High-temperature deodorization equipment for treating waste gas by using waste grease

Abstract

The utility model discloses high-temperature deodorization equipment for treating waste gas by using waste grease, which comprises an air extractor and a high-temperature treatment device, and an air inlet of the air extractor is communicated with treatment equipment of the waste grease; the high-temperature treatment device comprises a treatment pipeline, a flame arrester and a heater, the gas inlet end of the treatment pipeline is communicated with the gas outlet of the gas extractor, and the flame arrester and the heater are sequentially arranged in the treatment pipeline in the gas flowing direction. Compared with the prior art, the high-temperature deodorization equipment for treating the waste gas from the waste grease provided by the utility model has the advantages that a high-temperature environment is generated by utilizing the heater, and when low-molecular odor substances pass through, the odor substances are heated to be carbonized, so that the aim of deodorization is fulfilled.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field, concretely relates to a high temperature deodorization equipment for waste oil treatment waste gas. BACKGROUND

[0002] The waste oil crude biodiesel is a mixture of complex organic components with high oxygen content, and the mixture is mainly some organic fatty acid esters with large molecular weight, and also contains oxygen-containing organic matters such as esters, ethers, aldehydes, ketones, phenols, organic acids and alcohols. The putrefactive material of protein, the low-molecular fatty acid esters, fatty acids, fatty aldehydes and fatty ketones generated by hydrolysis, oxidation and rancidity of the waste oil are also contained in the mixture. In the production process, high-temperature cracking generates some odor gases such as aldehydes and ketones, and some residual methanol also has a pungent odor. Most of the odor gases are absorbed by the water ring condensation in the vacuum pump, but a part of the odor gases is discharged in the form of non-condensable gas, which causes air pollution and unpleasant odor in the working environment if not treated.

[0003] At present, in the biodiesel production, the odor at the outlet of the water ring vacuum pump in the vacuum unit during operation is very large, which easily causes odor pollution, especially when propylene aldehyde exists, people will shed tears when 1PPm is reached in 1m³ of air, which not only affects human health, but also causes pollution of the surrounding environment to different degrees.

[0004] In the prior art, the gas is usually treated by methods such as alkali washing, deodorization spraying and ultraviolet oxidation, but the treatment effect is not significant, and the odor is difficult to completely eliminate. It is found in the actual use of the above methods that the methods lack pertinence, and the results have serious defects, such as equipment expansion, high production operation cost and low efficiency. Therefore, improvement is necessary. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the above technical defects, and provides a high-temperature deodorization equipment for waste oil treatment waste gas, which solves the technical problem of unsatisfactory deodorization effect of the odor waste gas generated in the waste oil treatment in the prior art.

[0006] In order to achieve the above technical purposes, the utility model adopts the following technical scheme:

[0007] The utility model provides a high-temperature deodorization equipment for waste oil treatment waste gas, which comprises: an air extraction device, an air inlet of the air extraction device is communicated with a treatment equipment of waste oil; a high-temperature treatment device, the high-temperature treatment device comprises a treatment pipeline, a fire arrestor and a heater, an air outlet of the air extraction device is communicated with an air inlet end of the treatment pipeline, and the fire arrestor and the heater are sequentially arranged in the treatment pipeline along the gas flow direction.

[0008] In some embodiments, the processing pipeline is L-shaped, comprising a vertical pipe and a horizontal pipe in communication with each other, the horizontal pipe being in communication with the gas outlet of the air extraction device, the flame arrester being arranged in the horizontal pipe, and the heater being arranged in the vertical pipe.

[0009] In some embodiments, the vertical pipe is arranged vertically, and the horizontal pipe is arranged horizontally, the lower end of the vertical pipe being in communication with the horizontal pipe, and the high-temperature processing device further comprising a slag discharge valve arranged at the bottom of the vertical pipe.

[0010] In some embodiments, the high-temperature processing device further comprises a sight glass arranged at the connection between the horizontal pipe and the vertical pipe.

[0011] In some embodiments, the high-temperature processing device further comprises a thermal insulation layer wrapped around the vertical pipe where the heater is arranged.

[0012] In some embodiments, the heater is in a tubular structure and is arranged inside the vertical pipe, the outer wall of the heater being fixedly connected with the inner wall of the vertical pipe, and a high-temperature deodorization cavity being formed inside the heater.

[0013] In some embodiments, the high-temperature processing device further comprises a temperature sensor and a first PLC controller, the temperature sensor being arranged in the high-temperature deodorization cavity, the temperature sensor being in signal transmission connection with the first PLC controller, and the first PLC controller being in signal control connection with the heater.

