Hydrogen sulfide gas absorption device for zinc smelting wastewater treatment

Abstract

The utility model discloses a hydrogen sulfide gas absorption device for zinc smelting wastewater treatment, and belongs to the technical field of sewage treatment. Comprising an alkali liquor tank and a spraying tower, a second liquor inlet pipe with a valve is arranged between the alkali liquor tank and the spraying tower in a communicating mode, a second liquor outlet pipe with a valve is arranged at the bottom of the side wall of the alkali liquor tank, the outlet end of the second liquor outlet pipe is communicated with an inlet of an alkali liquor lifting pump, and a third liquor inlet pipe is arranged on an outlet of the alkali liquor lifting pump in a communicating mode. An outlet of the third liquid inlet pipe is provided with a spraying head and located on the upper side in the spraying tower, and a first gas guide pipe is arranged at the bottom of the side wall of the spraying tower. Alkali liquor is lifted by the alkali liquor lifting pump, is sprayed by the spray header and is in full contact with hydrogen sulfide gas under the action of the filler, so that the aim of absorbing toxic and harmful gas of hydrogen sulfide is fulfilled; the concentration of alkali liquor in the alkali liquor tank is regularly monitored to guarantee complete absorption of hydrogen sulfide gas; when the concentration of the alkali liquor is too low, the alkali liquor is fed into a production system, sewage treatment is performed through reaction products, and the purpose of saving auxiliary material consumption is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sewage treatment, specifically relates to a hydrogen sulfide gas absorption device for zinc smelting wastewater treatment. BACKGROUND

[0002] The existing smelting industry sewage treatment is generally using oxidation + sulfuration treatment mode, and sodium sulfide is used as a reagent in the sulfuration process, and hydrogen sulfide toxic and harmful gas is generated in the preparation process, the current used pest control tower system is relatively simple, and the demand of gas collection and treatment cannot be met, therefore, a hydrogen sulfide gas absorption device with better absorption effect needs to be set. UTILITY MODEL CONTENT

[0003] The utility model discloses a hydrogen sulfide gas absorption device with better absorption effect and lower cost, which can absorb hydrogen sulfide gas to the maximum extent, meet the emission standard and reduce the treatment cost.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A hydrogen sulfide gas absorption device for zinc smelting wastewater treatment, comprising a lye tank 1 and a spray tower 8, a second liquid inlet pipe 3 with a valve is arranged in communication between the lye tank 1 and the spray tower 8, a second liquid outlet pipe 5 with a valve is arranged on the side wall bottom of the lye tank 1, the outlet end of the second liquid outlet pipe 5 is communicated with the inlet of a lye lifting pump 6, a third liquid inlet pipe 7 is arranged in communication on the outlet of the lye lifting pump 6, a spray head 9 is arranged on the outlet of the third liquid inlet pipe 7 and located on the upper side inside the spray tower 8, a first gas guide pipe 11 is arranged on the side wall bottom of the spray tower 8, and an air draught fan 12 is arranged on the port of the first gas guide pipe 11.

[0006] A first liquid inlet pipe 2 is further arranged on the upper portion of the lye tank 1.

[0007] A first liquid outlet pipe 4 with a valve is further arranged on the side wall bottom of the lye tank 1.

[0008] A second gas guide pipe 13 is connected to the air draught fan 12.

[0009] A rain cap 10 is arranged on the top outlet of the spray tower 8.

[0010] An anticorrosion layer is arranged on the inner wall of the lye 1, and the spray tower 8, the first gas guide pipe 11 and the second gas guide pipe 13 are all made of glass steel material.

[0011] A plurality of pahl rings are arranged in the lye tank 1.

[0012] As the above technical scheme is adopted, the utility model has the beneficial effects as follows:

[0013] 1. The caustic soda tank is equipped with sodium hydroxide solution, which is continuously lifted to the upper spray head in the spray tower by the caustic soda lifting pump, and the caustic soda is fully contacted with the hydrogen sulfide gas from the first gas guide pipe at the bottom of the spray tower wall under the action of the Pall ring filler, and the hydrogen sulfide gas is almost completely absorbed, which can directly reach the emission standard.

[0014] 2. The caustic soda in the spray tower after absorbing hydrogen sulfide enters the caustic soda tank through the second liquid inlet pipe, and the caustic soda concentration is detected regularly, which can ensure that the hydrogen sulfide gas is completely absorbed.

[0015] 3. The caustic soda in the caustic soda tank after reaction enters the production system sodium sulfide preparation process through the first liquid outlet pipe, which is used for sewage treatment, and achieves the purpose of saving auxiliary material consumption.

[0016] In summary, in use, the caustic soda is lifted by the caustic soda lifting pump, and is sprayed by the spray head, and under the action of the filler, the caustic soda is fully contacted with the hydrogen sulfide gas, and the purpose of absorbing the toxic and harmful hydrogen sulfide gas is achieved; the caustic soda concentration in the caustic soda tank is monitored regularly to ensure complete absorption of the hydrogen sulfide gas; when the caustic soda concentration is too low, it is sent to the production system, and the reaction product is used for sewage treatment, achieving the purpose of saving auxiliary material consumption. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of the utility model is shown in the figure;

[0018] As shown in the figure: caustic soda tank 1;First liquid inlet pipe 2;Second liquid inlet pipe 3;First liquid outlet pipe 4;Second liquid outlet pipe 5;Caustic soda lifting pump 6;Third liquid inlet pipe 7;Spray tower 8;Spray head 9;Rain cap 10;First gas guide pipe 11;Induced draft fan 12. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0021] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0022] Embodiment 1

