CN210786298U - Pyrolysis gas grading treatment device - Google Patents
Pyrolysis gas grading treatment device Download PDFInfo
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- CN210786298U CN210786298U CN201921649341.6U CN201921649341U CN210786298U CN 210786298 U CN210786298 U CN 210786298U CN 201921649341 U CN201921649341 U CN 201921649341U CN 210786298 U CN210786298 U CN 210786298U
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Abstract
A pyrolysis gas grading treatment device comprises a contact condenser and a dividing wall type condenser; the contact condenser comprises a first tank body and a spraying device; the first tank body is provided with a first air inlet, a first liquid outlet and a first air outlet; the dividing wall type condenser comprises a second tank body, and the second tank body is provided with an accommodating cavity and a cooling medium cavity; the second tank body is provided with a second air inlet, a second air outlet, a second liquid outlet, a cooling liquid inlet and a cooling liquid outlet; the first exhaust port is connected with the second air inlet, the second exhaust port is connected with the gas-liquid separator, and the second liquid outlet is connected with the oil-water separator. The pyrolysis gas stage treatment device is provided with a contact condenser and a dividing wall type condenser, and is used for carrying out multi-stage cooling and condensation on the pyrolysis gas, so that heavy oil, light oil and wastewater are condensed out step by step, the oil in the pyrolysis gas is fully and classified recovered, the availability of recovered oil is improved, the consumption of spray water is reduced, and the amount of generated wastewater is reduced.
Description
Technical Field
The utility model belongs to the waste treatment equipment field especially relates to a pyrolysis gas stage treatment device.
Background
The oily waste is one of the main wastes of oil fields and refining and chemical enterprises, and has wide sources, various varieties, complex components and high treatment difficulty. According to incomplete statistics, 380 million tons of oil-containing waste is newly added in China every year, the historical residual quantity exceeds 1000 million tons, and the environmental pressure is huge. In the face of severe environmental situation, a plurality of oil-containing waste treatment technologies, such as incineration treatment, biological treatment, solvent extraction, chemical heat washing, curing treatment, pyrolysis treatment, landfill treatment, supercritical water oxidation and profile control technical treatment, are developed at home and abroad, but all have certain limitations in the actual field application process, and cannot meet the increasingly strict requirements of new environmental protection: for example, indexes after chemical hot washing treatment cannot meet the environmental protection requirement, the biological treatment period is long, the secondary pollution of the incineration technology is serious, and the like.
The pyrolysis technology is characterized in that under the condition of high temperature and no oxygen, organic pollutants in the oily waste are subjected to evaporation, pyrolysis and other actions, oil and water in the oily waste are finally and thoroughly separated from a solid phase, and petroleum resources are recycled, so that harmless treatment and resource utilization of the oily waste are realized. The pyrolysis technology has received more and more attention and industry acceptance in the field of oily waste treatment due to its technical advantages of safety, environmental protection, high efficiency and thoroughness, and has become the most promising oily waste treatment technology at present.
The pyrolysis technology mainly comprises a feeding and discharging system, a pyrolysis system and an oil gas condensation and recovery system, wherein the oil gas condensation and recovery system and device directly influence the resource utilization of oily wastes. The condensation technique that uses always at present is mostly simple single-stage condensation technique, including water spray condensation technique, tube heat transfer condensation technique and oil spray condensation technique, and single-stage water spray process sprays the water yield big, and the condensation is effectual, nevertheless leads to the water oil separating load big simultaneously, and the waste water yield of production is big, and the emulsification of recovered oil is serious, and the oil quality is relatively poor. By adopting a shell-and-tube heat exchange condensation technology, a cooling medium can be recycled, no extra wastewater is generated, and the heavy oil with high viscosity is easy to cause the blockage of the tubes. The oil spraying technology has the advantages of less waste water generation amount and lower emulsification degree of recovered oil, but the specific heat of oil is small, the circulating amount of sprayed oil is large, and the operation requirement and the safety risk are higher. Therefore, the development of an efficient pyrolysis gas condensation process and device is urgently needed to promote the maximization of resource utilization and the optimization of harmless treatment of the oil-containing waste pyrolysis technology.
SUMMERY OF THE UTILITY MODEL
The utility model discloses there is the emulsification of recovery oil serious, viscosity to the condensation recovery system and the device of current oil gas and easily blocks up, operating requirement and the higher technical problem of safe risk greatly, provides a pyrolysis gas stage treatment device that emulsification degree is light, difficult jam, operating requirement and safe risk are lower.
