WO2014154051A1

WO2014154051A1 - Device and method for purifying volatile organic compounds

Info

Publication number: WO2014154051A1
Application number: PCT/CN2014/071376
Authority: WO
Inventors: 张智能
Original assignee: 无锡中舜成环保科技有限公司
Priority date: 2013-03-29
Filing date: 2014-01-24
Publication date: 2014-10-02
Also published as: CN103933824B; SG2014000327A; CN103933824A

Abstract

A zero-energy device for purifying volatile organic compounds comprises: an adsorption and desorption concentrator, an incinerator and a flow-mixing device; an adsorption unit of the adsorption and desorption concentrator is connected with an exhaust gas pipe and a gas purification pipe, and the gas of volatile organic compounds is introduced into the adsorption unit through the exhaust gas pipe and treated there to generate a purified gas which is then discharged into the gas purification pipe and discharged outside through a chimney. A desorption unit is connected between a concentrated gas pipe and a re-purified gas pipe. The re-purified gas incinerated in the incinerator is introduced into the flow-mixing device and then introduced into the desorption unit through the re-purified gas pipe, and the re-purified gas serves as a desorption gas source and a heat source of the desorption unit. A concentrated gas is generated through the desorption gas source of the desorption unit, the concentrated gas then flows into the inlet of the incinerator and then is incinerated to generate a re-purified gas, thus the continuous desorption cycling of the adsorption and desorption concentrator is formed; the device of the present invention can almost reach zero energy consumption by means of the heat released owing to thermal decomposition of the volatile organic compounds and the waste heat of the incinerator.

Description

Instruction manual

Volatile organic substance purification device and method

[0001] The present invention relates to a zero-energy purification device and method for volatile organic compounds, and more particularly to a mixed flow with an automatic wind pressure balance function and an automatic temperature adjustment function by using a suction and desorption concentrator and an incineration device. The device utilizes the waste heat discharged from the existing incineration device as a desorption heat source of the suction and desorption concentrator for cyclic desorption to achieve a purification treatment close to zero energy consumption.

Background technique

[0002] Taiwan Patent No. 1330105 discloses a zero-energy purification device and method for volatile organic compounds, and the main zero-energy purification device includes: an incineration device, which contains volatile organic compounds from the exhaust pipe. The purge gas is sent in, the incineration treated purge gas is discharged from the clean gas pipe; and a suction and desorption concentrator has at least one adsorption unit and a desorption unit, and the air intake pipe is forked to the net gas pipe of the incineration device, and is introduced The primary purification gas that has been incinerated by the incineration equipment but does not meet the discharge standard, and is adsorbed by the adsorption unit, and the purified gas after the adsorption treatment is discharged by the discharge pipe, and is desorbed by the desorption unit, and concentrated after desorption The gas is sent back to the incinerator by a concentrated gas pipe that is forked to the exhaust pipe. Therefore, the aforementioned patented technology incinerates the volatile organic compounds to be purified, first incinerated by incineration equipment, and then treated by suction and desorption concentrator as needed.

[0003] The inventors of the present invention have improved the above-mentioned prior art, and improved the invention to improve a zero-energy purification device and method for treating volatile organic waste gas. The compressor is processed, and then incinerated by the incineration device. In addition, with a mixed flow device with automatic air pressure balance function and automatic temperature adjustment function, the waste heat discharged from the existing incinerator is used as the desorption of the suction and desorption concentrator. The heat source is circulated and desorbed, which can save a lot of incineration fuel required for incineration equipment and achieve purification treatment close to zero energy consumption.

Summary of the invention

[0004] An object of the present invention is to provide a zero-energy purification device and method for volatile organic substances, which can be combined with an incineration device by a mixing device for automatic wind pressure balance and temperature automatic adjustment, respectively. The purification treatment of volatile organic compounds close to zero energy consumption.

