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Double-alkali desulfurization and dedusting recycling device and method thereof

A technology of desulfurization and dust removal and double alkali method, which is applied in the direction of separation methods, chemical instruments and methods, calcium/strontium/barium sulfate, etc., can solve problems such as expensive treatment costs, difficult to handle and utilize desulfurization products, and blockage of pipelines, etc., to achieve reduction Cost, prevention of pipe clogging, and energy saving effects

Inactive Publication Date: 2018-12-18
ANHUI YICAI GLASSWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a kind of dual-alkali desulfurization and dedusting recycling device and method, by reacting the sodium sulfate solution that is not easy to handle and utilize after the reaction with the calcium hydroxide solution to generate calcium sulfate and sodium hydroxide solution, the calcium sulfate is processed Solid recovery, the sodium hydroxide solution is recycled, used to solve the problems in the background technology that the desulfurization products are not easy to handle and utilize, the pipeline is blocked, and the processing cost is expensive

Method used

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  • Double-alkali desulfurization and dedusting recycling device and method thereof
  • Double-alkali desulfurization and dedusting recycling device and method thereof
  • Double-alkali desulfurization and dedusting recycling device and method thereof

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Embodiment 1

[0021] Such as Figure 1-3 As shown, a dual-alkali method desulfurization and dust removal recycling device includes a desulfurization tower 1, the desulfurization tower 1 is connected to the dust removal chamber 2, the dust removal chamber 2 is connected to the flue gas inlet 3, and a nozzle 101 is arranged on the top of the desulfurization tower 1, and the nozzle 101 is connected through a water pipe 4 Sodium hydroxide box 5, a solution recovery pool 6 is set at the bottom of the spray tower 1, and the solution recovery pool 6 is connected to the reaction pool 7, and the reaction pool 7 is connected to the calcium hydroxide box 8 and the treatment box 9, and the treatment box 9 is connected to the sodium hydroxide box 5.

[0022] In this embodiment, the reaction tank 7 is divided into a reaction zone 701, a precipitation zone 702, and a circulation zone 703. In the reaction zone 701, the calcium sulfate produced by the reaction of sodium hydroxide solution and sulfur dioxide ...

Embodiment 2

[0028] A dual-alkali desulfurization and dedusting recycling method, the steps are as follows: Step 1, flue gas dedusting, after the flue gas is discharged, it is dedusted through a dust removal box, and the dedusted flue gas enters a desulfurization tower for desulfurization; Step 2, wet desulfurization Desulfurization, through wet alkaline desulfurization, use sodium hydroxide solution to spray the solution on the top of the desulfurization tower to react with the sulfide in the flue gas in the desulfurization tower, and the sulfuric acid solution produced by the reaction falls to the bottom of the desulfurization tower; Step 3, treatment and recovery, desulfurization The sulfuric acid solution produced at the bottom of the tower leads the sulfuric acid solution into the reaction tank through the conduit, and adds calcium hydroxide solution into the reaction tank to make the calcium hydroxide react with the sulfuric acid solution to produce insoluble calcium sulfate. In the re...

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Abstract

The invention discloses a double-alkali desulfurization and dedusting recycling device. The utility model comprises a desulfurization tower, the desulfurization tower is connected to a dust-removal chamber, the dust-removal chamber is connected to a flue gas inlet, a nozzle is arranged on the top of the desulfurization tower, the nozzle is connected to a sodium hydroxide tank through a water pipe,a solution recovery tank is arranged at the bottom of a spray tower, the solution recovery tank is connected to a reaction tank, the reaction tank is connected with a calcium hydroxide tank and a treatment tank, and the treatment tank is connected to the sodium hydroxide tank. The invention also discloses a double-alkali desulfurization and dedusting recycling method. The method comprises the following steps: step one, flue gas dedusting; step two, wet desulfurization; and step three, treatment recycling. The method performs a reaction on a calcium sulfate solution and a sodium hydroxide solution which are difficult to be treated after the reaction to generate calcium sulfate and a calcium hydroxide solution, recovers the solid calcium sulfate, and recycles the sodium hydroxide solution,the desulfurization products are fully utilized, the recycling of the desulfurization material is realized, the energy is saved, pipe blockage can be effectively prevented, the cost is reduced, and the enterprise profits can be increased.

Description

technical field [0001] The invention relates to the technical field of desulfurization and dust removal, in particular to a double alkali method desulfurization and dust removal recycling device and method. Background technique [0002] At present, the environment is getting worse and worse. The country has been advocating the policy of energy saving and emission reduction. It has high requirements on the emission standards of industrial flue gas. Among them, the content of sulfur dioxide in the flue gas is the most. Now the most used desulfurization technology is alkaline desulfurization, alkaline desulfurization The desulfurization material is sodium hydroxide or calcium hydroxide, both of which are used alone. However, when sodium hydroxide is used, because the final product is sodium sulfate, it is not conducive to treatment and utilization, and a large amount of desulfurization materials will be wasted. The cost of desulfurization is high. When calcium hydroxide is used...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/73C01F11/46B01D53/78
CPCB01D53/501B01D53/73B01D2251/304B01D2251/604C01F11/46
Inventor 张金富刘和平
Owner ANHUI YICAI GLASSWARE
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