In order to achieve the above object, the utility model discloses a technical scheme be:
a pyrolysis gas grading treatment device comprises a contact condenser and a dividing wall type condenser;
the contact condenser comprises a first tank body and a spraying device which is arranged in the first tank body and used for spraying water;
the first tank body is provided with a first air inlet for feeding pyrolysis gas, a first liquid discharging port for discharging liquid and a first air outlet for discharging gas;
the dividing wall type condenser comprises a second tank body, and the second tank body is provided with an accommodating cavity and a cooling medium cavity which can exchange heat;
the second tank body is provided with a second air inlet for feeding air into the accommodating cavity, a second air outlet for discharging air in the accommodating cavity, a second liquid outlet for discharging liquid in the accommodating cavity, a cooling liquid inlet connected with the cooling medium cavity for feeding cooling liquid and a cooling liquid outlet connected with the cooling medium cavity for feeding cooling liquid;
the first exhaust port is connected with the second air inlet, the second exhaust port is connected with the gas-liquid separator, and the second liquid outlet is connected with the oil-water separator.
Preferably, the cooling medium cavity is a coil pipe arranged in the second tank body, the cooling liquid inlet is connected with one end of the coil pipe, and the cooling liquid outlet is connected with the other end of the coil pipe.
Preferably, the accommodating cavity is divided into a first accommodating cavity and a second accommodating cavity which are positioned at two ends of the second tank body, the first accommodating cavity and the second accommodating cavity are communicated through a plurality of tubes, and the tubes penetrate through the cooling medium cavity.
Preferably, the spraying device is connected with a first liquid inlet arranged on the first tank body, and the first liquid inlet is connected with a condensing medium storage tank stored with water and used for supplying water to the spraying device.
Preferably, the spray device and the first exhaust port are located at the upper part of the first tank, and the first air inlet and the first liquid outlet are located at the lower part of the first tank.
Preferably, the first exhaust port and the first liquid exhaust port are located at the top end and the bottom end of the first tank body respectively.
Preferably, the second air inlet is located on one side of the cooling medium chamber, and the second liquid outlet and the second air outlet are located on the other side of the cooling medium chamber.
Preferably, the cooling medium cavity is located in the middle of the second tank, and the second air inlet and the second liquid outlet are located at the top end and the bottom end of the second tank respectively.
Preferably, a liquid outlet of the gas-liquid separator is connected with a liquid inlet of the oil-water separator.
Preferably, the air outlet of the gas-liquid separator is connected with a fan and a gas purifier.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. the pyrolysis gas stage treatment device is provided with a contact condenser and a dividing wall type condenser, and is used for carrying out multi-stage cooling and condensation on the pyrolysis gas, so that heavy oil, light oil and wastewater are condensed out step by step, the oil in the pyrolysis gas is fully and classified recovered, the availability of recovered oil is improved, the consumption of spray water is reduced, and the amount of generated wastewater is reduced.
2. Heavy oil in pyrolysis gas can be condensed by the contact condenser, so that gas containing the light oil enters the dividing wall type condenser, the emulsification of oil condensed by the dividing wall type condenser is reduced, the quality of recovered oil is improved, and the recovery and utilization are facilitated. And before entering the dividing wall type condenser, the heavy oil is condensed out, so that the dividing wall type condenser is not easy to be blocked by oil.
3. The contact condenser sprays the pyrolysis gas by spraying water without adopting oil spraying, the circulating volume of water for spraying is small, and the operation requirement and the safety risk are reduced.
4. The liquid phase separated by the gas-liquid separator can be sent into an oil-water separator for further oil-water separation, so that all oil in the gas can be separated, and the recovery rate of the oil is improved.
Drawings
FIG. 1 is a system structure diagram of the pyrolysis gas stage treatment device of the present invention;
in the above figures: 1. a contact condenser; 11. a first tank; 111. a first air inlet; 112. a first drain port; 113. a first exhaust port; 12. a spraying device; 2. a dividing wall type condenser; 21. a second tank; 211. a second air inlet; 212. a second liquid discharge port; 213. a second exhaust port; 214. a coolant inlet; 215. a coolant outlet; 22. a coil pipe; 3. a gas-liquid separator; 4. an oil-water separator; 5. a condensing medium storage tank; 6. a fan; 7. a gas purifier; 8. and an oil storage tank.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in figure 1, the utility model provides a pyrolysis gas stage treatment device, which comprises a contact condenser 1 and a dividing wall type condenser 2.
