Device for preparing acid from metal smelting flue gas

Abstract

The utility model relates to the technical field of flue gas acid making, and discloses a metal smelting flue gas acid making device which comprises a shell, a liquid supply assembly is arranged on the side face of the shell and comprises an infusion pump arranged on the shell, a water inlet pipe is arranged at the upper end of the infusion pump, and the tail end of the water inlet pipe penetrates through the shell and is connected with a spraying assembly; a discharging valve is arranged at the bottom of the shell, an air inlet assembly is arranged at the top of the shell, the air inlet assembly comprises a sealing machine cover arranged on the shell, a booster pump is arranged on the side face of the sealing machine cover, and a three-way pipe is arranged at one end of the booster pump; through cooperative use of the liquid supply assembly, the gas inlet assembly, the stirring assembly and the spraying assembly, flue gas and oxygen are introduced into the sealing hood through the booster pump, so that the flue gas and the oxygen are fully contacted and reacted and enter the gas cavity through the gas guide hole, and the aeration pipe is used for aeration, so that the flue gas is fully contacted with water in the shell, and the reaction rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas acid production, and in particular to a metal smelting flue gas acid production device. Background Art

[0002] "CN 108975284 A" discloses "a novel high-efficiency acid-making device for smelting flue gas, comprising a shell, an air intake hood is arranged on the right side of the shell, a flue gas air intake pipe connected to the air intake hood is arranged on the outer side of the shell, the filter screen is inclined to the lower right, and a dust collecting bin is arranged at the bottom of the support frame corresponding to the filter screen." The flue gas is directly introduced into the shell through the flue gas air intake pipe to mix and react with the oxygen in the shell, and the acidic substance is combined with water by spraying to convert into an acidic solution, so as to realize the acid-making of flue gas. The vertical rotating shaft is driven to drive the stirring rod to stir and mix the oxygen and the flue gas to increase the reaction rate. In addition, the catalyst in the mesh box at the outer end of the stirring rod plays a catalytic role. The vertical suction pipe draws the sulfuric acid with a low concentration at the bottom of the shell into the spray pipe to realize cyclic spraying and increase the concentration of sulfuric acid.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the reaction rate of the acidic substance combined with water is usually slow, and a long reaction time is required to achieve sufficient conversion. The spraying contact surface is small, and the contact reaction cannot be fully achieved, resulting in a low reaction rate.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In order to solve the problem that the reaction rate of acidic substances combining with water is usually slow and a long reaction time is required to achieve sufficient conversion, and the spraying contact surface is small, which cannot fully contact and react, resulting in a low reaction rate, the present application provides a metal smelting flue gas acid production device.

[0006] The present application provides a metal smelting flue gas acid production device adopts the following technical solution:

[0007] A metal smelting fume acid-making device comprises a shell, a liquid supply assembly is arranged on the side of the shell, the liquid supply assembly comprises a liquid pump arranged on the shell, a water inlet pipe is arranged on the upper end of the liquid pump, the end of the water inlet pipe passes through the shell and is connected to a spray assembly, a discharge valve is arranged at the bottom of the shell, an air intake assembly is arranged on the top of the shell, the air intake assembly comprises a sealed machine cover arranged on the shell, a booster pump is arranged on the side of the sealed machine cover, a three-way pipe is arranged at one end of the booster pump, a stirring assembly is arranged on the inner side of the shell, the stirring assembly comprises a stirring shaft rotatably arranged in the shell, a plurality of aeration pipes are arranged at the lower end of the stirring shaft, the upper end of the stirring shaft passes through the shell to reach the sealed machine cover, an impeller is fixedly sleeved on the stirring shaft, an air cavity is arranged on the stirring shaft, and the aeration pipe is communicated with the air cavity.

[0008] Preferably, a three-way valve is provided at the lower end of the liquid pump, one end of the three-way valve is connected to a liquid pumping tube, and the lower end of the liquid pumping tube is connected to the lower end of the shell.

[0009] Preferably, the spray assembly comprises a liquid guiding tube installed in the shell, the liquid pump is connected to the liquid guiding tube, and a plurality of spray heads are arranged at the lower end of the liquid guiding tube.

[0010] Preferably, an air inlet pipe is provided at one end of the booster pump, the booster pump is connected to the inside of the sealed machine cover, the air outlet direction of the sealed machine cover is tangent to the rotation direction of the impeller, one end of the three-way pipe is connected to an external oxygen storage tank, and one end of the three-way pipe is connected to an external flue gas inlet pipe.

