Continuous dosing device for desulfurization catalyst

Abstract

The utility model relates to a desulfurization catalyst continuous dosing device which comprises a liquid storage tank, a dosing port arranged on the top surface of the liquid storage tank, a turning cover arranged on the dosing port, a water inlet pipe and a tail gas dispersing pipe connected on the top surface of the liquid storage tank, a tail gas treating device connected with the tail gas dispersing pipe, a stirrer arranged inside the liquid storage tank, and a magnetic turning liquid level meter connected outside the liquid storage tank. A steam heating coil is connected to the outer wall of the bottom of the liquid storage tank, a liquid outlet is formed in the bottom end of the liquid storage tank, a compressed air inlet pipe is arranged on one side of the side wall of the bottom of the liquid storage tank, a liquid outlet pipe is arranged on the other side of the side wall and connected with a metering pump, a water outlet pipe of the metering pump is connected with a dosing tank, and the dosing tank is connected with a dosing port in the bottom of the desulfurizing tower. The closed continuous operation is realized, the tail gas volatilization is reduced, the tail gas diffusing pipe is connected with the waste gas treatment device, the environmental pollution is reduced, the labor intensity is reduced, and the safety of workers is improved.

Description

Technical Field

[0001] This utility model belongs to the field of coking desulfurization technology, and specifically relates to a continuous dosing device for desulfurization catalyst. Background Technology

[0002] The coking plant's desulfurization system employs a negative pressure, single-tower wet catalytic oxidation desulfurization process. Coal gas enters the desulfurization tower and comes into countercurrent contact with the sprayed desulfurization liquid to absorb H2S from the coal gas. During absorption, a catalyst needs to be added to the desulfurization liquid. The main component of the desulfurization catalyst is dinuclear titanium cyanide cobalt sulfone decasulfonic acid, a blue-black powder with a particle size less than 20 mesh, 3% water-insoluble matter, and a catalytic activity of 0.06 L / min. Due to its unique chemical structure, it possesses strong oxidizing power, oxidizing S ions to elemental sulfur or polysulfides. Therefore, the addition of the catalyst can improve desulfurization efficiency and reduce the H2S content in the coal gas after the desulfurization tower. However, the following problems exist:

[0003] 1. Currently, the desulfurization catalyst is added at a 5-meter-high platform in the desulfurization tower. The total daily dosage is about 20 kg. Before adding the catalyst, it is necessary to manually stir and dissolve it thoroughly with desulfurization liquid before adding it. The addition is done twice a day, during the day shift and the night shift, which increases the labor intensity of the job.

[0004] 2. During the dosing operation, the reaction in the regeneration section of the desulfurization tower is violent, causing a large amount of foam to overflow into the foam tank. The liquid level fluctuates greatly, resulting in a large amount of foam returning directly to the tower without passing through the sulfur treatment system. This increases the resistance of the desulfurization tower and reduces the desulfurization efficiency.

[0005] 3. After a period of time, the catalytic effect decreases significantly and the H2S index fluctuates, which seriously affects the desulfurization effect. In order to ensure the desulfurization effect, it is necessary to increase the amount of catalyst and increase the cost of reagent consumption. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a continuous dosing device for desulfurization catalysts, which reduces environmental pollution, lowers labor intensity, and improves the safety of workers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A continuous dosing device for desulfurization catalyst includes a storage tank with a dosing port on the top surface of the tank and a flip-top cover. A water inlet pipe and a tail gas vent pipe are connected to the top surface of the tank, and the tail gas vent pipe is connected to a waste gas treatment device. A stirrer is installed inside the storage tank, and a magnetic level gauge is connected to the outside of the storage tank. A steam heating coil is connected to the bottom outer wall of the storage tank, and a drain port is provided at the bottom end of the storage tank. A compressed air inlet pipe is provided on one side of the bottom sidewall of the storage tank, and an outlet pipe is provided on the other side of the sidewall and connected to a metering pump. The outlet pipe of the metering pump is connected to the dosing tank, and the dosing tank is connected to the dosing port at the bottom of the desulfurization tower.

[0009] The bottom of the liquid storage tank is conical.

[0010] The agitator includes a stirring paddle, and a stirring motor is connected to the top of the stirring paddle.

[0011] The metering pump is equipped with a flow meter on its outlet pipe.

[0012] The waste gas treatment device includes a shell, and a filter cloth and activated carbon are installed inside the shell.

[0013] Compared with existing technologies, the beneficial effects of this utility model are:

[0014] 1. The entire set of equipment operates in a closed and continuous manner, reducing the volatilization of exhaust gas. The exhaust gas vent pipe is connected to the waste gas treatment device, which reduces environmental pollution, reduces labor intensity, and improves the safety of workers.

[0015] 2. The agitator in the storage tank works in conjunction with the compressed air at the bottom to stir the desulfurization catalyst evenly.

[0016] 3. A steam heating coil is installed at the bottom of the storage tank to prevent the storage tank from freezing in winter.