[0005] In order to achieve the above object of the present invention, the present invention provides a zero-energy purification device for volatile organic compounds, comprising: a suction and desorption concentrator having at least: an adsorption unit connected to an exhaust pipe and a net gas pipe The exhaust pipe is a gas for introducing a volatile organic substance to the adsorption unit for processing to form a purge gas, wherein the purge gas is discharged into the clean gas pipe and discharged from a chimney; a desorption unit, Connecting a concentrated gas pipe and communicating with a repurifying gas pipe, wherein the repurifying gas pipe is used for introducing a repurifying gas after incineration by an incineration device, wherein the repurating gas system is used to provide a desorption unit as the desorption unit a gas source, and the desorbed gas source passing through the desorption unit flows into the inlet of the incineration device through the concentration gas pipe; the incineration device, wherein an inlet of the incineration device is connected to the concentration gas pipe, and the incineration device is An outlet is connected to the repurifying gas

[0006] Furthermore, the present invention provides a method for repurifying volatile organic compounds, comprising the steps of: providing a suction and desorption a concentrator, wherein the suction and desorption concentrator has at least: an adsorption unit connected to an exhaust pipe and a clean air pipe, wherein the exhaust pipe is used for introducing a volatile organic gas to the adsorption unit for processing a purge gas, wherein the purge gas is discharged into the clean gas pipe and discharged from a chimney; a desorption unit is connected to a concentrated gas pipe and is connected to a repurification gas pipe, wherein the repurification gas pipe is used for introduction a re-purification gas after incineration treatment, wherein the re-purification gas system is used to provide a desorption gas source as the desorption unit, and the desorption gas source passing through the desorption unit flows through the concentration gas pipe An inlet of the incineration plant; the incineration device is provided, wherein an inlet of the incineration device is connected to the concentrated gas pipe, and an outlet of the incineration device is connected to the repurification gas pipe.

[0007] The gas to be purified of the volatile organic substance is first treated by a suction and desorption concentrator, and then incinerated by an incineration device, and further, a mixed flow device having an automatic wind pressure balance function and an automatic temperature adjustment function is used. The waste heat discharged from the existing incinerator is used as the desorption heat source of the adsorption and desorption concentrator and the cyclic desorption is performed, so that the incineration fuel required for the incineration equipment can be saved in a large amount, and the purification treatment close to zero energy consumption can be achieved.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an embodiment of a zero-energy purification device for treating volatile organic waste gas according to the present invention.

2 is a block diagram of another embodiment of a zero-energy purification device for treating volatile organic waste gas of the present invention.

[0010] FIG. 3 is a flow chart of a method for reprocessing a volatile organic waste gas of the present invention.

[0011] In the figure: 10 zero energy purification device 11 suction and desorption concentrator

12 Mixing device 13 Incineration equipment 21 exhaust pipe 23 net air pipe

28b repurifying the gas pipe 28a repurifying the gas branch pipe

27 concentrated air pipe 29a air pipe

29b exhaust pipe

31, 32, 33 fans

40 chimney

50a control valve 50b regulating valve

111 adsorption unit 113 desorption unit

115 cooling unit

601, 603 steps.

detailed description

The above described objects, features and advantages of the present invention will become more apparent and understood.

1 is a block diagram showing an embodiment of a zero-energy purification device for treating volatile organic waste gas of the present invention, and an architecture of another embodiment of the zero-energy purification device for treating volatile organic waste gas of the present invention shown in FIG. Figure. The purification device 10 for treating volatile organic waste gas of the present invention mainly comprises: a suction and desorption concentrator 11 and an incineration device 13, and further comprising: a flow mixing device 12 having an automatic wind pressure balance function and an automatic temperature adjustment function, respectively .

