CN210159438U - Waste gas treatment device based on liquid nitrogen condensation - Google Patents
Waste gas treatment device based on liquid nitrogen condensation Download PDFInfo
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- CN210159438U CN210159438U CN201920458033.9U CN201920458033U CN210159438U CN 210159438 U CN210159438 U CN 210159438U CN 201920458033 U CN201920458033 U CN 201920458033U CN 210159438 U CN210159438 U CN 210159438U
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
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Abstract
The utility model relates to a waste gas treatment technical field discloses a waste gas treatment device based on liquid nitrogen condensation. The exhaust gas treatment device includes: the first condensing tank (20) is internally provided with a condensing structure, and an exhaust gas inlet (21) and an exhaust gas outlet (22) are respectively formed on the first condensing tank (20); the second condensation tank (30) is internally provided with a sprayer, the side wall of the lower part of the second condensation tank is connected with a gas pipe (33), the top of the second condensation tank is connected with an exhaust pipe (36), and the gas pipe (33) is connected with the waste gas outlet (22); and a liquid nitrogen storage tank (40), wherein the liquid nitrogen storage tank (40) is connected with the sprayer through a liquid nitrogen delivery pipe (41). The utility model discloses a waste gas treatment device can carry out twice condensation to waste gas to the VOCs waste gas of arranging in the construction operation process that can the disposable polluted gas of purification treatment discharges prevents that the polluted gas does not have the control loss, can prevent to take place the incident, can realize the environmental protection again and discharge.
Description
Technical Field
The utility model relates to an exhaust-gas treatment technical field specifically relates to handle disposable tail gas's exhaust treatment device based on liquid nitrogen condensation.
Background
Petrochemical enterprises often generate disposable tail gas (VOCs tail gas) emission in the petroleum refining, storing and transporting processes. The technology of the oil gas recovery treatment device for generating the fixed oil gas in the fixed places is mature, and the market is gradually saturated. Such as an adsorption and absorption method oil gas recovery device applied in an oil depot, a mechanical refrigeration and adsorption method oil gas recovery device applied at a wharf and an adsorption and adsorption method catalytic oxidation device applied in a refining and chemical enterprise.
However, during the process of petroleum refining, storage and transportation, there are construction operations for one-time exhaust emission, such as cleaning of crude oil storage tanks, cleaning of storage tanks in gas stations, and purging of activated carbon hot nitrogen in adsorption devices, and such inevitable construction operations also bring about emission of pollutant gases with high concentration and large gas amount. At present, no proper process and scheme exist for the treatment of the discharge of the disposable polluted gas, so that most of the polluted gas generated by the construction operation is directly discharged into the atmosphere.
Therefore, in the construction process of one-time pollution gas emission, the discharged oil gas enters air, and fire, explosion and other disasters can be caused by static electricity and electric sparks, so that the personal safety and the body health of residents around a gas station are seriously influenced, and meanwhile, the relevant regulations of the national environmental protection regulations are violated, and the oil gas is not suitable for the requirements of modern operation. In recent years, because oil gas is not controlled to escape, the oil gas is subjected to flash explosion for many times to cause casualties.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can disposable tail gas of purification treatment and exhaust treatment device based on liquid nitrogen condensation of safe emission.
In order to achieve the above object, an aspect of the present invention provides an exhaust gas treatment device, including: the first condensing tank is internally provided with a condensing structure, and a waste gas inlet and a waste gas outlet are formed on the first condensing tank respectively; the second condensation tank is internally provided with a sprayer, the side wall of the lower part of the second condensation tank is connected with a gas pipe, the gas pipe is connected with the waste gas outlet, the top of the second condensation tank is connected with an exhaust pipe, and the exhaust pipe is made of stainless steel materials; and the liquid nitrogen storage tank is connected with the sprayer through a liquid nitrogen conveying pipe.
Preferably, the exhaust gas treatment device further comprises an air suction pipe and an air suction power source arranged on the air suction pipe, and the air suction pipe is connected with the exhaust gas inlet.
Preferably, the suction power source is a fan.
