Waste gas pretreatment combustion device

Abstract

The utility model discloses a waste gas pretreatment combustion device which comprises a gas inlet pipe and a washing tower, a first branch pipe is arranged on the gas inlet pipe, a thermocouple is arranged in the gas inlet pipe, the gas inlet pipe is communicated with the washing tower, a fan is further arranged on the gas inlet pipe, a pretreatment mechanism is arranged between the fan and the first branch pipe, and an ash removal assembly is arranged in the washing tower. A gas outlet pipe at the top end of the washing tower is connected with a U-shaped pipe, a drying assembly is arranged on the U-shaped pipe, and a waste gas combustion mechanism is arranged at the bottom end of the U-shaped pipe. According to the utility model, a small amount of granular impurities can be conveniently removed before waste gas is combusted, so that the subsequent waste gas combustion effect can be ensured, the condition of combustion crystallization is avoided, meanwhile, cleaning operation can be periodically carried out, blockage is avoided, the normal operation of the device is ensured, and the combustion treatment effect on the waste gas is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust gas front-end combustion treatment, in particular to an exhaust gas pre-treatment combustion device. Background Art

[0002] Air pollution is one of the most prominent environmental problems in my country. Among them, industrial waste gas is an important source of air pollutants. The most difficult to treat among industrial waste gases is organic waste gas, which mainly includes various hydrocarbons, alcohols, aldehydes, acids, ketones and amines. Therefore, the waste gas needs to be treated before it is discharged, and the waste gas can be treated by combustion treatment.

[0003] However, the existing waste gas treatment devices cannot treat organic waste gas well. The waste gas is directly put into the heat storage furnace without being treated, which is prone to incomplete combustion and the generation of harmful substances. It is also difficult to remove them during the flue gas treatment process. In addition, most organic waste gas contains small solid particles, which will crystallize on the wall of the incinerator and the bottom of the heat storage body during the combustion process, causing blockage. Long-term operation will cause local high temperature and fire hazards. The practical effect is not ideal and does not meet actual use needs. Utility Model Content

[0004] The purpose of the utility model is to provide a waste gas pre-treatment combustion device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste gas pretreatment combustion device, including an air intake pipe and a washing tower, a first branch pipe is provided on the air intake pipe, and a thermocouple is provided inside the air intake pipe, the air intake pipe is connected to the washing tower, a fan is also provided on the air intake pipe, a pretreatment mechanism is provided between the fan and the first branch pipe, an ash removal component is provided inside the washing tower, a U-shaped tube is connected to the air outlet pipe at the top of the washing tower, a drying component is provided on the U-shaped tube, and a waste gas combustion mechanism is provided at the bottom of the U-shaped tube.

[0006] Preferably, in order to facilitate filtering and adsorbing particulate impurities in the exhaust gas and facilitate subsequent combustion treatment, the pretreatment mechanism includes a filter screen arranged inside the intake pipe, the top and bottom ends of the filter screen are connected to the inner wall of the intake pipe through elastic connecting belts, and a cleaning plate is equidistantly provided at one end of the filter screen close to the first branch pipe, and the top end of the intake pipe is connected to the filter screen through a driving assembly.

[0007] Preferably, in order to facilitate the up and down movement of the filter net and to facilitate the cleaning operation of the adsorbed impurities, the driving assembly includes a cleaning motor arranged on the air intake pipe, a crankshaft is fixedly provided at the output end of the cleaning motor, and a connecting column is provided through a rotating part on the crankshaft, and the connecting column slides through the air intake pipe and is fixedly connected to the filter net.

[0008] Preferably, in order to facilitate the re-removal of particulate impurities and ensure sufficient water washing, the dust removal component includes a stirring motor arranged at the bottom of the washing tower, and the output end of the stirring motor passes through the washing tower and extends to the interior where stirring blades are equidistantly arranged.

[0009] Preferably, in order to facilitate the re-removal of particulate impurities, the dust removal component also includes a spray pipe arranged inside the washing tower above the stirring blades, nozzles are equidistantly arranged under the spray pipe, and a drain outlet is also provided at the bottom of the washing tower.