[0014] The suction and desorption concentrator 11 has at least one adsorption unit 111 and one desorption unit 113, and the suction and desorption concentrator 11 may include a cooling unit 115. The intake end of the adsorption unit 111 is connected to the exhaust pipe 21, and the outlet end of the adsorption unit 111 is connected to the clean air pipe 23. The exhaust pipe 21 is a gas (VOCs) for introducing volatile organic substances, and the VOCs are sent to the adsorption unit 111 for adsorption treatment, and after the adsorption treatment, a purge gas is formed, and then the purge gas is discharged into the clean gas pipe 23, and then The chimney 40 is discharged from the outside.

[0015] The desorption unit 113 is connected in series between the condensing gas pipe 27 and the repurifying gas pipe 28b. The re-purified gas that has been incinerated by the incineration device 13 is introduced into the flow mixing device 12 via the repurification gas pipe 28b to perform temperature adjustment. The flow mixing device 12 is equipped with automatic wind pressure balancing and automatic temperature adjustment. The repurinating gas after passing through the mixing device 12 is for supplying a degassing gas source as the desorption unit 113, and the repurating gas flowing out of the repurifying gas pipe 28b is, for example, a temperature before flowing into the desorption unit 113. Between 180 ° C and 220 ° C, and then flowing into the desorption unit 113, then the repurification gas passing through the desorption unit 113 is formed as a concentrated gas, which flows into the concentrated gas pipe 27 and then flows into the incineration. The inlet of the apparatus 13, and then the concentrated gas is incinerated in the incineration plant 13, and then introduced into the mixing device 12 for temperature adjustment, and then the repurification gas is formed.

[0016] The flow mixing device 12 is disposed between the repurifying gas branch pipe 28a and the repurifying gas pipe 28b, and the mixing device 12 is connected in series to the repurifying gas pipe 28b.

[0017] The incineration gas after incineration treatment is incinerated by the incineration device 13, and at this time, the gas temperature of the repurification gas is at a high temperature state, and if the energy is not utilized, the energy consumption is a waste of energy consumption, in FIG. The present invention circulates the high-temperature repurifying gas of the strand Recycling, the heat energy required for the desorption process at the desorption unit 113 is supplied, and the energy consumption required for the desorption of the rotor is reduced.

[0018] A specific example of the suction and desorption concentrator 11 may be, for example, a rotary concentrator, a rotary concentrator, a fluidized bed concentrator or a fixed bed concentrator, and the adsorbent may be zeolite, silica gel or activated carbon. , carbon molecular sieve, porous resin or activated alumina.

[0019] The inlet of the incineration device 13 is connected to one end of the condensing gas pipe 27, and the outlet of the incineration device 13 is connected to one end of the mixing device 12. Specific examples of the incineration equipment 13 may be a common conventional regenerative incinerator, a common conventional regenerative catalytic incinerator, a general direct combustion incinerator, a general catalyst incinerator, or other types of common general incinerators. If a common double-tank regenerative catalyst incinerator, a multi-tank regenerative catalyst incinerator or a commonly used catalyst incinerator is used, the catalyst may be, for example, platinum (Pt), palladium (Pd), or pentoxide. A metal oxide combination such as vanadium (Vi205).

[0020] The inlet of the flow mixing device 12 is connected to the outlet of the incineration device 13, and the specific example of the mixed flow device 12 can be a common common mixing gas bucket, a common pressure control mixing gas bucket, a common cyclone gas gathering device, and a common sleeve gas mixing device. A device, or other type of common gas mixing device.

[0021] The volatile organic-containing gas is, for example, an engine exhaust gas, an organic solvent volatilized gas or a polluted air, and the volatile organic compounds in the gas may include terpenes, alkenes, aromatics, ketones, ethers. Alcohols, organic acids, amines or mixtures thereof, such as isopropanol (IPA), acetone, propylene glycol methyl ether (PGME) or propylene glycol monomethyl ether acetate, which are commonly used in the semiconductor and photovoltaic industries. (PGMEA), etc.