The contact condenser 1 comprises a first tank body 11, a spraying device 12 is arranged in the first tank body 11, the spraying device 12 is a plurality of nozzles, and sprays water into the first tank body 11 to cool and condense the fed pyrolysis gas.
The first tank 11 is provided with a first air inlet 111, a first liquid outlet 112, and a first air outlet 113.
Pyrolysis gas generated by pyrolysis is sent into the first tank body 11 through the first gas inlet 111, and the pyrolysis gas is sprayed by the spraying device 12 for condensation.
The heavy oil condensed from the pyrolysis gas is discharged through the first liquid outlet 112 for collection and reuse.
Because the temperature of the pyrolysis gas is higher, the water sprayed by the spraying device 12 is heated and vaporized into water vapor after contacting the pyrolysis gas.
The uncondensed part of the pyrolysis gas after being sprayed and the steam generated by vaporization and evaporation of the sprayed water are sent out of the first tank body 11 through the first exhaust port 113.
The dividing wall type condenser 2 includes a second tank 21, and the second tank 21 is provided with a receiving chamber and a cooling medium chamber capable of heat exchange.
The cooling liquid flowing in the cooling medium cavity can exchange heat with the gas in the accommodating cavity, and the gas in the accommodating cavity is condensed.
The second tank 21 is provided with a second air inlet 211, a second air outlet 213, a second liquid outlet 212, a coolant inlet 214, and a coolant outlet 215.
The coolant inlet 214 is connected to the coolant chamber to feed the coolant at a low temperature into the coolant chamber. The cooling liquid outlet 215 is connected to the cooling medium chamber, and the cooling liquid flowing in the cooling medium chamber and performing heat exchange with the gas in the accommodating chamber flows out through the cooling liquid outlet 215. The cooling medium chamber is sent back to after the cooling liquid cooling of outflow, and the circulation flows, and the gas that lasts to holding the intracavity is cooled down the condensation.
The second gas inlet 211 is connected with the first gas outlet 113, and sends the uncondensed part of the pyrolysis gas sent out by the first gas outlet 113 after spraying and the vapor generated by vaporization and evaporation of the spray water into the accommodating cavity in the second tank 21, and exchanges with the cooling liquid flowing in the cooling medium cavity, so as to further condense the gas entering the accommodating cavity.
The mixed liquid of the light oil and the condensed water condensed after passing through the cooling medium chamber can be discharged out of the accommodating chamber through the second liquid discharge port 212. The second liquid outlet 212 is connected with the oil-water separator 4, separates the light oil and the condensed water in the mixed liquid discharged from the second liquid outlet 212, collects and recycles the separated light oil, and discharges or sends the separated water to the spraying device 2 for spraying and cooling.
The gas in the accommodating chamber in the second tank 21 which has passed through the cooling medium chamber and is not condensed is discharged through the second gas outlet 213. In order to further fully recover the oil, the second exhaust port 213 is connected to the gas-liquid separator 3, a liquid outlet of the gas-liquid separator 3 is connected to a liquid inlet of the oil-water separator 4, so that the uncondensed gas and the carried liquid phase passing through the cooling medium cavity are fed into the gas-liquid separator 3, the light oil and the condensed water mixed liquid carried by the uncondensed gas are separated by the gas-liquid separator 3 and fed into the oil-water separator 4, and the light oil and the condensed water in the mixed liquid are separated.
The gas outlet of the gas-liquid separator 3 is connected with a gas purifier 7, and after the separation of the gas-liquid separator 3, the residual non-condensable gas is discharged through the gas outlet and is purified by the gas purifier 7 and then discharged into the atmosphere.
In order to discharge the non-condensable gas in the gas-liquid separator 3 more quickly, a fan 6 is arranged on a pipeline between the gas-liquid separator 3 and the gas purifier 7 to provide power for the flowing of the gas.
Pyrolysis gas is sprayed by the contact condenser to condense heavy oil, sprayed water is changed into steam to flow out, the heavy oil can be independently recovered by the contact condenser, oil components in gas entering the dividing wall type condenser 2 are less, the concentration is lower, and after the dividing wall type condenser 2 condenses the gas, the light oil is condensed out, so that the dividing wall type condenser 2 cannot be blocked.
