-product CaSO4·2H2O.

[0003] During boiler combustion, due to fuel changes, it is easy to cause fluctuations in the SO2 concentration of the flue gas entering the absorption tower. Operators often increase the supply of desulfurizer slurry to control the fluctuations in the SO2 concentration in a short time. Generally, on the market, the supply of desulfurizer slurry is to pump the desulfurizer stored in the slurry tank into the slurry pool of the desulfurization tower through a desulfurizer slurry pump. After the newly added desulfurizer slurry is mixed with the slurry after the reaction in the tower, it enters the desulfurization tower circulation pump, and is sent to the spray layer at the upper part of the desulfurization tower by the circulation pump, and is atomized and sprayed through the nozzle to remove SO2 in the flue gas.

[0004] The "fresh" desulfurization slurry first enters the slurry pool for stirring and mixing and "dilution" before entering the spray device through the circulation pump. When dealing with such sudden fluctuations in the inlet SO2, the above traditional slurry adding method has a lagging and inaccurate reaction, and it is easy to cause short-term over-standard emissions of the desulfurization system.

[0005] Therefore, we propose a wet desulfurization emergency slurry adding system to solve the problem. Content of the Utility Model

[0006] The purpose of the utility model is to provide a wet desulfurization emergency slurry adding system to solve the problems put forward in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a wet desulfurization emergency slurry adding system, including a desulfurizer slurry tank and an absorption tower. A desulfurizer slurry pump is connected and arranged on the right side of the desulfurizer slurry tank. The output end of the desulfurizer slurry pump is connected with a desulfurizer metering flowmeter. The output end of the desulfurizer metering flowmeter is connected with a conventional slurry adding electric valve. The output end of the desulfurizer metering flowmeter is connected with an emergency slurry adding electric valve. The output end of the emergency slurry adding electric valve is connected with a desulfurization slurry circulation pump. The output end of the desulfurization slurry circulation pump is connected with a spray layer. A filtering mechanism is arranged in the absorption tower. A flue gas inlet is connected and arranged on one side of the absorption tower.

[0008] Preferably, the filtering mechanism includes a mounting frame disposed inside the absorption tower. A filter plate is fixedly connected to the inner wall of the mounting frame. A support frame is fixedly connected to the inner wall of the absorption tower. A sealing gasket is fixedly connected to the upper part of the support frame. A positioning groove is formed in the inner wall of the absorption tower. A positioning post is slidably connected to the inner wall of the positioning groove. The upper part of the absorption tower is rotatably connected to a rotating rod through a bearing. One end of the rotating rod is movably connected to a clamping rod. A limiting block is fixedly connected to the upper part of the clamping rod. A spring is fixedly connected to the upper part of the rotating rod.

[0009] Preferably, the spray layer extends into the absorption tower.

[0010] Preferably, there are two desulfurizing agent slurry pumps, both of which are communicatively connected to the desulfurizing agent slurry tank. Through the cooperation of the desulfurizing agent slurry tank, desulfurizing agent slurry pumps, desulfurizing agent metering flowmeter, normal slurry addition electric valve, emergency slurry addition electric valve, desulfurized slurry circulation pump, spray layer, and absorption tower, the problem of lag in the regulation reaction of outlet SO2 can be solved. At the same time, the desulfurizing absorbent can complete the reaction from feeding to atomized spraying in the fastest 10s - 15s, and the concentration of the effective desulfurizing agent after atomized spraying is high, the reaction efficiency is higher, the system is simple, the investment and operation cost is low, and it is safe and reliable.

[0011] Preferably, the positioning post is fixedly connected to the mounting frame.

[0012] Preferably, one end of the spring away from the rotating rod is fixedly connected to the limiting block. The clamping rod is clamped with the clamping groove. The discharged gas can be further filtered through the filter plate, thereby preventing the waste gas from polluting the air. Through the cooperation of the mounting frame, filter plate, positioning groove, positioning post, support frame, sealing gasket, rotating rod, clamping rod, spring, and clamping groove, it is convenient for manual disassembly of the mounting frame, thereby facilitating manual cleaning of the filter plate fixedly connected inside the mounting frame, and preventing the filter holes of the filter plate from being blocked, which affects the filtering effect of the filter plate.

[0013] Preferably, there are four positioning posts, which are equidistantly distributed outside the mounting frame.

