Wet desulphurization slurry adding system

Abstract

The utility model relates to the technical field of wet desulphurization, and discloses a wet desulphurization slurry adding system which comprises a desulfurizing agent slurry tank, a desulfurizing agent slurry pump, a desulfurizing agent metering flowmeter, a conventional slurry adding electric valve, an emergency slurry adding electric valve, a desulfurizing slurry circulating pump, a spraying layer and an absorption tower, and a filtering mechanism is arranged in the desulfurizing agent slurry tank; and the desulfurizing agent slurry tank is connected with the desulfurizing agent slurry pump through a pipeline. By adopting the technology, the problem of lagging of outlet SO2 regulation reaction can be solved, absorbent slurry adding is divided into two paths, one path of emergency slurry adding mode is added, the situation of SO2 concentration fluctuation can be well handled, the reaction from adding of the desulfurization absorbent to atomization spraying reaction can be completed within 10-15 seconds at the soonest, the fluctuating SO2 concentration can be controlled, up-to-standard emission is achieved, the SO2 concentration at a desulfurization outlet is prevented from exceeding the standard instantaneously, and the system is suitable for large-scale popularization and application. And the concentration of the effective desulfurizer after atomization spraying is high, the reaction efficiency is higher, the system is simple, the investment and operation cost is low, and safety and reliability are achieved.

Description

Technical Field

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

[0002] In wet desulfurization, the flue gas enters from the middle of the absorption tower, and the desulfurizer slurry is sprayed into the absorption tower through the nozzle from the upper part of the absorption tower, and contacts with the flue gas in countercurrent, generating CaSO3·1 / 2H2O and CO2 in the tower, and then oxidizing the CaSO3·1 / 2H2O and O2 and H2O falling into the absorption tower slurry pool to obtain the by-product CaSO4·2H2O. Operating and controlling various parameters within the design range is the main means to ensure the normal chemical reaction in the absorption tower; slurry pH value, slurry density, absorption tower liquid level, oxidation air volume, recycled slurry volume, etc. are the main factors to ensure the normal chemical reaction; limestone slurry supply, gypsum dehydration discharge, wastewater treatment discharge, etc. are the basic conditions for controlling the material balance in the absorption tower and normal reaction. Therefore, controlling the operating parameters within the normal range is the basic principle to ensure that the desulfurization system is in good condition for a long time.

[0003] When the boiler is burning, the SO2 concentration of the flue gas entering the absorption tower may fluctuate due to changes in fuel. Operators often increase the supply of desulfurizer slurry to control the fluctuation of SO2 concentration in a short time. The general supply of desulfurizer slurry on the market is to use a desulfurizer slurry pump to pump the desulfurizer stored in the slurry tank into the desulfurization tower slurry pool. The newly added desulfurizer slurry is mixed with the slurry after reaction in the tower and then enters the desulfurization tower circulation pump, which sends it to the spray layer on the top of the desulfurization tower and uses the nozzle for atomization spray reaction to remove SO2 from the flue gas.

[0004] The "fresh" desulfurization slurry first enters the slurry pool for mixing and "diluting" before entering the spraying device through the circulation pump; when dealing with such sudden fluctuations in the inlet SO2, the above traditional slurry addition method is slow and inaccurate, which can easily cause the desulfurization system to exceed the emission standards in the short term. Therefore, a wet desulfurization slurry addition system is proposed. Utility Model Content

[0005] The utility model aims to provide a wet desulfurization slurrying system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wet desulfurization slurry system, comprising a desulfurizer slurry tank, a desulfurizer slurry pump, a desulfurizer metering flow meter, a conventional slurry adding electric valve, an emergency slurry adding electric valve, a desulfurization slurry circulation pump, a spray layer and an absorption tower, wherein a filtering mechanism is arranged inside the desulfurizer slurry tank;

[0007] The desulfurizer slurry tank is connected to the desulfurizer slurry pump through a pipeline, the desulfurizer slurry pump is connected to the main pipeline, and the output end of the main pipeline is connected to the desulfurization tower. The desulfurizer metering flowmeter, conventional slurry adding electric valve and emergency slurry adding electric valve are all located in the main pipeline. The desulfurizer metering flowmeter is located at the front end of the conventional slurry adding electric valve and the emergency slurry adding electric valve. After the desulfurizer is mixed with the slurry in the desulfurization tower, the mixed desulfurizer is pumped into the spray layer through the desulfurization slurry circulation pump.

[0008] Preferably, two desulfurizer slurry pumps are provided.

[0009] Preferably, the desulfurizer in the desulfurizer slurry tank is directly pumped into the desulfurization tower through a desulfurizer slurry pump, and the desulfurizer metering flowmeter plays a metering role.

