Integrated device for treating molten salt electrolysis tail gas

Abstract

The utility model discloses an integrated device for treating molten salt electrolysis tail gas, which comprises a main body, a cooling chamber, an absorption chamber, an anti-suck-back chamber and an air return chamber are arranged in the main body, the absorption chamber is arranged at the bottom of the main body and is internally provided with absorption liquid, the cooling chamber is arranged above the absorption chamber in the main body, and the anti-suck-back chamber is arranged in the air return chamber. The air return chamber and the anti-suck-back chamber are located in the cooling chamber, air inlet pipes are arranged at the bottoms of the anti-suck-back chamber and the air return chamber and inserted into the absorption liquid, an air inlet is formed in the top of the anti-suck-back chamber, the cooling chamber is provided with a cooling water inlet and a cooling water outlet, an absorption liquid outlet is formed in the bottom of the absorption chamber, and an absorption liquid injection port and an observation hole are formed in the top of the absorption chamber. The top of the air return chamber is provided with an air outlet pipe; according to the utility model, the integrated design is adopted, so that the installation efficiency of equipment is improved, the manufacturing and maintenance cost is reduced, and the space resource is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of fused salt electrolysis technology, more particularly, the utility model relates to a kind of integrated device for processing fused salt electrolysis tail gas. BACKGROUND

[0002] The core of fused salt electrolysis process (FFC process) is to make metal oxide as cathode, and electrolysis is carried out below the decomposition voltage of fused salt electrolyte, and metal oxide occurs deoxidation reaction to form metal, and O2- removed enters fused salt and migrates to graphite anode to form CO2.

[0003] Compared with traditional chlorination + clough method, FFC process is concerned due to its short process and high metal recovery rate. However, the electrolyte calcium chloride used in FFC process has strong water absorption, and it is difficult to remove crystallization water, and it is easy to hydrolyze to produce HCl gas at high temperature, thereby corroding stainless steel reactor to generate iron-chromium-nickel chlorides, and these metal chlorides will decompose to produce Cl2 at high temperature, and will be gasified at different degrees at high temperature. There are CO2, HCl, Cl2 and metal chloride vapor in the whole reactor. Directly discharging these gases in the air will have a great impact on the environment, and metal chloride vapor is easy to condense at the gas outlet, thereby causing pipeline blockage.

[0004] In the prior art, tail gas is usually treated by using spray tower, but the installation period of spray tower is long, and the occupied area is large, and the sediments generated by acid-base neutralization are easy to block the spray system, and need to stop production when cleaning, which greatly reduces the production efficiency. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a kind of integrated device for processing fused salt electrolysis tail gas, which has small occupied area, is easy to maintain and can continuously work

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] An integrated device for processing fused salt electrolysis tail gas, comprising a main body, a cooling chamber, an absorption chamber, an anti-suckback chamber and a gas return chamber are provided in the main body, wherein the absorption chamber is arranged at the bottom of the main body and the absorption chamber is provided with absorption liquid, the cooling chamber is arranged above the absorption chamber in the main body, the gas return chamber and the anti-suckback chamber are in the cooling chamber, the anti-suckback chamber and the gas return chamber are provided with gas inlet pipes at the bottom and the gas inlet pipes are inserted into the absorption liquid, the anti-suckback chamber is provided with a gas inlet at the top, the cooling chamber is provided with a cooling water inlet and a cooling water outlet, the absorption chamber is provided with an absorption liquid outlet at the bottom and an absorption liquid inlet and an observation hole at the top, and the gas return chamber is provided with a gas outlet pipe at the top.

[0008] The utility model discloses an integrated device for processing molten salt electrolysis tail gas, and a standby anti-suck-back chamber is additionally arranged in the cooling chamber, an air inlet pipe is arranged at the bottom of the standby anti-suck-back chamber and inserted into the absorption liquid, and an air inlet is arranged at the top of the standby anti-suck-back chamber.

[0009] The utility model discloses an integrated device for processing molten salt electrolysis tail gas, and the height of the absorption liquid is located at the half position of the height of the observation hole.

[0010] The utility model discloses an integrated device for processing molten salt electrolysis tail gas, and an air inlet pipe is arranged at the bottom of the cooling chamber.

[0011] The utility model discloses an integrated device for processing molten salt electrolysis tail gas, and the main body is made of acrylic plate.

[0012] The utility model discloses an integrated device for processing molten salt electrolysis tail gas, and the air inlet and the anti-suck-back chamber are connected through bolts.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model adopts integrated design, improves the installation efficiency of equipment, reduces the manufacturing and maintenance cost, saves the space resource, and further enhances the adaptability and flexibility of equipment, improves the reliability of the whole system, makes it can keep running when facing the emergency, thereby reduces the risk of production interruption.

[0015] The utility model will be described in detail in combination with the drawings and examples. DRAWINGS

[0016] The contents expressed by each drawing of the specification and the marks in the drawing will be briefly described as follows:

[0017] Figure 1 It is the schematic view of the utility model;

[0018] Figure 2 It is the top view of the utility model;

[0019] The marks in the drawing are as follows: 1, air inlet; 2, anti-suck-back chamber; 3, air inlet pipe; 4, cooling chamber; 5, air inlet; 6, absorption chamber; 7, partition; 8, air outlet pipe; 9, back gas chamber; 10, standby anti-suck-back chamber; 11, cooling water inlet; 12, cooling water outlet; 13, absorption liquid injection port; 14, absorption liquid discharge port; 15, observation hole. CONCRETE IMPLEMENTATION

[0020] The shape, structure, mutual position and connecting relationship between parts, the function and working principle of each part, manufacturing process and operation and use method of each component involved in the specific implementation of the utility model as described in the following description of the embodiments are further described in detail to help the skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the utility model.