[0017] 4. Effectively reduces the backflow of foam into the desulfurization tower, thus delaying the increase in the desulfurization tower resistance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1. Storage tank; 2. Dosing port; 3. Flip-top; 4. Water inlet pipe; 5. Exhaust gas vent pipe; 6. Waste gas treatment device; 7. Agitator; 8. Magnetic level gauge; 9. Steam heating coil; 10. Drain; 11. Compressed air inlet pipe; 12. Discharge pipe; 13. Metering pump; 14. Dosing tank; 15. Desulfurization tower; 16. Flow meter; 61. Shell; 71. Agitator; 72. Agitator motor. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 A continuous dosing device for desulfurization catalyst includes a storage tank 1, a dosing port 2 on the top surface of the storage tank 1, a flip-top cover 3 on the dosing port 2, a water inlet pipe 4 and a tail gas vent pipe 5 connected to the top surface of the tank, the tail gas vent pipe 5 connected to a waste gas treatment device 6, a stirrer 7 inside the storage tank 1, a magnetic level gauge 8 connected to the outside of the storage tank 1, a steam heating coil 9 connected to the bottom outer wall of the storage tank 1, a drain port 10 at the bottom end of the storage tank 1, a compressed air inlet pipe 11 on one side of the bottom side wall of the storage tank 1, and a liquid outlet pipe 12 connected to a metering pump 13 on the other side of the side wall, the water outlet pipe of the metering pump 13 connected to a dosing tank 14, and the dosing tank 14 connected to a dosing port at the bottom of a desulfurization tower 15.

[0023] The bottom of the liquid storage tank 1 is conical.

[0024] The stirrer 7 includes a stirring paddle 71, and a stirring motor 72 is connected to the top of the stirring paddle 71.

[0025] A flow meter 16 is installed on the outlet pipe of the metering pump 13.

[0026] The waste gas treatment device 6 includes a housing 61, and a filter cloth and activated carbon are provided inside the housing 61.

[0027] To make the objectives, technical solutions, and technical effects of this utility model clearer, the technical solutions in the embodiments of this utility model are now described clearly and completely. However, the embodiments described below are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] Example 1

[0029] A continuous dosing device for desulfurization catalyst includes a storage tank 1, a dosing port 2 on the top surface of the storage tank 1, a flap cover 3 on the dosing port 2, a water inlet pipe 4 and a tail gas vent pipe 5 connected to the top surface of the tank, the tail gas vent pipe 5 connected to a waste gas treatment device 6, a stirrer 7 inside the storage tank 1, a magnetic level gauge 8 connected to the outside of the storage tank 1, and a conical bottom. A steam heating coil 9 is connected to the outer wall of the bottom of the storage tank 1, a drain port 10 at the bottom end of the storage tank 1, a compressed air inlet pipe 11 on one side of the bottom sidewall of the storage tank 1, and a liquid outlet pipe 12 on the other side of the sidewall connected to a metering pump 13. The water outlet pipe of the metering pump 13 is connected to a dosing tank 14, which is connected to a dosing port at the bottom of a desulfurization tower 15. A flow meter 16 is installed on the water outlet pipe of the metering pump 13.

[0030] Example 2

[0031] A desulfurization catalyst continuous dosing device includes a storage tank 1, a dosing port 2 on the top surface of the storage tank 1, a flip-top cover 3 on the dosing port 2, a water inlet pipe 4 and a tail gas vent pipe 5 connected to the top surface of the tank, the tail gas vent pipe 5 connected to a waste gas treatment device 6, the waste gas treatment device 6 includes a shell 61, and a filter cloth and activated carbon are provided inside the shell 61.

[0032] The storage tank 1 is equipped with a stirrer 7, which includes a stirring paddle 71 and a stirring motor 72 connected to the top of the stirring paddle 71.

[0033] A magnetic level gauge 8 is externally connected to the storage tank 1, and the bottom of the storage tank 1 is conical. A steam heating coil 9 is connected to the outer wall of the bottom of the storage tank 1. A drain port 10 is provided at the bottom end of the storage tank 1. A compressed air inlet pipe 11 is provided on one side of the bottom side wall of the storage tank 1, and a liquid outlet pipe 12 is provided on the other side of the side wall, which is connected to a metering pump 13. The water outlet pipe of the metering pump 13 is connected to a chemical dosing tank 14, which is connected to a chemical dosing port at the bottom of the desulfurization tower 15. A flow meter 16 is provided on the water outlet pipe of the metering pump 13.

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

Claims

1. A continuous dosing device for desulfurization catalyst, characterized in that, The system includes a storage tank with a dosing port on the top surface and a flip-top cover. A water inlet pipe and a tail gas vent pipe are connected to the top surface of the tank, and the tail gas vent pipe is connected to a waste gas treatment device. An agitator is installed inside the storage tank, and a magnetic level gauge is connected to the outside. A steam heating coil is connected to the bottom outer wall of the storage tank, and a drain port is located at the bottom. A compressed air inlet pipe is located on one side of the bottom sidewall of the storage tank, and an outlet pipe is located on the other side of the sidewall, connecting to a metering pump. The outlet pipe of the metering pump is connected to the dosing tank, and the dosing tank is connected to the dosing port at the bottom of the desulfurization tower.

2. The continuous dosing device for desulfurization catalyst according to claim 1, characterized in that, The bottom of the liquid storage tank is conical.

3. The continuous dosing device for desulfurization catalyst according to claim 1, characterized in that, The agitator includes a stirring paddle, and a stirring motor is connected to the top of the stirring paddle.

4. The continuous dosing device for desulfurization catalyst according to claim 1, characterized in that, The metering pump is equipped with a flow meter on its outlet pipe.

5. A continuous dosing device for desulfurization catalyst according to claim 1, characterized in that, The waste gas treatment device includes a shell, and a filter cloth and activated carbon are installed inside the shell.

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