Heavy oil and light oil are respectively condensed out in the contact condenser 1 and the dividing wall type condenser 2, so that the oil in the pyrolysis gas is classified and recovered, and the oil is conveniently recycled in the follow-up process.
The gas-liquid separator 3 can separate light and water carried in the noncondensable gas, thereby recovering oil in the gas to the maximum extent and improving the recovery rate.
The accommodation chamber and the cooling medium chamber in the second tank 21 may be provided in various arrangements.
The first method is as follows:
a coil 22 is arranged in the second tank body 21, the space in the coil 22 is used as a cooling medium cavity, and the inner cavity of the second tank body 21 outside the coil 22 is used as an accommodating cavity, so that the immersion type coil condenser is formed.
The coolant inlet 214 is connected to one end of the coil 22, and the coolant outlet 215 is connected to the other end of the coil 22, so that the coolant in the coil 22 circulates to remove heat for cooling.
The second method comprises the following steps:
the holding cavity is divided into a first holding cavity and a second holding cavity which are positioned at two ends of the second tank body 21, the first holding cavity and the second holding cavity are communicated through a plurality of tubes, and the tubes all penetrate through the cooling medium cavity, so that a dividing wall type tube-in-tube condenser is formed.
The gas flows into the second accommodating cavity through the tubes from the first accommodating cavity, and exchanges heat with cooling liquid in the cooling medium cavity when flowing through the tubes, so that heat is taken away and cooling is performed.
In order to supply water to the spraying device 12, the spraying device 12 is connected with a first liquid inlet 114 arranged on the first tank body 11, the first liquid inlet 114 is connected with a condensing medium storage tank 5 for storing water, the water stored in the condensing medium storage tank 5 is sent to the spraying device 12 in the first tank body 11 through the first liquid inlet 114, and the pyrolysis gas in the first tank body 11 is sprayed.
In order to fully spray the pyrolysis gas, the spraying device 12 and the first exhaust port 113 are positioned at the upper part of the first tank body 11, the first gas inlet 111 and the first exhaust port 112 are positioned at the lower part of the first tank body 11, so that the first gas inlet 111 is positioned below the spraying device 12, and water sprayed by the spraying device 12 falls down and can contact the pyrolysis gas entering from the first gas inlet 111 to fully spray and cool the pyrolysis gas. The evaporated water vapor can rise and be rapidly discharged through the upper first discharge port 113, and the condensed heavy oil can flow down to the lower first discharge port 112 to be discharged.
The first gas outlet 113 and the first liquid outlet 112 are respectively positioned at the top end and the bottom end of the first tank 11, so that the ascending gas and the descending heavy oil can completely leave the first tank 11, and the gas or liquid retention in the first tank 11 is avoided.
The first drain port 112 is connected with the oil storage tank 8, and the heavy oil flowing out through the first drain port 112 enters the oil storage tank 8 to be stored so as to be recycled.
In order to perform sufficient heat exchange with the gas, the second inlet 211 is located at one side of the cooling medium chamber, and the second outlet 212 and the second outlet 213 are located at the other side of the cooling medium chamber, so that the gas must pass through the cooling medium chamber to be discharged, and the gas is sufficiently in contact with the cooling medium chamber to perform heat exchange.
The cooling medium chamber is located at the middle of the second tank 21, and the second inlet port 211 and the second outlet port 212 are located at the top end and the bottom end of the second tank 21, respectively.
The gas flows in from the second gas inlet 211 at the top end, and can flow downwards completely to be condensed, so that the gas is prevented from being retained at the top of the second tank 21. The second drain port 212 at the bottom end enables the mixed liquid of the condensed light oil and the condensed water to be completely discharged, thereby avoiding stagnation.