[0011] Preferably, a plurality of air guide holes are provided at the upper end of the stirring shaft, the air guide holes are connected to the air cavity, and a plurality of aeration micropores are provided on the aeration pipe.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] Through the coordinated use of the liquid supply component, the air intake component, the stirring component and the spray component, the flue gas and oxygen are introduced into the sealed hood through the booster pump, so that the flue gas and oxygen are fully contacted and reacted, and enter the air cavity through the air guide hole, and are aerated by the aeration pipe, so that they are fully contacted with the water in the shell, thereby increasing the reaction rate. At the same time, the airflow drives the impeller to rotate, so that the stirring shaft and the aeration pipe rotate, and aeration is achieved while stirring, further increasing the reaction rate. The solution is introduced into the liquid guide pipe with the help of the liquid pump, and sprayed by the spray head, thereby further increasing the contact area between the solution and the flue gas, and further promoting the reaction rate. Compared with the existing technology, the reaction rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of a three-dimensional structure from a first-view perspective of an embodiment of the application;

[0015] Figure 2 is a schematic diagram of a second perspective stereoscopic structure of an embodiment of the application;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure from a third perspective of an embodiment of the application.

[0017] Explanation of the reference numerals in the accompanying drawings: 1. Shell; 2. Liquid supply assembly; 201. Liquid pump; 202. Water inlet pipe; 203. Three-way valve; 204. Liquid extraction pipe; 3. Air intake assembly; 301. Sealing hood; 302. Air intake pipe; 303. Booster pump; 304. Three-way pipe; 4. Stirring assembly; 401. Stirring shaft; 402. Impeller; 403. Aeration pipe; 5. Spray assembly; 501. Liquid guide pipe; 502. Spray head; 6. Discharge valve. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-3 This application is described in further detail.

[0019] The present application discloses a metal smelting flue gas acid production device. Figure 1-3 A metal smelting fume acid-making device comprises a shell 1, a liquid supply assembly 2 is installed on the side of the shell 1, the liquid supply assembly 2 comprises a liquid pump 201 installed on the shell 1, a water inlet pipe 202 is installed on the upper end of the liquid pump 201, the end of the water inlet pipe 202 passes through the shell 1 and is connected to a spray assembly 5, the spray assembly 5 comprises a liquid guide pipe 501 installed in the shell 1, the liquid pump 201 is communicated with the liquid guide pipe 501, a plurality of spray heads 502 are installed on the lower end of the liquid guide pipe 501, a discharge valve 6 is installed at the bottom of the shell 1, an air intake assembly 3 is installed on the top of the shell 1, and an air intake assembly 3 is installed on the top of the shell 1. The component 3 includes a sealed machine cover 301 installed on the shell 1, a booster pump 303 is installed on the side of the sealed machine cover 301, a tee pipe 304 is installed on one end of the booster pump 303, a stirring component 4 is installed on the inner side of the shell 1, the stirring component 4 includes a stirring shaft 401 installed in the shell 1 through a bearing, a plurality of aeration pipes 403 are installed at the lower end of the stirring shaft 401, the upper end of the stirring shaft 401 passes through the shell 1 to reach the sealed machine cover 301, an impeller 402 is provided in a fixed sleeve on the stirring shaft 401, an air cavity is provided on the stirring shaft 401, and the aeration pipe 403 is communicated with the air cavity;

[0020] By adopting the above technical solution, the flue gas and oxygen are introduced into the sealed machine cover 301 through the booster pump 303, so that the flue gas and oxygen are fully contacted and reacted, and enter the air cavity through the air guide hole, and aerated by the aeration pipe 403, so that it is fully in contact with the water in the shell 1, thereby improving the reaction rate, and the solution is introduced into the liquid guide pipe 501 with the help of the liquid pump 201, and sprayed by the spray head 502, thereby further increasing the contact area between the solution and the flue gas, and further promoting the reaction rate.

[0021] Reference Figure 2 A three-way valve 203 is installed at the lower end of the liquid pump 201, one end of the three-way valve 203 is connected to a liquid pumping pipe 204, and the lower end of the liquid pumping pipe 204 is connected to the lower end of the housing 1;

[0022] By adopting the above technical solution, in the initial stage, the state of the three-way valve 203 is switched so that the liquid pump 201 is connected to the external water supply equipment to supply water to the shell 1. During the acid production process, the state of the three-way valve 203 is switched so that the water inlet end of the liquid pump 201 and the inside of the shell 1 continuously circulate water to the liquid guide tube 501.

[0023] Reference Figure 1 , an air inlet pipe 302 is installed at one end of the booster pump 303, the booster pump 303 is connected to the inside of the sealed machine cover 301, the air outlet direction of the sealed machine cover 301 is tangent to the rotation direction of the impeller 402, one end of the three-way pipe 304 is connected to the external oxygen storage tank, and one end of the three-way pipe 304 is connected to the external smoke inlet pipe;

[0024] By adopting the above technical solution, the flue gas and oxygen are introduced into the sealed machine cover 301 through the booster pump 303, so that the flue gas and oxygen are fully in contact with each other in the sealed machine cover 301. At the same time, the booster pump 303 increases the air pressure in the sealed machine cover 301, and the reaction rate of the flue gas and oxygen in the sealed machine cover 301 is improved.