[0022] In FIGS. 1 and 2, the zero-energy purification device 10 of the present invention may add at least one cooling unit 115 to the suction and desorption concentrator 11. The cooling unit 115 is connected to the air inlet tube 29a With the exhaust pipe 29b. The air introducing pipe 29a is for introducing a predetermined amount of air, for example, to introduce outside air which accounts for about 5% to 60% of the total proportion of the repurifying gas. In Fig. 1, one end of the exhaust pipe 29b is forked to the condensing gas pipe 27, and the exhaust pipe 29b is used to discharge the air passing through the cooling unit 115, and then the air flows through the exhaust pipe 29b and is discharged into the concentrated air. The gas pipe 27 is finally mixed with the concentrated gas and discharged into the incineration plant 13 for incineration. In Fig. 2, one end of the exhaust pipe 29b is connected to the flow mixing device 12.

[0023] The cooling unit 115 is disposed between the adsorption unit 111 and the desorption units 113, and the cooling unit 115 can be used to isolate the adsorption units 111 from the desorption units 113, thereby solving the adsorption unit. 111 and the desorption unit 113 are contaminated with each other.

[0024] In FIGS. 1, 2, the repurifying gas branch pipe 28a is connected between the mixing device 12 and the clean gas pipe 23, and the repurifying gas branch pipe 28a is for flowing the predetermined amount of repurifying gas, for example, The repurified gas in a proportion of 5% to 60%, then, the 5% to 60% of the repurifying gas flows through the repurifying gas branch pipe 25a, flows into the net gas pipe 23, and finally is discharged from the chimney 40. The control valve 50a can be used to control the flow of the repurinating gas into the repurating gas branch pipe 28a. For example, the control valve 50a controls the flow rate to be 5% to 60% of the total volume of the repurifying gas.

[0025] In FIGS. 1, 2, the energy-saving zero-energy purification device 10 of the present invention further includes fans 31, 32, 33. The fan 31 is arranged in series in the exhaust pipe 21; the fan 32 is arranged in series in the net air pipe 23; The fan 33 is connected in series to the concentrated air pipe 27.

[0026] In particular, the fan 33 can implement a fan of variable air volume, and the variable air volume fan 33 is connected in series to the concentrating air pipe 27. When the fan 33 of Figs. 1 and 2 is a fan that implements a variable air volume, it is assumed that the concentrated rotor of the suction and desorption concentrator 11 is concentrated 15 times, and the desorbed VOCs can provide a heating value and cannot reach the set value. At the furnace temperature, the variable air volume fan 33 reduces the air volume at this time, automatically increases the concentration ratio to more than 15 times, increases the concentration ratio and reaches the set furnace temperature, and replaces the fuel supply by the heat value provided by the VOCs. Achieve near zero energy consumption. If the VOCs concentration of the source (unconcentrated exhaust gas) is increased and the furnace temperature exceeds the upper limit of the set protection value, the variable air volume fan 33 will automatically increase the air volume, so that the concentration ratio can be adjusted and the furnace can be reached. Temperature security protection mechanism.

[0027] In FIGS. 1 and 2, the energy-saving zero-energy purification device 10 of the present invention further includes a regulating valve 50b, and the inlet of the regulating valve communicates with the concentrated gas pipe between the variable air volume fan 33 and the desorption unit 113. 27, and the outlet of the regulating valve 50b

It is in communication with the exhaust pipe 21. If the concentration of the VOCs at the source (unconcentrated exhaust gas) is low, and the concentration ratio reaches the effective upper limit or the fixed concentration ratio is used, the regulating valve 50b increases the opening to increase the adsorption inlet concentration and also desorb The concentration of the outlet is gradually increased, so that the heat value supplied by the VOCs is increased to replace the supply of fuel to achieve near zero energy consumption. If the VOCs concentration at the source (unconcentrated exhaust gas) is increased and the furnace temperature exceeds the upper limit of the set protection value, the regulator valve 50b is lowered to achieve the function of furnace temperature safety protection.

