A blank gas heating exhaust gas treatment system

Abstract

The utility model discloses a kind of waste gas treatment systems for blank gas heating, specifically related to waste gas treatment technical field, including upper cylinder and the lower cylinder fixed in the bottom end of upper cylinder, and lower cylinder top end extends into the inside of upper cylinder, the filter plate is fixed in the inside of lower cylinder, the inside of upper cylinder is located in the top end of lower cylinder and is fixed with gas outlet coil pipe, the top of gas outlet coil pipe is equipped with spray coil pipe, filtered waste gas is shunted by gas outlet coil pipe, then spray coil pipe carries out processing to the waste gas after shunting with spray agent, the inner wall of lower cylinder is fixed with multiple connecting pipes, one end of connecting pipe is fixed with spray head, the spray head is located in the top of filter plate, and the other end of connecting pipe is communicated with the inner bottom of lower cylinder, and the inside of upper cylinder is sprayed downward by spray head, for the pretreatment of waste gas. The utility model realizes multiple purification to waste gas, improves waste gas treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment, specifically to a waste gas treatment system for gas heating of billets. Background Technology

[0002] Gas-fired heating uses combustible gases such as natural gas and liquefied petroleum gas as energy sources. Through combustion, it releases heat to heat automotive metal blanks, such as steel and aluminum blanks, to specific temperatures to meet the requirements of subsequent forging, stamping, and bending processes. Compared to electric heating, gas-fired heating offers faster heating rates, a wider temperature control range, and lower operating costs, making it widely used in automotive parts manufacturing workshops.

[0003] Gas heating generates waste gas containing toxic and harmful pollutants. Direct emission of this waste gas would endanger the environment and human health, thus requiring treatment. One approach is to use a biomass gas boiler waste gas purification and emission device disclosed in prior art publication number CN222885589U, which treats the waste gas by reacting a sprayed purification medium with it. However, this prior art has the following drawbacks in practical use: the purification medium reacts with the waste gas only once during the spraying process, failing to achieve sufficient contact between the medium and the gas, resulting in poor purification efficiency. Summary of the Invention

[0004] Therefore, this utility model provides a waste gas treatment system for gas heating of blanks, which realizes multiple purification of waste gas and improves the waste gas treatment effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste gas treatment system for gas heating of billets, comprising an upper cylinder and a lower cylinder fixed at the bottom of the upper cylinder, wherein the top of the lower cylinder extends into the interior of the upper cylinder.

[0006] The lower cylinder is equipped with a filter plate for filtering exhaust gas.

[0007] An exhaust coil is fixed inside the upper cylinder at the top of the lower cylinder. A spray coil is provided at the top of the exhaust coil. The filtered exhaust gas is diverted through the exhaust coil, and then the spray coil sprays the diverted exhaust gas with a chemical agent for treatment.

[0008] Multiple connecting pipes are fixed to the inner wall of the lower cylinder. A nozzle is fixed to one end of each connecting pipe. The nozzle is located on the top of the filter plate, and the other end of the connecting pipe is connected to the bottom of the lower cylinder. The agent in the upper cylinder is sprayed downward through the nozzle for pretreatment of the waste gas.

[0009] Furthermore, the upper and lower cylinders are fixed to the same outer sleeve, and a heat exchange cavity is formed between the inner wall of the outer sleeve and the outer walls of the upper and lower cylinders.

[0010] Furthermore, an air inlet pipe is fixed to the outer wall of the lower cylinder, the air inlet pipe passes through the outer cylinder and extends out of the outer cylinder, and the end of the air inlet pipe near the lower cylinder is located at the bottom of the filter plate; the end of the air inlet pipe away from the filter plate is connected to the cyclone separator, and an air outlet pipe is fixed to the top of the upper cylinder. After the exhaust gas is treated by the cyclone separator for dust removal, it is transported into the lower and upper cylinders for further treatment, and the treated exhaust gas is discharged through the air outlet pipe.

[0011] Furthermore, one end of the air outlet coil is connected to the interior of the lower cylinder, and one end of the spray coil is fixed with a medicine inlet pipe. The medicine inlet pipe passes through the upper cylinder and the outer cylinder and extends out of the outer cylinder. Multiple through holes are opened on the side of the air outlet coil and the spray coil that are close to each other.

[0012] Furthermore, a cleaning assembly is provided inside the lower cylinder. The cleaning assembly includes a rotating rod, a brush plate is fixed to the top of the rotating rod, and bristles are fixed to the top of the brush plate, with the bristle tips contacting the bottom end of the filter plate. The bottom end of the rotating rod extends out of the bottom end of the lower cylinder, and the rotating rod is rotatably connected to the lower cylinder. A motor for driving the rotating rod to rotate is fixed to the bottom end of the lower cylinder, which facilitates cleaning the bottom end of the filter plate.

