CN108679268B - Tail pipe air locking device and method of extractant purifying and recycling system - Google Patents
Tail pipe air locking device and method of extractant purifying and recycling system Download PDFInfo
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- CN108679268B CN108679268B CN201810746026.9A CN201810746026A CN108679268B CN 108679268 B CN108679268 B CN 108679268B CN 201810746026 A CN201810746026 A CN 201810746026A CN 108679268 B CN108679268 B CN 108679268B
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- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 147
- 238000000746 purification Methods 0.000 claims description 39
- 238000011084 recovery Methods 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 27
- 239000001301 oxygen Substances 0.000 claims description 27
- 229910052760 oxygen Inorganic materials 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 20
- 238000000605 extraction Methods 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 230000001502 supplementing effect Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000012736 aqueous medium Substances 0.000 claims 1
- 238000004821 distillation Methods 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
- F16K13/08—Arrangements for cutting-off not used
- F16K13/10—Arrangements for cutting-off not used by means of liquid or granular medium
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physical Water Treatments (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The invention relates to a tail pipe air locking device and a tail pipe air locking method of an extractant purifying and recycling system, which belong to tail gas safety protection equipment for distillation treatment of oil-containing drilling cuttings in the field of drilling engineering.
Description
Technical Field
The invention belongs to the field of drilling engineering, and particularly relates to a tail pipe gas locking device and method of an extractant purifying and recycling system.
Background
The solvent extraction technology is adopted to extract oil-containing drill cuttings or oil-containing materials, and then the extractant and the oil are distilled, separated and recovered through high-temperature distillation, but because the extractant commonly used belongs to inflammable and explosive products, in order to reduce the potential safety hazard of an operation site, a gas locking device is often arranged at a tail gas pipe of a distillation recovery system, so that oxygen in the air is prevented from entering the distillation recovery system.
The traditional tail pipe air locking device is provided with the variable frequency fan at the tail pipe, the device prevents air from entering the recovery system by generating negative pressure, has high requirements on the tightness of the fan, simultaneously is easy to extract uncondensed combustible tail gas, has higher operation risk and has poor isolation effect.
The other mode is to directly insert the tail pipe into the water tank, and the liquid level exceeds the outlet of the tail pipe, so that the defect is that when the recovery system cools, the tail pipe is required to be provided with enough vertical height, and the installation height is higher, so that certain potential safety hazard exists.
Disclosure of Invention
The invention provides a tail pipe air locking device and a tail pipe air locking method of an extracting agent purifying and recycling system, and aims to solve the defects in the prior art; the second purpose is to overcome the problems of insufficient tightness, high operation risk or potential safety hazard existing in the existing equipment for treating oxygen back suction in the air.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A tail pipe lock gas device of an extractant purification recovery system, comprising: the water tank is divided into a left cavity and a right cavity by a partition plate fixed at the top of the inner cavity of the water tank, the bottoms of the two cavities are communicated to form a communicating vessel, the tops of the left cavity and the right cavity are respectively provided with a branch pipe communicated with an inlet pipe, an oxygen detector is arranged in the inlet pipe, the top of the right cavity is provided with an outlet pipe, and a branch pipe connected with the inlet pipe at the top of the right cavity is also provided with a short-circuit valve; the top of the right cavity is provided with a water supplementing valve, one side of the right cavity is also connected with a water level limiting valve, and the level of the water level limiting valve is higher than that of the communicating part of the bottoms of the two cavities.
A self-sealing overflow bent pipe is arranged above the water level limiting valve of the right cavity; the volume of the cavity formed by the side wall of the right cavity between the horizontal height of the self-sealing overflow bent pipe and the horizontal height of the water level limiting valve in the right cavity is equal to the volume of the cavity formed by the side wall of the right cavity between the horizontal height of the water level limiting valve in the right cavity and the horizontal height of the communicating position of the bottoms of the two cavities.
The volume of the cavity in the left cavity above the horizontal height of the water level limiting valve is more than twice, and the volume of the cavity formed between the horizontal height of the water level limiting valve in the right cavity and the horizontal height of the communicating position of the bottoms of the two cavities and the side wall of the right cavity is more than twice.
In the left cavity, the cavity volume formed by the water level limiting valve and the side wall of the left cavity is equal to that of the right cavity between the water level limiting valve and the communicating position of the bottom of the two cavities.
