CN219356267U - Activated carbon adsorption vacuum desorption condensation recovery system - Google Patents

Abstract

The utility model discloses an activated carbon adsorption vacuum desorption condensation recovery system, which comprises an activated carbon tank, wherein an exhaust pipe of the activated carbon tank is connected with a recovery pipeline through a switching valve, and the recovery pipeline is sequentially provided with a cooler, a vacuum pump group, a condenser, a gas-liquid separator and a solvent storage tank; the active carbon tank comprises a tank body, wherein an active carbon layer is arranged in the tank body, a first tank body and a second tank body are correspondingly arranged at two ends of the tank body, and a heat dissipation tube bundle penetrating through the tank body and the active carbon layer is correspondingly communicated between the first tank body and the second tank body; the inside of the second box body is provided with a baffle plate, and the baffle plate divides the inner cavity of the second box body into a steam inlet cavity and a dead steam collecting cavity with equal volumes. The utility model adopts the modes of vacuum desorption and steam heating to carry out desorption of the activated carbon, and then condensation recovery, solves the problem of low solvent quality caused by easy reaction of the high-temperature solvent of nitrogen when the traditional high-temperature nitrogen desorption is adopted, reduces energy consumption and realizes energy conservation and consumption reduction of enterprises.

Description

Activated carbon adsorption vacuum desorption condensation recovery system

Technical Field

The utility model relates to the technical field of purification and recovery of VOCs, in particular to an activated carbon adsorption vacuum desorption condensation recovery system.

Background

The volatile gas of the organic solvent in the industrial production field is mostly adsorbed by active carbon, wherein a part of the organic solvent has higher recovery value. In the currently adopted activated carbon adsorption equipment, most of activated carbon is used as a disposable adsorption material, namely, the activated carbon is directly treated according to hazardous waste after the adsorption saturation of organic gas. Not only increases the replacement and disposal cost of the activated carbon, but also wastes the value generated after the recovery of the organic solvent.

Aiming at the waste gas treatment needing to recover the solvent, the existing treatment means is an adsorption concentration and nitrogen high-temperature desorption condensation recovery method, and the basic principle is that solvent components are concentrated in active carbon, then the active carbon is purged by high-temperature nitrogen, the solvent components concentrated in the active carbon are desorbed, mixed gas containing solvent steam and high-temperature nitrogen is cooled, the solvent steam is liquefied to obtain a liquid solvent, the purpose of recovering the solvent is achieved, the solvent components condensed in the active carbon are desorbed, the active carbon is purged by high-temperature nitrogen, each component of the solvent is subjected to a high-temperature process, the high-temperature reaction of the solvent is easily caused, the quality of the recovered solvent is certainly reduced, the nitrogen is desorbed at high temperature, the solvent is condensed at low temperature, and the heating and cooling energy consumption is overlarge.

For example, patent publication number CN214320175U discloses a high-temperature nitrogen desorption and condensation recovery device, which comprises a heater, an activated carbon desorption tank, a heat exchanger, a condenser and a circulating fan which are sequentially connected through a nitrogen pipeline; the air outlet of the circulating fan is communicated with the purified cold air inlet of the heat exchanger; a pressure monitoring and purifying system is arranged on the connecting pipeline of the circulating fan and the heat exchanger; the air outlet of the purified hot gas of the heat exchanger is communicated with the air inlet of the heater, and high-temperature nitrogen is adopted to directly purge active carbon, so that high-temperature reaction of the solvent is easy to be initiated.

Disclosure of Invention

The utility model aims to overcome the existing defects, provides an active carbon adsorption vacuum desorption condensation recovery system, adopts a vacuum desorption and steam heating mode to desorb active carbon, and then carries out condensation recovery, thereby solving the problem of low solvent quality caused by easy reaction of a solvent due to high nitrogen temperature when the traditional high-temperature nitrogen desorption is adopted, reducing energy consumption, realizing energy conservation and consumption reduction of enterprises and effectively solving the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the activated carbon adsorption vacuum desorption condensation recovery system comprises an activated carbon tank, wherein an exhaust pipe of the activated carbon tank is connected with a recovery pipeline through a switching valve, and the recovery pipeline is sequentially provided with a cooler, a vacuum pump group, a condenser, a gas-liquid separator and a solvent storage tank;

the active carbon tank comprises a tank body, an active carbon layer is arranged in the tank body, a first tank body and a second tank body are correspondingly arranged at two ends of the tank body, and a heat dissipation tube bundle penetrating through the tank body and the active carbon layer is correspondingly communicated between the first tank body and the second tank body; the inside of the second box body is provided with a baffle plate, the baffle plate divides the inner cavity of the second box body into a steam inlet cavity and a waste steam collecting cavity with equal volumes, and the ports of the heat dissipation tube bundles are symmetrically arranged by taking the baffle plate as a center and are correspondingly communicated with the steam inlet cavity and the waste steam collecting cavity.

