Primary cooling process for coal gas

A gas and process technology, applied in the direction of gas dust removal, liquid washing gas purification, etc., can solve the problems of high management requirements, high investment costs, easy blockage of heat exchangers, etc., achieve high cooling efficiency, reduce blockage, and improve equipment operating environment Effect

Inactive Publication Date: 2009-12-23
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the cooling of the direct gas cooling tower requires external cooling capacity to cool the gas to the required set temperature, and there are more cooling equipment configured
If the gas volume is 100000m 3 / h, need to configure 146m 2 There are 9 to 11 spiral plate heat exchangers, and the investment cost is relatively high; after the circulating coolant washes the suspended naphthalene in the gas, the heat exchanger is easy to block, and the management requirements are also high

Method used

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  • Primary cooling process for coal gas
  • Primary cooling process for coal gas
  • Primary cooling process for coal gas

Examples

Experimental program
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Effect test

Embodiment 1

[0025] equipment such as image 3 As shown, the horizontal tube primary cooler 1 is connected to the coke oven, and the horizontal tube primary cooler is divided into a circulating water section 11 and a low-temperature cooling water section 12; in the circulating water section, the circulating water heat exchange tube 13 is used for cooling; the low-temperature cooling In the water section, cooling is performed by the low-temperature cooling water heat exchange tube 14 .

[0026] The bottom of the horizontal tube primary cooler is connected with the bottom of the direct cooling tower.

[0027] One or more ammonia water nozzles 21 are installed in the direct cooling tower, and the circulating ammonia water is sprayed into the direct cooling tower by the ammonia water nozzles, passes through the direct cooling tower circulation pump 22 at the bottom, is cooled by the spiral plate heat exchanger 23, and then sprayed through the ammonia water nozzles into the direct cooling towe...

Embodiment 2

[0036] Equipment is with embodiment 1.

[0037] The inlet water temperature of the circulating water section is controlled at 30-33°C, and the raw coal gas coming from the coke oven at 80-85°C is first cooled to 40-45°C through the circulating water section of the horizontal tube primary cooler;

[0038] The inlet water temperature of the low-temperature cooling water section is 16-18°C, and the raw coal gas of 40-45°C is cooled to 20-30°C through the low-temperature cooling water section.

[0039] The direction of circulating water and low-temperature cooling water is opposite to that of raw gas, which is countercurrent cooling.

[0040] Collect the condensate produced when the gas is cooled, and control its tar mass ratio at 3%, add it to the low-temperature cooling water section for spraying, and remove the naphthalene in the gas. Gas volume is 100000m 3 / h, gas condensate replenishment is 1.8m 3 / h. In this step, at least 90% of the naphthalene precipitated by gas cool...

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Abstract

The invention discloses a primary cooling process for coal gas. The process comprises the steps of cooling raw gas to between 20 and 30 DEG C through a horizontal-pipe primary cooler provided with a water- circulating section and a low-temperature water-cooling section, spraying the low-temperature water-cooling section of the horizontal-pipe primary cooler with coal-gas condensate of which the tar proportion is between 2 to 10 percent to remove naphthalene separated out from coal gas, and then spraying the inside of a direct-cooling tower with direct-cooling circulating fluid to wash the coal gas and remove suspended tar and dust carried by the coal gas. The process has the advantages of fully utilizing the characteristics of the high cooling efficiency and good naphthalene removal effect of the horizontal-pipe primary cooler and the good washing effect of the direct-cooling tower to perform effective process combination, performing the cooling, naphthalene removal and dust removal of the coal gas more effectively, reducing the blockage of coal-gas after-purification devices, improving equipment operating environment, saving energy and reducing consumption.

Description

technical field [0001] The present invention relates to a coal gas primary cooling process and a coke oven gas purification process, more specifically to a process that is beneficial to gas naphthalene removal and gas cooling, and removes tar and dust in the gas to the greatest extent, while ensuring gas cooling and washing , optimized the initial gas cooling process, and reduced the one-time investment. Background technique [0002] In the coke oven gas purification process, the raw gas produced by the coke oven has high temperature and large volume, and the gas must be cooled initially before entering the gas blower and the subsequent gas purification device. Common gas primary cooling processes include: horizontal tube primary cooling process, horizontal tube primary cooling or vertical tube primary cooling + direct cooling process. [0003] In the horizontal tube initial cooling process, the raw gas from the coke oven is 80-85°C, and after being cooled by circulating wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/08C10K1/02
Inventor 颜长青任巍张雄文
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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