CN212017289U - High-water-content, peculiar smell-containing and VOCs flue gas treatment system - Google Patents

Abstract

The utility model relates to a flue gas treatment system with high water content, peculiar smell and VOCs (volatile organic compounds), which comprises a dust remover and is suitable for introducing flue gas to be treated; the first flue gas heat exchanger comprises a first flue gas channel and a first water cooling channel, and the first flue gas channel is communicated with a gas outlet of the dust remover; the second flue gas heat exchanger comprises a second flue gas channel and a second water cooling channel, the second flue gas channel is communicated with the first flue gas channel, and the second water cooling channel is communicated with the first water cooling channel; the gas inlet of the activated carbon adsorption bed is communicated with the second flue gas channel; and the fan is arranged on a pipeline at the air outlet of the activated carbon adsorption bed. The effects of reducing humidity and removing peculiar smell of the waste gas with high water content, peculiar smell and VOC are realized.

Description

High-water-content, peculiar smell-containing and VOCs flue gas treatment system

Technical Field

The utility model relates to an environmental protection field, concretely relates to high moisture content, contain peculiar smell and VOCs flue gas treatment system.

Background

The water content of hazardous waste of metal-containing industrial sludge generated in some industrial processes is generally over 60 percent, the hazardous waste needs to be dried to the water content of 30-40 percent before entering a smelting furnace, the hazardous waste is generally dried by adopting a steam indirect drying method, the water in the sludge is taken out by taking air as carrier gas, and the formed flue gas formed by mixing the air and the water is formed.

The moisture content in the flue gas generally reaches more than 40%, and simultaneously, the flue gas generally contains pollution factors such as dust, peculiar smell and a small amount of VOCs, and its emission limit value further reduces along with the improvement of environmental protection new standard, and some original simple processing technology probably can not satisfy the requirement of emission standard, need further optimize processing technology, promote the flue gas and deal with the level to satisfy the requirement of the environmental protection standard that constantly improves.

At present, industrial sludge generates waste gas with high water content and peculiar smell in an indirect drying process, the waste gas is characterized by high water content, peculiar smell and VOCs, corresponding mature equipment is provided for a certain characteristic pollution factor in smoke at present, but the waste gas with high water content, peculiar smell and VOC is treated simultaneously, no precedent exists in the industry at present, and therefore the problem of the waste gas treatment is required to be solved at present.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, and the flue gas treatment system with high water content, peculiar smell and VOCs is provided to solve the inconvenience that the high water content, peculiar smell and VOC waste gas need to be treated separately in the prior art.

The utility model provides a technical scheme that its technical problem adopted is: a flue gas treatment system with high water content, peculiar smell and VOCs comprises

The dust remover is suitable for introducing the flue gas to be treated;

the first flue gas heat exchanger comprises a first flue gas channel and a first water cooling channel, and the first flue gas channel is communicated with a gas outlet of the dust remover;

the second flue gas heat exchanger comprises a second flue gas channel and a second water cooling channel, the second flue gas channel is communicated with the first flue gas channel, and the second water cooling channel is communicated with the first water cooling channel;

the gas inlet of the activated carbon adsorption bed is communicated with the second flue gas channel;

and the fan is arranged on a pipeline at the air outlet of the activated carbon adsorption bed.

Further, the dust remover is an electric dust remover.

Further, the first flue gas heat exchanger and the second flue gas heat exchanger are both counter-flow heat exchangers.

The utility model has the advantages that:

the high-water-content, peculiar-smell-and-VOCs-containing flue gas treatment system is provided, the effects of dehumidification and peculiar smell removal of the high-water-content, peculiar-smell-and-VOC-containing waste gas are achieved, through reasonable process optimization and combination, recycling of partial energy is effectively achieved, and the effects of environmental protection treatment and energy conservation are achieved.

After the high-temperature flue gas is subjected to heat exchange and temperature reduction, a large amount of water is separated out, the moisture content of the flue gas is greatly reduced, meanwhile, the total flue gas amount is correspondingly reduced, and the load and the total emission of subsequent equipment are reduced.

The water cooling channels of the two flue gas heat exchangers are communicated, and after the cooling water in the front exchanges heat with the high-temperature flue gas, the heated hot water can be used as a heat source for subsequent flue gas heating, so that the energy recycling is realized.

The flue gas is separated out the condensate water through the first flue gas heat exchanger, and then the temperature is raised, so that the relative humidity of the flue gas is greatly reduced, the subsequent water accumulation process of the activated carbon adsorption bed layer caused by the temperature reduction of the flue gas is slowed down, the adsorption efficiency is improved, and the service life of the bed layer is prolonged.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a schematic view of the flue gas treatment system of the present invention.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

As shown in figure 1, the flue gas treatment system with high water content, peculiar smell and VOCs comprises a dust remover, a first flue gas heat exchanger, a second flue gas heat exchanger, an activated carbon adsorption bed, a fan and an exhaust funnel.