Preferably, the condensing structure is a heat exchanger, the heat exchanger includes a shell side and a tube side, the shell side inlet is connected to the exhaust gas inlet, the shell side outlet is disposed outside the first condensing tank, the tube side inlet is connected to a refrigerant source, and the tube side outlet is connected to the exhaust gas outlet.
Preferably, the tube side inlet is connected to the exhaust tube.
Preferably, the heat exchanger is a tube-fin heat exchanger.
Preferably, the sprayer is a spray pipe extending along the horizontal direction, and a plurality of spray nozzles are arranged on the spray pipe.
Preferably, the spout is disposed on a bottom surface of the spout.
Preferably, the sprayer comprises a first sprayer and a second sprayer which are sequentially arranged along the height direction, and the first sprayer and the second sprayer are respectively connected in parallel to the liquid nitrogen conveying pipe through a first conveying pipe and a second conveying pipe.
Preferably, a stop valve is provided on the liquid nitrogen delivery pipe, and a first regulating valve and a second regulating valve are respectively provided on the first delivery pipe and the second delivery pipe outside the second condensation tank.
Preferably, a temperature transmitter is disposed near the exhaust pipe in the second condensation tank, and the opening degrees of the first regulating valve and the second regulating valve are controlled according to the PID set by the temperature transmitter.
Preferably, the temperature transmitter, the stop valve, the first regulating valve and the second regulating valve adopt an explosion-proof design.
Preferably, the bottom of the first condensation tank is connected with a first lead shower pipe, the first lead shower pipe is provided with a first lead shower valve, the bottom of the second condensation tank is connected with a second lead shower pipe, and the second lead shower pipe is provided with a second lead shower valve.
Preferably, the exhaust gas treatment device includes a mobile trailer, and the first condensation tank, the second condensation tank, and the liquid nitrogen storage tank are provided on the mobile trailer.
Preferably, a housing is provided on the mobile trailer, and the first condensation tank, the second condensation tank and the liquid nitrogen storage tank are provided inside the housing.
The utility model provides an among the exhaust treatment device, waste gas passes through exhaust treatment device's first condensate tank and second condensate tank in proper order, is the difference with the temperature control in first condensate tank and the second condensate tank, can carry out twice condensation to waste gas to can purify the outer VOCs waste gas of arranging in the construction operation process that disposable polluted gas discharged, prevent that the polluted gas does not have the control loss, can prevent to take place the incident, can realize the environmental protection again and discharge. Other effects of the present invention will be described in detail below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of an exhaust gas treatment device according to a preferred embodiment of the present invention.
Description of the reference numerals
10 suction pipe 11 blower
20 first condensing tank 21 waste gas inlet
22 waste gas outlet 23 tube side outlet
24 first pilot valve 30 second condensation tank
31 first spray shower 32 second spray shower
33 gas pipe 34 second guiding and showering valve
35 temperature transmitter 36 exhaust pipe
40 liquid nitrogen storage tank 41 liquid nitrogen delivery pipe
42 stop valve 43 first regulating valve
44 second regulating valve 50 mobile trailer
Detailed Description
In the present invention, in the case where no explanation is given to the contrary, the use of the directional words such as "height direction" means the height direction of the condensation tank, which is the up-down direction in fig. 1; the "horizontal direction" is a direction perpendicular to the height direction, and is the left-right direction in fig. 1.
Next, referring to fig. 1, the present invention provides an exhaust gas treatment device.
As shown in fig. 1, the waste gas treatment device of the present invention includes a first condensation tank 20, a second condensation tank 30 and a liquid nitrogen storage tank 40 connected in sequence from left to right.
The second condensing tank 30 is provided with a sprayer inside, the lower side wall is connected with a gas pipe 33, and the top is connected with an exhaust pipe 36. Wherein, the gas pipe 33 is connected with the waste gas outlet 22 to receive the waste gas discharged from the first condensing tank 20, the exhaust pipe 36 discharges the condensed clean gas to the atmosphere or other structures, and the exhaust pipe 36 preferably adopts a stainless steel pipe to improve the service life.
The liquid nitrogen storage tank 40 stores liquid nitrogen therein, and is connected to a shower through a liquid nitrogen delivery pipe 41 to supply the liquid nitrogen to the second condensation tank 30. One end of the liquid nitrogen delivery pipe 41 extends into the liquid nitrogen storage tank 40, preferably to the bottom, and the other end is connected to the shower.