The oxygen sensor is characterized by further comprising a main control circuit board and a power supply, wherein the short-circuit valve is an electric control valve, and the main control circuit board is electrically connected with the power supply, the oxygen detector and the short-circuit valve.
Still include the level gauge, water tank lateral wall department is provided with the level gauge.
The liquid level gauge is characterized in that two communicating vessel type liquid level gauges are respectively arranged in the left cavity and the right cavity.
The bottom of the water tank is provided with a water outlet, and a waterproof plug is arranged on the water outlet.
The water tank further comprises supporting legs, and at least three supporting legs are arranged at the bottom of the water tank.
The branch pipes are metal hoses.
The outlet pipe is an L-shaped bent pipe, and a downward groove is formed at the outlet of the outlet pipe.
The device has the beneficial effects that the device adopts the water medium for flexible isolation, when the evaporation speed of the extraction agent purification and recovery system is smaller than the condensation speed, the inlet cavity body can generate negative pressure, water in the outlet cavity body can partially enter the inlet cavity body to compensate the volume difference, the pressure of the two end cavity bodies is balanced by the water to isolate air, and the safety accidents caused by the fact that oxygen in the air is sucked into the extraction agent purification and recovery system from the tail pipe are prevented.
Drawings
FIG. 1 is a schematic view of a static structure of the present invention;
FIG. 2 is a schematic diagram of the positive pressure venting state of the present invention;
FIG. 3 is a schematic diagram of the negative pressure air lock state of the present invention;
FIG. 4 is a schematic view showing a state in which the water volatilization level drops;
Marked in the figure as: 1. a water tank; 2. an inlet pipe; 3. an oxygen detector; 4. a short-circuit valve; 5. a metal hose; 6. an outlet tube; 7. a water supplementing valve; 8. a liquid level gauge; 9. self-sealing overflow bent pipe; 10. a water level limiting valve; 11. a partition plate; 12. a water drain plug; 13. and (5) supporting legs.
Detailed Description
Example 1
A tail pipe lock gas device of an extractant purification recovery system, comprising: the water tank 1 is divided into a left cavity and a right cavity by a partition plate 11 fixed at the top of the inner cavity of the water tank 1, the bottoms of the two cavities are communicated to form a communicating vessel, the tops of the left cavity and the right cavity are respectively provided with a branch pipe communicated with an inlet pipe 2, an oxygen detector 3 is arranged in the inlet pipe 2, an outlet pipe 6 is arranged at the top of the right cavity, and a short-circuit valve 4 is further arranged on the branch pipe of which the top of the right cavity is connected with the inlet pipe 2; the top of the right cavity is provided with a water supplementing valve 7, one side of the right cavity is also connected with a water level limiting valve 10, and the level of the water level limiting valve 10 is higher than that of the communicating part of the bottoms of the two cavities.
In the embodiment, as shown in fig. 1, a water tank is used as a water container, the water tank is divided into a left cavity and a right cavity by a partition board, the bottoms of the two cavities are communicated to form a communicating vessel, the upper ends of the left cavity and the right cavity are provided with branch pipes connected with an inlet pipe, the branch pipes are in sealing connection with the water tank by using a flange, and the branch pipes are in sealing connection with the inlet pipe; an outlet pipe communicated with the atmosphere is arranged at the top of the right cavity, a short-circuit valve is arranged on a branch pipe of the right cavity and used for controlling the connection and the disconnection of the branch pipe and an inlet pipe of the right cavity, a water supplementing valve is arranged at the top of the right cavity, and a water level limit valve is arranged on a communicating part at the bottom and used for controlling the water level of water injected into a water container by the water supplementing valve;
When the device is used, the left cavity and the right cavity are communicated with the atmosphere, the water supplementing valve is filled with water, the water level limiting valve is opened until the water level limiting valve discharges water, the water level surface height is the water level valve height, the liquid level height of the left cavity is the B area at the moment in the figure 1, the liquid level height of the right cavity is the C area, and the bottoms of the two cavities are sealed by water because the water level limiting valve is higher than the bottom communicating part, at the moment, the device is connected with the purification and recovery system, and the purification and recovery system can work at ease.
After the purification recovery system works to produce tail gas, the short-circuit valve is opened, and the tail gas can enter the right cavity from the inlet pipe through the short-circuit valve and is discharged from the outlet pipe through the branch pipe.