The dust remover is suitable for introducing smoke with high water content, peculiar smell and VOCs;

the first flue gas heat exchanger comprises a first flue gas channel and a first water cooling channel, and the first flue gas channel is communicated with a gas outlet of the dust remover;

the second flue gas heat exchanger comprises a second flue gas channel and a second water cooling channel, the second flue gas channel is communicated with the first flue gas channel, and the second water cooling channel is communicated with the first water cooling channel;

the gas inlet of the activated carbon adsorption bed is communicated with the second flue gas channel;

and the fan is arranged on a pipeline at the air outlet of the activated carbon adsorption bed.

Specifically, in this embodiment, the dust remover is an electric dust remover.

Specifically, in this embodiment, the first flue gas heat exchanger and the second flue gas heat exchanger are both counter-flow heat exchangers.

The working principle is as follows: high moisture content, contain peculiar smell and VOCs flue gas let in the dust remover earlier, the dust in the desorption flue gas satisfies emission standard's requirement on the one hand, also can reduce the wearing and tearing to follow-up equipment simultaneously.

The flue gas after dust removal enters a first flue gas channel of a first flue gas heat exchanger, and exchanges heat with cooling water introduced into a first water cooling channel, the temperature of the flue gas is reduced, the generated condensed water is discharged from the bottom of the first flue gas heat exchanger, the humidity is reduced, and the cooling water in the first water cooling channel is increased to become hot water;

the flue gas enters a second flue gas channel in the second flue gas heat exchanger, heat exchange is continued with cooling water of the second water-cooling channel, and the cooling water in the second water-cooling channel is hot water from the first water-cooling channel, so that the temperature of the flue gas discharged from the second flue gas channel is increased, the relative humidity of the flue gas is further reduced, and the hot water in the second water-cooling channel is changed into warm water.

Then, the flue gas passes through an activated carbon adsorption bed to remove peculiar smell and VOCs in the flue gas;

and finally, the purified flue gas is sent into an exhaust funnel through a fan to be discharged after reaching the standard.

The following examples are given for illustration purposes:

in the indirect drying process, after moisture is evaporated, hazardous waste containing metal industrial sludge generated in the industrial process and air form flue gas with the temperature of about 100-120 ℃, the moisture content reaches 45%, dust is removed through an electric precipitator and enters a first flue gas heat exchanger, 25 ℃ cooling water introduced into a first water cooling channel exchanges heat, after the heat exchange, the cooling water is heated to 70-80 ℃, and the temperature of the flue gas is reduced to below 50 ℃; the flue gas enters a second flue gas heat exchanger, the water temperature is reduced to 50-60 ℃, the flue gas temperature is increased to 60-65 ℃, and the relative humidity of the flue gas is reduced; the flue gas continues to pass through an activated carbon adsorption bed, peculiar smell and VOCs in the flue gas are removed, and finally the purified flue gas is sent into an exhaust funnel through a fan to reach the standard and be discharged.

The whole process is controlled by a PLC, relevant parameters such as the flow of a water medium in the heat exchanger and the like are automatically adjusted according to actual working condition parameters of smoke, all parameters of the system are guaranteed to run in a normal range, and the whole process is automatically controlled.

The utility model discloses a flue gas treatment system realizes the effect of high moisture content, contain the effect of the dehumidification and the peculiar smell of peculiar smell and VOC waste gas to through reasonable technology optimization combination, effectively realized the recycle of partial energy, have environmental protection treatment and energy-conserving effect concurrently.

After the high-temperature flue gas is subjected to heat exchange and temperature reduction, a large amount of water is separated out, the moisture content of the flue gas is greatly reduced, meanwhile, the total flue gas amount is correspondingly reduced, and the load and the total emission of subsequent equipment are reduced.

The water cooling channels of the two flue gas heat exchangers are communicated, and after the cooling water in the front exchanges heat with the high-temperature flue gas, the heated hot water can be used as a heat source for subsequent flue gas heating, so that the energy recycling is realized.

The flue gas is separated out the condensate water through the first flue gas heat exchanger, and then the temperature is raised, so that the relative humidity of the flue gas is greatly reduced, the subsequent water accumulation process of the activated carbon adsorption bed layer caused by the temperature reduction of the flue gas is slowed down, the adsorption efficiency is improved, and the service life of the bed layer is prolonged.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (3)

1. A high water content, peculiar smell and VOCs flue gas treatment system is characterized by comprising

The dust remover is suitable for introducing the flue gas to be treated;

the first flue gas heat exchanger comprises a first flue gas channel and a first water cooling channel, and the first flue gas channel is communicated with a gas outlet of the dust remover;

the second flue gas heat exchanger comprises a second flue gas channel and a second water cooling channel, the second flue gas channel is communicated with the first flue gas channel, and the second water cooling channel is communicated with the first water cooling channel;

the gas inlet of the activated carbon adsorption bed is communicated with the second flue gas channel;

and the fan is arranged on a pipeline at the air outlet of the activated carbon adsorption bed.

2. The system of claim 1, wherein the dust collector is an electric dust collector.

3. The system of claim 1, wherein the first flue gas heat exchanger and the second flue gas heat exchanger are both counter-flow heat exchangers.

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