Coal gas scrubbing tower

Abstract

The invention relates to a coal gas wash tower which comprises a tower body, wherein the upper part of the tower body is provided with a spray pipe and a gas outlet pipe, the lower part of the tower body is provided with a gas inlet pipe and a water outlet pipe, the side wall at the middle part of a cavity of the tower body is provided with a baffle plate, the baffle plate divides the cavity of the tower body into an upper section and a lower section and is provided with a coal gas channel which is internally provided with a coal gas through hole, the upper end of the coal gas channel above the coal gas through hole is provided with a rising pipe, the side wall at the lower part of the upper section of the cavity of the tower body is provided with the water outlet pipe, the side wall at the upper part of the lower section of the cavity of the tower body is provided with the spray pipe, the lower section of the cavity of the tower body is internally provided with a heat pipe soft water heater, the heat pipe soft water heater comprises vacuum heat pipes and a heating pipe, the vacuum heat pipes are internally provided with liquid heat transfer medium, and the oblique inserted vacuum heat pipes are distributed around the outer side wall of the heating pipe from top to bottom; the outer end of each vacuum heat pipe is arranged in the cavity of the tower body, and the inner end of each vacuum heat pipe is inserted in the heating pipe; the upper part of the heating pipe is provided with a soft water inlet and the lower part is provided with a soft water outlet pipe, and the soft water inlet pipe and the soft water outlet pipe respectively penetrate out of the side wall of the tower body.

Description

technical field [0001] The invention relates to a gas scrubber. Background technique [0002] In the production of synthetic ammonia, a fixed-bed intermittent gas scrubber is used to produce semi-water gas, which includes a tower body with a water spray pipe and an outlet pipe on the upper part of the tower body, and an inlet pipe and an outlet pipe on the lower part of the tower body. The semi-water gas passes through the waste heat. After indirect recovery of heat by the boiler, the temperature is 180-200°C and contains a large amount of unconverted water vapor. Generally, the cooling water is directly sprayed in the empty tower. The gas enters from the bottom of the tower and contacts with the cooling water sprayed on the top of the tower countercurrently. , to achieve the effect of washing and cooling the gas. [0003] 1. Presentation of the question [0004] This traditional scrubber has been widely used in the coal chemical industry for a long time, but there are the...

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Problems solved by technology

[0006] 2. The phase change heat of water vapor contained in the gas cannot be recovered

[0007] 3. The spray gas distribution in the empty tower is uneven, the gas-liquid contact is not good, and the cooling effect of the tower is poor

[0008] 4. The water consumption of the scrubber is large, and the heat load of the circulating cooling water system is heavy

Generally, the hot water out of the gas scrubber is at 70-90°C. The cooling effect of the cooling equipment in winter and summer and the circulating water cooling equipment directly affects the outlet gas temperature. 150T / h of water) needs to be cooled to 30-35°C and put into the tower for recycling. On the one hand, it is a waste of heat energy, and on the other hand, it is the consumption of processing cooling water costs

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