[0013] Furthermore, an inlet pipe and a drain pipe are fixed to the top and bottom of the outer wall of the outer sleeve, respectively, to facilitate the injection and discharge of water into the heat exchange chamber.

[0014] Furthermore, a water collecting ring is fixed at the top of the upper cylinder. The water collecting ring is hollow inside, and multiple spray holes communicating with its interior are opened at the bottom of the water collecting ring.

[0015] Furthermore, a drain pipe is fixed to the bottom of the outer wall of the lower cylinder, and the drain pipe passes through the outer cylinder and extends out of the outer cylinder.

[0016] Furthermore, a water pump is fixed inside the heat exchange chamber, and the outlet of the water pump is connected to the inside of the water collection ring through a water pipe, which facilitates the transportation of water from the heat exchange chamber into the water collection ring to clean the inside of the upper and lower cylinders, and the wastewater from the cleaning is discharged through the drain pipe.

[0017] This utility model has the following advantages: 1. The exhaust gas is first pretreated by a cyclone separator and filter plates to effectively prevent impurities from clogging the subsequent reaction devices. Then, the residual reagents from the previous reaction process are used to react with the exhaust gas to remove some harmful components, achieving a second pretreatment. Finally, the pretreated exhaust gas is diverted and mixed with the diverted reagents to increase the contact area and allow the reagents to react fully with the exhaust gas. Compared with the existing technology, this utility model achieves multiple purification of exhaust gas and improves the exhaust gas treatment effect. 2. A heat exchange chamber is formed by the upper cylinder, lower cylinder and outer cylinder. The high-temperature waste gas directly exchanges heat with the water in the chamber to realize waste heat recovery. The hot water after heat exchange can be used for factory water or for cleaning the equipment, saving costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of the upper cylinder, lower cylinder, and outer cylinder; Figure 3 This is a sectional view of the outer sleeve; Figure 4 This is a sectional view of the upper cylinder, lower cylinder, and outer cylinder; Figure 5 Here are structural diagrams of the air outlet coil and the spray coil; Figure 6 A partial structural diagram of the filter plate and cleaning assembly; Figure 7 for Figure 4 Enlarged view of section A in the middle; In the diagram: 1. Upper cylinder; 2. Lower cylinder; 3. Filter plate; 4. Air outlet coil; 5. Spray coil; 6. Spray head; 7. Outer sleeve; 8. Heat exchange chamber; 9. Air inlet pipe; 10. Cyclone separator; 11. Air outlet pipe; 12. Drug inlet pipe; 13. Cleaning components; 131. Rotating rod; 132. Brush plate; 133. Brush bristles; 134. Motor; 14. Connecting pipe; 15. Water collection ring; 16. Sewage pipe; 17. Water pump; 18. Water pipe; 19. Drainage pipe; 20. Water inlet pipe. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Refer to the instruction manual appendix Figure 1-7 This utility model provides a waste gas treatment system for gas heating of billets, including an upper cylinder 1 and a lower cylinder 2 fixed at the bottom of the upper cylinder 1, with the top end of the lower cylinder 2 extending into the interior of the upper cylinder 1. The outer walls of the upper cylinder 1 and the lower cylinder 2 are fixed with the same outer sleeve 7. A heat exchange cavity 8 is formed between the inner wall of the outer sleeve 7 and the outer walls of the upper cylinder 1 and the lower cylinder 2. A drain pipe 16 is fixed at the bottom of the outer wall of the lower cylinder 2, and the drain pipe 16 penetrates the outer sleeve 7 and extends out of the outer sleeve 7.

[0021] A filter plate 3 is fixed inside the lower cylinder 2, and an air inlet pipe 9 is fixed on the outer wall of the lower cylinder 2. The air inlet pipe 9 passes through the outer cylinder 7 and extends out of the outer cylinder 7. One end of the air inlet pipe 9 near the lower cylinder 2 is located at the bottom of the filter plate 3, and the other end of the air inlet pipe 9 away from the filter plate 3 is connected to the cyclone separator 10. An air outlet pipe 11 is fixed at the top of the upper cylinder 1.

