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

Abstract

The invention 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 the air inlet of the air extractor is communicated with waste grease treatment equipment; 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 invention 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 and carbonized, so that the aim of deodorization is fulfilled.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a high-temperature deodorizing device for treating waste gas from waste grease. Background Art

[0002] Crude biodiesel from waste oil is a mixture of complex organic components with extremely high oxygen content. These mixtures are mainly organic fatty acid esters with large molecular weight, and also carry oxygen-containing organic matter, such as esters, ethers, aldehydes, ketones, phenols, organic acids, alcohols, etc. When waste oil raw materials are collected, stored and transported, cadaverine substances produced by protein corruption, low molecular fatty acid esters, fatty acids, fatty aldehydes, fatty ketones and other substances produced by oil hydrolysis, oxidation and rancidity are also carried in. During its production process, high-temperature cracking will produce some low-carbon aldehydes and ketones and other odor gases, plus some residual methanol that has not been completely removed, which also has a pungent odor. Most of the odor entering the vacuum pump is condensed and absorbed by the water ring, but a part of the odor is discharged in the form of non-condensable gas. If it is not treated, it will cause air pollution and the working environment will also have an unpleasant odor.

[0003] At present, in the production of biodiesel, the odor at the outlet of the water ring vacuum pump during the operation of the vacuum unit is very strong, which can easily cause odor pollution, especially when acrolein is present. When the concentration reaches 1PPm in 1m³ of air, people will shed tears, which not only affects human health, but also causes varying degrees of pollution to the surrounding environment.

[0004] In the prior art, alkaline washing, deodorizing spraying, ultraviolet oxidation and other methods are usually used to treat the gas, but the treatment effect is not significant and the odor is difficult to eliminate completely. In the actual use of the above methods, it is found that they lack pertinence and have serious defects, such as equipment expansion, high production and operation costs, and low efficiency. Therefore, they must be improved. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a high-temperature deodorization device for waste oil treatment waste gas to solve the technical problem that the deodorization effect of the malodorous waste gas generated by waste oil treatment in the prior art is not ideal.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a high-temperature deodorization device for treating waste gas from waste grease, comprising: an exhaust device, the air inlet of the exhaust device is connected to the waste grease treatment device; a high-temperature treatment device, the high-temperature treatment device comprises 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, and the flame arrester and the heater are sequentially arranged in the treatment pipeline along the gas flow direction.

[0007] In some embodiments, the processing pipeline is L-shaped, which includes a vertical pipe and a horizontal pipe that are interconnected. The horizontal pipe is connected to the air outlet of the exhaust device, the flame arrester is arranged in the horizontal pipe, and the heater is arranged in the vertical pipe.

[0008] In some embodiments, 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 also includes a slag discharge valve, which is arranged at the bottom of the vertical pipe.

[0009] In some embodiments, the high temperature processing device further includes a sight glass, which is disposed at the connection between the horizontal tube and the vertical tube.

[0010] In some embodiments, the high temperature processing device further comprises a heat-insulating layer, which is coated on the outside of the vertical pipe where the heater is located.

[0011] In some embodiments, the heater is a tubular structure and is built into a vertical pipe, the outer wall of the heater is fixedly connected to the inner wall of the vertical pipe, and a high-temperature deodorization chamber is formed in the heater.

[0012] In some embodiments, the high temperature processing device also includes a temperature sensor and a first PLC processor. The temperature sensor is arranged in the high temperature deodorization chamber. The temperature sensor is connected to the first PLC controller for signal transmission. The first PLC controller is connected to the heater for signal control.

[0013] In some embodiments, a buffer tank is also included, and 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 cross pipe, and the bottom of the buffer tank is connected to the liquid inlet of the water ring vacuum pump through a liquid pipe.

[0014] In some embodiments, a plate heat exchanger is also included, and the plate heat exchanger is arranged on the liquid pipe to cool the liquid in the liquid pipe.

[0015] In some embodiments, 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.

[0016] Compared with the prior art, the high-temperature deodorization equipment for waste oil treatment waste gas provided by the present invention utilizes a heater to generate a high-temperature environment, and when low-molecular odorous substances pass through, the odorous substances are heated and carbonized, thereby achieving the purpose of deodorization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a high-temperature deodorization device for treating waste gas from waste grease provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem of unsatisfactory deodorization effect of malodorous waste gas generated by waste grease treatment, the present invention provides a high-temperature deodorization equipment for waste grease treatment waste gas, which carbonizes malodorous substances through high temperature to achieve simple and efficient deodorization of malodorous waste gas.

