CN110871025A - Storage tank oil gas treatment device and method based on liquid nitrogen condensation - Google Patents
Storage tank oil gas treatment device and method based on liquid nitrogen condensation Download PDFInfo
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- CN110871025A CN110871025A CN201910271136.9A CN201910271136A CN110871025A CN 110871025 A CN110871025 A CN 110871025A CN 201910271136 A CN201910271136 A CN 201910271136A CN 110871025 A CN110871025 A CN 110871025A
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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
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention relates to the technical field of oil-gas treatment, and discloses a storage tank oil-gas treatment device and method based on liquid nitrogen condensation. The oil and gas treatment device comprises: the first condensing tank (20) is internally provided with a condensing structure and is provided with an oil gas inlet (21) and an oil gas outlet (22); the second condensing tank (30) is internally provided with a second sprayer (36), the second condensing tank (30) is connected with a gas conveying pipe (31) and an exhaust pipe (32), and the gas conveying pipe is connected with the oil gas outlet; and a liquid nitrogen storage tank (40) connected with a liquid nitrogen delivery pipe (41), and the second sprayer is connected with the liquid nitrogen delivery pipe through a second delivery pipe (35). In the oil gas treatment device, oil gas sequentially passes through the first condensing tank and the second condensing tank of the oil gas treatment device to condense the oil gas for multiple times, so that the oil gas can be purified and treated, the oil gas is prevented from being dissipated without control, safety accidents can be prevented, and environment-friendly emission can be realized.
Description
Technical Field
The invention relates to the technical field of oil gas treatment, in particular to a storage tank oil gas treatment device and method based on liquid nitrogen condensation for treating oil gas in a cleaned oil gas tank.
Background
According to the regulations related to the repair of the oil storage tank, the oil storage tank needs to be developed, inspected and repaired every 5 to 7 years of operation, and at the moment, the oil storage tank needs to be cleaned. Tank cleaning is to remove sludge accumulated on the bottom of the oil tank and oil and wax condensate on the tank wall.
At present, the tank cleaning method adopted in China mainly comprises manual cleaning, and the problems of high labor intensity, long construction period, poor safety, low crude oil recovery rate, environmental pollution and the like exist in the manual tank cleaning. The mechanical cleaning method is widely used in China, and the cleaning process is a process method which utilizes a jet cleaning machine to jet a cleaning medium to the surface of a tank body to be cleaned under certain temperature, pressure and flow rate, removes surface condensate and sludge, and treats and recovers the surface condensate and the sludge. The cleaning medium is crude oil or the same kind of oil. The mechanical cleaning method has the advantages of short cleaning period, no need of people to enter the tank for operation and the like. The storage tank is required to be ventilated and dried after the storage tank is cleaned, and a large amount of mixed gas of water vapor and oil gas is discharged to the atmosphere in the process of ventilation and drying.
Therefore, in the process of cleaning the storage tank, oil gas volatilized from the storage tank 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 affected, and meanwhile, related regulations of the existing national environmental protection regulations are violated, and the storage tank is not suitable for the requirements of modern operation. In recent years, the safety production accidents of casualties caused by oil gas flash explosion occur due to uncontrolled escape of oil gas during the cleaning of storage tanks for many times in China.
Disclosure of Invention
The invention aims to provide a storage tank oil gas treatment device and an oil gas treatment method based on liquid nitrogen condensation, which can purify and treat oil gas in an oil gas tank after tank cleaning and safely discharge the oil gas.
In order to achieve the above object, an aspect of the present invention provides an oil and gas treatment device, including: the first condensing tank is internally provided with a condensing structure, and an oil gas inlet and an oil gas outlet are formed in the first condensing tank respectively; the second spray thrower is arranged in the second condensation tank, a gas pipe and an exhaust pipe are connected to the second condensation tank, and the gas pipe is connected with the oil gas outlet; and the liquid nitrogen storage tank is connected with a liquid nitrogen conveying pipe, wherein the second sprayer is connected with the liquid nitrogen conveying pipe through a second conveying pipe.
Preferably, the oil gas processing 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 oil gas inlet.
Preferably, the suction power source is a fan.