[0022] An air outlet coil 4 is fixed inside the upper cylinder 1 at the top of the lower cylinder 2. One end of the air outlet coil 4 is connected to the inside of the lower cylinder 2. A spray coil 5 is provided at the top of the air outlet coil 4. Multiple through holes are opened on the side of the air outlet coil 4 and the spray coil 5 that are close to each other. A medicine inlet pipe 12 is fixed at one end of the spray coil 5. The medicine inlet pipe 12 passes through the upper cylinder 1 and the outer cylinder 7 and extends out of the outer cylinder 7. The medicine inlet pipe 12 is connected to the medicine delivery pipeline. The appropriate catalyst can be selected based on the waste gas treatment requirements. For example, the main harmful gas produced by high-temperature combustion of gas is nitrogen oxides, accounting for over 90% of NO. A MnO2-CeO2 composite catalyst can convert it into harmless N2. Similarly, small amounts of methane, ethane, and benzene produced by incomplete combustion of gas can be oxidized to CO2 and H2O using precious metal catalysts or metal oxide catalysts.

[0023] The exhaust gas first separates dust, metal shavings, etc. from the exhaust gas through the cyclone separator 10. Then the exhaust gas enters the lower cylinder 2 through the inlet pipe 9 and is filtered again by the filter plate 3 before entering the outlet coil 4. The exhaust gas flows upward through the through hole in the outlet coil 4 and is divided. At the same time, the agent is transported into the spray coil 5 through the inlet pipe 12. Then the agent flows downward through the through hole in the spray coil 5 and is divided. The divided exhaust gas and the agent react and mix, so that the agent can fully treat the exhaust gas. The treated exhaust gas is discharged through the outlet pipe 11. Meanwhile, this utility model has multiple connecting pipes 14 fixed on the inner wall of the lower cylinder 2. One end of each connecting pipe 14 is fixed with a nozzle 6, which is located on the top of the filter plate 3. The other end of the connecting pipe 14 is connected to the bottom of the lower cylinder 2. The liquid produced by the reaction between the waste gas and the agent in the lower cylinder 2 falls into the bottom of the upper cylinder 1. Then, the liquid is sprayed into the lower cylinder 2 through the nozzle 6. At this time, the agent remaining in the liquid can pre-treat the waste gas flowing in the lower cylinder 2 after being filtered by the filter plate 3. The pre-treated waste gas then enters the lower cylinder 2 for further treatment, which improves the waste gas treatment effect.

[0024] like Figures 1-4 and Figure 6As shown, the lower cylinder 2 is equipped with a cleaning assembly 13, which includes a rotating rod 131. A brush plate 132 is fixed to the top of the rotating rod 131, and brush bristles 133 are fixed to the top of the brush plate 132. The top of the brush bristles 133 contacts the bottom of the filter plate 3. The bottom of the rotating rod 131 extends out of the bottom of the lower cylinder 2 and is rotatably connected to the lower cylinder 2. A motor 134 is fixed to the bottom of the lower cylinder 2 to drive the rotating rod 131 to rotate, thereby driving the brush bristles 133 to rotate and clean the bottom of the filter plate 3, preventing the filter plate 3 from clogging. Then, the waste liquid after the exhaust gas treatment in the lower cylinder 2 and the impurities cleaned on the filter plate 3 are discharged together through the drain pipe 16.

[0025] like Figures 1-4 and Figure 7 As shown, an inlet pipe 20 and a drain pipe 19 are fixed to the top and bottom of the outer wall of the outer sleeve 7, respectively, and valves are fixed on both the inlet pipe 20 and the drain pipe 19 to facilitate the injection and discharge of water into the heat exchange chamber 8.

[0026] The water in the heat exchange chamber 8 can exchange heat with the high-temperature exhaust gas in the upper cylinder 1 and lower cylinder 2 to collect the waste heat of the exhaust gas. In actual use, a temperature sensor can be installed in the heat exchange chamber 8. When the temperature sensor detects that the water temperature in the heat exchange chamber 8 is suitable, hot water is discharged through the drain pipe 19 and then water is injected into the heat exchange chamber 8 through the inlet pipe 20. The released hot water can be used for factory water, saving factory costs.

[0027] Next, a water collecting ring 15 is fixed at the top inside the upper cylinder 1. The water collecting ring 15 is hollow inside, and multiple spray holes communicating with its interior are opened at the bottom end of the water collecting ring 15. A water pump 17 is fixed inside the heat exchange chamber 8, and the outlet of the water pump 17 is connected to the inside of the water collecting ring 15 through a water pipe 18.

[0028] When the interior of the upper cylinder 1 and the lower cylinder 2 needs to be cleaned, the hot water in the heat exchange chamber 8 is pumped into the water collection ring 15 by the water pump 17. Then the hot water flows down through the spray hole at the bottom of the water collection ring 15 to clean the interior of the upper cylinder 1. The water then enters the lower cylinder 2 through the spray nozzle 6 to clean the lower cylinder 2. The wastewater from the cleaning is discharged through the drain pipe 16.

