Pyrolysis gas recovery device for low-temperature pyrolysis of medical wastes

Abstract

The invention belongs to the technical field of medical waste treatment, and particularly relates to a medical waste low-temperature pyrolysis gas recovery device which comprises a condensing tower and a water seal tank, the condensing tower comprises a condensing tower shell, and two inner sealing plates are arranged in the condensing tower shell; two inner sealing plates are arranged in the condensing tower shell and divide an inner cavity of the condensing tower shell into an outlet cavity, a condensing cavity and an inlet cavity, a plurality of condensing capillary tubes are fixed between the two inner sealing plates, the upper ends and the lower ends of the condensing capillary tubes communicate with the outlet cavity and the inlet cavity correspondingly, and a first pyrolysis gas outlet and a first pyrolysis gas inlet are formed in the upper end and the lower end of the condensing tower shell. The water seal tank is provided with a second pyrolysis gas inlet and a second pyrolysis gas outlet, and the second pyrolysis gas inlet is connected with the first pyrolysis gas outlet of the condensing tower through a gas pipeline. According to the invention, pyrolysis gas can be rapidly and effectively recovered, so that the medical waste low-temperature pyrolysis technology can be subjected to engineering application while reducing, disinfecting and resource recycling of medical wastes are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of medical waste treatment, and in particular relates to a pyrolysis gas recovery device for low-temperature pyrolysis of medical waste. Background Art

[0002] Because medical waste has a high organic content and high calorific value, in addition to reduction and disinfection, resource recovery has become a popular goal in medical waste treatment technology. Low-temperature pyrolysis technology for medical waste can achieve medical waste reduction, disinfection, and resource recycling, but this technology has not yet been applied in engineering. Medical waste will form pyrolysis gas and pyrolysis residue during the low-temperature pyrolysis process, and the recovery and reuse of pyrolysis gas is a key part of it.

[0003] Therefore, there is an urgent need for a pyrolysis gas recovery device for low-temperature pyrolysis of medical waste to achieve the recovery of pyrolysis gas resources. Summary of the invention

[0004] In view of the above-mentioned defects in the prior art, the present invention provides a pyrolysis gas recovery device for low-temperature pyrolysis of medical waste, comprising a condensation tower and a water seal tank, the condensation tower comprising a condensation tower shell, the upper and lower ends of the interior of the condensation tower shell are respectively provided with an upper inner sealing plate and a lower inner sealing plate, and the two inner sealing plates divide the inner cavity of the condensation tower shell from top to bottom into an outlet chamber, a condensation chamber and an inlet chamber, a plurality of condensation capillaries are fixedly connected between the two inner sealing plates, and the upper and lower ends of the plurality of condensation capillaries are respectively connected with the outlet chamber and the inlet chamber, the condensation capillaries are used for transporting pyrolysis gas for condensation, and the plurality of condensation capillaries are parallel to each other and arranged at intervals to ensure uniform heat exchange; a first pyrolysis gas outlet and a first pyrolysis gas inlet are respectively provided at the top and bottom of the condensation tower shell, and the first pyrolysis gas outlet is connected with the outlet chamber, and the first pyrolysis gas inlet is connected with the inlet chamber.

[0005] The water seal tank is provided with a second pyrolysis gas inlet and a second pyrolysis gas outlet, and the second pyrolysis gas inlet is connected to the first pyrolysis gas outlet of the condensation tower through a gas pipeline, one end of the gas pipeline extends to the bottom of the water seal tank, and the second pyrolysis gas outlet is connected to the combustion system, which can effectively prevent the flame backflow of the combustion system.

[0006] Optionally, the condensation tower shell includes an outer wall of the condensation tower and two condensation funnels arranged at the upper and lower ends of the outer wall of the condensation tower, and the two condensation funnels are symmetrically arranged up and down, and a grease collection port is provided at the bottom of the condensation funnel located at the lower end of the outer wall of the condensation tower.

[0007] Specifically, the condensation tower has a structure with two conical ends and a cylindrical middle.

[0008] Optionally, a fixing frame is fixed to the outside of the condensation tower shell.

[0009] Optionally, a condensate outlet is provided on the upper part of the outer wall of the condensation tower, and the condensate outlet is located below the upper inner sealing plate. A condensate inlet is provided on the lower part of the outer wall of the condensation tower, and the condensate inlet is located above the lower inner sealing plate. Both the condensate outlet and the condensate inlet are connected to the condensation chamber of the condensation tower.

[0010] Optionally, the first pyrolysis gas outlet of the condensation tower is located above the upper inner sealing plate, and the first pyrolysis gas inlet is located below the lower inner sealing plate.

[0011] Specifically, the first pyrolysis gas inlet and the condensation water inlet, and the first pyrolysis gas outlet and the condensation water outlet are separated by two inner sealing plates respectively, which can prevent the pyrolysis gas from contacting the condensation water and mixing with water vapor; at the same time, the first pyrolysis gas inlet and the condensation water inlet are both arranged at the lower part of the condensation tower, so that the pyrolysis gas can be fully condensed.