[0010] Preferably, in order to dry and preheat the exhaust gas and facilitate subsequent combustion purification, the drying component includes a dehydration packing layer arranged inside the washing tower above the spray pipe, and a demisting mesh is provided at the top of the U-shaped tube, and a heater is provided at one end of the U-shaped tube close to the exhaust gas combustion mechanism.

[0011] Preferably, in order to carry out combustion and purification treatment of the exhaust gas, the exhaust gas combustion mechanism includes a combustion chamber connected to a U-shaped tube, a burner is provided inside the combustion chamber, an air outlet is provided at one end of the combustion chamber away from the washing tower, and a second branch pipe matching the combustion chamber is also provided on the U-shaped tube.

[0012] Preferably, in order to facilitate regular maintenance operations, inspection ports are provided on the scrubbing tower and the combustion chamber.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) The pre-treatment mechanism can be used to remove a small amount of particulate impurities before the exhaust gas is burned, thereby ensuring the effect of subsequent exhaust gas combustion and avoiding the occurrence of combustion crystallization. At the same time, regular cleaning operations can be performed to avoid blockage, ensure the normal operation of the device, and ensure the combustion treatment effect of the exhaust gas;

[0015] (2) The ash removal component is combined with the drying component to facilitate the removal of particulate impurities from the exhaust gas, ensuring thorough removal and subsequent thorough combustion. The exhaust gas after water washing can also be dried and preheated, which is convenient for subsequent ignition operations. From the exhaust gas inlet end, the working conditions of the organic gas are significantly improved, which makes the combustion more complete, less prone to crystallization and clogging. The equipment is safe to operate and easy to maintain, meeting actual use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an exhaust gas pretreatment combustion device proposed by the utility model;

[0017] Figure 2 This is a partial structural schematic diagram of a waste gas pretreatment combustion device proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of an air intake pipe in an exhaust gas pretreatment combustion device proposed by the utility model;

[0019] Figure 4 This is a structural schematic diagram of a pretreatment mechanism in a waste gas pretreatment combustion device proposed by the utility model;

[0020] Figure 5 This is a partial structural schematic diagram of a pretreatment mechanism in a waste gas pretreatment combustion device proposed by the utility model.

[0021] In the figure: 1. air inlet pipe; 2. washing tower; 3. first branch pipe; 4. fan; 5. thermocouple; 6. U-shaped pipe; 7. defog screen; 8. heater; 9. second branch pipe; 10. combustion chamber; 11. burner; 12. inspection port; 13. stirring motor; 14. stirring blade; 15. drain port; 16. spray pipe; 17. nozzle; 18. dehydration packing layer; 19. air outlet; 20. cleaning motor; 21. crankshaft; 22. rotating part; 23. filter screen; 24. elastic connecting belt; 25. cleaning plate; 26. connecting column. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5 The utility model provides an embodiment: an exhaust gas pretreatment combustion device, including an intake pipe 1 connected to and transporting the exhaust gas, a thermocouple 5 is installed inside the intake pipe 1 for conveniently checking the exhaust gas temperature, and then when the temperature is higher than a preset value, air is introduced through the first branch pipe 3 on the intake pipe 1, and a fresh air regulating valve is provided on the first branch pipe 3 for conveniently controlling its opening and closing, so that the exhaust gas in the intake pipe 1 can be cooled to a certain extent, and the exhaust gas concentration can be diluted so that the exhaust gas reaches the combustion standard, and a fan 4 is installed on the intake pipe 1 for conveniently transporting the exhaust gas to the washing tower 2, and the exhaust pipe at the top of the washing tower 2 is connected with a U-shaped pipe 6, which can conveniently pass the gas into the exhaust gas combustion mechanism and then discharge it, and the washing tower 2 and the combustion chamber 10 are both provided with inspection ports 12, which can facilitate regular maintenance operations.