Preferably, a hollow second baffle is further disposed in the second condensation tank, one end of the second baffle is connected to one of the top surface and the bottom surface of the second condensation tank, the other end of the second baffle is spaced from the other of the top surface and the bottom surface of the second condensation tank by a predetermined distance, the second sprayer is disposed on the second baffle, and a portion of the second delivery pipe is disposed inside the second baffle.
Preferably, the second sprayer includes a plurality of second sprayers respectively disposed on opposite surfaces of the second baffle.
Preferably, the condensation structure comprises a first conveying pipe and at least one first sprayer connected with the first conveying pipe, and the first conveying pipe and the second conveying pipe are connected in parallel with the liquid nitrogen conveying pipe.
Preferably, the spraying directions of the first sprayer and the second sprayer are opposite to the flowing direction of oil and gas.
Preferably, the first sprayer and the second sprayer are spray pipes extending along the horizontal direction, and a plurality of spray nozzles are arranged on the spray pipes.
Preferably, the liquid nitrogen conveying pipe is provided with a stop valve, the first conveying pipe is provided with a first regulating valve, and the second conveying pipe is provided with a second regulating valve.
Preferably, a first temperature transmitter is arranged near the oil gas outlet in the first condensation tank, a second temperature transmitter is arranged near the exhaust pipe in the second condensation tank, and the opening degrees of the first regulating valve and the second regulating valve are respectively controlled according to PIDs arranged on the first temperature transmitter and the second temperature transmitter.
Preferably, the first temperature transmitter, the second 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 oil and gas processing device further comprises a mobile trailer, and the first condensation tank, the second condensation tank and the liquid nitrogen storage tank are arranged on the mobile trailer.
Preferably, a housing is provided on the mobile trailer, and the first condensation pipe, the second condensation tank and the liquid nitrogen storage tank are provided inside the housing.
In another aspect, the present invention provides a method for treating hydrocarbons by the hydrocarbon treatment apparatus provided by the present invention, the method comprising: the first step, introducing oil gas into a first condensing tank through an oil gas inlet; a second step of primarily condensing the oil gas in the first condensing tank through the condensation effect of a condensing structure; and a third step of enabling the oil gas which is not condensed in the first condensing tank to enter a second condensing tank, carrying out secondary condensation on the oil gas through liquid nitrogen sprayed by a second sprayer, and discharging clean gas outwards through an exhaust pipe, wherein in the third step, the temperature in the second condensing tank is controlled below 70 ℃.
Preferably, in the third step, the temperature in the second condensation tank is controlled at-90 ℃.
Preferably, in the second step, the temperature in the first condensation tank is controlled at 0 to-5 ℃.
In the oil gas treatment device provided by the invention, oil gas sequentially passes through the first condensing tank and the second condensing tank of the oil gas treatment device, the temperatures in the first condensing tank and the second condensing tank are controlled to be different, and the oil gas can be condensed for multiple times, so that the oil gas can be purified and treated, the oil gas is prevented from being dissipated without control, safety accidents can be prevented, and environment-friendly emission can be realized. 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 oil and 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 oil gas inlet
22 oil and gas outlet 23 first temperature transmitter
24 first guide shower valve 25 first delivery pipe
26 first shower 26 first baffle
30 second condensation tank 31 air delivery pipe
32 exhaust pipe 33 second temperature transmitter
34 second delivery pipe of second pilot shower valve 35
36 third spray 36 second baffle
40 liquid nitrogen storage tank 41 liquid nitrogen delivery pipe
42 stop valve 43 first regulating valve
44 second regulating valve
50 remove trailer 60 oil gas jar
Detailed Description
In the present invention, unless otherwise specified, the term "horizontal direction" used herein refers to the left-right direction in fig. 1.
Hereinafter, referring to fig. 1, the present invention will be described in detail with respect to an oil and gas treatment apparatus and an oil and gas treatment method performed by the oil and gas treatment apparatus.
As shown in fig. 1, the oil and gas treatment device provided by the present invention comprises a first condensation tank 20, a second condensation tank 30 and a liquid nitrogen storage tank 40 which are connected in sequence from left to right.
