CN102478245A - Method for reducing greenhouse effect and treating F23 in difluoro-methane chloride production through environmentally-friendly burning - Google Patents

Abstract

The invention discloses a method for reducing the greenhouse effect and treating F23 in difluoro-methane chloride production through environmentally-friendly burning. The treatment method comprises the steps such as buffering, mixing, burning, cooking, neutralizing, discharging and the like and specifically comprises the following steps: passing F23 tail gas produced in the F22 production process through a buffer tank, weighing the F23 tail gas with a flow meter, and then feeding the waste gas into a burning furnace from the tangent line direction to be mixed with fuel gas H2 and air; burning the mixed waste gas in extremely short time, wherein the temperature of the burning chamber is maintained to 1100 DEG C-1200 DEG C; generating CO2 and HF through burning F23, deviating CO2 and HF from the burning chamber and then feeding into a quenching recovery device, wherein most of HF gas is cooled and absorbed to obtain a byproduct namely water-containing hydrofluoric acid, and unabsorbed gas is neutralized in a neutralization tower so as to remove trace acidic gas in smoke; and discharging the standard gas after treatment to atmosphere through a chimney. According to the invention, the economic benefit can be improved, and the environmental pollution can be greatly reduced.

Description

A kind of reduction greenhouse effects, the method for F23 during environmental protection burning disposal monochlorodifluoromethane is produced

Technical field

The present invention relates to a kind of to accessory substance F23 safety and environmental protection processing method in the monochlorodifluoromethane production; Be specifically related to a kind of reduction greenhouse effects; The method of F23 during environmental protection burning disposal monochlorodifluoromethane is produced; Can effectively solve problem of environmental pollution, reach the reduction greenhouse effects, the purpose of nontoxic discharging.

Background technology

Monochlorodifluoromethane is a kind of refrigerant, in the process of producing, has accessory substance F23 and produces, and F23 is a kind of destruction atmospheric ozone layer, influences the harmful substance of greenhouse effects, serious environment pollution.The F23 that reclaims can't be in market sale.Can not discharge to atmosphere.

Summary of the invention

Accessory substance F23 is to the influence of atmospheric environment in the difluoro one chloromethane production process in order to solve, and the F23 in the production process is through incinerator burning disposal qualified discharge, and burning the hydrogen fluoride gas that produces has water hydrofluoric acid to sell through water suction production.The present invention both can increase economic efficiency, and can reduce environmental pollution significantly again.

Technical scheme of the present invention is: a kind of reduction greenhouse effects, and the method for F23 during environmental protection burning disposal monochlorodifluoromethane is produced, said processing method comprises steps such as buffering, mixing, burning, cooling, neutralization, discharging, concrete steps are following:

1) buffering: after surge tank, flowmeter metering, get into incinerator by the F23 tail gas that produces in the F22 production process;

2) mix: waste gas gets into from tangential direction, with fuel gas H ₂, air mixes;

3) burning: mixed waste gas is accomplished burning at the utmost point in the short time, chamber temperature remains on 1100 ℃-1200 ℃;

4) cooling neutralization: F ₂₃Generate CO through burning ₂And HF, leaving the combustion chamber and get into the chilling retracting device, most of HF gas is cooled and is absorbed as byproduct water hydrofluoric acid is arranged, and unabsorbed gases is removed the sour gas of trace in the flue gas through the neutralizing tower neutralization;

5). discharging: handle gas after up to standard through smoke stack emission to atmosphere.

Main technique operation index of the present invention:

F23 process for making incineration treatment index:

(1) the incinerator temperature is 1200 ℃

(2) water HF acid content >=30% is arranged

(3) quencher exhanst gas outlet temperature is 30-60 ℃

(4) quencher liquid level 45-55%

(5) discharged wastewater met the national standard index: SS≤70mg/L PH 6-9 F ^-≤10mg/

Main technique operation detection index of the present invention:

The present invention compared with prior art has following advantage:

Because of adopted have strict technology and detect index comprise process method step such as buffering, mixing, burning, cooling, neutralization, discharging; Efficiently solve in the difluoro one chloromethane production process accessory substance F23 to the influence of atmospheric environment; F23 in the production process is through incinerator burning disposal qualified discharge, and burning the hydrogen fluoride gas that produces has water hydrofluoric acid to sell through water suction production.The present invention both can increase economic efficiency, and can reduce environmental pollution significantly again.

Description of drawings

Fig. 1 is a process flow diagram of the present invention:

The specific embodiment

Through non-limiting example, further set forth the present invention below, understand the present invention.

A kind of reduction greenhouse effects of the present invention, the method for F23 during environmental protection burning disposal monochlorodifluoromethane is produced.F in the F22 production process ₂₃After tail gas gets into surge tank, control certain pressure and after the flowmeter metering, send into incinerator, same H ₂, combustion air carries out high temperature incineration, fuel gas H after mixing ₂Provided by chlor-alkali plant, the high-temperature flue gas of generation gets into the graphite quencher by incinerator, completion dissolving and the heat transfer process of HF/HCL gas in the HF/HCL of circulating reflux solution wherein, and the solution after the absorption drains into the HF storage tank after reaching concentration requirement.

Flue gas entering absorption tower through chilling further absorbs HF and HCL gas in the flue gas with deionized water, and after secondary absorbed, flue gas was delivered to smoke stack emission by air-introduced machine, and the CEMS analyzer is arranged in the chimney, to the HF in the flue gas, HCL, NO _X, CO, O ₂Deng carrying out on-line monitoring.

The waste water that neutralizing tower comes out advances sewage-treatment plant and handles the back qualified discharge.Break down F like incinerator ₂₃Get into the storage of liquefying of liquefaction storage system.

Claims (1)

1. one kind is reduced greenhouse effects, and the method for F23 is characterized in that said processing method comprises steps such as buffering, mixing, burning, cooling, neutralization, discharging during environmental protection burning disposal monochlorodifluoromethane was produced, and concrete steps are following:

1) buffering: after surge tank, flowmeter metering, get into incinerator by the F23 tail gas that produces in the F22 production process;

2) mix: waste gas gets into from tangential direction, with fuel gas H ₂, air mixes;

3) burning: mixed waste gas is accomplished burning at the utmost point in the short time, chamber temperature remains on 1100 ℃-1200 ℃;

4) cooling neutralization: F ₂₃Generate CO through burning ₂And HF, leaving the combustion chamber and get into the chilling retracting device, most of HF gas is cooled and is absorbed as byproduct water hydrofluoric acid is arranged, and unabsorbed gases is removed the sour gas of trace in the flue gas through the neutralizing tower neutralization;

5). discharging: handle gas after up to standard through smoke stack emission to atmosphere.

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