Device for preparing liquid sulfur dioxide from high-temperature sulfur-containing waste gas

A sulfur dioxide and exhaust gas technology, applied in the fields of sulfur compounds, inorganic chemistry, chemical industry, etc., can solve the problems of no recovery and utilization of flue gas, large volume of desulfurization equipment, increased system energy consumption, etc., to reduce the size of absorption equipment and improve comprehensive Efficiency, the effect of achieving separation

Active Publication Date: 2017-01-04
BEIJING SPC ENVIRONMENT PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not recover and utilize the energy of the flue gas, so it is usually suitable for treating waste gas with low thermal energy grade
At the same time, the content of sulfur dioxide in flue gas treated by traditional absorption methods is generally low, resulting in bulky desulfurization equipment, large amount of desulfurization agent and high loss, which increases the total energy consumption of the system and further increases the cost of the product

Method used

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  • Device for preparing liquid sulfur dioxide from high-temperature sulfur-containing waste gas
  • Device for preparing liquid sulfur dioxide from high-temperature sulfur-containing waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 , a device for preparing liquid sulfur dioxide from high-temperature sulfur-containing waste gas, including a high-efficiency ceramic filter 1, a reboiler 2, a phase-change condenser 3, an absorption tower 4, a circulating pump, an absorption liquid storage tank, and a lean / rich liquid heat exchanger 7 , desorption tower 8, drier 9, gasification condenser 10, compressor 11 and liquid sulfur dioxide storage tank 12.

[0028] Filter 1, reboiler 2, phase change condenser 3, and absorption tower 4 are connected in sequence to form a high-temperature sulfur-containing gas passage. The absorption tower 4, the absorption liquid storage tank 6, the circulation pump 5, the lean / rich liquid heat exchanger 7, and the desorption tower 8 are connected in sequence to form a rich liquid passage. The desorption tower 8, reboiler 2, high temperature circulation pump 51, lean / rich liquid heat exchanger 7, absorption liquid storage tank 61, circulation pump 52, and absor...

Embodiment 2

[0033] Such as figure 2 As shown, the absorption tower adopts a two-stage series structure, that is, the absorption tower 4 and the absorption tower 41 are connected in series. The two absorption towers are respectively connected to an absorption liquid storage tank 6, and are connected to a lean / rich liquid heat exchanger 7 through a circulation pump 5, and the lean / rich liquid heat exchanger 7 is connected to a desorption tower 8 to form a rich liquid passage. The reboiler 2 is connected to the lean / rich liquid heat exchanger 7 through the circulation pump 51, and the lean / rich liquid heat exchanger 7 is connected to the absorption liquid storage tank 61 and respectively connected to the absorption tower through two circulation pumps (circulation pump 52 and circulation pump 53) 4 and absorption tower 41. The sulfur dioxide content in the tail gas is lower than 20mg / Nm 3 . All the other structures are with embodiment 1.

Embodiment 3

[0035] In Embodiment 1, the ammonia gas coming out of the vaporization condenser 10 is returned to the refrigeration section for liquefaction and then recycled. All the other structures are with embodiment 1.

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Abstract

The invention discloses a device for preparing liquid sulfur dioxide from high-temperature sulfur-containing waste gas. The device comprises a filter (1), a reboiler (2), a phase-change condenser (3), an absorption tower (4), a lean / rich liquor heat exchanger (7), a desorption tower (8), a dryer (9), a gasification condenser (10), a compressor (11) and a liquid sulfur dioxide storage tank (12). The device has the advantage that high-temperature properties of the sulfur-containing waste gas are sufficiently utilized, and material flow connection sequences are adjusted, so that the purpose of optimally configuring energy can be achieved; abundant water vapor in the waste gas is preliminarily removed, 'primary thickening' and 'secondary absorbing' modes are adopted for sulfur dioxide, accordingly, the sizes of equipment can be effectively reduced, the mass transfer efficiency can be improved, and the purposes of saving energy and reducing consumption can be achieved; public resources and existing technologies are sufficiently utilized, so that the comprehensive efficiency of systems can be improved.

Description

technical field [0001] The invention belongs to the field of environmental protection and chemical engineering, relates to the utilization of industrial waste gas with high added value, and is especially suitable for the field of preparing liquid sulfur dioxide from high-temperature sulfur-containing waste gas. Background technique [0002] Sulfur dioxide is the main air pollutant. Adsorbent dry desulfurization, such as activated coke desulfurization, is an important means of removing sulfur dioxide. In order to control costs, adsorbents usually need to be regenerated and recycled, and high-temperature desorption is a common regeneration method for adsorbents. The industry generally uses nitrogen as the carrier gas during thermal regeneration. Because the concentration of sulfur dioxide in the generated desorption gas is low, it is often used to prepare dilute sulfuric acid. However, due to the narrow application range of dilute sulfuric acid products, its added value as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/56
CPCC01B17/56Y02P20/10
Inventor 董鹏伟姚常斌周文祥程俊峰张开元
Owner BEIJING SPC ENVIRONMENT PROTECTION TECH
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