Preferably, the vacuum pump set is a plurality of groups of liquid ring type vacuum pumps, the plurality of groups of liquid ring type vacuum pumps are matched with a vacuum pump liquid storage tank, and the vacuum pump liquid storage tank is connected with the solvent storage tank through a pipeline.

Preferably, the activated carbon layer is an activated carbon particle filling layer, a supporting net for supporting the activated carbon layer is arranged in the tank body, and a gland cover arranged on the upper portion of the activated carbon layer is further arranged in the tank body.

Preferably, the steam inlet cavity is communicated with a steam inlet pipe, and the exhaust steam collecting cavity is connected with a condensate water discharge pipe through a drain valve.

Preferably, the condenser is connected with a refrigerator, and the refrigerator provides refrigerant for the condenser.

Compared with the prior art, the utility model has the beneficial effects that: the vacuum pump group is used for vacuumizing the active carbon tank, solvent components adsorbed in the active carbon micropores begin to vaporize along with the reduction of absolute pressure in the tank, the temperature of the active carbon is raised to facilitate solvent vaporization by introducing steam into a heat dissipation tube bundle in the active carbon tank, then the solvent is recovered to a solvent storage tank through a condenser and a separator, the recovery of the solvent is completed, the desorption of the active carbon is carried out by adopting a vacuum desorption and steam-introducing temperature raising mode, and then the condensation recovery is carried out, so that the problem of low solvent quality caused by the fact that the nitrogen temperature is high when the nitrogen is used for desorption in the prior art is solved, the energy consumption is reduced, and the energy conservation and consumption reduction of enterprises are realized.

Drawings

FIG. 1 is a schematic diagram of the present utility model;

fig. 2 is a schematic diagram of the structure of the activated carbon canister of the present utility model.

In the figure: 1 active carbon tank, 1.1 tank body, 1.2 gland, 1.3 heat dissipation tube bundle, 1.4 first tank body, 1.5 supporting net, 1.6 active carbon layer, 1.7 second tank body, 1.71 steam inlet cavity, 1.72 exhaust steam collecting cavity, 2 cooler, 3 vacuum pump group, 4 condenser, 5 refrigerator, 6 gas-liquid separator, 7 vacuum pump liquid storage tank, 8 solvent storage tank.

Description of the embodiments

In the description, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., the drawings merely correspond to the drawings of the present utility model, and in order to facilitate description of the present utility model, it is not indicated or implied that the device or element referred to must have a specific azimuth:

referring to fig. 1-2, the present utility model provides a technical solution: the activated carbon adsorption vacuum desorption condensation recovery system comprises an activated carbon tank 1, wherein an exhaust pipe of the activated carbon tank 1 is connected with a recovery pipeline through a switching valve, the alternate operation of the discharge and the activated carbon desorption regeneration is facilitated through the arrangement of the switching valve, and the recovery pipeline is sequentially provided with a cooler 2, a vacuum pump set 3, a condenser 4, a gas-liquid separator 6 and a solvent storage tank 8;

the method comprises the steps that after adsorption saturation of an active carbon tank 1, vacuum desorption is carried out by switching relevant valves, vacuum suction is carried out on the active carbon tank 1 through a vacuum pump set 3, solvent components begin to vaporize, gas containing vaporous solvent is condensed into liquid in a condenser 4, the gas which leaves the condenser 4 carries solvent droplets into a gas-liquid separator 6, the gas and the liquid are separated in the gas-liquid separator 6, the liquid solvent flows into a solvent storage tank 8, solvent recovery is completed, the cooler 2 is used for reducing the vacuum suction of the vaporous solvent, and the operation of the vacuum pump set 3 is prevented from being influenced by overhigh temperature;

as shown in fig. 2, specifically, the activated carbon canister 1 includes a canister body 1.1, an activated carbon layer 1.6 is disposed in the canister body 1.1, a first case body 1.4 and a second case body 1.7 are correspondingly disposed at two ends of the canister body 1.1, and a heat dissipation tube bundle 1.3 penetrating the canister body 1.1 and the activated carbon layer 1.6 is correspondingly communicated between the first case body 1.4 and the second case body 1.7; the inside of the second box body 1.7 is provided with a baffle plate, the baffle plate divides the inner cavity of the second box body 1.7 into a steam inlet cavity 1.71 and a waste steam collecting cavity 1.72 with equal volume, and the ports of the heat dissipation tube bundles 1.3 are symmetrically arranged by taking the baffle plate as the center and are correspondingly communicated with the steam inlet cavity 1.71 and the waste steam collecting cavity 1.72; the steam inlet cavity 1.71 is communicated with a steam inlet pipe, and the exhaust steam collecting cavity 1.72 is connected with a condensate water discharge pipe through a drain valve;