The utility model discloses in, through adjusting the temperature in the second condensate tank 30, can condense the material of required condensation in the waste gas, for example, when waste gas is oil gas, in second condensate tank 30, spray liquid nitrogen, the organic gas in the main condensation oil gas through the paint sprayer. In order to condense the organic gases in the oil gas, the temperature in the second condensation tank 30 needs to be controlled below 70 ℃, preferably 90 ℃ below zero, and in the case of 90 ℃ below zero, most of the organic gases in the oil gas are condensed and fall to the bottom of the second condensation tank 30, so that the condensation effect is excellent.
Therefore, the utility model discloses a condensation structure in the first condensate tank carries out primary condensation to waste gas, sprays the liquid nitrogen through the spray thrower in the second condensate tank and comes to carry out secondary condensation to waste gas, through this kind of doublestage condensation structure, can purification treatment disposable pollution waste gas, guarantees that exhaust outer gas is clean, prevents that the polluted gas does not have the control loss, avoids taking place the safety in production accident, and can realize the environmental protection and discharge.
On this basis, for the automatic waste gas of inhaling, the utility model discloses an exhaust treatment device still includes breathing pipe 10 and the power supply of breathing in of setting on breathing pipe 10. The suction pipe 10 is connected to an exhaust gas source (e.g., a cleaned oil gas tank) to deliver exhaust gas. The suction power source is preferably a fan 11, but other structures may be adopted, for example, a venturi tube and an air compressor may be adopted instead of the fan 11, as long as exhaust gas can be sucked. For convenience of explanation, the oil and gas tank will be described as an exhaust gas source.
One end of the air suction pipe 10 extends into the interior of the oil gas tank, and the other end is connected with an exhaust gas inlet 21 of the first condensation tank 20. In order to be able to absorb the exhaust gas from the bottom, one end of the suction pipe 10 extends into the bottom surface near the oil gas tank. Usually, can be provided with oil gas tank entry and oil gas tank export on oil gas tank's the top surface, breathing pipe 10 stretches into to oil gas tank inside from the oil gas tank export, when the starting power source of breathing in, the inside waste gas of oil gas tank is by the suction, can produce the negative pressure gradually this moment, opens the oil gas tank entry, and the air is inhaled to oil gas tank inside under the negative pressure effect, finally can be full of the air in this oil gas tank. Of course, when the waste gas treatment device of the utility model is not in operation, the oil gas tank inlet and the oil gas tank outlet should be closed, for example, covered by a cover, so as to prevent the internal waste gas from leaking.
In addition, the condensation structure of the first condensation tank 20 may be any structure as long as it can condense the water vapor in the exhaust gas, as a preferred embodiment, as shown in fig. 1, the present invention adopts a structure of a heat exchanger to achieve the above functions. Specifically, the condensing structure is a heat exchanger including a shell side and a tube side, the shell side inlet is connected to the exhaust gas inlet 21, the shell side outlet is connected to the exhaust gas outlet 22, the tube side inlet is connected to the refrigerant source, and the tube side outlet 23 is disposed outside the first condensing tank 20.
Refrigerant flows through the tube side part, so that the waste gas enters the shell side from the waste gas inlet 21, part of substances (such as water vapor) in the waste gas is condensed after the heat exchange with the refrigerant in the tube side, and the uncondensed waste gas enters the second condensing tank 30 through the gas conveying pipe 33 connected with the waste gas outlet 22 to be subjected to secondary condensation.
As a preferred embodiment, in the utility model discloses in, the tube side entry is connected with blast pipe 36 for after the liquid nitrogen evaporation that participates in after the secondary condensation in second condensing tank 30 is gaseous, because of its self temperature is lower, get into the tube side of the cold exchanger through blast pipe 36, in order can carry out the heat exchange with the waste gas in the shell side, participate in the primary condensation process of waste gas, therefore, the clean gas (cooling gas) of accomplishing the secondary condensation of waste gas can be used as the refrigerant source of cold exchanger, under this kind of structure, can improve energy utilization. The present invention is not limited thereto and the source of the refrigerant may be cooling water, liquid nitrogen or any other condensed substance.