[0014] In some embodiments, a buffer tank is further included, the air extraction device is a water ring vacuum pump, the gas outlet of the water ring vacuum pump being in communication with the buffer tank, the top of the buffer tank being in communication with the horizontal pipe, and the bottom of the buffer tank being in communication with the liquid inlet of the water ring vacuum pump through a liquid pipe.

[0015] In some embodiments, a plate heat exchanger is further included, the plate heat exchanger being arranged on the liquid pipe for cooling the liquid in the liquid pipe.

[0016] In some embodiments, a liquid extraction pump, a liquid level sensor, and a second PLC controller are further included, the inlet of the liquid extraction pump being in communication with the liquid pipe, the liquid level sensor being arranged on the buffer tank, the liquid level sensor being in signal transmission connection with the second PLC controller, and the second PLC controller being in signal control connection with the liquid extraction pump.

[0017] Compared with the prior art, the high-temperature deodorization equipment for waste gas in waste oil treatment provided by the utility model utilizes the heater to generate a high-temperature environment, heats the odorant when the low-molecular odorant passes through, and carbonizes the odorant, so that the deodorization purpose is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structural schematic view of the high-temperature deodorization equipment for waste gas in waste oil treatment provided by the utility model embodiment. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0020] In order to solve the technical problem that the deodorization effect of the foul-smelling waste gas generated in the waste oil treatment is not ideal, the utility model provides a high-temperature deodorization equipment for waste oil treatment waste gas, which realizes simple and efficient deodorization of the foul-smelling waste gas by carbonizing the foul-smelling substances through high temperature.

[0021] It should be noted that the high-temperature deodorization equipment for waste oil treatment waste gas is used for but not limited to the waste gas generated in the waste oil treatment, in order to facilitate the description, in the utility model, only the high-temperature deodorization equipment for waste oil treatment waste gas is taken as an example to deodorize the waste gas generated in the waste oil treatment, and the principle of the high-temperature deodorization equipment for waste oil treatment waste gas applied to other waste gas deodorization is substantially the same as the principle of the high-temperature deodorization equipment for waste oil treatment waste gas applied to the waste gas generated in the waste oil treatment, which will not be described one by one here.

[0022] Please refer to Figure 1 , Figure 1 It is the structure schematic view of the high-temperature deodorization equipment for waste oil treatment waste gas in an embodiment of the utility model, which comprises a gas suction device 1 and a high-temperature treatment device 2.

[0023] The gas inlet of the gas suction device 1 is communicated with the waste oil treatment equipment, and the gas outlet is communicated with the high-temperature treatment device 2. The gas suction device 1 is used for sucking the waste gas generated in the waste oil treatment equipment into the high-temperature treatment device 2 for deodorization treatment, and then discharging after removing the foul-smelling substances.

[0024] The high-temperature treatment device 2 comprises a treatment pipeline 21, a fire barrier 22 and a heater 23. The gas inlet end of the treatment pipeline 21 is communicated with the gas outlet of the gas suction device 1. Along the gas flow direction, the fire barrier 22 and the heater 23 are sequentially arranged in the treatment pipeline 21. The heater 23 can generate a high-temperature environment, so that the foul-smelling substances are carbonized at high temperature when the gas passes through, thereby being removed. Since the foul-smelling substances are generally combustible organic substances, they are prone to burning in a high-temperature environment. The fire barrier 22 is arranged to avoid the flame spreading along the treatment pipeline 21, causing damage to the gas suction device 1 or even the waste oil treatment equipment.

[0025] In some examples, the treatment pipeline 21 is L-shaped, which comprises a vertical pipe 211 and a horizontal pipe 212 communicated with each other. The horizontal pipe 212 is communicated with the gas outlet of the gas suction device 1, the fire barrier 22 is arranged in the horizontal pipe 212, and the heater 23 is arranged in the vertical pipe 211.

[0026] In some embodiments, heater 23 is a tubular structure built into vertical tube 211. The outer wall of heater 23 is fixedly connected to the inner wall of vertical tube 211, forming a high-temperature deodorization chamber within heater 23. When gas passes through the center of heater 23, malodorous substances are heated and carbonized. Heater 23 is typically an electric heater, and can be made of a heating wire wound into a tubular shape.

[0027] In this embodiment, vertical pipe 211 is arranged vertically, and horizontal pipe 212 is arranged horizontally. The lower end of vertical pipe 211 is connected to horizontal pipe 212. High-temperature treatment device 2 also includes a slag discharge valve 24, which is located at the bottom of vertical pipe 211. After being heated and carbonized by heater 23, malodorous substances fall and accumulate at the bottom of vertical pipe 211. Opening slag discharge valve 24 allows the carbon residue to be discharged.

