Desulphurization process by vacuum ammonia method

A vacuum and ammonia process technology, applied in the petroleum industry, combustible gas purification, combustible gas purification/transformation, etc., can solve the problems of complex process, low removal efficiency, high process energy consumption, etc.

Inactive Publication Date: 2008-12-31
马永伟 +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The invention provides a new process for removing ammonia, hydrogen sulfide and hydrogen cyanide in coke oven gas in the coking industry, which solves the probl

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  • Desulphurization process by vacuum ammonia method
  • Desulphurization process by vacuum ammonia method

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Embodiment Construction

[0026] figure 2 Middle: 1. Desulfurization absorption tower, 2. Ammonia washing tower, 3. Ammonia distillation tower, 4. Regeneration tower, 5. Saturator, 6. Acid vapor separator, 7. Circulating spray pump, 8. Rich liquid pump, 9 , concentrated ammonia water pump, 10, residual ammonia water cooler, 11, greedy liquid pump, 12, reboil pump, 13, reboiler, 14, reboil pump, 15, chimney, 16, ammonia vapor cooler, 17, vacuum pump , 18. Ammonia water flow self-regulating valve, 19. Water seal tank, 20. Ammonia vapor condenser, 21. Mixed steam condenser, 22. Water seal tank, 23. Vacuum pump, 24. Acid vapor cooler, 25. Ammonia distillation wastewater pump, 26, ammonia water heat exchanger, 27, greedy rich liquid heat exchanger. 28. Liquid cooler, 29. Flue gas heat exchanger, 30 exhaust fan, 31. Mother liquor tank, 32. Small mother liquor pump

[0027] The patent of the present invention is implemented through the following specific steps: 70,000 m of gas is processed per hour 3 For ...

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PUM

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Abstract

The invention provides a novel process for removing ammonia, H2S and HCN in coke-oven gas in the coking industry, comprising: taking ammonia in coke-oven gas and the residual ammonia water as an alkali source to have reaction with H2S and HCN in the coke-oven gas, then carrying out the resolution in a regeneration tower, removing ammonia in the obtained mixed gas by a saturex firstly, and producing elemental sulfur by the residual sour gas in a Claus furnace. The process is characterized in that: a rich liquid is obtained by utilizing the strong ammonia water obtained by ammonia in the coal gas to have reaction with H2S and HCN in the coal gas under the vacuum state, the tower bottom takes the sensible heat of flue waste gas as a heat source, the resolution is implemented in the regeneration tower under the negative pressure, and the obtained barren solution on the tower bottom is used for rewashing the ammonia. The process has advantages of simple technique, low running cost, investment saving, and high ammonia, H2S and HCN removal efficiency, and is an innovation of ammonia, H2S and HCN removing process in coal gas for coke plants.

Description

Technical field [0001] The invention provides a method that can be widely used in ammonia, H 2 S and HCN removal process. Background technique [0002] In the coking production process, the gas produced contains ammonia, H 2 Gases such as S and HCN. Ammonia gas is severely corrosive to equipment, H 2 S will produce SO when combusted with coke oven gas 2 pollute the atmosphere, and HCN is a highly toxic gas, so these gases must be removed while using coke oven gas for product deep processing, and HCN in the gas 2 The level of S content is a hard index to measure whether a steel factory can process high-quality steel. If the above-mentioned gases in the gas are removed, it will not only solve the above-mentioned problems, but also increase the benefits for the enterprise at the same time. For example, if the ammonia in the gas can be recovered, it can be produced into sulfuric acid or concentrated ammonium water, which can be used as fertilizer. If the H in the gas can b...

Claims

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Application Information

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IPC IPC(8): C10K1/12
Inventor 马永伟李洪钧张继明华祥顾兴林魏盼冬刘向阳
Owner 马永伟
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