When the purification and recovery system is about to stop working, the short-circuit valve is closed, the purification and recovery system can continue to work to generate tail gas, the tail gas can enter the left cavity to generate positive pressure in the left cavity, the positive pressure presses the water in the left cavity to the right cavity, when the water is pressed to the communicated position of the bottom, the gas which continuously enters the left cavity can enter the right cavity from the communicated position of the left cavity and the right cavity at the bottom of the left cavity, and then is discharged from the outlet pipe;
After the purification and recovery system is cooled, negative pressure is generated in the inner cavity of the purification and recovery system due to gas shrinkage, the left cavity is also subjected to the same negative pressure, the left cavity is isolated from the atmosphere due to the action of the communicating vessel, the liquid level of water in the left cavity is increased by the negative pressure and is higher than that of the right cavity, water in the right cavity enters the left cavity from the communicating position at the bottom of the water tank, after the liquid level rises by a certain height, the volume of the negative pressure of the purification and recovery system is supplemented by the volume of the water in the left cavity, and the liquid level of the water counteracts a part of the negative pressure, so that the pressure after the water rises by a certain liquid level and the pressure in the purification and recovery system are balanced, and at the moment, the purification and recovery system is sealed by water, isolated from the atmosphere, and oxygen cannot enter the purification and recovery system until reaction substances in the purification and recovery system wait for the purification and recovery system to drop to a safe temperature.
Wherein, be provided with oxygen detector in the inlet tube for prevent when reacting, do not have tail gas to produce and lead to oxygen in the air to get into purification recovery system, monitoring personnel can know whether purification recovery system operating condition is safe through oxygen detector.
Note that: the height of the water level limiting valve relative to the communicated position of the bottom is different in type and cavity volume of the extraction and purification device in the extraction and purification system, so that the tail pipe air locking device of the extraction agent purification and recovery system is selected according to the extraction and purification devices of different types, and the standard is selected according to the internal volume of the extraction and purification device; correspondingly, the horizontal position of the water level limiting valve is communicated with the bottom, and the horizontal position of the water level limiting valve is communicated with the volume formed by the cavity (namely the volume of the C area); optionally, the volume of zone C is equal to the internal volume of the extraction and purification apparatus.
Regarding the actual volume of the C region, calculation is performed by a volume expansion formula:
When the gas temperature is changed by 1 degree celsius, the ratio of its volume change to its volume at 0 ℃ is called the "volume expansion coefficient". The symbol is denoted by a. Let the volume of the material at 0deg.C be V 0, the volume at t deg.C be V t, the volume expansion formula be:
Vt=V0（1+αt）…………………………（1）
The gas temperature is derived from the change in gas volume as t 2 drops to t 1 according to equation (1):
△V=V2-V1=V1α（t2-t1）…………………………（2）
Whereas the actual volume V C > Δvof the C region
Example 2
On the basis of the embodiment 1, a self-sealing overflow bent pipe 9 is arranged on the water level limiting valve 10 of the right cavity; the volume of the cavity formed by the self-sealing overflow bent pipe 9 in the right cavity and the side wall of the right cavity is equal to the volume of the cavity formed by the water level limiting valve 10 in the right cavity and the side wall of the right cavity and the communicating position between the bottoms of the two cavities.
In this embodiment, since the tail gas passes through the device and the sealing medium in the device is water, when the tail gas passes through, more or less part of water vapor is taken away, when the working time of the purification and recovery system is longer, the water in the device is reduced, as shown in fig. 4, when the purification and recovery system is finished, the water in the device is too little, the water in the right cavity is insufficient to supplement the water needed by the negative pressure generated by the left cavity, so that the water needs to be supplemented in the device, if the short-circuit valve is closed, the short-circuit valve is in a positive pressure exhaust state, the water level limiting valve cannot be opened for balanced water supplementing, and at the moment, a self-sealing overflow bent pipe is needed to be arranged, and the self-sealing overflow bent pipe is designed according to the water level limiting valve, and the water supplementing is equal to the water level taking the water level limiting valve as a standard. So in the same cavity, the self-sealing overflow bent pipe is arranged above the water level limiting valve and is arranged at a position between the horizontal height of the water level limiting valve and the horizontal height of the communicating port and the side wall of the right cavity, wherein the volume formed by the self-sealing overflow bent pipe and the side wall of the right cavity is equal to the volume formed by the horizontal plane of the self-sealing overflow bent pipe and the horizontal plane of the water level limiting valve, namely the region D in fig. 2.