[0028] In some embodiments, the high-temperature treatment device 2 further includes a sight glass 25, which is disposed at the junction of the horizontal tube 212 and the vertical tube 211. Through the sight glass 25, the operator can observe the accumulation of carbon residue at the bottom of the vertical tube 211 and promptly open the slag discharge valve 24 to discharge the residue. Those skilled in the art will readily appreciate that, due to the high temperature of the carbon residue, the sight glass 25 must be heat-resistant to prevent damage from the carbon residue.

[0029] In some embodiments, the high-temperature processing device 2 further includes an insulation layer 26, which covers the exterior of the vertical tube 211 where the heater 23 is located. The insulation layer 26 is preferably longer than the heater 23, extending a certain distance at its upper and lower ends to achieve better insulation. In this embodiment, the upper and lower ends of the insulation layer 26 each extend 30 cm beyond the upper and lower ends of the heater 23.

[0030] In some embodiments, the high-temperature treatment device 2 also includes a temperature sensor 27 and a first PLC controller 28. The temperature sensor 27 is arranged in the high-temperature deodorization chamber to measure the temperature in the high-temperature deodorization chamber. The temperature sensor 27 is connected to the first PLC controller 28 for signal transmission, and the first PLC controller 28 is connected to the heater 23 for signal control. The first PLC controller 28 can control the start and stop of the heater 23 according to the temperature data measured by the temperature sensor 27, or control the output power of the heater 23, so that the temperature in the heating chamber is maintained within the required range. This temperature can not only fully remove odorous substances, but also avoid accidents caused by excessive temperature. In this embodiment, the first PLC controller 28 can adopt Rockwell's 1756 series PLC module or 1794 series PLC module.

[0031] In the present embodiment, the upper limit of the temperature of the high-temperature deodorization chamber is 510°C, and the lower limit of the temperature of the high-temperature deodorization chamber is 500°C. When the temperature sensor 27 detects that the temperature of the high-temperature deodorization chamber reaches the upper limit of 510°C, the first PLC controller 28 controls the heater 23 to be turned off or to reduce the output power, so that the temperature of the high-temperature deodorization chamber decreases. When the temperature sensor 27 detects that the temperature of the high-temperature deodorization chamber reaches the lower limit of 500°C, the first PLC controller 28 controls the heater 23 to be turned on or to increase the output power, so that the temperature of the high-temperature deodorization chamber increases. In this way, the temperature of the high-temperature deodorization chamber is kept within the specified range.

[0032] In some embodiments, the air extraction device 1 adopts a water ring vacuum pump. The present high-temperature deodorization equipment further comprises a buffer tank 3, the air outlet of the water ring vacuum pump 1 is communicated with the buffer tank 3, the top of the buffer tank 3 is communicated with the horizontal pipe 212, and the bottom of the buffer tank 3 is communicated with the liquid inlet of the water ring vacuum pump through the liquid pipe 4.

[0033] The buffer tank 3 stores a certain amount of buffer liquid, which is generally clean water. The buffer liquid is transported into the water ring vacuum pump through the liquid pipe 4, and plays a sealing role. When the water ring vacuum pump is working, the buffer liquid will flow back into the buffer tank 3 along with the gas discharged from the air outlet. In this process, the soluble and condensable substances in the exhaust gas will dissolve in the buffer liquid, and only the non-soluble and non-condensable substances will enter the high-temperature treatment device 2 for high-temperature deodorization treatment.

[0034] In some embodiments, the present high-temperature deodorization equipment further comprises a plate heat exchanger 5 arranged on the liquid pipe 4 for cooling the buffer liquid in the liquid pipe 4. The buffer liquid also plays a role of cooling and reducing the temperature of the water ring vacuum pump when it is working. The plate heat exchanger 5 is used to cool the buffer liquid, so that the temperature of the buffer liquid flowing into the water ring vacuum pump does not exceed the upper limit, so as to maintain the stable water ring thickness and temperature in the water ring vacuum pump.

[0035] Since the soluble and condensable substances in the exhaust gas will dissolve in the buffer liquid, the volume of the buffer liquid will gradually increase. Therefore, in some embodiments, the present high-temperature deodorization equipment further comprises a liquid extraction pump 6, a liquid level sensor 7 and a second PLC controller 8. The inlet of the liquid extraction pump 6 is communicated with the liquid pipe 4 or the buffer tank 3, and the liquid level sensor 7 is arranged on the buffer tank 3. The liquid level sensor 7 is in signal transmission connection with the second PLC controller 8, and the second PLC controller 8 is in signal control connection with the liquid extraction pump 6. The second PLC controller 8 can adopt the same PLC module as the first PLC controller 28.