[0021] As Figure 1 shown in a kind of integrated device for processing molten salt electrolysis tail gas, including main body, cooling chamber 4, absorption chamber 6, anti-suckback chamber 2 and back gas chamber 9 are equipped in the main body, wherein absorption chamber 6 is arranged at the bottom of main body and absorption chamber 6 is equipped with absorbing liquid, cooling chamber 4 is arranged in the absorption chamber 6 above in main body, back gas chamber 9 and anti-suckback chamber 2 are in cooling chamber 4, anti-suckback chamber 2 and back gas chamber 9 bottom are equipped with air inlet pipe 3 and air inlet pipe 3 is inserted into absorbing liquid, anti-suckback chamber 2 top is equipped with air inlet 1, cooling chamber 4 is equipped with cooling water inlet 11 and cooling water outlet 12, absorption chamber 6 bottom is equipped with absorbing liquid outlet 14, absorption chamber top is equipped with absorbing liquid inlet 13 and observation hole 15, back gas chamber 9 top is equipped with air outlet pipe 8.

[0022] As Figure 1 shown in cooling chamber 4 is equipped with a standby anti-suckback chamber 10, standby anti-suckback chamber 10 bottom is equipped with air inlet pipe 3 and air inlet pipe 3 is inserted into absorbing liquid, standby anti-suckback chamber 10 top is equipped with air inlet 1.

[0023] As Figure 1 shown in the height of absorbing liquid is located at the position of one half of observation hole 15 height.

[0024] Through the above setting: through experimental accumulation, the observation effect is best when absorbing liquid is in this position, and the data is most accurate.

[0025] As Figure 1 shown in the bottom of air inlet pipe 3 is equipped with air inlet hole 5.

[0026] Through the above setting: absorption chamber 6 air inlet pipe 3 one end is closed, and a plurality of small holes are opened in the lower end of air inlet, which facilitates the dispersion of tail gas in the form of bubbles in absorbing liquid, increases the contact time and contact area of tail gas and absorbing liquid.

[0027] As Figure 1 shown in the main body is made of acrylic plate.

[0028] Through the above setting: acrylic plate is also known as transparent glass, which can increase the observation range of absorbing liquid absorption process.

[0029] As Figure 1 shown in the air inlet 1 and anti-suckback chamber 2 are bolted.

[0030] Through the above setting: air inlet 1 and anti-suck chamber 2 are connected through threads, can be disassembled and cleaned, and maintenance of the device is facilitated.

[0031] Working principle and method

[0032] When the device works, the molten salt electrolysis tail gas enters the anti-suck chamber 2 from the air inlet 1, absorbs heat through the cold water of the cooling chamber, and the impurities in the gas are condensed to the pipe wall, the remaining gas enters the absorption chamber 6 containing the absorption liquid through the air inlet pipe 3, the harmful substances in the tail gas are absorbed, other gases are not dissolved in the absorption liquid or the overflow tail gas passes through the air outlet pipe 8, part of which is discharged into the atmosphere, and the other part enters the gas return chamber 9 and enters the absorption chamber 6 again through the air inlet pipe 3 for secondary absorption. It should be noted that the absorption liquid is generally sodium hydroxide solution, but other solutions can be selected according to different tail gas.

[0033] The utility model has been described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, all of which are within the protection scope of the utility model.

Claims

1. An integrated device for treating molten salt electrolysis tail gas comprising a main body, characterized in that, The main body is internally provided with a cooling chamber, an absorbing chamber, an anti-back suction chamber and a return air chamber, wherein the absorbing chamber is arranged at the bottom of the main body and is internally provided with absorbing liquid, the cooling chamber is arranged above the absorbing chamber in the main body, the return air chamber and the anti-back suction chamber are in the cooling chamber, the bottom of the anti-back suction chamber and the return air chamber is provided with an air inlet pipe which is inserted into the absorbing liquid, the top of the anti-back suction chamber is provided with an air inlet, the cooling chamber is provided with a cooling water inlet and a cooling water outlet, the bottom of the absorbing chamber is provided with an absorbing liquid outlet, the top of the absorbing chamber is provided with an absorbing liquid inlet and an observation hole, and the top of the return air chamber is provided with an air outlet pipe.

2. An integrated device for treating molten salt electrolysis tail gas according to claim 1, characterized in that, The cooling chamber is further internally provided with a standby anti-back suction chamber, the bottom of the standby anti-back suction chamber is provided with an air inlet pipe which is inserted into the absorbing liquid, and the top of the standby anti-back suction chamber is provided with an air inlet.

3. An integrated device for treating molten salt electrolysis tail gas according to claim 1, wherein, The height of the absorbing liquid is located at the position of one half of the height of the observation hole.

4. An integrated device for treating molten salt electrolysis tail gas according to claim 1, characterized in that, The bottom of the air inlet pipe is provided with an air inlet hole.

5. An integrated device for treating molten salt electrolysis tail gas according to claim 1, wherein, The main body is made of acrylic plate.

6. An integrated device for treating molten salt electrolysis tail gas according to claim 1, characterized in that, The air inlet and the anti-back suction chamber are bolted.

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