If the short-circuit valve is closed and is in a positive pressure exhaust state (positive pressure exhaust state in fig. 2), the water supplementing valve is opened to fill water until the self-sealing overflow bent pipe is discharged, and at the moment, the water quantity in the water tank is equal to the water supplementing water balanced and supplemented under the atmospheric pressure through the water level limiting valve, and the water can be effectively supplemented through the self-sealing overflow bent pipe.
The self-sealing overflow bent pipe is a U-shaped bent pipe, the inside of the bent pipe is similar to the design of a sewer bent pipe, certain water can be stored in the bent pipe, a certain air locking effect is achieved, tail gas is not discharged from the inside of the bent pipe, and therefore workshop environment is polluted.
Example 3
Based on embodiment 1 or embodiment 2, the volume of the cavity in the left cavity above the horizontal height of the water level limiting valve 10 is more than twice, and the volume of the cavity formed by the space between the horizontal height of the water level limiting valve 10 in the right cavity and the horizontal height of the communicating position of the bottoms of the two cavities and the side wall of the right cavity is more than twice. In the left cavity, the cavity volume formed by the water level limiting valve 10 and the side wall of the left cavity is equal to the cavity volume formed by the water level limiting valve 10 and the side wall of the right cavity between the water level limiting valve 10 and the side wall of the two cavities.
In this embodiment, as shown in fig. 1, fig. 2 and fig. 3, considering the cost problem, when the temperature of the purification and recovery system is reduced to be low enough, the volume of gas in the inner cavity of the purification and recovery system is reduced enough, at the moment, oxygen enters the purification and recovery system and cannot cause accidents, but water enters the purification and recovery system and can cause the mixing of extracting solution, so that the next purification work is not facilitated, water removal is time-consuming and labor-consuming, the maximum height of water rising is designed in the left cavity of the device, namely, the left cavity is fully filled with water above the level of the communicating position of the communicating vessel (namely, the area a and the area B) so that the whole cavity is not filled with water, and the volume of the cavity above the level of the water level limiting valve 10 in the left cavity is more than twice, and the volume of the cavity formed between the level of the water level limiting valve 10 in the right cavity and the level of the communicating position of the bottom of the two cavities and the side wall of the right cavity is formed. I.e. Va > 2Vc. The volume design of the area A is not equal to the volume of the area C, because in the positive pressure exhaust state, when the water is supplemented, the water level limiting valve is possibly closed, and when the water is supplemented, the left cavity is in the initial stage in the positive pressure exhaust state, and the supplemented water can be twice the water of the area C, so Va is designed to be more than 2Vc so as to prevent the worst condition, and the safety of the system is improved. The volumes of the left cavity and the right cavity cannot be too different, so that the volume of the cavity formed by the left cavity and the side wall of the left cavity is between the horizontal height of the water level limiting valve 10 and the horizontal height of the communicated position of the bottoms of the two cavities; is equal to the volume of the cavity formed by the right cavity side wall between the horizontal height of the water level limiting valve 10 and the horizontal height of the communicating position of the bottoms of the two cavities.
Example 4
On the basis of embodiment 1, embodiment 2 or embodiment 3, the oxygen sensor further comprises a main control circuit board and a power supply, wherein the short-circuit valve 4 is an electric control valve, and the main control circuit board is electrically connected with the power supply, the oxygen detector 3 and the short-circuit valve 4.
In this embodiment, as shown in fig. 1, an oxygen detector is installed at the inlet pipe, and an electric control valve is used as the short circuit valve, so that the opening of the short circuit valve can be automatically controlled according to the condition that air enters the inlet pipe, thereby achieving the purpose of automatic operation even if the operator is unattended. In this embodiment, the electrical control mechanism is by the main control circuit board of singlechip integrated, the power, the oxygen detector, the short-circuit valve is connected with the main control board, oxygen content information in position is collected to the oxygen detector, implement and report oxygen content data transmission to the main control circuit board, the main control circuit board receives the oxygen content and does corresponding action, when oxygen content is normal value, the short-circuit valve sets up to the open state, when oxygen content increases, the automatic shutdown short-circuit valve makes the system get into the lock gas state, realize real-time supervision, real-time control's purpose, effectively use manpower sparingly.