In addition, in order to make the flow path of the cooling gas longer in the tube side, the tube side may be a spiral tube or a serpentine tube, or the heat exchanger is preferably a fin-and-tube type heat exchanger, whereby the cooling gas in the tube side is sufficiently heat-exchanged with the off-gas in the shell side to improve the condensing efficiency of the first condensing tank 20. However, the utility model does not have special restrictions to the concrete form of the intercooler.
When condensing waste gas with the cold exchanger structure, the operating condition of the cold exchanger is: the temperature of the tube pass inlet is minus 60 to minus 80 ℃, the temperature of the tube pass outlet is minus 30 to minus 40 ℃, and the pressure is 2 kpa; the inlet temperature of the shell layer is normal temperature, the outlet temperature of the shell layer is minus 25 ℃ to minus 35 ℃, and the pressure is 3 kp. Under these conditions, the effect of treating exhaust gas is excellent.
In addition, regarding the type of the sprayer, it is preferable that the sprayer is a spray pipe extending in a horizontal direction and provided with a plurality of spray ports as shown in fig. 1, and such a structure can secure a large spray area, but the present invention is not limited thereto. Further, because waste gas is from the bottom up flow, preferably, the spout sets up on the bottom surface of spray tube, and waste gas flow direction and liquid nitrogen spray opposite direction can make waste gas and liquid nitrogen fully contact, can improve the condensation effect.
In addition, in the present invention, as shown in fig. 1, preferably, the sprayer may include a first sprayer 31 and a second sprayer 32 arranged in sequence in the height direction, and the first sprayer 31 and the second sprayer 32 are connected in parallel to the liquid nitrogen delivery pipe 41 through a first delivery pipe and a second delivery pipe, respectively. After waste gas got into second condensing tank 30, from up flowing down, set up two sprayers in the direction of height, can make the liquid nitrogen volume of spouting increase, nevertheless the utility model discloses be not limited to this, the sprayer can be including more, or only set up one, specifically decides the quantity of sprayer according to the organic gas content in the waste gas.
Further, the liquid nitrogen delivery pipe 41 is provided with a shutoff valve 42, and whether or not liquid nitrogen is delivered is performed by opening and closing the shutoff valve 42. On this basis, in order to control the liquid nitrogen injection amount of each sprayer separately, it is preferable that a first regulating valve 43 and a second regulating valve 44 are provided on the first delivery pipe and the second delivery pipe outside the second condensation tank 30, respectively, and the first regulating valve 43 and the second regulating valve 44 are preferably solenoid valves to realize automated control.
In addition, a temperature transmitter 35 may be provided near the exhaust pipe 36 in the second condensation tank 30, and the opening degrees of the first and second regulating valves 43 and 44 are controlled according to the PID provided by the temperature transmitter 35, thereby controlling the liquid nitrogen spraying amounts of the first and second showers 31 and 32. However, the utility model is not limited to this, can also cooperate with the governing valve through other structures such as thermometer to control the liquid nitrogen volume of spouting.
In addition, in order to prevent a safety accident, the temperature transmitter 35, the shutoff valve 42, the first regulating valve 43, and the second regulating valve 44 are designed to be explosion-proof. Besides the above structure, the explosion-proof design can be adopted for other related electrical instruments in the waste gas treatment device.
In addition, since the condensed waste liquid in the first and second condensing tanks 20 and 30 drops to the bottom of the tank body, in order to discharge the waste liquid regularly, preferably, the bottom of the first condensing tank 20 is connected with a first shower guide pipe, which is provided with a first shower guide valve 24, the bottom of the second condensing tank 30 is connected with a second shower guide pipe, which is provided with a second shower guide valve 34, the first shower guide pipe and the second shower guide pipe can be connected to a waste liquid collecting box, etc., and can be transported to a waste liquid treatment plant uniformly after being filled, thereby avoiding secondary pollution.
In operating mode, VOCs exhaust emission scene may be a plurality of, in order to can satisfy the VOCs exhaust-gas treatment needs among the construction operation process that disposable polluted gas discharged convenient and fast, exhaust treatment device can also include removal trailer 50, first condensate tank 20, second condensate tank 30 and liquid nitrogen storage tank 40 set up on removing trailer 50, constitute exhaust treatment device whole for removing the vehicular, can remove to the area fast and handle the scene, whole exhaust treatment device's convenient usability has been improved. Of course, other configurations of the exhaust treatment device may be provided on the mobile trailer.