[0028] FIG. 3 shows a flow chart of a method 60 of reprocessing a volatile organic waste gas of the present invention. The re-purification method 60 for treating volatile organic waste gas of the present invention comprises: a step 601 of providing a suction and desorption concentrator 11 and a step 603 of providing an incineration apparatus 13, respectively, as explained below. The desorption concentrator 11 of step 601 in the repurification method 60 and the incineration apparatus 13 of step 603 have the functions of the above zero energy consumption. The device 10 is detailed and therefore will not be described again. Further, a preferred embodiment of the repurifying method 60 of the present invention can be supported by the description of the zero energy purifying apparatus 10 of Figs.

[0029] The zero-energy purification device 10 of the present invention firstly adsorbs and treats VOCs by using a suction and desorption concentrator, and discharges the purified gas after adsorption treatment from the chimney. At the same time, the concentrated gas desorbed by the suction and desorption concentrator is incinerated by incineration equipment, and the concentrated gas is incinerated to form a repurification gas. The repurifying gas can be used as a desorption gas source for the desorption concentrator. The zero-energy purification device 10 and the re-purification method 60 of the present invention can save incineration fuel required for incineration equipment, and the present invention contributes to this effect.

[0030] The above embodiments are disclosed to illustrate the preferred embodiments of the present invention, but are not intended to limit the present invention, and those skilled in the art can make modifications and refinements without departing from the spirit and scope of the present invention. The scope of protection is subject to the scope defined by the claims.

Claims

Claim

A zero-energy purification device for volatile organic compounds, comprising: a suction and desorption concentrator having at least: an adsorption unit connected to an exhaust pipe and a clean air pipe, wherein the exhaust pipe is used for Introducing a volatile organic gas into the adsorption unit for treatment to form a purge gas, wherein the purge gas is discharged into the clean gas pipe and discharged from a chimney;

a desorption unit, connected to a concentrated gas pipe and connected to the repurifying gas pipe, wherein the repurifying gas pipe is used for introducing a repurifying gas after incineration by an incineration device, wherein the repurifying gas system is used for providing a desorption gas source of the unit, and the desorption gas source passing through the desorption unit flows into the inlet of the incineration device through the concentration gas pipe; the incineration device, wherein the inlet of the incineration device is connected to the concentration gas pipe, and An outlet of the incineration plant is coupled to the repurifying gas pipe.

2. The zero-energy purification device for volatile organic compounds according to claim 1, wherein: the absorption and desorption concentrator further comprises: a cooling unit, between the adsorption units and the Between the desorption units, and an air intake pipe and an exhaust pipe, wherein the air intake pipe is used for introducing a predetermined amount of air, and one end of the exhaust pipe is forked to the concentrated air pipe, and the row is The trachea is used to discharge the air passing through the cooling unit, and then the air is discharged into the concentrated gas pipe.

3. The zero-energy purification device for volatile organic compounds according to claim 2, further comprising: a control valve and a repurifying gas branch pipe, wherein the repurating gas branch pipe is connected to the net gas pipe and the Repurifying between the gas tubes and for introducing a predetermined amount of the repurifying gas to discharge from the chimney; wherein the control valve is connected to the repurifying gas Between the tube and the repurifying gas branch pipe, and the amount of gas used to control the introduction of the repurating gas into the repurating gas branch pipe.

4. The zero-energy purification device for volatile organic compounds according to claim 3, further comprising: a mixing device disposed between the repurating gas branch pipe and the repurifying gas pipe, and the mixing device It is connected in series to the repurifying air pipe.

5. The zero-energy purification device for volatile organic compounds according to claim 1, further comprising: a variable air volume fan connected in series to said concentrated air pipe.

6. The zero-energy purification device for volatile organic compounds according to claim 5, further comprising: a regulating valve, wherein the inlet of the regulating valve is in communication with the fan at the variable air volume and the desorption The concentrated air pipe between the units, and the outlet of the regulating valve is in communication with the exhaust pipe.