[0036] The liquid level sensor 7 is used to monitor the liquid level in the buffer tank 3. The second PLC controller 8 is preset with upper and lower limit values of the liquid level. When the liquid level data detected by the liquid level sensor 7 reaches the upper limit value, the second PLC controller 8 controls the liquid extraction pump 6 to start, and the buffer liquid is extracted from the buffer tank 3, so that the liquid level in the buffer tank 3 is lowered. When the liquid level detected by the liquid level sensor 7 drops to the lower limit value, the second PLC controller 8 controls the liquid extraction pump 6 to stop. In this way, the amount of buffer liquid in the buffer tank 3 is kept within a certain range, so that the water ring vacuum pump can work normally, and the buffer liquid is prevented from flowing back to the water ring vacuum pump due to excessive amount.

[0037] In order to better understand the present application, the following will be combined with Figure 1 The technical scheme of the present application is described in detail as follows: The water ring vacuum pump 1 draws the waste gas generated during the treatment of waste oil into the buffer tank 3, and the soluble and condensable substances in the waste gas are dissolved in the buffer liquid, and the non-soluble and non-condensable substances enter the high-temperature treatment device 2. When passing through the heater 23, the odor substances are carbonized at high temperature, and become carbon residues falling to the bottom of the vertical pipe 211, and the odorless gas after high-temperature carbonization treatment is discharged from the top of the vertical pipe 211. The carbon residues at the bottom of the vertical pipe 211 are discharged through the residue discharge valve 24.

[0038] The specific embodiments of the present application described above do not constitute a limitation on the protection scope of the present application. Any various other corresponding changes and modifications made according to the technical concept of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A high-temperature deodorization device for waste oil treatment waste gas, characterized in that: include: An air extraction device, wherein the air inlet of the air extraction device is connected to a waste grease processing device; A high-temperature treatment device includes a treatment pipeline, a flame arrester and a heater. The air inlet end of the treatment pipeline is connected to the air outlet of the exhaust device. The flame arrester and the heater are arranged in sequence in the treatment pipeline along the gas flow direction.

2. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 1, characterized in that: The processing pipeline is L-shaped and includes a vertical pipe and a horizontal pipe that are interconnected. The horizontal pipe is connected to the air outlet of the air extraction device. The flame arrester is arranged in the horizontal pipe, and the heater is arranged in the vertical pipe.

3. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 2, characterized in that: The vertical pipe is arranged vertically, the horizontal pipe is arranged horizontally, the lower end of the vertical pipe is connected to the horizontal pipe, and the high-temperature treatment device further includes a slag discharge valve, which is arranged at the bottom of the vertical pipe.

4. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 3, characterized in that: The high-temperature treatment device further includes a sight glass, which is arranged at the connection between the horizontal pipe and the vertical pipe.

5. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 2, characterized in that: The high-temperature treatment device further includes a heat-insulating layer, which is coated on the outside of the vertical pipe where the heater is located.

6. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 2, characterized in that: The heater is a tubular structure and is built into the vertical pipe. The outer wall of the heater is fixedly connected to the inner wall of the vertical pipe, and a high-temperature deodorization cavity is formed in the heater.

7. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 6, characterized in that: The high-temperature treatment device also includes a temperature sensor and a first PLC controller. The temperature sensor is arranged in the high-temperature deodorization chamber. The temperature sensor is connected to the first PLC controller for signal transmission, and the first PLC controller is connected to the heater for signal control.

8. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 2, characterized in that: It also includes a buffer tank, the air extraction device is a water ring vacuum pump, the air outlet of the water ring vacuum pump is connected to the buffer tank, the top of the buffer tank is connected to the horizontal pipe, and the bottom of the buffer tank is connected to the liquid inlet of the water ring vacuum pump through a liquid pipe.

9. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 8, characterized in that: It also includes a plate heat exchanger, which is arranged on the liquid pipe and is used to cool the liquid in the liquid pipe.

10. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 8, characterized in that: It also includes a liquid production pump, a liquid level sensor and a second PLC controller. The inlet of the liquid production pump is connected to the liquid pipe. The liquid level sensor is arranged on the buffer tank. The liquid level sensor is connected to the second PLC controller for signal transmission. The second PLC controller is connected to the liquid production pump for signal control.

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