In addition, a housing may be provided on the mobile trailer 50, and the first and second condensation tanks 20 and 30 and the liquid nitrogen storage tank 40 are provided inside the housing. The shell carries out thermal-insulated heat preservation to the structure of shell inside and handles, fully ensures the safety of exhaust-gas treatment operation. Of course, other configurations of the exhaust treatment device may be provided within the housing of the mobile trailer.
The above is the utility model provides an exhaust treatment device, based on this, continue the explanation and utilize the utility model provides an exhaust treatment device handles the exhaust treatment method of waste gas.
The utility model discloses an exhaust-gas treatment method includes following step:
a first step of introducing the off-gas into a first condensing tank 20 through an off-gas inlet 21;
a second step of primarily condensing the exhaust gas by condensation of the condensing structure in the first condensing tank 20;
and a third step of allowing the uncondensed waste gas in the first condensation tank 20 to enter the second condensation tank 30, performing secondary condensation on the waste gas through liquid nitrogen sprayed by a sprayer, and discharging the clean gas outwards through an exhaust pipe 36.
In the third step, the temperature in the second condensation tank 30 is controlled below-70 ℃ to ensure that the organic gases in the exhaust gas can be condensed. Preferably, the temperature in the second condensation tank 30 is controlled at-90 ℃, at which time most of the organic gases in the exhaust gas can be condensed.
Specific examples of the temperature control in the second condensation tank 30 include: minus 70 ℃, minus 72 ℃, minus 75 ℃, minus 78 ℃, minus 80 ℃, minus 82 ℃, minus 85 ℃, minus 88 ℃ and minus 90 ℃ and the like.
In addition, when the condensing structure adopts a heat exchanger structure and the tube side inlet of the heat exchanger is connected with the exhaust pipe 36, the operating conditions of the heat exchanger are as follows: the tube-side inlet temperature is preferably 60 ℃ below zero to 80 ℃ below zero, the tube-side outlet temperature is preferably 30 ℃ below zero to 40 ℃ below zero, the pressure is 2kpa, the shell-side inlet temperature is preferably normal temperature, the shell-side outlet temperature is 25 ℃ below zero to 35 ℃ below zero, and the pressure is 3 kp.
The present invention will be further described with reference to the following examples, but the present invention is not limited to the following examples.
Example 1
As shown in fig. 1, the exhaust gas treatment device includes an air intake pipe 10, a blower 11, a first condensing tank 20, a second condensing tank 30, and a liquid nitrogen storage tank 40, which are connected in sequence.
Wherein, the first condensing tank 20 is provided with an exhaust gas inlet 21 and an exhaust gas outlet 22, the exhaust gas inlet 21 and the exhaust gas outlet 22 are both arranged at the lower part of the first condensing tank 20, the exhaust gas inlet 21 is connected with the air suction pipe 10, and the exhaust gas outlet 22 is communicated with the inside of the second condensing tank 30 through an air conveying pipe 33 connected at the lower part of the second condensing tank 30. The first condensing tank 20 comprises a condensing structure inside, the condensing structure is a heat exchanger, a shell side inlet of the heat exchanger is connected with the waste gas inlet 21, a shell side outlet is connected with the waste gas outlet 22, a tube side inlet is connected with the exhaust pipe 36, and a tube side outlet 23 is arranged outside the first condensing tank 20. In addition, a first lead shower pipe is arranged at the bottom of the first condensation tank 20.
The second condensing tank 30 is provided with a first sprayer 31 and a second sprayer 32 which are sequentially arranged along the height direction, the first sprayer 31 and the second sprayer 32 are respectively connected in parallel to the liquid nitrogen conveying pipe 41 through a first conveying pipe and a second conveying pipe, one end of the liquid nitrogen conveying pipe 41 extends into the bottom of the liquid nitrogen storage tank 40, and the other end of the liquid nitrogen conveying pipe is connected with the first sprayer 31 and the second sprayer 32.
