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Process method for co-producing ammonium bicarbonate by using coking plant waste

An ammonium bicarbonate and process method technology, applied in the chemical industry, ammonium carbonate/acid carbonate, sustainable manufacturing/processing, etc., to achieve obvious economic and social benefits, simple process flow, and pollution prevention Effect

Active Publication Date: 2010-10-13
泰安金冠机械工程有限公司
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Problems solved by technology

[0011] In order to solve the above-mentioned technical problems existing in the waste treatment process of existing coking plants using ammonium sulfate process and anhydrous ammonia process, the present invention provides a process method for co-producing solid ammonium bicarbonate by using waste gas and waste water in the coking industry

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  • Process method for co-producing ammonium bicarbonate by using coking plant waste
  • Process method for co-producing ammonium bicarbonate by using coking plant waste

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Embodiment Construction

[0030] The following is based on figure 1 The shown process flow diagram further illustrates the technical solution of the present invention.

[0031] From figure 1 As can be seen:

[0032] Step 1: The waste gas at about 260°C from the chimney goes through heat exchangers 1 and 2 to cool down to 40-50°C step by step, and then divides into two paths. One path passes through the fan 3 and directly enters the gas storage tank 6, and the other path enters the absorption After the tower 4 is washed and attached, it enters the concentration tank 5 for heating and stirring by using the natural pressure difference to increase the CO 2 The concentration of high concentration CO from the concentration tank 5 2 The gas enters the gas holder 6 with a low concentration of CO 2 Gas mixing ready for use;

[0033] The second step: waste liquid treatment process

[0034] Enter the ammonia water tank 21 and 22 for stand-by through distillation by the waste ammonia water of the ammonia dis...

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Abstract

The invention discloses a process method for co-producing ammonium bicarbonate by using coking plant waste, comprising the following steps: exchanging heat of flue gas in a coke oven flue channel to lower the temperature to 40-50 DEG C, absorbing and concentrating by a washing tower to obtain CO2 gas the volume concentration of which is 25%-28%, and lowering the temperature to below 35 DEG C; carrying out distillation pretreatment on coking plant waste ammonia water; and leading the pretreated strong ammonia water and CO2 gas into a synthetic tower to react to generate ammonium bicarbonate. In the invention, waste water and waste gas exhausted by coking industry are fully utilized to synthesize ammonium bicarbonate suitable for the growth of crops, the investment is low no matter a new factory is built or an old factory is transformed, the process is simple, convenient, mature and reliable, the cost is greatly reduced, and the method has higher economic yield. By the comprehensive utilization of waste gas and waste water, the pollution to atmosphere is significantly reduced, thus achieving the purposes of energy saving and emission reduction, being in line with the policy of developing low-carbon economy implemented by China currently, and having great social benefit.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a process method for recovering waste gas and waste water and co-producing solid ammonium bicarbonate in the coking industry. Background technique [0002] During the production process of the coking plant, a large amount of waste gas above 260°C is discharged from the coke oven flue, and a large amount of waste ammonia water is discharged during the ammonia distillation process. The waste ammonia water contains 10 grams of ammonia per cubic meter, and the waste gas contains a volume concentration of 6 -10% CO2 gas, the environmentally friendly treatment of these waste ammonia water and waste gas has always been a bottleneck hindering the development of the coking industry. Waste ammonia and CO in coke oven gas in most coking plants in my country 2 , N and other gases are directly discharged into the atmosphere without recycling, causing serious pollution to the atmosphere and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/26
CPCY02P20/10
Inventor 董继文王克密王鹏张超姚祖国
Owner 泰安金冠机械工程有限公司
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