[0014] The present invention provides a wet desulfurization emergency slurry addition system. The wet desulfurization emergency slurry addition system has the following beneficial effects:

[0015] (1) With the action of the desulfurizing agent slurry tank, desulfurizing agent slurry pumps, desulfurizing agent metering flowmeter, normal slurry addition electric valve, emergency slurry addition electric valve, desulfurized slurry circulation pump, spray layer, and absorption tower, the wet desulfurization emergency slurry addition system can solve the problem of lag in the regulation reaction of outlet SO2. At the same time, the desulfurizing absorbent can complete the reaction from feeding to atomized spraying in the fastest 10s - 15s, and the concentration of the effective desulfurizing agent after atomized spraying is high, the reaction efficiency is higher, the system is simple, the investment and operation cost is low, and it is safe and reliable;

[0016] (2) The wet desulfurization emergency slurry addition system can further filter the discharged gas through the filter plate, thereby preventing the waste gas from polluting the air. Under the action of the installation frame, filter plate, positioning groove, positioning column, support frame, sealing gasket, rotating rod, clamping rod, spring, and clamping groove, it is convenient for manual disassembly of the installation frame, and thus convenient for manual cleaning of the filter plate fixedly connected inside the installation frame, preventing the filter holes of the filter plate from being blocked and affecting the filtering effect of the filter plate. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall system structure of the present utility model;

[0018] Figure 2 It is a schematic diagram of the filtering mechanism structure of the present utility model;

[0019] Figure 3 It is a schematic diagram of the partial structure of the filtering mechanism of the present utility model;

[0020] Figure 4 This is for the present utility model Figure 3 Enlarged view of part A.

[0021] In the figure: 1, desulfurizer slurry tank; 2, desulfurizer slurry pump; 3, desulfurizer metering flowmeter; 4, conventional slurry addition electric valve; 5, emergency slurry addition electric valve; 6, desulfurized slurry circulation pump; 7, spray layer; 8, absorption tower; 9, filtering mechanism; 91, installation frame; 92, filter plate; 93, positioning groove; 94, positioning column; 95, support frame; 96, sealing gasket; 97, rotating rod; 98, clamping rod; 99, spring; 910, clamping groove; 10, flue gas inlet. Detailed Embodiment

[0022] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the detailed embodiment of the present utility model is now described with reference to the accompanying drawings.

[0023] Embodiment 1

[0024] As Figures 1-4 shown, the present utility model provides a technical solution: a wet desulfurization emergency slurry addition system, including a desulfurizer slurry tank 1 and an absorption tower 8. The right side of the desulfurizer slurry tank 1 is connected and provided with a desulfurizer slurry pump 2. The output end of the desulfurizer slurry pump 2 is connected and provided with a desulfurizer metering flowmeter 3. The output end of the desulfurizer metering flowmeter 3 is connected and provided with a conventional slurry addition electric valve 4. The output end of the desulfurizer metering flowmeter 3 is connected and provided with an emergency slurry addition electric valve 5. The output end of the emergency slurry addition electric valve 5 is connected to a desulfurized slurry circulation pump 6. The output end of the desulfurized slurry circulation pump 6 is connected to a spray layer 7. A filtering mechanism 9 is arranged inside the absorption tower 8. A flue gas inlet 10 is connected and arranged on one side of the absorption tower 8.

[0025] In this embodiment, the spray layer 7 extends into the absorption tower 8.

[0026] Furthermore, there are two desulfurization agent slurry pumps 2, both of which are connected to the desulfurization agent slurry tank 1. Through the cooperation of the desulfurization agent slurry tank 1, the desulfurization agent slurry pumps 2, the desulfurization agent metering flowmeter 3, the normal slurry addition electric valve 4, the emergency slurry addition electric valve 5, the desulfurized slurry circulation pump 6, the spray layer 7, and the absorption tower 8, the problem of lag in the regulation reaction of the outlet SO2 can be solved. At the same time, the desulfurization absorbent can be completed from feeding to atomized spraying reaction in as fast as 10s - 15s, and the concentration of the effective desulfurization agent after atomized spraying is high, the reaction efficiency is higher, the system is simple, the investment and operation cost is low, and it is safe and reliable.

[0027] When the system operates normally, the emergency slurry addition electric valve 5 is closed, and the normal slurry addition electric valve 4 is opened. The desulfurization agent stored in the desulfurization agent slurry tank 1 is directly pumped into the desulfurization tower through the desulfurization agent slurry pump 2. The desulfurization agent metering flowmeter 3 plays a metering role. After the desulfurization agent is mixed with the slurry in the desulfurization tower, the mixed desulfurization agent is pumped into the spray layer 7 through the desulfurized slurry circulation pump 6 for desulfurization reaction. When the SO2 concentration in the flue gas fluctuates and rises in a short time due to the change of boiler coal quality, the normal slurry addition electric valve 4 is closed, and the emergency slurry addition electric valve 5 is opened. The slurry passing through the desulfurization agent metering flowmeter 3 is directly pumped into the inlet pipeline of the desulfurized slurry circulation pump 6. The "fresh" unmixed desulfurization agent is directly pumped into the spray layer 7 through the desulfurized slurry circulation pump 6 to participate in the reaction. The reaction time is rapid, and the fluctuating SO2 concentration can be controlled within 10s - 15s to meet the standard discharge and prevent the instantaneous over-standard of the SO2 concentration at the desulfurization outlet.