The liquid nitrogen delivery pipe 41 is provided with a stop valve 42, and the first delivery pipe and the second delivery pipe are respectively provided with a first regulating valve 43 and a second regulating valve 44.
A temperature transmitter 35 is provided near the exhaust pipe 36 of the second condensation tank 30. In addition, a second lead shower pipe is arranged at the bottom of the second condensation tank 30.
Based on above-mentioned structure, waste gas passes through breathing pipe 10 and gets into the shell side of heat exchanger in, with the refrigerant heat transfer in the tube side to oil gas carries out condensation once in the shell side of heat exchanger, and the waste liquid water conservancy diversion after the condensation drenches the pipe to first leading, and the waste gas that does not condense gets into second condensate tank 30 through gas-supply pipe 33. In second condensate tank 30, waste gas is from down up flowing, and first sprayer 31 and second sprayer 32 spray the liquid nitrogen this moment to carry out the secondary condensation to waste gas, the waste liquid water conservancy diversion after the condensation is to the second lead drenches the pipe in, clean gas (low temperature gas) get into the tube side of the cold exchanger through blast pipe 36 in and with the shell side in waste gas carry out the heat transfer, participate in the primary condensation of the waste gas of new entering, later discharge to the atmosphere through tube side export 23.
In addition, in the first condensation tank 20, the operation conditions of the recuperator are: the temperature of the tube pass inlet is 60 ℃ below zero, the temperature of the tube pass outlet is 30 ℃ below zero, and the pressure is 2 kpa; the inlet temperature of the shell side is normal temperature, the outlet temperature of the shell side is 25 ℃ below zero, and the pressure is 3 kp. In the second condensation tank 30, the opening degrees of the first solenoid valve 43 and the second solenoid valve 44 are controlled by the PID provided in the temperature transmitter 35, thereby controlling the liquid nitrogen injection amount of the first shower 31 and the second shower 32 and maintaining the temperature in the second condensation tank 30 at minus 90 ℃.
Based on the above exhaust gas treatment device, and under the above operating conditions, when the concentration of VOCs in the exhaust gas at the exhaust gas inlet 21 is 35% VOL, the concentration of VOCs in the exhaust gas at the tube side outlet is 50% LEL, and the exhaust gas treatment efficiency is 98.3%.
Example 2
The exhaust gas treatment device has the same structure as in example 1.
In addition, in the first condensation tank 20, the operation conditions of the recuperator are: the temperature of the tube pass inlet is 70 ℃ below zero, the temperature of the tube pass outlet is 35 ℃ below zero, and the pressure is 2 kpa; the inlet temperature of the shell side is normal temperature, the outlet temperature of the shell side is 35 ℃ below zero, and the pressure is 3 kp. In the second condensation tank 30, the temperature inside the second condensation tank 30 is maintained at minus 90 ℃.
Based on the exhaust gas treatment device of the preferred embodiment, and under the above operating conditions, when the exhaust gas concentration of VOCs at the exhaust gas inlet 21 is 34% VOL, the exhaust gas concentration of VOCs at the tube side outlet is 50% LEL, and the exhaust gas treatment efficiency is 98.93%.
Example 3
The exhaust gas treatment device has the same structure as in example 1.
In addition, in the first condensation tank 20, the operation conditions of the recuperator are: the temperature of the tube pass inlet is 80 ℃ below zero, the temperature of the tube pass outlet is 40 ℃ below zero, and the pressure is 2 kpa; the inlet temperature of the shell side is normal temperature, the outlet temperature of the shell side is 35 ℃ below zero, and the pressure is 3 kp. In the second condensation tank 30, the temperature inside the second condensation tank 30 is maintained at minus 90 ℃.