Example 5
On the basis of embodiment 1 or embodiment 2 or embodiment 3 or embodiment 4, the device further comprises a liquid level meter 8, wherein the liquid level meter 8 is arranged at the side wall of the water tank 1, the liquid level meter 8 is two communicating vessel type liquid level meters, and the two communicating vessel type liquid level meters are respectively arranged in the left cavity and the right cavity. The bottom of the water tank 1 is provided with a water outlet, and a waterproof plug 12 is arranged on the water outlet. Also comprises supporting legs 13, and at least three supporting legs 13 are arranged at the bottom of the water tank 1. The branch pipe is a metal hose 5. The outlet pipe 6 is an L-shaped bent pipe, and a downward groove is formed at the outlet of the outlet pipe 6.
In the embodiment, the liquid level meter is used for obtaining the liquid level heights of the left cavity and the right cavity, whether the left cavity and the right cavity are deficient in water or not is confirmed, if the water is deficient, water can be supplemented according to the liquid level meter, and the working state of the tail pipe air locking device of the extraction agent purifying and recycling system at the moment can be known according to the liquid level meter; the two preferred liquid level meters use a communicating liquid level meter, so that the liquid level height in the device can be more intuitively seen. The device can drain water in time when not using, get rid of the moisture, avoid the device to need not lead to rustting for a long time, influence secondary use, and metal collapsible tube can effectively save device cost, easy to assemble, and the exit of outlet pipe is established to 90 degrees elbows and is added down the groove, both reducible resistance can prevent the rainwater entering again.
In summary, the method for locking the tail pipe of the extraction agent purification and recovery system adopts the water medium for flexible isolation, when the evaporation speed of the extraction agent purification and recovery system is smaller than the condensation speed, the inlet cavity body generates negative pressure, water in the outlet cavity body can partially enter the inlet cavity body to compensate the volume difference, the pressure of the cavities at two ends is balanced by the water to isolate the air, and the safety accidents caused by the fact that oxygen in the air is sucked into the extraction agent purification and recovery system from the tail pipe are prevented.
The method specifically comprises the following steps: the invention is connected to a tail pipe of an extractant purifying and recycling system, namely a distillation condensing system. When the distillation condensing system is about to stop and the tail gas still has non-condensable gas after the short-circuit valve is closed, the inside of the A area of the inlet cavity is positive pressure, as shown in the attached figure 1, the non-condensable gas in the A area pushes water in the B area to enter the C area until the water in the B area is completely pressed into the C area, the gas floats out of the water surface from bottom to top along the outlet cavity and is discharged along the outlet pipe, so that the pressure balance relationship between the inlet cavity and the outlet cavity is reestablished; when no noncondensable gas is discharged from the tail gas of the distillation condensing system or the distillation amount is reduced, the temperature in the condenser is reduced, and the volume of noncondensable gas is reduced, so that the interior of the A region of the inlet cavity is negative pressure, as shown in figure 3, the right cavity is introduced with atmosphere, and the water in the C region can enter the B region under the pushing of atmospheric pressure to compensate the volume change of the noncondensable gas caused by the temperature reduction until the pressure balance relationship between the inlet cavity and the two sides of the outlet cavity is reestablished, and as Va is calculated and set to be greater than 2Vc, the original volume of the C region is not completely absorbed into the B region, the water is ensured not to flow back into the extraction agent purification and recovery system while the sealing state is maintained, the air in the D region is prevented from entering the A region when the extraction agent purification and recovery system is at high temperature, the positive pressure relief and the reverse locking effects are realized, and the characteristics of good sealing effect and high safety degree are realized.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in this embodiment are merely used to explain the relative positional relationship, movement, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
The technical solutions between the embodiments may be combined with each other, but it is necessary to base the implementation on the basis of those skilled in the art that when the combination of technical solutions contradicts or cannot be implemented, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.