[0028] Embodiment 2

[0029] On the basis of Embodiment 1, a preferred embodiment of the wet desulfurization emergency slurry addition system provided by the present utility model is as Figures 1 to 4 shown: The filtering mechanism 9 includes a mounting frame 91 arranged in the absorption tower 8. The inner wall of the mounting frame 91 is fixedly connected with a filter plate 92. The inner wall of the absorption tower 8 is fixedly connected with a support frame 95. The upper part of the support frame 95 is fixedly connected with a sealing gasket 96. The inner wall of the absorption tower 8 is provided with a positioning groove 93. The inner wall of the positioning groove 93 is slidably connected with a positioning column 94. The upper part of the absorption tower 8 is rotatably connected with a rotating rod 97 through a bearing. One end of the rotating rod 97 is movably connected with a clamping rod 98. The upper part of the clamping rod 98 is fixedly connected with a limiting block. The upper part of the rotating rod 97 is fixedly connected with a spring 99.

[0030] In this embodiment, the positioning column 94 is fixedly connected with the mounting frame 91.

[0031] Further, one end of the spring 99 away from the rotating rod 97 is fixedly connected to the limiting block, and the clamping rod 98 is clamped with the clamping groove 910. The discharged gas can be further filtered through the filter plate 92, thereby preventing the waste gas from polluting the air. Through the cooperation of the mounting frame 91, the filter plate 92, the positioning groove 93, the positioning column 94, the support frame 95, the sealing gasket 96, the rotating rod 97, the clamping rod 98, the spring 99, and the clamping groove 910, it is convenient for manual disassembly of the mounting frame 91, thereby facilitating manual cleaning of the filter plate 92 fixedly connected inside the mounting frame 91, and preventing the filter holes of the filter plate 92 from being blocked, which affects the filtering effect of the filter plate 92.

[0032] Furthermore, there are four positioning columns 94, which are evenly distributed outside the mounting frame 91.

[0033] When it is necessary to disassemble and clean the filter plate 92, only need to manually pull up the clamping rod 98 to separate the clamping rod 98 from the clamping groove 910, and then manually rotate the rotating rod 97 to make the upper part of the rotating rod 97 away from the positioning column 94. Then, under the action of the positioning column 94 and the positioning groove 93, the support frame 95 can be manually taken out upward, thereby facilitating manual cleaning of the filter plate 92 fixedly connected inside the mounting frame 91, and preventing the filter holes of the filter plate 92 from being blocked, which affects the filtering effect of the filter plate 92.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet desulfurization emergency slurry system, comprising a desulfurization agent slurry tank (1) and an absorption tower (8), characterized in that: The right side of the desulfurizing agent slurry tank (1) is connected to a desulfurizing agent slurry pump (2), the output end of the desulfurizing agent slurry pump (2) is connected to a desulfurizing agent metering flowmeter (3), the output end of the desulfurizing agent metering flowmeter (3) is connected to a conventional slurry adding electric valve (4), the output end of the desulfurizing agent metering flowmeter (3) is connected to an emergency slurry adding electric valve (5), the output end of the emergency slurry adding electric valve (5) is connected to a desulfurizing agent slurry circulating pump (6), the output end of the desulfurizing agent slurry circulating pump (6) is connected to a spray layer (7), a filtering mechanism (9) is arranged in the absorption tower (8), one side of the absorption tower (8) is connected to a flue gas inlet (10), the filtering mechanism ( 9) comprises an installation frame (91) arranged in an absorption tower (8), the inner wall of the installation frame (91) is fixedly connected to a filter plate (92), the inner wall of the absorption tower (8) is fixedly connected to a support frame (95), the upper part of the support frame (95) is fixedly connected to a sealing gasket (96), the inner wall of the absorption tower (8) is provided with a positioning groove (93), the inner wall of the positioning groove (93) is slidably connected to a positioning column (94), the upper part of the absorption tower (8) is rotatably connected to a rotating rod (97) through a bearing, one end of the rotating rod (97) is movably connected to a clamping rod (98), the upper part of the clamping rod (98) is fixedly connected to a limiting block, and the upper part of the rotating rod (97) is fixedly connected to a spring (99).

2. The wet flue gas desulfurization emergency slurry adding system according to claim 1, characterized in that: The spray layer (7) extends into the absorption tower (8).

3. The wet flue gas desulfurization emergency slurry adding system according to claim 1, characterized in that: There are two desulfurizing agent slurry pumps (2), both of which are connected to the desulfurizing agent slurry tank (1).

4. The wet flue gas desulfurization emergency slurry adding system according to claim 2, characterized in that: The positioning column (94) is fixedly connected to the installation frame (91).

5. The wet flue gas desulfurization emergency slurry adding system according to claim 2, characterized in that: One end of the spring (99) away from the rotating rod (97) is fixedly connected to the limit block, and the clamping rod (98) is clamped to the clamping groove (910).

6. The wet flue gas desulfurization emergency slurry adding system according to claim 2, characterized in that: There are four positioning columns (94) which are evenly distributed outside the installation frame (91).

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