[0012] Optionally, the water seal groove is also provided with a water injection port.

[0013] Specifically, water can be injected into the water seal groove in advance through the water injection port.

[0014] Optionally, a stop valve is provided on the gas pipeline.

[0015] The present invention also includes other components that enable a pyrolysis gas recovery device for low-temperature pyrolysis of medical waste to function normally, all of which are conventional technical means in the art. In addition, the devices or components not limited in the present invention all adopt conventional technical means in the art.

[0016] The working principle of the present invention is that medical waste forms pyrolysis gas and pyrolysis residue through the pyrolysis system, and the pyrolysis gas enters the condensation tower through the first pyrolysis gas inlet and then enters the condensation capillary. At this time, condensation water is introduced into the condensation water inlet, and the condensation chamber is filled with condensation water to condense the pyrolysis gas in the condensation capillary. Most of the condensed pyrolysis gas becomes liquid oil and flows into the condensation funnel at the bottom to be recycled. A small amount of non-condensable pyrolysis gas is discharged from the condensation tower from the first pyrolysis gas outlet and enters the water seal tank through the gas pipeline. Then, it is discharged from the water seal tank from the second pyrolysis gas outlet and enters the combustion system, and further combustion provides heat for the later pyrolysis of medical waste.

[0017] The beneficial effects of the present invention are:

[0018] (1) The entire device has a simple structure and is easy to operate. It can quickly and effectively recycle pyrolysis gas, so that the low-temperature pyrolysis technology of medical waste can be applied in engineering while achieving the reduction, disinfection, and resource recycling of medical waste.

[0019] (2) The condensation tower can not only condense, recycle and reuse the pyrolysis gas, but also send a small amount of non-condensable pyrolysis gas to the combustion system through the water seal tank to provide heat for the later pyrolysis of medical waste. The water seal tank can also effectively prevent the flame backflow of the combustion system, thereby improving the safety and stability of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 for Figure 1 Left view of .

[0023] Figure 3 It is a structural schematic diagram of a condensation tower of the present invention.

[0024] Figure 4 for Figure 3 Cross-sectional view along the BB axis.

[0025] In the figure: 1. condensation tower, 2. water seal groove, 3. gas pipeline, 4. fixing frame, 10. condensation funnel, 11. outer wall of condensation tower, 12. condensation capillary, 13. condensation water inlet, 14. condensation water outlet, 15. upper inner sealing plate, 16. first pyrolysis gas inlet, 17. first pyrolysis gas outlet, 18. grease collection port, 19. lower inner sealing plate, 21. second pyrolysis gas inlet, 22. second pyrolysis gas outlet, 23. water injection port. DETAILED DESCRIPTION

[0026] The present invention is described clearly below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description herein is only used to explain the present invention, but is not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent substitutions, improvements, etc., should be included in the protection scope of the present invention.

[0027] Example

[0028] like Figure 1-4As shown, an embodiment of the present invention provides a pyrolysis gas recovery device for low-temperature pyrolysis of medical waste, including a condensation tower 1 and a water seal tank 2. The condensation tower 1 includes a condensation tower shell, a fixing frame 4 is fixed to the outside of the condensation tower shell, an upper inner sealing plate 15 and a lower inner sealing plate 19 are respectively arranged at the upper and lower ends of the interior of the condensation tower shell, and the two inner sealing plates divide the inner cavity of the condensation tower shell from top to bottom into an outlet chamber, a condensation chamber and an inlet chamber, a plurality of condensation capillaries 12 are fixedly connected between the two inner sealing plates, and the upper and lower ends of the plurality of condensation capillaries 12 are respectively connected to the outlet chamber and the inlet chamber, the condensation capillaries 12 are used to transport pyrolysis gas for condensation, and the plurality of condensation capillaries 12 are parallel to each other and arranged at intervals to ensure uniform heat exchange; a first pyrolysis gas outlet 17 and a first pyrolysis gas inlet 16 are respectively arranged at the top and bottom of the condensation tower shell, and the first pyrolysis gas outlet 17 is connected to the outlet chamber, and the first pyrolysis gas inlet 16 is connected to the inlet chamber. The first pyrolysis gas outlet 17 of the condensation tower 1 is located above the upper inner sealing plate 15 , and the first pyrolysis gas inlet 16 is located below the lower inner sealing plate 19 .

[0029] The condensation tower shell includes a condensation tower outer wall 11 and two condensation funnels 5 arranged at the upper and lower ends of the condensation tower outer wall 11, and the two condensation funnels 5 are symmetrically arranged up and down. A grease collection port 18 is provided at the bottom of the condensation funnel 5 located at the lower end of the condensation tower outer wall 11. The condensation tower 1 as a whole has a conical structure at both ends and a cylindrical structure in the middle.