[0020] It should be noted that the high-temperature deodorization equipment for waste oil treatment waste gas described in the present invention is used for but not limited to waste gas generated during waste oil treatment, etc. For the convenience of explanation, in the present invention, only the deodorization of waste gas generated during waste oil treatment by the high-temperature deodorization equipment for waste oil treatment is described as an example. The principle of applying the high-temperature deodorization equipment for waste oil treatment waste gas to other waste gases is essentially the same as the principle applied to the deodorization of waste gas generated during waste oil treatment, and will not be elaborated here.

[0021] See also Figure 1 , Figure 1 It is a schematic structural diagram of a high-temperature deodorization device for treating waste oil and grease waste gas in one embodiment of the present invention, comprising an exhaust device 1 and a high-temperature treatment device 2.

[0022] The air inlet of the air extraction device 1 is connected to the waste grease treatment equipment, and the air outlet is connected to the high temperature treatment device 2. The air extraction device 1 is used to extract the waste gas generated by the waste grease treatment equipment 1 into the high temperature treatment device 2 for deodorization treatment, and then discharge it after removing the malodorous substances.

[0023] The high-temperature treatment device 2 includes a treatment pipeline 21, a flame arrester 22 and a heater 23. The air inlet end of the treatment pipeline 21 is connected to the air outlet of the exhaust device 1. Along the gas flow direction, the flame arrester 22 and the heater 23 are sequentially arranged in the treatment pipeline 21. The heater 23 can generate a high-temperature environment, and when the gas passes through, the malodorous substances are carbonized at high temperature, thereby being removed. Since malodorous substances are generally flammable organic matter, they are prone to combustion in a high-temperature environment. The flame arrester 22 can prevent the flame from spreading along the treatment pipeline 21, causing damage to the exhaust device 1 or even the waste grease treatment equipment.

[0024] In some embodiments, the processing pipeline 21 is L-shaped, and includes a vertical pipe 211 and a horizontal pipe 212 that are connected to each other. The horizontal pipe 212 is connected to the air outlet of the air extraction device 1, the flame arrester 22 is arranged in the horizontal pipe 212, and the heater 23 is arranged in the vertical pipe 211.

[0025] In some embodiments, the heater 23 is a tubular structure and is built into the vertical pipe 211. The outer wall of the heater 23 is fixedly connected to the inner wall of the vertical pipe 211, and a high-temperature deodorization chamber is formed in the heater 23. When the gas passes through the middle of the heater 23, the malodorous substances are heated and carbonized. The heater 23 is generally an electric heater, which can be formed by winding an electric heating wire into a tubular shape.

[0026] In this embodiment, the vertical pipe 211 is arranged vertically, the horizontal pipe 212 is arranged horizontally, and the lower end of the vertical pipe 211 is connected to the horizontal pipe 212. The high temperature treatment device 2 also includes a slag discharge valve 24, which is arranged at the bottom of the vertical pipe 211. After the odorous substances are heated and carbonized by the heater 23, they will fall and accumulate at the bottom of the vertical pipe 211, and the carbon residues can be discharged by opening the slag discharge valve 24.

[0027] In some embodiments, the high temperature treatment device 2 further includes a sight glass 25, which is disposed at the connection between the horizontal pipe 212 and the vertical pipe 211. Through the sight glass 25, the operator can observe the accumulation of carbon slag at the bottom of the vertical pipe 211, and thus promptly open the slag discharge valve 24 for slag discharge. It is easy for those skilled in the art to understand that, due to the high temperature of the carbon slag, the sight glass 25 needs to have a high temperature resistance property, so as to avoid the carbon slag from scalding the sight glass 25.

[0028] In some embodiments, the high temperature treatment device 2 further includes a heat preservation layer 26, which is coated on the outside of the vertical pipe 211 where the heater 23 is located. The heat preservation layer 26 is preferably longer than the heater 23, and extends a certain distance at the upper and lower ends to obtain a better heat preservation effect. In this embodiment, the upper and lower ends of the heat preservation layer 26 extend 30 cm compared to the upper and lower ends of the heater 23.

[0029] In some embodiments, the high temperature treatment device 2 also includes a temperature sensor 27 and a first PLC processor 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 as to maintain the temperature in the heating chamber within the required range. This temperature can not only fully remove malodorous 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.