The first condensing tank 20 is internally provided with a condensing structure, the first condensing tank 20 is respectively provided with an oil gas inlet 21 and an oil gas outlet 22, the oil gas inlet 21 is connected with the air suction pipe 10, wherein the oil gas inlet 21 and the oil gas outlet 22 are preferably arranged at opposite positions, and in the invention, the oil gas inlet 21 and the oil gas outlet 22 are respectively arranged on the upper side wall of the first condensing tank 20. The oil gas enters the first condensing tank 20 through the oil gas inlet 21, under the condensing action of the condensing structure, the oil gas is condensed once, the condensed substance (waste liquid) falls at the bottom of the first condensing tank 20, and the uncondensed oil gas enters the second condensing tank 30 through the oil gas outlet 22. In the invention, substances to be condensed in oil gas can be condensed by adjusting the temperature in the first condensing tank 20, the first condensing tank 20 mainly serves to condense water vapor in the oil gas, and at the moment, the temperature in the first condensing tank 20 needs to be controlled below 0 ℃, so that the water vapor can be condensed into water when the condensing structure condenses the oil gas. The condensation source of the condensation structure can be cooling water, liquid nitrogen or any other condensed substance or condensing member, and the invention is not particularly limited.
The second spray 36 is arranged in the second condensation tank 30, and the gas pipe 31 and the gas exhaust pipe 32 are connected to the second condensation tank 30. Wherein, the gas pipe 33 is connected with the oil gas outlet 22 to receive the oil gas discharged from the first condensing tank 20, and the exhaust pipe 36 discharges the condensed clean gas to the atmosphere.
The liquid nitrogen storage tank 40, in which liquid nitrogen is stored, is connected to the second sprayer 36 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 second shower 36. The second shower 36 is connected to a liquid nitrogen transfer pipe 41 through a second transfer pipe 35, and one end of the second transfer pipe 35 is located inside the second condensation tank 30 and the other end is connected to the liquid nitrogen transfer pipe 41.
In the present invention, the organic gas in the oil gas is condensed by adjusting the temperature in the second condensation tank 30 to complete the secondary condensation of the oil gas. 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 oil gas is subjected to primary condensation through the condensation structure in the first condensation tank, and is subjected to secondary condensation through the spraying of liquid nitrogen by the sprayer in the second condensation tank, so that the disposable polluted oil gas can be purified, the clean discharged outer gas is ensured, the pollution gas is prevented from being out of control, the safety production accident is avoided, and the environment-friendly emission can be realized.
On the basis, in order to automatically suck oil gas, the oil gas treatment device further comprises an air suction pipe 10 and an air suction power source arranged on the air suction pipe 10. The suction pipe 10 is connected to a source of hydrocarbons (e.g., a cleaned hydrocarbon tank 60) for delivery of hydrocarbons. The suction power source is preferably a fan 11, but other configurations may be used, for example, a venturi tube and an air compressor may be used instead of the fan 11, as long as power can be supplied to the suction air.
One end of the air suction pipe 10 extends into the oil gas tank, and the other end is connected with an oil gas inlet 21 of the first condensation tank 20. In order to be able to take up oil and gas from the bottom, one end of the suction pipe 10 extends into the bottom surface close to the tank. Usually, can be provided with air inlet and oil gas export on the top surface of oil gas jar, breathing pipe 10 stretches into to the oil gas jar inside from the oil gas jar export, when the starting power source of breathing in, the inside oil gas of oil gas jar is by the suction, can produce the negative pressure gradually this moment, opens the oil gas jar entry, and the air is inhaled to the oil gas jar inside under the negative pressure effect, finally can be full of the air in this oil gas jar. Of course, when the oil and gas treatment device of the present invention is not in operation, the oil and gas tank inlet and outlet should be sealed, for example, by covering them, to prevent the leakage of oil and gas.
In addition, in order to extend the residence time of the oil and gas in the second condensation tank 30, it is preferable that a hollow second baffle 37 is further provided in the second condensation tank 30, one end of the second baffle 37 is connected to one of the top surface and the bottom surface of the second condensation tank 30, the other end of the second baffle 37 is spaced apart from the other of the top surface and the bottom surface of the second condensation tank 30 by a predetermined distance, the second shower 36 is provided on the second baffle 37, and a portion of the second delivery pipe 35 is provided inside the second baffle 37.
