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Exhuast gas desulfurization, recycle and treatment method and apparatus

A treatment method, exhaust gas desulfurization technology, applied in separation methods, chemical instruments and methods, calcium/strontium/barium sulfate, etc., can solve the problems of unstable treatment effect, inconvenient transportation, low degree of intensification, etc., and achieve easy movement and transportation, reducing human operations, and high degree of intensification

Inactive Publication Date: 2009-01-14
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are some problems in the above flue gas desulfurization technology and equipment: ①The equipment is bulky, heavy, poor in mobility, and inconvenient to transport; ②The equipment structure is complex, there are many supporting devices, and the degree of intensification is low; Relatively complicated, the treatment effect is unstable; ④ Lack of tail gas treatment equipment, a large amount of CO 2 Gas emissions affect the atmospheric environment and cause waste of resources; ⑤ The gypsum slurry recovery system is not perfect, the recovery quality is poor, and the recovery rate is not high

Method used

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  • Exhuast gas desulfurization, recycle and treatment method and apparatus

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] See attached figure 1 , the exhaust gas is sent to the dust removal device 3 by the exhaust gas inlet pipe 2 of the exhaust gas inlet fan 1 for processing, and the gas after dust removal enters the desulfurization absorption tower 4; the limestone is first sent to the crushing device 5, and then enters the feeding device 6 after being crushed, and then oxidized with the cycle The process water in the device 7 is mixed to form a slurry and collected in the bottom circulation oxidation tank. The process water inlet pump 8 is used to send water to the circulation oxidation device 7, and the agitator 9 is used to mix the limestone slurry for stirring; the limestone slurry is pumped into the desulfurization by the slurry circulation pump 11 In the system 4, the spray device 12 contacts and reacts with the exhaust gas after dedusting, and the generated CaSO 3 Collected in the tank of the bottom circulation oxidation device; the aeration fan 10 is used for the CaSO in the circ...

Embodiment 2

[0055] A pharmaceutical factory uses concentrated sulfuric acid as an oxidant in the production process, and a high concentration of acid gas will be produced during the reaction process. The source of pollution is shown in Table 2.

[0056] Table 2 Pollutant source intensity

[0057] Flue gas emission (Nm 3 / h)

8000

Sulfur dioxide emission concentration (mg / Nm 3 )

76580

Sulfur dioxide emission rate (kg / h)

76.6

Main components of exhaust gas

8.6%SO 2 , 0.7%SO 3 , 4.1% CO 2 , 86.6% air

[0058] The technological process of utilizing the process and equipment of the present invention to carry out flue gas desulfurization and dust removal treatment is as follows:

[0059] (1) Pharmaceutical acid gas first enters the dust removal system and is treated with a bag filter. The dust removal efficiency is about 98%, and the particle concentration is changed from the initial 3000mg / m 3 down to 60mg / m 3 the following....

Embodiment 3

[0066] The installed capacity of a boiler room in a thermal power plant is about 70MW. Coal combustion produces a large amount of sulfur-containing flue gas. The pollution source intensity is shown in Table 3.

[0067] Table 3 Pollutant Source Intensity

[0068] Flue gas emission (Nm 3 / h)

220000

Sulfur dioxide emission concentration (mg / Nm 3 )

1600

Sulfur dioxide emission rate (kg / h)

352

Main components of exhaust gas

1.1%SO 2 , 8.2%CO 2 , 89.5% air, 1.2% other

[0069] The technological process of utilizing the process and equipment of the present invention to carry out flue gas desulfurization and dust removal treatment is as follows:

[0070] (1) The flue gas from the coal-fired boiler enters the dust removal system first, and is processed by an electrostatic precipitator and a bag filter in series. The dust removal efficiency is about 99.5%, and the particle concentration is changed from the initial 16000m...

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Abstract

The invention relates to a smoke gas desulfurization and recycling method; the smoke gas is processed in an smoke desulfurization and recycling integrated device; the smoke gas desulfurization and recycling technology has three stages: a first stage is an exhaust gas dedusting technology, by which particulate matter in the smoke gas is removed; a second stage is an exhaust gas desulfuration technology, by which SO<2> / SO<3> is removed; a third stage is a post-processing technology, by which the exhaust gas is dried and purified and manufactured into a product; and waste seriflux is made into gypsum after being oxidized; the smoke gas desulfurization and recycling method and the device of the invention are suitable for processing the smoke gas containing the SO<2> / SO<3> produced in various industrial production processes and recycling a material, thereby taking full advantage of a resource, decreasing pollutant emission and having the advantages of high processing efficiency, high coefficient of recovery, wide adaptability and smaller investment.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry and environmental protection, and relates to a technical method for flue gas desulfurization treatment and resource utilization of materials, in particular to a method and a device for removing and absorbing sulfur dioxide in waste gas for reuse. Background technique [0002] Sulfur dioxide is one of the main sources of air pollution, endangering the environment and human health. Sulfur dioxide in the atmosphere mainly comes from domestic and industrial pollution sources. Industrial pollution sources mainly include pollution caused by soot, dust, organic compounds and inorganic compounds emitted during the fuel combustion and production processes of industrial and mining enterprises such as iron and steel, chemical industry, coal, thermal power, cement, etc. Generally speaking, these emission sources are relatively concentrated. Moreover, the emission concentration is relatively high, ...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50B01D53/96C01F11/46
Inventor 赵伟荣李华靖郭森
Owner ZHEJIANG UNIV
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