Claims (8)
1. A tail pipe air locking device of an extractant purification recovery system, which is characterized in that the device comprises: the water tank is divided into a left cavity and a right cavity by a partition plate (11) fixed at the top of an inner cavity of the water tank (1) in the water tank (1), the bottoms of the two cavities are communicated to form a communicating vessel, the tops of the left cavity and the right cavity are respectively provided with a branch pipe communicated with an inlet pipe (2), an oxygen detector (3) is arranged in the inlet pipe (2), an outlet pipe (6) is arranged at the top of the right cavity, and a short-circuit valve (4) is further arranged on the branch pipe connected with the inlet pipe (2) at the top of the right cavity; the top of the right cavity is provided with a water supplementing valve (7), one side of the right cavity is also connected with a water level limiting valve (10), and the horizontal height of the water level limiting valve (10) is higher than that of the communicating part of the bottoms of the two cavities; the volume of the cavity above the horizontal height of the water level limiting valve (10) in the left cavity is more than twice, and the volume of the cavity formed between the horizontal height of the water level limiting valve (10) in the right cavity and the horizontal height of the communicating position of the bottoms of the two cavities and the side wall of the right cavity is more than twice;
Wherein, the volume formed by the horizontal position of the water level limiting valve (10) communicated with the bottom and the cavity is the volume of the C area;
Zone C volume is equal to the internal volume of the device;
The actual volume of region C is calculated by the volume expansion formula:
When the gas temperature changes by 1 degree celsius, the ratio of its volume change to its volume at 0 ℃ is called the "volume expansion coefficient"; the symbol is denoted by a; let the volume of the material at 0deg.C be V 0, the volume at t deg.C be V t, the volume expansion formula be:
Vt=V0（1+αt）…………………………（1）
The gas temperature is derived from the change in gas volume as t 2 drops to t 1 according to equation (1):
△V=V2-V1=V1α（t2-t1）…………………………（2）
whereas the actual volume V C of the C region is Δv.
2. The tail pipe air locking device of the extraction agent purifying and recycling system according to claim 1, wherein a self-sealing overflow bent pipe (9) is arranged above the water level limiting valve (10) of the right cavity; the volume of a cavity formed between the horizontal height of the self-sealing overflow bent pipe (9) in the right cavity and the horizontal height of the water level limiting valve (10) and the side wall of the right cavity is equal to the volume of a cavity formed between the horizontal height of the water level limiting valve (10) in the right cavity and the horizontal height of the communicating position of the bottoms of the two cavities and the side wall of the right cavity.
3. The tail pipe air locking device of the extraction agent purifying and recycling system according to claim 1, wherein the volume of a cavity formed by the tail pipe air locking device between the horizontal height of the water level limiting valve (10) in the left cavity and the horizontal height of the communicating position of the bottoms of the two cavities and the side wall of the left cavity is equal to the volume of a cavity formed by the tail pipe air locking device between the horizontal height of the water level limiting valve (10) in the right cavity and the horizontal height of the communicating position of the bottoms of the two cavities and the side wall of the right cavity.
4. The tail pipe air locking device of the extractant purifying and recycling system according to claim 1, further comprising a main control circuit board and a power supply, wherein the short-circuit valve (4) is an electric control valve, and the main control circuit board is electrically connected with the power supply, the oxygen detector (3) and the short-circuit valve (4).
5. The tail pipe air locking device of the extraction agent purification and recovery system according to claim 1, further comprising a liquid level meter (8), wherein the liquid level meter (8) is arranged at the side wall of the water tank (1), and the liquid level meter (8) is two communicating vessel type liquid level meters which are respectively arranged in the left cavity and the right cavity.
6. A tail pipe air locking device of an extractant purifying and recovering system as claimed in claim 1, wherein a water outlet is arranged at the bottom of the water tank (1), and a waterproof plug (12) is arranged on the water outlet.
7. A tail pipe air locking device of an extractant purifying and recovering system as claimed in claim 1 further comprising legs (13), wherein the bottom of the water tank (1) is provided with at least three legs (13).
8. The tail pipe locking method of the tail pipe locking device of the extracting agent purifying and recycling system according to any one of claims 1-7, wherein an aqueous medium is used for flexible isolation, when the evaporating speed of the extracting agent purifying and recycling system is smaller than the condensing speed, the inlet cavity generates negative pressure, water in the outlet cavity can partially enter the inlet cavity to compensate the volume difference, water balances the pressure of the cavities at two ends to isolate air, and oxygen in the air is prevented from being sucked into the extracting agent purifying and recycling system from the tail pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746026.9A CN108679268B (en) | 2018-07-09 | 2018-07-09 | Tail pipe air locking device and method of extractant purifying and recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746026.9A CN108679268B (en) | 2018-07-09 | 2018-07-09 | Tail pipe air locking device and method of extractant purifying and recycling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108679268A CN108679268A (en) | 2018-10-19 |
| CN108679268B true CN108679268B (en) | 2024-04-30 |
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| CN201810746026.9A Active CN108679268B (en) | 2018-07-09 | 2018-07-09 | Tail pipe air locking device and method of extractant purifying and recycling system |
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