In a preferred embodiment of the present invention, the gas inlet and the gas outlet of the second condensing tank 30 are both disposed at the upper portion of the tank body, and thus the second baffle 37 is disposed such that one end is connected to the top surface of the second condensing tank 30 and the other end is spaced apart from the bottom surface of the second condensing tank 30 by a predetermined distance, so that the oil gas, after entering the second condensing tank 30, is blocked by the second baffle 37, flows downward at the left side of the second baffle 37, flows to the bottom of the second baffle 37, and then is deflected upward at the right side of the second baffle 37, and finally is discharged to the atmosphere through the exhaust pipe 32. By the second baffle plate, the flow path of the oil gas in the second condensation tank is extended, so that the contact time of the liquid nitrogen and the oil gas is lengthened, thereby improving the condensation efficiency of the second condensation tank 30.
Of course, the form of the second baffle is determined by the positions of the inlet and outlet of the second condensate tank, and any structure may be used as long as it can extend the flow path of the oil gas in the second condensate tank 30.
In addition, as another preferable mode for improving the condensing efficiency, the second sprayer 36 may include a plurality of second sprayers 36, and the plurality of second sprayers 36 are respectively disposed on the opposite surfaces of the second baffle 37, and in the present invention, it is preferable that the second sprayer 36 includes two, but the present invention is not limited thereto, and may be three, four or more. Further, the positions of the plurality of second showers 36 are selectively set according to the moving path of the oil and gas, for example, as shown in fig. 1, one of the two second showers 36 is disposed at the lower left side of the second baffle 37, the other of the two second showers 36 is disposed at the upper right side of the second baffle 37, and the two second showers 36 can sufficiently spray the oil and gas at the left and right sides of the second baffle 37. With such a structure, the oil gas can be condensed twice in the second condensing tank 30, and the condensing effect is very excellent.
As for the condensation structure of the first condensation tank 20, a heat exchanger or the like may be employed, but as a preferred embodiment of the present invention, the condensation structure may have the same or similar structure as the second condensation tank 30, that is, the condensation structure includes a first delivery pipe 25 and at least one first sprayer 26 connected to the first delivery pipe 25, and the first delivery pipe 25 and the second delivery pipe 35 are connected in parallel to the liquid nitrogen delivery pipe 41. That is, in the preferred embodiment of the present invention, the first condensing tank 20 also employs a liquid nitrogen spray method to primarily condense the oil gas.
Further preferably, the first condensation tank 20 may have the same structure as the second condensation tank 30, and may have a hollow first baffle 27 disposed therein, and at least one first sprayer 26 may be disposed on the first baffle 27, and a portion of the first delivery pipe 25 may be disposed inside the first baffle 27. However, the present invention is not limited thereto, and the first condensation tank 20 may be provided as long as the oil gas can be condensed once. In the present invention, moisture in the oil gas is mainly condensed, and therefore, it is preferable that the temperature in the first condensation tank 20 is controlled to be below 0 ℃, preferably 0 to-5 ℃.
In addition, regarding the type of the sprayer, it is preferable that, as shown in fig. 1, each of the first and second sprayers may be a horizontally extending nozzle pipe provided with a plurality of nozzles, which can secure a large spraying area, but the present invention is not limited thereto, and the first and second sprayers may be spherical nozzles, or different nozzles may be used for the first and second sprayers. Further, the spraying direction of the first sprayer 26 and the second sprayer 36 is opposite to the flowing direction of the oil gas, so that the oil gas is fully contacted with the liquid nitrogen, and the condensation effect can be improved.
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 spraying 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 25 outside the first condensation tank 20 and the second delivery pipe 35 outside the second condensation tank 30, respectively, and the liquid nitrogen spraying amounts of the first sprayer 26 and the second sprayer 36 are controlled by controlling the opening degrees of the first regulating valve 43 and the second regulating valve 44. In addition, the first and second regulating valves 43 and 44 are preferably solenoid valves to achieve automated control.
On the basis, a first temperature transmitter 23 may be disposed near the oil gas outlet 22 in the first condensation tank 20, a second temperature transmitter 33 may be disposed near the exhaust pipe 32 in the second condensation tank 30, and the opening degrees of the first and second regulating valves 43 and 44 are controlled according to PIDs set by the first and second temperature transmitters 23 and 33, thereby controlling the liquid nitrogen spraying amounts of the first and second showers 26 and 36. However, the present invention is not limited to this, and the amount of liquid nitrogen sprayed may be controlled by a regulating valve in cooperation with another structure such as a thermometer.
