Production device for sodium bisulfide continuous absorption reaction

Abstract

The invention discloses a production device, particularly a production device for sodium bisulfide continuous absorption reaction, and belongs to the technical field of chemical engineering production equipment. The invention provides the production device for the sodium bisulfide continuous absorption reaction, which is low in power consumption and production cost and easy in control of product quality. The production device comprises an absorption tower, an absorption column bottoms pump and a sodium bisulfide production solution storage tank, a process tail gas output interface is arranged at the top of the absorption tower, a process absorption liquid input interface is arranged at the upper part of the absorption tower, a hydrogen sulfide gas input interface is arranged at the lower part of the absorption tower, an input end of the absorption column bottoms pump is connected with the bottom of the absorption tower, and an output end of the absorption column bottoms pup is connected with the process absorption liquid input interface and the sodium hydrosulfide production solution storage tank respectively.

Description

technical field [0001] The invention relates to a production device, in particular to a production device for continuous absorption reaction of sodium hydrosulfide, and belongs to the technical field of chemical production equipment manufacturing. Background technique [0002] The traditional sodium hydrosulfide production process is a batch method. The production device of this method is composed of two or more absorption reactors, vacuum pumps, lye feeding pumps, sodium hydrosulfide solution extraction pumps and other equipment. The absorption liquid is sodium hydroxide solution. In specific production, first add a set amount of sodium hydroxide solution to an absorption reactor, close the relevant valves, start the agitator for stirring, and start the vacuum pump to evacuate. When the vacuum degree reaches the set value, hydrogen sulfide gas is introduced into the reactor, and the reaction is carried out under stirring. When the reaction reaches the later stage, in order...

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Problems solved by technology

[0004] 1. The power consumption is relatively high. The main reason is that firstly, in order to ensure the uniform absorption reaction of hydrogen sulfide and sodium hydroxide in the reactor, the absorption liquid is stirred during the whole absorption process; secondly, hydrogen sulfide is a highly toxic gas. Accidents, causing personnel poisoning and death, so it needs to be carried out under vacuum conditions

The use of stirring and vacuum pumps leads to high power consumption and high cost of the product

[0005] 2. The product quality is not well controlled. Due to the influence of various factors such as hydrogen sulfide gas flow rate change, ambient temperature, stirring speed, vacuum pump, etc., the reaction end point is not easy to control. The reaction product often has excessive sodium sulfide content and needs supplementary absorption.

[0006] 3. It is difficult to realize automatic operation, the number of operators is large, and the waste of labor is serious

Due to many operating steps, frequent start and stop of equipment, and many control points, it is difficult to realize programmed automatic operation. Basically, each step requires human operation.

[0007] 4. Valves, mixing, and pumps are frequently operated, resulting in a high failure rate of equipment and heavy maintenance tasks

[0008] 5. Environmental odor, whether the reactor adopts single or multiple cascaded absorption, hydrogen sulfide cannot be completely absorbed, and the hydrogen sulfide content in the absorption tail gas is relatively high, resulting in odor in the working environment

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