[0030] In this embodiment, the upper temperature limit of the high temperature deodorization chamber is 510°C, and the lower temperature limit is 500°C. When the temperature sensor 27 detects that the temperature of the high temperature deodorization chamber reaches the upper temperature limit of 510°C, the first PLC controller 28 controls the heater 23 to turn off or reduce the output power, so that the temperature of the high temperature deodorization chamber drops. When the temperature sensor 27 detects that the temperature of the high temperature deodorization chamber reaches the lower temperature limit of 500°C, the first PLC controller 28 controls the heater 23 to start or increase the output power, so that the temperature of the high temperature deodorization chamber rises. In this way, the temperature of the high temperature deodorization chamber is kept within the specified range.

[0031] In some embodiments, the air extraction device 1 uses a water ring vacuum pump. The high-temperature deodorization equipment also includes a buffer tank 3, the air outlet of the water ring vacuum pump 1 is connected to the buffer tank 3, the top of the buffer tank 3 is connected to the horizontal pipe 212, and the bottom of the buffer tank 3 is connected to the liquid inlet of the water ring vacuum pump through the liquid pipe 4.

[0032] A certain amount of buffer solution, generally water, is stored in the buffer tank 3. The buffer solution is transported to the water ring vacuum pump through the liquid pipe 4 to play a sealing role. When the water ring vacuum pump is working, the buffer solution will be discharged from the gas outlet along with the gas and flow back to the buffer tank 3. In this process, the soluble and condensable substances in the exhaust gas will dissolve in the buffer solution, and only the insoluble and non-condensable substances will enter the high temperature treatment device 2 for high temperature deodorization treatment.

[0033] In some embodiments, the high temperature deodorization equipment further comprises a plate heat exchanger 5, which is arranged on the liquid pipe 4 and used to cool the buffer solution in the liquid pipe 4. The buffer solution also serves to cool the water ring vacuum pump when it is working. The plate heat exchanger 5 is used to cool the buffer solution so that the temperature of the buffer solution flowing into the water ring vacuum pump does not exceed the upper limit, so as to maintain a stable water ring thickness and temperature in the water ring vacuum pump.

[0034] Since the soluble substances and condensable substances in the exhaust gas will dissolve in the buffer solution, the volume of the buffer solution will gradually increase. Therefore, in some embodiments, the high-temperature deodorization equipment also includes 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 connected to 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 connected to the second PLC controller 8 for signal transmission, and the second PLC controller 8 is connected to the liquid extraction pump 6 for signal control. The second PLC controller 8 can use the same PLC module as the first PLC controller 28.

[0035] The liquid level sensor 7 is used to monitor the liquid level height in the buffer tank 3. The second PLC controller 8 is pre-set with an upper limit value and a lower limit value 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, extract the buffer solution from the buffer tank 3, and reduce the buffer solution level in the buffer tank 3. When the liquid level sensor 7 detects that the liquid level has dropped 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 solution in the buffer tank 3 is kept within a certain range, so that it can maintain the normal operation of the water ring vacuum pump and avoid excessive buffer solution from flowing back into the water ring vacuum pump.

[0036] In order to better understand the present invention, the following Figure 1 The technical solution of the present invention is described in detail: the water ring vacuum pump 1 draws the waste gas generated during the waste oil treatment into the buffer tank 3, the soluble substances and condensable substances in the waste gas are dissolved in the buffer solution, and the insoluble substances and non-condensable substances enter the high temperature treatment device 2. When passing through the heater 23, the odorous substances will be carbonized at high temperature, and become carbon slag that falls to the bottom of the vertical pipe 211. The odorless gas after high temperature carbonization treatment is discharged from the top of the vertical pipe 211. The carbon slag at the bottom of the vertical pipe 211 is discharged through the slag discharge valve 24.

[0037] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

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 treatment device; A high temperature treatment device, comprising a treatment pipeline, a flame arrester and a heater, wherein the air inlet end of the treatment pipeline is connected to the air outlet of the exhaust device, and the flame arrester and the heater are sequentially arranged 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 with the horizontal pipe, and the high temperature treatment device further comprises a slag discharge valve, and the slag discharge valve 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 comprises a sight glass, which is arranged at the connection between the horizontal tube and the vertical tube.

5. The high-temperature deodorization equipment for waste oil treatment waste gas according to claim 2, characterized in that: The high temperature treatment device also 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 in 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 chamber 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 processor. The temperature sensor is arranged in the high temperature deodorization chamber. The temperature sensor is connected to the first PLC controller for signal transmission. 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 cross 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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