In addition, in order to prevent a safety accident, the first temperature transmitter 23, the second temperature transmitter 33, the shutoff valve 42, the first regulating valve 43, and the second regulating valve 44 are designed to be explosion-proof. Besides the structure, other related electrical instruments in the oil and gas treatment device can adopt an explosion-proof design.
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, the oil gas discharges the scene probably a plurality ofly, in order to can satisfy oil gas processing needs convenient and fast ground, oil gas processing apparatus can also include and remove trailer 50, and first condensate tank 20, second condensate tank 30 and liquid nitrogen storage tank 40 set up on removing trailer 50, constitute oil gas processing apparatus wholly for removing the vehicular, can the quick travel to take the processing scene, have improved whole oil gas processing apparatus's convenient to use nature. Of course, other configurations of the hydrocarbon treating 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 oil gas treatment operation. Of course, other configurations of the hydrocarbon treating device may be provided within the housing of the mobile trailer.
Based on the above, the oil-gas treatment method for treating oil gas by using the oil-gas treatment device provided by the invention is described.
The oil and gas treatment method comprises the following steps:
the first step, oil gas is introduced into a first condensing tank 20 through an oil gas inlet 21;
a second step of primarily condensing the oil gas by the condensation of the condensation structure in the first condensation tank 20;
and a third step of enabling the oil gas which is not condensed in the first condensing tank 20 to enter the second condensing tank 30, carrying out secondary condensation on the oil gas through liquid nitrogen sprayed by the second sprayer 36, and discharging the clean gas outwards through the exhaust pipe 32.
In the third step, the temperature in the second condensation tank 30 is controlled below-70 ℃ to ensure that the organic gas in the oil gas can be condensed. Preferably, the temperature in the second condensation tank 30 is controlled at-90 ℃, and most of the organic gases in the oil and 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, it is preferable that the temperature in the first condensation tank 20 is controlled to 0 to-5 ℃ in the second step, in which case moisture in the oil gas can be condensed well. Examples of the temperature control in the first condensation tank 20 include: minus 3 ℃, minus 4 ℃, minus 5 ℃ and the like.
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 oil and gas treatment device includes an air intake pipe 10, a first condensation tank 20, a second condensation tank 30, and a liquid nitrogen storage tank 40, which are connected in sequence.
The air suction pipe 10 is provided with a fan 11.
An oil gas inlet 21 and an oil gas outlet 22 are arranged on the first condensing tank 20, the oil gas inlet 21 and the oil gas outlet 22 are both arranged on the upper portion of the first condensing tank 20, the oil gas inlet 21 is connected with the air suction pipe 10, and the oil gas outlet 22 is communicated with the second condensing tank 30 through an air conveying pipe 31. A hollow first baffle plate 27 is arranged in the first condensation tank 20, a first sprayer 26 is arranged at the bottom of the left side of the first baffle plate 27, and another first sprayer 26 is arranged at the upper part of the right side of the first baffle plate 27.
The second condensate tank 30 has the same structure as the first condensate tank 20, and thus, will not be described in detail.
The first sprayer 26 of the first condensation tank 20 and the second sprayer 36 of the second condensation tank 30 are connected in parallel to a liquid nitrogen delivery pipe 41 connected to a liquid nitrogen storage tank 40 through a first delivery pipe 25 and a second delivery pipe 35, respectively.
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 first temperature transmitter 23 is provided near the hydrocarbon outlet 22 in the first condensation tank 20, and a second temperature transmitter 33 is provided near the exhaust pipe 33 in the second condensation tank 30.
The bottom of the first condensing tank 20 is connected with a first guiding and sprinkling pipe, the first guiding and sprinkling valve 24 is arranged on the first guiding and sprinkling pipe, the bottom of the second condensing tank 30 is connected with a second guiding and sprinkling pipe, and the second guiding and sprinkling valve 34 is arranged on the second guiding and sprinkling pipe.