[0024] See also Figure 1-Figure 5In order to ensure sufficient combustion and avoid fine particles affecting the combustion effect, and to facilitate cleaning operations after filtration to improve service life and filtering effect, a filter screen 23 of a pre-treatment mechanism is arranged inside the air intake pipe 1, and the top and bottom ends of the filter screen 23 are fixedly connected to the inner wall of the air intake pipe 1 through elastic connecting belts 24 (a spring can also be arranged according to actual conditions to facilitate up and down movement and reset, so as to facilitate vibration and ash shaking), and one end of the filter screen 23 is provided with multiple groups of cleaning plates 25 (composed of rectangular plates and bristles, the number can be three or four groups, etc., to ensure the cleaning effect while not affecting the transportation of exhaust gas), and in order to facilitate the regular up and down reciprocating movement of the filter screen 23 for shaking and removing dust, and to cooperate with the cleaning plate 25 for cleaning operations, the air intake pipe 1 A cleaning motor 20 with a driving assembly is installed at the top, and a crankshaft 21 is fixedly installed on the output end of the cleaning motor 20 through a coupling, and the crankshaft 21 is connected to a connecting column 26 through a rotating member 22 (composed of a collar, a connecting rod and a rotating block, which can be conveniently rotated by the crankshaft 21, and slide up and down on the intake pipe 1 with the connecting column 26. This is a relatively mature technology and will not be described in detail here). The connecting column 26 slides through the intake pipe 1 and is fixedly connected to the filter screen 23 by bolts. An empty slot is opened at the bottom end of the intake pipe 1, and a collecting device is provided under the empty slot, which may be composed of a collecting pipe, a collecting box, an exhaust fan and an electric control valve, etc. The electric control valve can be opened conveniently during cleaning, and dust and other impurities can be collected conveniently. It can be closed after cleaning without affecting the transportation of exhaust gas. This is a relatively mature technology and will not be described in detail here.

[0025] See also Figure 1-Figure 5In order to remove small particles in the exhaust gas again, a spray pipe 16 of a ash removal component is arranged inside the washing tower 2 (it is annular, and a water adding pipe is arranged at one end and connected to an external water pipe through a water pump), and nozzles 17 are installed equidistantly under the spray pipe 16 to ensure the spraying effect, and a drain port 15 is arranged on the side wall at the bottom end of the washing tower 2 to facilitate the discharge of the sprayed water. In order to better mix the exhaust gas and water for water washing, a stirring motor 13 is arranged at the bottom end of the washing tower 2. The output end of the stirring motor 13 passes through the washing tower 2 and extends to the inside, where stirring blades 14 are welded equidistantly, which can stir the exhaust gas in the tower, so that the exhaust gas can be washed more evenly by the sprayed water, wash away some small particles in the exhaust gas, and further cool the exhaust gas. In order to facilitate the subsequent combustion treatment, a dehydration filler layer 18 (the filler is polypropylene) of a drying component is installed at the top of the washing tower 2, which can be conveniently used. The exhaust gas is preliminarily dried, and then a defogger screen 7 is installed on the top of the U-shaped tube 6 for further drying. A heater 8 is also provided at one end of the U-shaped tube 6 close to the combustion chamber 10 (it can be heated by a resistance wire or other heating methods), which can facilitate preheating of the exhaust gas and facilitate subsequent combustion treatment. The bottom end of the U-shaped tube 6 is connected to the combustion chamber 10 of the exhaust gas combustion mechanism, and a burner 11 is installed inside the combustion chamber (using natural gas as fuel, which mainly includes an igniter, a gas inlet pipe, etc., which is a relatively mature technology and will not be described here). A second branch pipe 9 is also provided on the U-shaped tube 6, which can facilitate appropriate air replenishment in the combustion chamber 10 to allow the exhaust gas to be fully burned. A fresh air regulating valve is installed on the second branch pipe 9, which can be conveniently opened and closed, and an outlet 19 is installed at one end of the combustion chamber 10, which can facilitate the discharge after combustion.