[0023] As Figure 1 The embodiment provides a hydrogen sulfide gas absorption device for zinc smelting wastewater treatment, which comprises a lye tank 1 and a spray tower 8, a second liquid inlet pipe 3 with a valve is arranged in communication between the lye tank 1 and the spray tower 8, a second liquid outlet pipe 5 with a valve is arranged at the bottom of the side wall of the lye tank 1, the outlet end of the second liquid outlet pipe 5 is communicated with the inlet of a lye lifting pump 6, a third liquid inlet pipe 7 is arranged in communication on the outlet of the lye lifting pump 6, a spray head 9 is arranged at the outlet of the third liquid inlet pipe 7 and located at the upper side inside the spray tower 8 and above the solution, a first gas guide pipe 11 is arranged at the bottom of the side wall of the spray tower 8, and an air draught fan 12 is arranged at the port of the first gas guide pipe 11, and the air draught fan 12 is connected with a second gas guide pipe 13.

[0024] A first liquid inlet pipe 2 is further arranged at the upper portion of the lye tank 1.

[0025] A first liquid outlet pipe 4 with a valve is further arranged at the bottom of the side wall of the lye tank 1. The lye tank 1 is used for collecting the reacted lye, and the lye is introduced into a sodium sulfide preparation process of a production system through the first liquid outlet pipe 4, is used for sewage treatment, and the purpose of saving auxiliary material consumption is achieved.

[0026] A rain cap 10 is arranged at the outlet of the top of the spray tower 8.

[0027] An anticorrosion layer is arranged on the inner wall of the lye 1, the spray tower 8, the first gas guide pipe 11 and the second gas guide pipe 13 are all made of glass steel material, and the service life of the equipment is prolonged.

[0028] A plurality of Pall ring fillers are arranged in the lye tank 1. The Pall ring fillers can fully separate and disperse the lye, and increase the contact area of the lye and the hydrogen sulfide gas.

[0029] In the utility model, the lye arranged in the lye tank 1 is sodium hydroxide solution, the lye is reacted with hydrogen sulfide gas, and the reaction product can be reused for sewage treatment.

[0030] The sodium hydroxide solution in the alkali tank is continuously lifted to the upper spraying head in the inside of the spraying tower by the alkali lifting pump, the alkali is fully contacted with hydrogen sulfide gas coming from the first gas guide pipe at the bottom of the side wall of the spraying tower under the action of the Pall ring filler, and the hydrogen sulfide gas is almost completely absorbed, so that the discharge standard can be directly reached.

[0031] The alkali in the spraying tower after absorbing hydrogen sulfide enters the alkali tank through the second liquid inlet pipe, the alkali concentration is detected regularly, and the hydrogen sulfide gas can be completely absorbed.

[0032] The alkali after reaction is collected in the alkali tank and enters the sodium sulfide preparation process of the production system through the first liquid outlet pipe, is used for sewage treatment, and the purpose of saving auxiliary material consumption is achieved.

[0033] In use, the alkali in the alkali tank is lifted by the alkali lifting pump and is sprayed by the spraying head, the alkali is fully contacted with hydrogen sulfide gas under the action of the filler, the purpose of absorbing the toxic and harmful hydrogen sulfide gas is achieved, the alkali concentration in the alkali tank is regularly monitored, the complete absorption of the hydrogen sulfide gas is ensured, when the alkali concentration is too low, the alkali is sent into the production system, sewage treatment is carried out through reaction products, and the purpose of saving auxiliary material consumption is achieved.

Claims

1. A hydrogen sulfide gas absorption device for zinc smelting wastewater treatment, comprising a lye tank (1) and a spray tower (8), characterized in that, A second liquid inlet pipe (3) with a valve is arranged between the lye tank (1) and the spray tower (8), a second liquid outlet pipe (5) with a valve is arranged at the bottom of the side wall of the lye tank (1), the outlet end of the second liquid outlet pipe (5) is communicated with the inlet of the lye lifting pump (6), a third liquid inlet pipe (7) is arranged in communication with the outlet of the lye lifting pump (6), the outlet of the third liquid inlet pipe (7) is provided with a spray head (9) and located at the upper side of the inside of the spray tower (8), a first air guide pipe (11) is arranged at the bottom of the side wall of the spray tower (8), and an air draught fan (12) is arranged at the port of the first air guide pipe (11).

2. The hydrogen sulfide gas absorption device for zinc smelting wastewater treatment according to claim 1, characterized in that: A first liquid inlet pipe (2) is further arranged at the upper part of the lye tank (1).

3. The hydrogen sulfide gas absorption device for zinc smelting wastewater treatment according to claim 1, characterized in that: A first liquid outlet pipe (4) with a valve is further arranged at the bottom of the side wall of the lye tank (1).

4. The hydrogen sulfide gas absorption device for zinc smelting wastewater treatment according to claim 1, characterized in that: A second air guide pipe (13) is connected to the air draught fan (12).

5. The hydrogen sulfide gas absorption apparatus for zinc smelting wastewater treatment according to claim 1, characterized in that: A rain cap (10) is arranged at the top outlet of the spray tower (8).

6. The hydrogen sulfide gas absorption apparatus for zinc smelting wastewater treatment according to claim 1, characterized in that: An anti-corrosion layer is arranged on the inner wall of the lye tank (1), and the spray tower (8), the first air guide pipe (11) and the second air guide pipe (13) are all made of glass steel.

7. The hydrogen sulfide gas absorption apparatus for zinc smelting wastewater treatment according to claim 1, characterized in that: A plurality of Pall ring fillers are arranged in the lye tank (1).

Images