Based on above-mentioned structure, in oil gas got into first condensate tank 20 through breathing pipe 10, oil gas was earlier from last down flowing, arrived first baffle 27 bottom after baffling and on, from up flowing down again, at this in-process, the first spray thrower 26 that sets up on first baffle 27 relative surface sprays the liquid nitrogen and carries out twice condensation to oil gas, waste liquid water conservancy diversion after the condensation drenches the pipe to first leading, the oil gas that does not condense gets into second condensate tank 30 through gas-supply pipe 31. In this process, the opening degree of the first solenoid valve 43 is controlled by the PID provided in the first temperature transmitter 23, thereby controlling the amount of liquid nitrogen sprayed from the first shower 26 so that the temperature in the first condensation tank 20 is maintained at-3 ℃.
In the second condensation tank 30, the oil gas flow path is the same as in the first condensation tank 20, and thus, a detailed description thereof is omitted. In the second condensation tank 30, the opening degree of the second solenoid valve 44 is controlled by the PID provided in the second temperature transmitter 33, and thereby the liquid nitrogen injection amount of the second shower 36 is controlled, and the temperature in the second condensation tank 30 is maintained at minus 80 ℃.
Based on the oil gas treatment device, under the operating conditions, when the oil gas concentration at the oil gas inlet 21 is 40% VOL, the oil gas concentration at the exhaust pipe 32 is 50% LEL, and the oil gas treatment efficiency is 98.5%.
Example 2
The oil and gas treatment device has the same structure as that of embodiment 1.
Only, during the condensation, the temperature in the first condensation tank 20 is maintained at minus 4 ℃, and the temperature in the second condensation tank 30 is maintained at minus 85 ℃.
Based on the oil gas treatment device, under the operating conditions, when the oil gas concentration at the oil gas inlet 21 is 40% VOL, the oil gas concentration at the exhaust pipe 32 is 42% LEL, and the oil gas treatment efficiency is 98.7%.
Example 3
The oil and gas treatment device has the same structure as that of embodiment 1.
Only, during the condensation, the temperature in the first condensation tank 20 is maintained at-5 deg.c and the temperature in the second condensation tank 30 is maintained at-90 deg.c.
Based on the oil gas treatment device, under the operating conditions, when the oil gas concentration at the oil gas inlet 21 is 40% VOL, the oil gas concentration at the exhaust pipe 32 is 33% LEL, and the oil gas treatment efficiency is 99%.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (17)
1. An oil and gas treatment device, comprising:
the oil gas condensation device comprises a first condensation tank (20), wherein a condensation structure is arranged in the first condensation tank (20), and an oil gas inlet (21) and an oil gas outlet (22) are formed in the first condensation tank (20) respectively;
the second spray thrower (36) is arranged in the second condensation tank (30), the second condensation tank (30) is connected with a gas conveying pipe (31) and a gas exhaust pipe (32), and the gas conveying pipe (31) is connected with the oil gas outlet (22); and
and the liquid nitrogen storage tank (40) is connected with a liquid nitrogen conveying pipe (41), and the second sprayer (36) is connected with the liquid nitrogen conveying pipe (41) through a second conveying pipe (35).
2. The oil and gas treatment device according to claim 1, further comprising an air intake pipe (10) and an air intake power source provided on the air intake pipe (10), and the air intake pipe (10) is connected to the oil and gas inlet (21).
3. The oil and gas treatment device according to claim 2, characterized in that said source of suction power is a fan (11).
4. The oil and gas treatment device according to claim 1, wherein a hollow second baffle plate (37) is further disposed in the second condensation tank (30), one end of the second baffle plate (37) is connected to one of the top surface or the bottom surface of the second condensation tank (30), and the other end is spaced apart from the other of the top surface or the bottom surface of the second condensation tank (30) by a predetermined distance, the second sprayer (36) is disposed on the second baffle plate (37), and a portion of the second delivery pipe (35) is disposed inside the second baffle plate (37).
5. The oil and gas treatment device according to claim 4, wherein the second sprayer (36) comprises a plurality of second sprayers (36), and the plurality of second sprayers (36) are respectively disposed on opposite surfaces of the second baffle plate (37).
6. The oil and gas treatment device according to any one of claims 1 to 5, characterized in that said condensation structure comprises a first delivery pipe (25) and at least one first sprinkler (26) connected to said first delivery pipe (25), said first delivery pipe (25) being connected in parallel to said second delivery pipe (35) to said liquid nitrogen delivery pipe (41).