7. The zero-energy purification device for volatile organic compounds according to claim 1, wherein: the suction and desorption concentrator is a rotary concentrator, a rotary ring concentrator, a fluidized bed concentrator or One of the fixed bed concentrators.

8. The zero-energy purification device for volatile organic compounds according to claim 1, wherein: the incineration unit is a double-tank regenerative incinerator, a double-tank regenerative catalytic incinerator, Constant-burning incinerator, constant-fuel catalytic incinerator, multi-tank regenerative incinerator, multi-tank regenerative catalytic incinerator, rotary regenerative incinerator, and rotary regenerative catalyst One of the incinerators.

A method for repurifying a volatile organic compound, comprising: the steps of: providing a suction and desorption concentrator, wherein the adsorption and desorption concentrator has at least: An adsorption unit is connected to an exhaust pipe and a clean air pipe, wherein the exhaust pipe is used for introducing a volatile organic gas to the adsorption unit for processing to form a purge gas, wherein the purge gas is discharged into the net The trachea is discharged from a cigarette 3⁄4;

a desorption unit is connected to a concentrated gas pipe and is connected to the repurification gas pipe, wherein the repurification gas pipe is used for introducing a repurification gas after incineration by an incineration device, wherein the repurification gas system is used for providing a desorption gas source of the desorption unit, and the desorption gas source passing through the desorption unit flows into the inlet of the incineration device through the concentration gas pipe; the incineration device is provided, wherein an inlet of the incineration device is connected to the concentration a gas pipe, and an outlet of the incineration device is connected to the repurification gas pipe.

The method for repurifying volatile organic compounds according to claim 9, wherein: the adsorption and desorption concentrator further comprises: a cooling unit, between the adsorption units and the plurality of Between the units, an air duct and an exhaust pipe are connected, wherein the air duct is used for introducing a predetermined amount of air, and one end of the exhaust pipe is forked to the concentrated air pipe, and the exhaust pipe It is used to discharge the air passing through the cooling unit, and the air is discharged into the concentrated air pipe.

11. The method of repurifying a volatile organic compound according to claim 10, further comprising: a control valve and a repurifying gas branch pipe, wherein the repurating gas branch pipe is connected to the net gas pipe and the Between the purified gas tubes, and for introducing the predetermined amount of the repurifying gas to discharge from the chimney; wherein the control valve is connected between the repurifying gas pipe and the repurating gas branch pipe, and is used for The amount of gas introduced into the repurating gas branch pipe by the repurifying gas is controlled.

12. The method of repurifying a volatile organic compound according to claim 9, further comprising: a mixing device disposed between the repurating gas branch pipe and the repurifying gas pipe, and the mixing device Connected to the repurifying gas

13. The method of repurifying volatile organic compounds according to claim 9, further comprising: a variable air volume fan connected in series to the concentrated gas pipe.

14. The method of repurifying a volatile organic compound according to claim 13, further comprising: a regulating valve, wherein an inlet of the regulating valve is in communication with the fan and the desorption unit at a variable air volume The concentrated gas pipe is interposed, and the outlet of the regulating valve is in communication with the exhaust pipe.

15. The method for repurifying volatile organic compounds according to claim 9, wherein: the suction and desorption concentrator is a rotary concentrator, a rotary concentrator, a fluidized bed concentrator or a fixed One of the bed concentrators.

16. The method for repurifying volatile organic compounds according to claim 9, wherein: the incineration unit is a double tank type regenerative incinerator, a double tank type regenerative catalyst incinerator, and a constant combustion type. Incinerator, always-burning catalyst incinerator, a multi-tank regenerative incinerator, a multi-tank regenerative catalytic incinerator, a rotary regenerative incinerator or a rotary regenerative catalytic incinerator one of them.