Claims (10)
1. The pyrolysis gas grading treatment device is characterized by comprising a contact condenser (1) and a dividing wall type condenser (2);
the contact condenser (1) comprises a first tank body (11) and a spraying device (12) which is arranged in the first tank body (11) and used for spraying water;
the first tank body (11) is provided with a first air inlet (111) for feeding pyrolysis gas, a first liquid discharging port (112) for discharging liquid and a first air discharging port (113) for discharging gas;
the dividing wall type condenser (2) comprises a second tank body (21), and the second tank body (21) is provided with an accommodating cavity and a cooling medium cavity which can exchange heat;
the second tank body (21) is provided with a second air inlet (211) for feeding air into the accommodating cavity, a second air outlet (213) for discharging air in the accommodating cavity, a second liquid outlet (212) for discharging liquid in the accommodating cavity, a cooling liquid inlet (214) connected with the cooling medium cavity for feeding cooling liquid and a cooling liquid outlet (215) connected with the cooling medium cavity for feeding cooling liquid;
the first exhaust port (113) is connected with the second air inlet (211), and the second drain port (212) is connected with the oil-water separator (4).
2. The apparatus for fractionation of pyrolysis gas according to claim 1, wherein the cooling medium chamber is a coil (22) provided in the second tank (21), the coolant inlet (214) is connected to one end of the coil (22), and the coolant outlet (215) is connected to the other end of the coil (22).
3. The staged pyrolysis gas treatment device according to claim 1, wherein the holding chamber is divided into a first holding chamber and a second holding chamber at two ends of the second tank (21), the first holding chamber and the second holding chamber are communicated through a plurality of tubes, and the tubes penetrate through the cooling medium chamber.
4. The apparatus according to claim 1, wherein the second exhaust port (213) is connected to a gas-liquid separator (3), and a liquid outlet of the gas-liquid separator (3) is connected to a liquid inlet of the oil-water separator (4).
5. A pyrolysis gas staged treatment apparatus according to claim 4, wherein the gas-liquid separator (3) is provided with a gas outlet connected to a fan (6) and a gas purifier (7).
6. The apparatus according to claim 1, characterized in that the spraying device (12) is connected to a first liquid inlet (114) provided in the first tank (11), and the first liquid inlet (114) is connected to a storage tank (5) for a condensing medium storing water, for supplying water to the spraying device (12).
7. The apparatus for staged treatment of pyrolysis gas according to claim 1, wherein the sparger (12) and the first gas outlet (113) are located at an upper portion of the first tank (11), and the first gas inlet (111) and the first liquid outlet (112) are located at a lower portion of the first tank (11).
8. The apparatus for fractionation of pyrolysis gas according to claim 7, wherein the first exhaust port (113) and the first liquid exhaust port (112) are located at the top end and the bottom end of the first tank (11), respectively.
9. The apparatus according to claim 1, wherein the second gas inlet (211) is located on one side of the cooling medium chamber, and the second liquid outlet (212) and the second gas outlet (213) are located on the other side of the cooling medium chamber.
10. The apparatus for staged treatment of pyrolysis gas according to claim 9, wherein the cooling medium chamber is located in the middle of the second tank (21), and the second gas inlet (211) and the second liquid outlet (212) are located at the top end and the bottom end of the second tank (21), respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921649341.6U CN210786298U (en) | 2019-09-29 | 2019-09-29 | Pyrolysis gas grading treatment device |
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| CN201921649341.6U CN210786298U (en) | 2019-09-29 | 2019-09-29 | Pyrolysis gas grading treatment device |
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| CN210786298U true CN210786298U (en) | 2020-06-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022141677A1 (en) * | 2020-12-31 | 2022-07-07 | 杰瑞环保科技有限公司 | Apparatus and method for synergistic treatment of liquid-containing oil sludge by pyrolysis gas condensation |
| CN114853301A (en) * | 2022-04-20 | 2022-08-05 | 常州大学 | Oil-based mud treatment device and oil-based mud treatment method |
| CN114874795A (en) * | 2022-04-27 | 2022-08-09 | 浙江长三角聚农科技开发有限公司 | Device and method for extracting tar and biomass oil from biomass pyrolysis gas |
-
2019
- 2019-09-29 CN CN201921649341.6U patent/CN210786298U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022141677A1 (en) * | 2020-12-31 | 2022-07-07 | 杰瑞环保科技有限公司 | Apparatus and method for synergistic treatment of liquid-containing oil sludge by pyrolysis gas condensation |
| CN114853301A (en) * | 2022-04-20 | 2022-08-05 | 常州大学 | Oil-based mud treatment device and oil-based mud treatment method |
| CN114874795A (en) * | 2022-04-27 | 2022-08-09 | 浙江长三角聚农科技开发有限公司 | Device and method for extracting tar and biomass oil from biomass pyrolysis gas |
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