[0030] In addition, a condensate outlet 14 is provided on the upper portion of the outer wall 11 of the condensation tower, and the condensate outlet 14 is located below the upper inner sealing plate 15. A condensate inlet 13 is provided on the lower portion of the outer wall 11 of the condensation tower, and the condensate inlet 13 is located above the lower inner sealing plate 19. The condensate outlet 14 and the condensate inlet 13 are both connected to the condensation chamber of the condensation tower 1.

[0031] It can be understood that the first pyrolysis gas inlet 16 and the condensed water inlet 13, and the first pyrolysis gas outlet 17 and the condensed water outlet 14 are separated by two inner sealing plates respectively, which can prevent the pyrolysis gas from contacting with the condensed water and mixing with water vapor; at the same time, the first pyrolysis gas inlet 16 and the condensed water inlet 13 are both arranged at the lower part of the condensation tower 1, so that the pyrolysis gas can be fully condensed.

[0032] The water seal tank 2 is provided with a second pyrolysis gas inlet 21, a second pyrolysis gas outlet 22 and a water injection port 23, and the second pyrolysis gas inlet 21 is connected to the first pyrolysis gas outlet 17 of the condensation tower 1 through a gas pipeline 3, and a stop valve is provided on the gas pipeline 3. One end of the gas pipeline 3 extends to the bottom of the water seal tank 2. The second pyrolysis gas outlet 22 is connected to the combustion system, and water can be injected into the water seal tank 2 in advance through the water injection port 23, which can effectively prevent the flame backflow of the combustion system.

[0033] The working principle of the present invention is that medical waste forms pyrolysis gas and pyrolysis residue through the pyrolysis system. The pyrolysis gas enters the condensation tower 1 through the first pyrolysis gas inlet 16, and then enters the condensation capillary 12. At this time, condensation water is introduced into the condensation water inlet 13, and the condensation chamber is filled with condensation water to condense the pyrolysis gas in the condensation capillary 12. Most of the condensed pyrolysis gas becomes liquid oil and flows into the condensation funnel 5 at the bottom to be recycled. A small amount of non-condensable pyrolysis gas is discharged from the condensation tower 1 from the first pyrolysis gas outlet 17, enters the water seal tank 2 through the gas pipeline 3, and then is discharged from the water seal tank 2 from the second pyrolysis gas outlet 22 and enters the combustion system, and is further burned to provide heat for the later pyrolysis of medical waste.

[0034] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A pyrolysis gas recovery device for low-temperature pyrolysis of medical waste, comprising a condensation tower and a water seal tank, characterized in that: The condensation tower includes a condensation tower shell, wherein an upper inner sealing plate and a lower inner sealing plate are respectively arranged at the upper and lower ends of the interior of the condensation tower shell, and the two inner sealing plates divide the inner cavity of the condensation tower shell from top to bottom into an outlet cavity, a condensation cavity and an inlet cavity, a plurality of condensation capillaries are fixedly connected between the two inner sealing plates, and the upper and lower ends of the plurality of condensation capillaries are respectively connected with the outlet cavity and the inlet cavity, a first pyrolysis gas outlet and a first pyrolysis gas inlet are respectively arranged at the top and the bottom of the condensation tower shell, and the first pyrolysis gas outlet is connected with the outlet cavity, and the first pyrolysis gas inlet is connected with the inlet cavity; The water seal tank is provided with a second pyrolysis gas inlet and a second pyrolysis gas outlet, and the second pyrolysis gas inlet is connected to the first pyrolysis gas outlet of the condensation tower through a gas pipeline.

2. The pyrolysis gas recovery device for low-temperature pyrolysis of medical waste according to claim 1, characterized in that: The condensation tower shell includes an outer wall of the condensation tower and two condensation funnels arranged at the upper and lower ends of the outer wall of the condensation tower, and the two condensation funnels are symmetrically arranged up and down, and a grease collection port is arranged at the bottom of the condensation funnel located at the lower end of the outer wall of the condensation tower.

3. The pyrolysis gas recovery device for low-temperature pyrolysis of medical waste according to claim 2, characterized in that: A fixing frame is fixed on the outside of the condensation tower shell.

4. The pyrolysis gas recovery device for low-temperature pyrolysis of medical waste according to claim 3, characterized in that: A condensate outlet is provided at the upper part of the outer wall of the condensation tower, and the condensate outlet is located below the upper inner sealing plate. A condensate inlet is provided at the lower part of the outer wall of the condensation tower, and the condensate inlet is located above the lower inner sealing plate. Both the condensate outlet and the condensate inlet are connected to the condensation chamber of the condensation tower.

5. The pyrolysis gas recovery device for low-temperature pyrolysis of medical waste according to claim 4, characterized in that: The first pyrolysis gas outlet of the condensation tower is located above the upper inner sealing plate, and the first pyrolysis gas inlet is located below the lower inner sealing plate.

6. The pyrolysis gas recovery device for low-temperature pyrolysis of medical waste according to claim 5, characterized in that: The water seal groove is also provided with a water injection port.

7. The pyrolysis gas recovery device for low-temperature pyrolysis of medical waste according to claim 6, characterized in that: A stop valve is provided on the gas pipeline.

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