SU1757712A2 - Device for wet cleaning of gas - Google Patents

Abstract

Use: gas purification from mechanical and chemical impurities and heat utilization of polluted gases from industrial furnaces, boiler units, etc. The invention is equipped with an additional heat exchanger 6 installed in front of the wet-cleaning housing 1 and connected inlet to the outlet of condenser 2, and at the outlet - with the inlet of the second heat exchanger 5 and the hermetic tank 7 of waste water drying, which is connected hydraulically to the wet-cleaning body, and pneumatically - to the gas duct in front of the condenser 2. 1 sludge.

Description

The invention relates to the purification of gases from mechanical and chemical impurities and can be used in the purification and utilization of heat from polluted gases from industrial furnaces, boiler units, etc.

A device for wet gas cleaning is known, comprising a housing for contacting a contaminated gas with a washing liquid, a partitioned-bed condenser and heat exchangers for pre-heating the cleaned gas, one of the heat exchangers connected to the condenser tray, the second heat exchanger inlet input capacitor.

The disadvantage of this device is the low degree of preheating of the purified gas, limited by the temperature of the cooling water and condensate, which at atmospheric pressure does not exceed 80-85 ° C. Thus, the temperature of the heated purified gas cannot be higher than 70-75 ° C, and as a rule does not exceed 40-45 ° C, which may lead to condensation of water vapor on the inner surface of the pipe in winter.

To increase the efficiency of the device, the purified gas must be heated to a higher temperature, decreasing the relative humidity in order to avoid condensation of water vapor in the gas path of the chimney in winter and to improve the dispersion of gases in the atmosphere.

Another disadvantage of such a device is the presence of wastewater, which contains mechanical and chemical impurities trapped in washing water at a wet site.

The aim of the invention is to increase efficiency in operation and reduce energy consumption by increasing the heating temperature of the purified gas and reducing the amount of waste water.

This is achieved by the fact that the proposed device for gas cleaning is supplied with

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but an additional heat exchanger installed at the inlet into the housing and connected at the inlet to the condenser outlet, and at the outlet to the second heat exchanger inlet, and the waste water drying tank connected hydraulically to the lower part of the housing, and pneumatically to the area of the housing in front a capacitor.

The drawing shows a diagram of the device,, -

The device includes a housing 1, a condenser 2 with a partitioned tray 3, a heat exchanger 4 for heating the cleaned gas connected to the tray and a water supply system, a heat exchanger 5 for heating connected to the inlet and outlet of the condenser 2, and an additional heat exchanger 6 mounted on the inlet into the case and connected at the inlet with the outlet of the condenser 2. and at the outlet - with the entrance of the second heat exchanger 5, and the hermetic tank 7 of waste water drying, connected hydraulically with the lower part of the case, and pneumatically - with the area of the case in front of the capacitor.

The device works as follows.

The contaminated gas enters housing 1, where the pretreatment takes place, is saturated with water vapor. The vapor-gas mixture (CG) with a temperature of 50-85 ° C is fed further to the condensation section, while the water flowing through the pipes of the heat exchanger heats up to 45-80 ° C. The CGL is cooled to 20-25 ° C, and the condensate is collected in sections of pan 3. The water in the condenser can be consumed for various heating needs (hot water, heating, make-up, blowing and supply air, etc.).

Part of the heated water is supplied to the heat exchanger 6. where the water is heated to a temperature of 100-150 ° C and fed to the heat exchanger 5, where the heating takes place

CBC to 80-130 ° C, and the cooled water is returned to condenser 2 or to the water supply system. The condensate from the pallet section also enters the heat exchanger 4

for heating the ASG and / or is supplied to the water supply system.

Condensate from another section can also be returned to the wet circuit.

Part of flush water from housing 1

enters the hermetic drying tank

waste water, connected pneumatically

 with body flue in front of the condenser

 2. Due to the discharge existing

in the duct in front of the condenser, the water vapor from the hermetic tank will be sucked off and condensed in the condenser, and the waste water will be dried to dry residue.

The use of the invention will allow to heat the gases leaving the chimney and thereby prevent the condensation of water vapor in the gas path without additional lining, as well as to improve

flue gas dispersion in the atmosphere.

Another significant result of using the proposal is to reduce the amount of wastewater and prevent pollution of water bodies.

Claims (1)

Invention Formula The device for wet gas cleaning according to aut.St. No. 656645, characterized in that, in order to increase efficiency and reduce energy consumption by increasing the temperature of the heated gas and reducing the amount of waste water, it is equipped with an additional heat exchanger installed at the inlet into the housing and connected inlet to the outlet the condenser, and on the outlet - with the entrance of the second heat exchanger and the tank drying the waste water, which is connected hydraulically to the lower part of the housing, and pneumatically - with the area of the housing in front of the condenser. I t f p X UD /. : .., jgs-. ..".-.to...-..