[0026] Working principle: When the utility model is in use, the exhaust gas is introduced through the air inlet pipe 1, and the thermocouple 5 measures the temperature of the exhaust gas. If it is higher than the preset temperature, air is introduced through the first branch pipe 3 to cool the exhaust gas and dilute the exhaust gas concentration to meet the standard of subsequent combustion. The exhaust gas is then filtered through the filter screen 23 to filter particles. The exhaust gas is transported to the inside of the washing tower 2 under the action of the fan 4, and sprayed through the nozzle 17 under the spray pipe 16. At the same time, the stirring motor 13 works to rotate with the stirring blade 14, which can stir the exhaust gas in the tower, so that the exhaust gas can be more evenly washed by the sprayed water, and some small particles in the exhaust gas are washed away, and the exhaust gas is further cooled. Then, it is preliminarily dried through the dehydration filler layer 18, enters the U-shaped tube 6 through the top, and enters through the demisting screen 7 One-step drying, and then preheating the exhaust gas through the heater 8, which is convenient for subsequent ignition after entering the combustion chamber 10. When the exhaust gas is burned, air can be appropriately introduced through the second branch pipe 9 to ensure that the exhaust gas is burned thoroughly, and then discharged through the outlet 19. After using it for a period of time, the cleaning motor 20 works, driving the crankshaft 21 to rotate, and then cooperating with the rotating part 22 to drive the connecting column 26 to slide up and down on the intake pipe 1, and then cooperating with the elastic connecting belt 24 to drive the filter 23 to shake back and forth up and down, which can facilitate the shaking off of the impurities adsorbed by the filter 23, and at the same time, it contacts the cleaning plate 25 while moving up and down, and can be cleaned. Then the impurities can be uniformly collected and processed by the collection device under the empty slot, so as to ensure the dust filtering effect and service life of the filter 23.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A waste gas pretreatment combustion device, comprising an air intake pipe (1) and a washing tower (2), characterized in that: The air inlet pipe (1) is provided with a first branch pipe (3), and a thermocouple (5) is provided inside the air inlet pipe (1). The air inlet pipe (1) is connected to the washing tower (2). A fan (4) is also provided on the air inlet pipe (1), and a pretreatment mechanism is provided between the fan (4) and the first branch pipe (3). An ash removal component is provided inside the washing tower (2). A U-shaped pipe (6) is connected to the air outlet pipe at the top end of the washing tower (2), a drying component is provided on the U-shaped pipe (6), and an exhaust gas combustion mechanism is provided at the bottom end of the U-shaped pipe (6).

2. The exhaust gas pretreatment combustion device according to claim 1, characterized in that: The pretreatment mechanism comprises a filter screen (23) arranged inside the air intake pipe (1), the top and bottom ends of the filter screen (23) being connected to the inner wall of the air intake pipe (1) via elastic connecting belts (24), a cleaning plate (25) being equidistantly provided at one end of the filter screen (23) close to the first branch pipe (3), and the top end of the air intake pipe (1) being connected to the filter screen (23) via a driving assembly.

3. The exhaust gas pretreatment combustion device according to claim 2, characterized in that: The driving assembly comprises a cleaning motor (20) arranged on an air intake pipe (1); a crankshaft (21) is fixedly provided at the output end of the cleaning motor (20); the crankshaft (21) is provided with a connecting column (26) via a rotating member (22); the connecting column (26) slides through the air intake pipe (1) and is fixedly connected to the filter screen (23).

4. The exhaust gas pretreatment combustion device according to claim 3, characterized in that: The ash removal component comprises a stirring motor (13) arranged at the bottom end of the washing tower (2), and the output end of the stirring motor (13) passes through the washing tower (2) and extends to the inside where stirring blades (14) are equidistantly arranged.

5. The exhaust gas pretreatment combustion device according to claim 4, characterized in that: The ash removal assembly also includes a spray pipe (16) arranged inside the washing tower (2) and above the stirring blade (14), spray heads (17) are equidistantly arranged below the spray pipe (16), and a drainage outlet (15) is also provided at the bottom end of the washing tower (2).

6. The exhaust gas pretreatment combustion device according to claim 5, characterized in that: The drying component comprises a dehydration packing layer (18) arranged inside the washing tower (2) and above the spray pipe (16), and a demisting screen (7) is provided at the top of the U-shaped tube (6), and a heater (8) is provided at one end of the U-shaped tube (6) close to the exhaust gas combustion mechanism.

7. The exhaust gas pretreatment combustion device according to claim 6, characterized in that: The exhaust gas combustion mechanism comprises a combustion chamber (10) connected to a U-shaped tube (6), a burner (11) is arranged inside the combustion chamber (10), an air outlet (19) is arranged at one end of the combustion chamber (10) away from the washing tower (2), and a second branch pipe (9) matching the combustion chamber (10) is also arranged on the U-shaped tube (6).

8. The exhaust gas pretreatment combustion device according to claim 7, characterized in that: The washing tower (2) and the combustion chamber (10) are both provided with inspection openings (12).

Images