Based on the above exhaust gas treatment device, and under the above operating conditions, when the exhaust gas concentration of VOCs at the exhaust gas inlet 21 is 35% VOL, the exhaust gas concentration of VOCs at the tube side outlet is 25% LEL, and the exhaust gas treatment efficiency is 99.14%.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, makes up with any suitable mode including each concrete technical feature. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (15)
1. An exhaust gas treatment device, characterized in that the exhaust gas treatment device comprises:
the device comprises a first condensing tank (20), wherein a condensing structure is arranged in the first condensing tank (20), and an exhaust gas inlet (21) and an exhaust gas outlet (22) are respectively formed on the first condensing tank (20);
the second condensation tank (30) is internally provided with a sprayer, the side wall of the lower part of the second condensation tank is connected with a gas pipe (33), the gas pipe (33) is connected with the waste gas outlet (22), the top of the second condensation tank is connected with an exhaust pipe (36), and the exhaust pipe (36) is made of stainless steel materials; and
and the liquid nitrogen storage tank (40), and the liquid nitrogen storage tank (40) is connected with the sprayer through a liquid nitrogen delivery pipe (41).
2. The exhaust gas treatment device according to claim 1, further comprising an air suction pipe (10) and an air suction power source provided on the air suction pipe (10), and the air suction pipe (10) is connected to the exhaust gas inlet (21).
3. An exhaust gas treatment device according to claim 2, characterized in that the suction power source is a fan (11).
4. An exhaust gas treatment device according to claim 1, wherein the condensation structure is a heat exchanger comprising a shell side and a tube side, a shell side inlet being connected to the exhaust gas inlet (21), a shell side outlet being connected to the exhaust gas outlet (22), a tube side inlet being connected to a refrigerant source, and a tube side outlet (23) being arranged outside the first condensation tank (20).
5. The exhaust gas treatment device of claim 4, wherein the tube-side inlet is connected to the exhaust pipe (36).
6. The exhaust gas treatment device of claim 4 or 5, wherein the recuperator is a tube-fin recuperator.
7. The exhaust gas treatment device of claim 1, wherein the sprayer is a horizontally extending nozzle having a plurality of spray openings disposed therein.
8. The exhaust treatment device of claim 7, wherein the nozzle is disposed on a bottom surface of the nozzle.
9. The exhaust gas treatment device according to claim 1, wherein the shower includes a first shower (31) and a second shower (32) arranged in this order in a height direction, and the first shower (31) and the second shower (32) are connected in parallel to the liquid nitrogen delivery pipe (41) through a first delivery pipe and a second delivery pipe, respectively.
10. Exhaust gas treatment device according to claim 9, characterized in that a shut-off valve (42) is arranged on the liquid nitrogen delivery pipe (41), and a first and a second regulating valve (43, 44) are arranged on the first and second delivery pipe outside the second condensation tank (30), respectively.
11. The exhaust gas treatment apparatus according to claim 10, wherein a temperature transmitter (35) is provided in the second condensation tank (30) near the exhaust pipe (36), and the opening degrees of the first and second regulating valves (43, 44) are controlled according to a PID provided by the temperature transmitter (35).
12. Exhaust gas treatment device according to claim 11, characterized in that the temperature transmitter (35), the shut-off valve (42), the first regulating valve (43) and the second regulating valve (44) are of explosion-proof design.
13. The exhaust gas treatment device according to claim 1, wherein a first pilot shower pipe is connected to a bottom of the first condensation tank (20), and a first pilot shower valve (24) is provided on the first pilot shower pipe, and a second pilot shower pipe is connected to a bottom of the second condensation tank (30), and a second pilot shower valve (34) is provided on the second pilot shower pipe.
14. The exhaust gas treatment device of claim 1, further comprising a mobile trailer (50), wherein the first condensation tank (20), the second condensation tank (30), and the liquid nitrogen storage tank (40) are disposed on the mobile trailer (50).