[0025] Reference Figure 3 The upper end of the stirring shaft 401 is provided with a plurality of air guide holes, which are connected to the air cavity, and the aeration pipe 403 is provided with a plurality of aeration micropores;

[0026] By adopting the above technical solution, the mixed gas enters the air cavity through the air guide hole and is aerated by the aeration pipe 403, so that it is fully in contact with the water in the shell 1, thereby improving the reaction rate. Since the airflow drives the impeller 402 to rotate, the stirring shaft 401 and the aeration pipe 403 rotate, achieving aeration while stirring, thereby improving the reaction rate.

[0027] The implementation principle of the metal smelting flue gas acid-making device of the present application embodiment is as follows: before acid production, the state of the three-way valve 203 is switched so that the liquid pump 201 is connected to the external water supply device to supply water to the shell 1. When the liquid level is constant, acid production begins. During the acid production process, the state of the three-way valve 203 is switched so that the water inlet end of the liquid pump 201 is connected to the inside of the shell 1, and the liquid guide pipe 501 is continuously supplied with water to realize liquid circulation spraying in the shell 1, and the flue gas and oxygen are introduced into the shell 1 through the booster pump 303. In the sealed machine cover 301, the airflow drives the impeller 402 to rotate, and the flue gas and oxygen fully contact and react in the sealed machine cover 301. The mixed gas enters the air cavity through the air guide hole and is aerated by the aeration pipe 403 to make it fully contact with the water in the shell 1 to increase the reaction rate. Since the airflow drives the impeller 402 to rotate, the stirring shaft 401 and the aeration pipe 403 rotate, achieving aeration while stirring, and increasing the reaction rate. When the sulfuric acid concentration in the solution reaches a certain level, the discharge valve 6 is opened for discharge.

[0028] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0029] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A metal smelting fume acid-making device, comprising a shell (1), a liquid supply assembly (2) being arranged on the side of the shell (1), the liquid supply assembly (2) comprising a liquid pump (201) arranged on the shell (1), a water inlet pipe (202) being arranged at the upper end of the liquid pump (201), the end of the water inlet pipe (202) passing through the shell (1) and connected to a spray assembly (5), a discharge valve (6) being arranged at the bottom of the shell (1), characterized in that: An air intake assembly (3) is arranged at the top of the shell (1), and the air intake assembly (3) comprises a sealed machine cover (301) arranged on the shell (1). A booster pump (303) is arranged on the side of the sealed machine cover (301), and a three-way pipe (304) is arranged at one end of the booster pump (303). A stirring assembly (4) is arranged on the inner side of the shell (1), and the stirring assembly (4) comprises a stirring shaft (401) rotatably arranged in the shell (1). A plurality of aeration pipes (403) are arranged at the lower end of the stirring shaft (401), and the upper end of the stirring shaft (401) passes through the shell (1) to reach the sealed machine cover (301). An impeller (402) is fixedly sleeved on the stirring shaft (401), and an air cavity is arranged on the stirring shaft (401), and the aeration pipe (403) is communicated with the air cavity.

2. The metal smelting fume acid production device according to claim 1, characterized in that: A three-way valve (203) is provided at the lower end of the liquid pump (201), one end of the three-way valve (203) is connected to a liquid pumping tube (204), and the lower end of the liquid pumping tube (204) is in communication with the lower end of the housing (1).

3. The metal smelting fume acid production device according to claim 2, characterized in that: The spray assembly (5) comprises a liquid guide tube (501) installed in the housing (1); the liquid pump (201) is connected to the liquid guide tube (501); and a plurality of spray heads (502) are arranged at the lower end of the liquid guide tube (501).

4. The metal smelting fume acid production device according to claim 3 is characterized by: An air inlet pipe (302) is provided at one end of the booster pump (303), the booster pump (303) is connected to the inside of the sealed machine cover (301), the air outlet direction of the sealed machine cover (301) is tangent to the rotation direction of the impeller (402), one end of the three-way pipe (304) is connected to an external oxygen storage tank, and one end of the three-way pipe (304) is connected to an external smoke inlet pipe.

5. The metal smelting fume sulphuric acid production device according to claim 4, characterized in that: The upper end of the stirring shaft (401) is provided with a plurality of air guide holes, the air guide holes are connected to the air cavity, and the aeration pipe (403) is provided with a plurality of aeration micropores.

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