[0010] Preferably, the spray layer is located inside an absorption tower, and the absorption tower is provided with a flue gas inlet and a slurry pool liquid level in the tower.

[0011] Preferably, the filtering mechanism comprises a filtering component and a vibrating component;

[0012] The vibration component is located on the surface of the filter component;

[0013] The filter assembly includes a filter screen plate, the filter screen plate is located inside the desulfurizer slurry tank, the filter screen plate is provided with mounting clips on both sides, the two mounting clips are symmetrically arranged, the top surfaces of the two mounting clips are fixedly connected with inclined plates, and the front of the desulfurizer slurry tank is hinged with a baffle;

[0014] The vibration component includes a spring, which is located above the inclined plate. A motor is fixedly connected to the rear side of the desulfurizer slurry box. A rotating rod is arranged below the filter screen plate, and a cam is fixedly arranged on the surface of the rotating rod.

[0015] Preferably, the left and right end faces of the filter screen plate slide through the two side faces of the mounting clamps and extend to the inner sides of the two mounting clamps respectively. The inner wall of the mounting clamp is threadedly connected to the inner wall of the filter screen plate by bolts. The two side faces of the mounting clamps and the side faces of the filter screen plate are slidingly connected to the inner side faces of the desulfurizer slurry tank, so that the filter screen plate can be easily removed from the mounting clamps for cleaning.

[0016] Preferably, the top surface of the inclined plate is fixedly connected to the bottom end surface of the spring, and the top end surface of the spring is fixedly connected to the inner top surface of the desulfurizer slurry tank, so that the filter screen plate vibrates through the action of the spring.

[0017] Preferably, the front end face of the motor output rod passes through the rear side of the desulfurizer slurry box and extends to the interior of the desulfurizer slurry box. The front end face of the motor output rod is fixedly connected to the rear end face of the rotating rod. The front end face of the rotating rod is rotatably connected to the inner wall of the desulfurizer slurry box through a bearing seat, and the rotating rod is driven to rotate by the motor.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the wet desulfurization slurry system adopts this technology to solve the problem of delayed reaction of outlet SO2 regulation. The absorbent slurry is divided into two ways, and an emergency slurry method is added, which can well cope with the fluctuation of SO2 concentration. The desulfurization absorbent can be completed in 10s-15s from addition to atomization spraying, which can control the fluctuating SO2 concentration, meet the emission standards, and prevent the instantaneous excess of SO2 concentration at the desulfurization outlet. The concentration of effective desulfurizer after atomization spraying is high, the reaction efficiency is higher, and the system is simple. , low investment and operating costs, safe and reliable; through the filtering mechanism, the filtering component uses the filter screen to filter the desulfurizer slurry entering the desulfurizer slurry pump to remove impurities in the desulfurizer slurry and ensure the normal operation of the desulfurization system. At the same time, it is convenient to remove the filter screen from the mounting clamp to clean the impurities. The vibration component uses the cam to drive the filter screen to move up and down, and the spring force makes the filter screen vibrate, thereby avoiding blockage of the filter screen, improving the filtering effect of the filter screen, and ensuring the normal operation of the subsequent wet desulfurization slurry system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the wet desulfurization dosing system of the utility model;

[0020] Figure 2 This is a main perspective view of the desulfurizer slurry box of the utility model;

[0021] Figure 3 This is a front cutaway perspective view of the desulfurizer slurry box of the utility model;

[0022] Figure 4 It is a right side sectional stereoscopic view of the rotating rod of the utility model;

[0023] Figure 5 This is a bottom-up stereoscopic view of the filter screen plate of the utility model.

[0024] In the figure: desulfurizer slurry tank 1, desulfurizer slurry pump 2, desulfurizer metering flowmeter 3, conventional slurry adding electric valve 4, emergency slurry adding electric valve 5, desulfurization slurry circulation pump 6, filtering mechanism 7, mounting clamp 701, filter screen plate 702, inclined plate 703, spring 704, baffle 705, motor 706, rotating rod 707, cam 708, spray layer 8. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] See also Figure 1 - Figure 5 The utility model provides a technical solution: a wet desulfurization slurry system, including a desulfurizer slurry tank 1, a desulfurizer slurry pump 2, a desulfurizer metering flow meter 3, a conventional slurry adding electric valve 4, an emergency slurry adding electric valve 5, a desulfurization slurry circulation pump 6, a spray layer 8 and an absorption tower, and a filtering mechanism 7 is arranged inside the desulfurizer slurry tank 1;