it can be understood that the steam inlet cavity 1.71, the upper half part of the heat dissipation tube bundle 1.3, the first box body 1.4, the lower half part of the heat dissipation tube bundle 1.3 and the exhaust steam collecting cavity 1.72 form a steam loop, steam circulates in the steam loop and heats the activated carbon layer 1.6, as the vacuum pump group 3 vacuumizes the activated carbon tank 1, along with the decrease of the absolute pressure in the tank, the solvent component adsorbed in the activated carbon layer 1.6 begins to vaporize, the vaporization absorbs heat to reduce the temperature of the activated carbon particles in the activated carbon layer 1.6, so that the desorption capacity of the activated carbon particles is reduced, the heat dissipation tube bundle 1.3 heats the activated carbon layer 1.6 to facilitate desorption, the purpose of introducing steam is to heat to facilitate desorption, so that the desorption of the solvent is accelerated, the activated carbon is not desorbed by high temperature, and the temperature of the steam is far lower than the temperature of high-temperature nitrogen, so that the high-temperature reaction of the solvent is not initiated;

further, the activated carbon layer 1.6 is an activated carbon particle filling layer, a supporting net 1.5 for supporting the activated carbon layer 1.6 is arranged in the tank body 1.1, a pressing cover 1.2 which is covered on the upper part of the activated carbon layer 1.6 is also arranged in the tank body 1.1, the activated carbon layer 1.6 is supported by the supporting net 1.5, the activated carbon layer 1.6 is pressed by the pressing cover 1.2, and VOCs waste gas is adsorbed by the activated carbon layer 1.6 after passing through the supporting net 1.5;

further, the condenser 4 is connected with a refrigerator 5, and the refrigerator 5 provides refrigerant for the condenser 4;

specifically, the vacuum pump set 3 is a plurality of groups of liquid ring type vacuum pumps, the plurality of groups of liquid ring type vacuum pumps are matched with a vacuum pump liquid storage tank 7, and the vacuum pump liquid storage tank 7 is connected with a solvent storage tank 8 through a pipeline; a part of the solvent gas containing steam is condensed and mixed into the vacuum pump liquid storage tank 7, and directly flows into the solvent storage tank 8 through a pipeline.

The utility model has not been described in detail in the prior art, and it is apparent to those skilled in the art that the utility model is not limited to the details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the above-described embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (5)

1. An activated carbon adsorption vacuum desorption condensation recovery system which is characterized in that: the device comprises an active carbon tank (1), wherein an exhaust pipe of the active carbon tank (1) is connected with a recovery pipeline through a switching valve, and the recovery pipeline is sequentially provided with a cooler (2), a vacuum pump set (3), a condenser (4), a gas-liquid separator (6) and a solvent storage tank (8);

the active carbon tank (1) comprises a tank body (1.1), an active carbon layer (1.6) is arranged in the tank body (1.1), a first tank body (1.4) and a second tank body (1.7) are correspondingly arranged at two ends of the tank body (1.1), and a heat dissipation tube bundle (1.3) penetrating through the tank body (1.1) and the active carbon layer (1.6) is correspondingly communicated between the first tank body (1.4) and the second tank body (1.7); the inside of box two (1.7) is equipped with the baffle, and the baffle divide into equal volume's steam air inlet chamber (1.71) and exhaust steam collection chamber (1.72) with the inner chamber of box two (1.7), and the port of heat dissipation tube bank (1.3) uses the baffle as central symmetry setting and corresponds the intercommunication with steam air inlet chamber (1.71) and exhaust steam collection chamber (1.72).

2. The activated carbon adsorption vacuum desorption condensation recovery system according to claim 1, wherein: the vacuum pump set (3) is a plurality of groups of liquid ring type vacuum pumps, the plurality of groups of liquid ring type vacuum pumps are matched with a vacuum pump liquid storage tank (7), and the vacuum pump liquid storage tank (7) is connected with a solvent storage tank (8) through a pipeline.

3. The activated carbon adsorption vacuum desorption condensation recovery system according to claim 1, wherein: the active carbon layer (1.6) is an active carbon particle filling layer, a supporting net (1.5) for supporting the active carbon layer (1.6) is arranged in the tank body (1.1), and a gland (1.2) arranged on the upper portion of the active carbon layer (1.6) in a covering mode is further arranged in the tank body (1.1).

4. The activated carbon adsorption vacuum desorption condensation recovery system according to claim 1, wherein: the steam inlet cavity (1.71) is communicated with a steam inlet pipe, and the exhaust steam collecting cavity (1.72) is connected with a condensate water discharge pipe through a drain valve.

5. The activated carbon adsorption vacuum desorption condensation recovery system according to claim 1, wherein: the condenser (4) is connected with a refrigerator (5), and the refrigerator (5) provides a refrigerant for the condenser (4).