15. The exhaust gas treatment device of claim 14, wherein an outer housing is provided on the mobile trailer (50), and the first condensation tank (20), the second condensation tank (30) and the liquid nitrogen storage tank (40) are provided inside the outer housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018110195517 | 2018-09-03 | ||
| CN201811019551 | 2018-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210159438U true CN210159438U (en) | 2020-03-20 |
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Family Applications (8)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920460336.4U Active CN210206395U (en) | 2018-09-03 | 2019-04-04 | Oil gas tank oil gas processing apparatus based on liquid nitrogen condensation |
| CN201920460337.9U Active CN210613329U (en) | 2018-09-03 | 2019-04-04 | Oil gas treatment device based on liquid nitrogen condensation |
| CN201910271129.9A Pending CN110871024A (en) | 2018-09-03 | 2019-04-04 | Oil gas tank oil gas treatment device and oil gas treatment method based on liquid nitrogen condensation |
| CN201920458005.7U Active CN210159437U (en) | 2018-09-03 | 2019-04-04 | Storage tank oil gas processing apparatus based on liquid nitrogen condensation |
| CN201910271124.6A Pending CN110871023A (en) | 2018-09-03 | 2019-04-04 | Oil gas treatment device and oil gas treatment method based on liquid nitrogen condensation |
| CN201910271136.9A Pending CN110871025A (en) | 2018-09-03 | 2019-04-04 | Storage tank oil gas treatment device and method based on liquid nitrogen condensation |
| CN201910271702.6A Pending CN110871026A (en) | 2018-09-03 | 2019-04-04 | Waste gas treatment device and waste gas treatment method based on liquid nitrogen condensation |
| CN201920458033.9U Active CN210159438U (en) | 2018-09-03 | 2019-04-04 | Waste gas treatment device based on liquid nitrogen condensation |
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| CN201920460336.4U Active CN210206395U (en) | 2018-09-03 | 2019-04-04 | Oil gas tank oil gas processing apparatus based on liquid nitrogen condensation |
| CN201920460337.9U Active CN210613329U (en) | 2018-09-03 | 2019-04-04 | Oil gas treatment device based on liquid nitrogen condensation |
| CN201910271129.9A Pending CN110871024A (en) | 2018-09-03 | 2019-04-04 | Oil gas tank oil gas treatment device and oil gas treatment method based on liquid nitrogen condensation |
| CN201920458005.7U Active CN210159437U (en) | 2018-09-03 | 2019-04-04 | Storage tank oil gas processing apparatus based on liquid nitrogen condensation |
| CN201910271124.6A Pending CN110871023A (en) | 2018-09-03 | 2019-04-04 | Oil gas treatment device and oil gas treatment method based on liquid nitrogen condensation |
| CN201910271136.9A Pending CN110871025A (en) | 2018-09-03 | 2019-04-04 | Storage tank oil gas treatment device and method based on liquid nitrogen condensation |
| CN201910271702.6A Pending CN110871026A (en) | 2018-09-03 | 2019-04-04 | Waste gas treatment device and waste gas treatment method based on liquid nitrogen condensation |
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| CN111420519B (en) * | 2020-04-09 | 2022-03-25 | 中化泉州石化有限公司 | System and method for treating oil gas |
| CN113730940A (en) * | 2020-05-28 | 2021-12-03 | 中国石油化工股份有限公司 | Device and method for emergency recovery of leaked gas |
| CN113318559A (en) * | 2021-06-30 | 2021-08-31 | 广州华青节能环保科技有限公司 | Liquid nitrogen direct contact type VOC cryogenic treatment equipment |
| CN115962595A (en) * | 2023-03-16 | 2023-04-14 | 河南工学院 | Refrigerator car based on liquid nitrogen refrigeration and liquid nitrogen refrigeration system |
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| FR2509387A1 (en) * | 1981-07-07 | 1983-01-14 | Quiri Usines | Oil cooler for screw compressor - has oil gas separator with refrigerant surface spray to cool before return to reservoir |
| US7498009B2 (en) * | 2004-08-16 | 2009-03-03 | Dana Uv, Inc. | Controlled spectrum ultraviolet radiation pollution control process |
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| US20130247939A1 (en) * | 2012-03-26 | 2013-09-26 | Turnkey Cleaning Services, Llc | Method for automated, closed loop cleaning of tanks |
| ES2432417B1 (en) * | 2012-04-30 | 2014-09-10 | Albemarna, S.L. | EQUIPMENT FOR VOCATIONAL CAPTURE APPLICABLE TO HYDROCARBON STORAGE TANKS AND CAPTURE PROCESS. |
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2019
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| CN210613329U (en) | 2020-05-26 |
| CN110871026A (en) | 2020-03-10 |
| CN210206395U (en) | 2020-03-31 |
| CN110871024A (en) | 2020-03-10 |
| CN110871025A (en) | 2020-03-10 |
| CN210159437U (en) | 2020-03-20 |
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