[0028] The desulfurizer slurry tank 1 is connected to the desulfurizer slurry pump 2 through a pipeline. The desulfurizer slurry pump 2 is connected to the main pipeline. The output end of the main pipeline is connected to the desulfurization tower. The desulfurizer metering flowmeter 3, the conventional slurry adding electric valve 4 and the emergency slurry adding electric valve 5 are all located in the main pipeline. The desulfurizer metering flowmeter 3 is located at the front end of the conventional slurry adding electric valve 4 and the emergency slurry adding electric valve 5. The desulfurizer is mixed with the slurry in the desulfurization tower and then the mixed desulfurizer is pumped into the spray layer 8 through the desulfurization slurry circulation pump 6. Two desulfurizer slurry pumps 2 are provided. The desulfurizer in the desulfurizer slurry tank 1 is directly pumped into the desulfurization tower through the desulfurizer slurry pump 2. The desulfurizer metering flowmeter 3 plays a metering role. The spray layer 8 is located inside the absorption tower. The absorption tower is provided with a flue gas inlet and a slurry pool liquid level in the tower. This technology can solve the problem of delayed SO2 adjustment reaction at the outlet. The absorbent is added with slurry in two ways, and an emergency slurry addition method is added to cope with the fluctuation of SO2 concentration well. The desulfurization absorbent can be completed from addition to atomization spraying reaction in as fast as 10s-15s, which can control the fluctuating SO2 concentration, meet the emission standards, and prevent the SO2 concentration at the desulfurization outlet from exceeding the standard instantaneously. The concentration of the effective desulfurizer after atomization 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.

[0029] Embodiment 2

[0030] On the basis of Example 1, a preferred embodiment of a wet desulfurization slurrying system provided by the utility model is as follows: Figure 2 - Figure 5 As shown: the filtering mechanism 7 includes a filtering component and a vibrating component;

[0031] The vibration component is located on the surface of the filter component;

[0032] The filter assembly includes a filter screen plate 702, which is located inside the desulfurizer slurry tank 1. Mounting clips 701 are arranged on the left and right sides of the filter screen plate 702. The two mounting clips 701 are symmetrically arranged. The top surfaces of the two mounting clips 701 are fixedly connected with inclined plates 703. A baffle is hinged on the front of the desulfurizer slurry tank 1.

[0033] The vibration assembly includes a spring 704, which is located above the inclined plate 703. A motor 706 is fixedly connected to the rear side of the desulfurizer slurry box 1. A rotating rod 707 is arranged below the filter screen plate 702. A cam 708 is fixedly sleeved on the surface of the rotating rod 707. The left and right end surfaces of the filter screen plate 702 slide through the two sides of the mounting clips 701 and extend to the inner sides of the two mounting clips 701. The inner wall of the mounting clip 701 is threadedly connected to the inner wall of the filter screen plate 702 by bolts. The sides of the two mounting clips 701 and the sides of the filter screen plate 702 are slidably connected to the inner side of the desulfurizer slurry box 1. The top surface of the inclined plate 703 is fixedly connected to the bottom end surface of the spring 704. The top surface of the spring 704 is fixedly connected to the inner top surface of the desulfurizer slurry box 1. The front end surface of the output rod of the motor 706 penetrates the rear side of the desulfurizer slurry box 1 and extends to Inside the desulfurizer slurry box 1, the front end face of the output rod of the motor 706 is fixedly connected to the rear end face of the rotating rod 707, and the front end face of the rotating rod 707 is rotatably connected to the inner wall of the desulfurizer slurry box 1 through the bearing seat. Through the filtering mechanism 7, the filtering component uses the filter screen plate 702 to filter the desulfurizer slurry entering the desulfurizer slurry pump 2 to remove impurities in the desulfurizer slurry and ensure the normal operation of the desulfurization system. At the same time, it is convenient to remove the filter screen plate 702 from the mounting clamp 701 to clean the impurities. The vibration component uses the cam 708 to rotate and drive the filter screen plate 708 to move up and down. The force of the spring 704 causes the filter screen plate 708 to vibrate, thereby avoiding blockage of the filter screen plate 708, improving the filtering effect of the filter screen plate 708, and ensuring the normal operation of the subsequent wet desulfurization slurry adding system.

[0034] Working principle:

[0035] During normal operation, the emergency slurry adding electric valve 5 is closed, and the conventional slurry adding electric valve 4 is opened. The desulfurizer stored in the desulfurizer slurry tank 1 is directly pumped into the desulfurization tower through the desulfurizer slurry pump 2. The desulfurizer metering flowmeter 3 plays a metering role. The desulfurizer is mixed with the slurry in the desulfurization tower and then the mixed desulfurizer is pumped into the spray layer 8 through the desulfurization slurry circulation pump 6 for desulfurization reaction. When the SO2 concentration of the flue gas fluctuates and increases for a short time due to changes in the coal quality of the boiler, the conventional slurry adding electric valve 4 is closed, and the emergency slurry adding electric valve 5 is opened. The slurry passing through the desulfurizer metering flowmeter 3 is directly pumped into the inlet pipe of the desulfurization slurry circulation pump 6, and the "fresh" unmixed desulfurizer is directly passed. The desulfurization slurry circulation pump 6 hits 7 and the spray layer 8 participates in the reaction; the desulfurization agent slurry enters the desulfurization agent slurry box 1, and the filter plate 702 filters the desulfurization agent slurry, and the motor 706 is turned on. The output rod of the motor 706 drives the connected rotating rod 707 to rotate, so that the rotating rod 707 drives the cam 708 to rotate, and the cam 708 squeezes the connected filter plate 702, and the filter plate 702 vibrates under the action of the spring 704; when it is necessary to clean the impurities on the filter plate 702, open the baffle 705, remove the bolts, and then the filter plate 702 can be taken out from the mounting clamp 701, thereby cleaning the impurities on the filter plate 702.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet desulfurization slurry system, comprising a desulfurizer slurry tank (1), a desulfurizer slurry pump (2), a desulfurizer metering flow meter (3), a conventional slurry adding electric valve (4), an emergency slurry adding electric valve (5), a desulfurization slurry circulation pump (6), a spray layer (8) and an absorption tower, characterized in that: The desulfurizing agent slurry tank (1) is provided with a filtering mechanism (7) inside; The desulfurizer slurry tank (1) is connected to the desulfurizer slurry pump (2) through a pipeline, the desulfurizer slurry pump (2) is connected to a main pipeline, and the output end of the main pipeline is connected to a desulfurization tower. The desulfurizer metering flowmeter (3), the conventional slurry adding electric valve (4) and the emergency slurry adding electric valve (5) are all located in the main pipeline, and the desulfurizer metering flowmeter (3) is located at the front end of the conventional slurry adding electric valve (4) and the emergency slurry adding electric valve (5). After the desulfurizer is mixed with the slurry in the desulfurization tower, the mixed desulfurizer is pumped into the spray layer (8) through the desulfurization slurry circulation pump (6).

2. A wet desulfurization slurrying system according to claim 1, characterized in that: The desulfurizing agent slurry pumps (2) are provided with two.

3. A wet desulfurization slurrying system according to claim 1, characterized in that: The desulfurizer in the desulfurizer slurry tank (1) is directly pumped into the desulfurization tower via a desulfurizer slurry pump (2), and the desulfurizer metering flow meter (3) plays a metering role.

4. A wet desulfurization slurrying system according to claim 1, characterized in that: The spray layer (8) is located inside the absorption tower, and the absorption tower is provided with a flue gas inlet and a slurry pool liquid level inside the tower.

5. A wet desulfurization slurrying system according to claim 1, characterized in that: The filtering mechanism (7) comprises a filtering component and a vibrating component; The vibration component is located on the surface of the filter component; The filter assembly comprises a filter screen plate (702), the filter screen plate (702) being located inside the desulfurizing agent slurry tank (1), the filter screen plate (702) being provided with mounting clips (701) on the left and right sides thereof, the two mounting clips (701) being symmetrically arranged, the top surfaces of the two mounting clips (701) being fixedly connected with inclined plates (703), and the front side of the desulfurizing agent slurry tank (1) being hinged with a baffle; The vibration assembly comprises a spring (704), wherein the spring (704) is located above the inclined plate (703); a motor (706) is fixedly connected to the rear side of the desulfurization agent slurry box (1); a rotating rod (707) is arranged below the filter screen plate (702); and a cam (708) is fixedly sleeved on the surface of the rotating rod (707).

6. A wet desulfurization slurrying system according to claim 5, characterized in that: The left and right end surfaces of the filter screen plate (702) respectively slide through the sides of the two mounting clips (701) and extend to the inner sides of the two mounting clips (701); the inner walls of the mounting clips (701) are threadedly connected to the inner walls of the filter screen plate (702) via bolts; the sides of the two mounting clips (701) and the sides of the filter screen plate (702) are slidably connected to the inner sides of the desulfurizer slurry tank (1).

7. A wet desulfurization slurrying system according to claim 5, characterized in that: The top surface of the inclined plate (703) is fixedly connected to the bottom end surface of the spring (704), and the top end surface of the spring (704) is fixedly connected to the inner top surface of the desulfurizing agent slurry tank (1).

8. A wet desulfurization slurrying system according to claim 5, characterized in that: The front end face of the output rod of the motor (706) passes through the rear side of the desulfurizer slurry tank (1) and extends into the interior of the desulfurizer slurry tank (1). The front end face of the output rod of the motor (706) is fixedly connected to the rear end face of the rotating rod (707). The front end face of the rotating rod (707) is rotatably connected to the inner wall of the desulfurizer slurry tank (1) via a bearing seat.

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