[0029] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A waste gas treatment system for gas heating of billets, characterized in that: It includes an upper cylinder (1) and a lower cylinder (2) fixed to the bottom of the upper cylinder (1), and the top of the lower cylinder (2) extends into the interior of the upper cylinder (1); The lower cylinder (2) is equipped with a filter plate (3) for filtering exhaust gas. The upper cylinder (1) is fixed with an exhaust coil (4) at the top of the lower cylinder (2). The top of the exhaust coil (4) is equipped with a spray coil (5). The filtered waste gas is diverted through the exhaust coil (4), and then the spray coil (5) sprays the diverted waste gas with a chemical agent for treatment. Multiple connecting pipes (14) are fixed on the inner wall of the lower cylinder (2). A nozzle (6) is fixed at one end of the connecting pipe (14). The nozzle (6) is located on the top of the filter plate (3), and the other end of the connecting pipe (14) is connected to the bottom of the lower cylinder (2). The agent in the upper cylinder (1) is sprayed downward through the nozzle (6) for pretreatment of the waste gas.

2. The waste gas treatment system for gas heating of billets according to claim 1, characterized in that: The upper cylinder (1) and the lower cylinder (2) are fixed with the same outer sleeve (7), and a heat exchange cavity (8) is formed between the inner wall of the outer sleeve (7) and the outer walls of the upper cylinder (1) and the lower cylinder (2).

3. The waste gas treatment system for gas heating of billets according to claim 2, characterized in that: An air inlet pipe (9) is fixed to the outer wall of the lower cylinder (2). The air inlet pipe (9) passes through the outer cylinder (7) and extends out of the outer cylinder (7). One end of the air inlet pipe (9) near the lower cylinder (2) is located at the bottom of the filter plate (3). The end of the air inlet pipe (9) away from the filter plate (3) is connected to the cyclone separator (10). The top of the upper cylinder (1) is fixed with an air outlet pipe (11). After the exhaust gas is treated by the cyclone separator (10) for dust removal, it is transported into the lower cylinder (2) and the upper cylinder (1) for treatment. The treated exhaust gas is discharged through the air outlet pipe (11).

4. The waste gas treatment system for gas heating of billets according to claim 2, characterized in that: One end of the air outlet coil (4) is connected to the interior of the lower cylinder (2), and one end of the spray coil (5) is fixed with a medicine inlet pipe (12). The medicine inlet pipe (12) passes through the upper cylinder (1) and the outer cylinder (7) and extends out of the outer cylinder (7). Multiple through holes are opened on the side of the air outlet coil (4) and the spray coil (5) that are close to each other.

5. The waste gas treatment system for gas heating of billets according to claim 1, characterized in that: The lower cylinder (2) is equipped with a cleaning component (13). The cleaning component (13) includes a rotating rod (131). A brush plate (132) is fixed at the top of the rotating rod (131). Brush bristles (133) are fixed at the top of the brush plate (132), and the top of the brush bristles (133) contacts the bottom of the filter plate (3). The bottom end of the rotating rod (131) extends out of the bottom end of the lower cylinder (2), and the rotating rod (131) is rotatably connected to the lower cylinder (2). The bottom end of the lower cylinder (2) is fixed with a motor (134) for driving the rotating rod (131) to rotate, which facilitates cleaning the bottom end of the filter plate (3).

6. The waste gas treatment system for gas heating of billets according to claim 2, characterized in that: The top and bottom of the outer wall of the outer sleeve (7) are respectively fixed with a water inlet pipe (20) and a drain pipe (19) to facilitate the injection and discharge of water into the heat exchange chamber (8).

7. The waste gas treatment system for gas heating of billets according to claim 2, characterized in that: The upper cylinder (1) has a water collection ring (15) fixed at the top inside. The water collection ring (15) is hollow inside, and the bottom of the water collection ring (15) has multiple spray holes that communicate with its interior.

8. The waste gas treatment system for gas heating of billets according to claim 7, characterized in that: A drain pipe (16) is fixed to the bottom of the outer wall of the lower cylinder (2). The drain pipe (16) passes through the outer cylinder (7) and extends out of the outer cylinder (7).

9. The waste gas treatment system for gas heating of billets according to claim 8, characterized in that: A water pump (17) is fixed inside the heat exchange chamber (8). The outlet of the water pump (17) is connected to the inside of the water collection ring (15) through a water pipe (18), so that water in the heat exchange chamber (8) can be transported into the water collection ring (15) to clean the inside of the upper cylinder (1) and the lower cylinder (2), and the wastewater from the cleaning is discharged through the drain pipe (16).

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