7. The oil and gas treatment device according to claim 6, characterized in that the injection direction of the first and second sprayers (26, 36) is opposite to the oil and gas flow direction.
8. The oil and gas treatment device according to claim 6, wherein said first sprayer (26) and said second sprayer (36) are horizontally extending nozzles having a plurality of spray openings disposed thereon.
9. Oil and gas treatment device according to claim 6, characterized in that a shut-off valve (42) is arranged on the liquid nitrogen delivery pipe (41), a first regulating valve (43) is arranged on the first delivery pipe (25) outside the first condensation tank (20), and a second regulating valve (44) is arranged on the second delivery pipe (35) outside the second condensation tank (30).
10. The hydrocarbon processing plant according to claim 9, characterized in that a first temperature transmitter (23) is arranged in the first condensation tank (20) near the hydrocarbon outlet (22), a second temperature transmitter (33) is arranged in the second condensation tank (30) near the exhaust pipe (33),
and the opening degrees of the first regulating valve (43) and the second regulating valve (44) are respectively controlled according to the PIDs arranged on the first temperature transmitter (23) and the second temperature transmitter (33).
11. The oil and gas treatment device according to claim 10, characterized in that said first temperature transmitter (23), said second temperature transmitter (33), said shut-off valve (42), said first regulating valve (43) and said second regulating valve (44) are of explosion-proof design.
12. The oil and gas processing device according to claim 1, characterized in that the bottom of the first condensation tank (20) is connected with a first lead shower pipe, the first lead shower pipe is provided with a first lead shower valve (24), the bottom of the second condensation tank (30) is connected with a second lead shower pipe, and the second lead shower pipe is provided with a second lead shower valve (34).
13. The hydrocarbon processing device of claim 1, further comprising a mobile trailer (50), the first condensate tank (20), the second condensate tank (30) and the liquid nitrogen storage tank (40) being disposed on the mobile trailer (50).
14. The hydrocarbon processing device as claimed in claim 13, characterized in that a housing is provided on the mobile trailer (50), the first condensation duct (20), the second condensation tank (30) and the liquid nitrogen storage tank (40) being provided inside the housing.
15. A method of hydrocarbon treatment, characterized in that the method treats hydrocarbons by the hydrocarbon treatment apparatus of any one of claims 1 to 14, the method comprising:
the first step, oil gas is led into a first condensing tank (20) through an oil gas inlet (22);
a second step of primarily condensing the oil gas by a condensing action of a condensing structure in the first condensing tank (20);
the third step, the oil gas which is not condensed in the first condensing tank (20) enters a second condensing tank (30), the oil gas is secondarily condensed by liquid nitrogen sprayed by a second sprayer (36), and clean gas is discharged outwards through an exhaust pipe (32),
in the third step, the temperature in the second condensation tank (30) is controlled below-70 ℃.
16. The oil and gas treatment method according to claim 15, characterized in that in the third step the temperature in the second condensation tank (30) is controlled at-90 ℃.
17. The oil and gas treatment method according to claim 15, characterized in that in the second step, the temperature in the first condensation tank (20) is controlled at 0 to-5 ℃.
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| CN201910271136.9A Pending CN110871025A (en) | 2018-09-03 | 2019-04-04 | Storage tank oil gas treatment device and method based on liquid nitrogen condensation |
| CN201920460336.4U Active CN210206395U (en) | 2018-09-03 | 2019-04-04 | Oil gas tank oil gas processing apparatus 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 |
| CN201920458005.7U Active CN210159437U (en) | 2018-09-03 | 2019-04-04 | Storage tank oil gas processing apparatus 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 |
| 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 |
| 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 |
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| CN201920458033.9U Active CN210159438U (en) | 2018-09-03 | 2019-04-04 | Waste gas treatment device 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 |
| 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 |
| 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 |
| 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 |
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Also Published As
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| CN110871024A (en) | 2020-03-10 |
| CN210613329U (en) | 2020-05-26 |
| CN210159438U (en) | 2020-03-20 |
| CN210159437U (en) | 2020-03-20 |
| CN110871023A (en) | 2020-03-10 |
| CN210206395U (en) | 2020-03-31 |
| CN110871026A (en) | 2020-03-10 |
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