Negative pressure exhaust pipeline structure of heat storage oxidation furnace

Abstract

The utility model belongs to the technical field of waste gas treatment, and discloses a negative pressure exhaust pipeline structure of a heat storage oxidizing furnace, which comprises a furnace body, the furnace body comprises a combustion oxidizing chamber, a first heat storage chamber and a second heat storage chamber, and ceramic heat storage bodies are arranged in the first heat storage chamber and the second heat storage chamber. A high-pressure fan, an air inlet pipeline and an air outlet pipeline are arranged outside the furnace body, the high-pressure fan is connected with the air inlet pipeline, the air inlet pipeline and the air outlet pipeline are communicated with the furnace body, and the air inlet pipeline comprises an air inlet main pipe, an air inlet branch pipe, a first control valve and a second control valve. The gas outlet pipeline comprises a gas outlet main pipe, a gas outlet branch pipe, a third control valve and a fourth control valve, a reverse blowing fan is installed at the top end of the furnace body, the output end of the reverse blowing fan is connected with a reverse blowing part, and the reverse blowing part comprises a switching valve, a reverse blowing pipe, an electromagnetic valve, an exhaust pipe, a fifth control valve and a sixth control valve. In this way, back flushing cleaning of the ceramic heat accumulator is achieved.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment, in particular to a negative pressure exhaust pipeline structure of a thermal storage oxidation furnace. Background Art

[0002] The regenerative thermal oxidizer is a common equipment for treating VOC waste gas. Its principle is to heat the organic waste gas to a certain temperature and then oxidize and decompose the VOC in the waste gas into carbon dioxide and water. The high-temperature gas generated by oxidation flows through a special ceramic regenerative body, which heats up the ceramic body and stores heat. This heat storage is used to preheat the subsequent organic waste gas, thereby saving fuel consumption for heating the waste gas. A general regenerative thermal oxidizer includes a furnace body, a regenerative chamber, a combustion oxidation chamber, a ceramic regenerative body, pipelines and a fan.

[0003] The Chinese patent application number CN202120259901.8 currently discloses an RTO thermal storage oxidizer, including a shell and a piping system connected to the inside of the shell, a combustion chamber is provided in the middle of the shell, an oxidation chamber is provided on one side of the combustion chamber, and a first thermal storage chamber and a second thermal storage chamber are provided on the other side, the first thermal storage chamber and the second thermal storage chamber are separated by a spacer block, and thermal storage bodies are respectively provided in the oxidation chamber, the first thermal storage chamber and the second thermal storage chamber, and the piping system exhausts and supplies gas to the first thermal storage chamber, the second thermal storage chamber and the oxidation chamber. The present application arranges the oxidation chamber and the heat storage chamber on both sides of the combustion chamber respectively, which simplifies the treatment process experienced by the heat storage bodies in the oxidation chamber and the two heat storage chambers, thereby simplifying the control method of the valves that control the opening and closing of each gas flow pipeline, and at the same time reduces the energy consumption of repeatedly heating the heat storage bodies in the heat storage chambers. However, when the untreated exhaust gas passes through the heat storage body to store heat, due to the honeycomb pore structure of the ceramic heat storage body itself, exhaust gas residues will exist inside. When the treated exhaust gas is discharged through the heat storage body, it will be discharged with the residues, affecting the effect of exhaust gas treatment.

[0004] Based on this, the utility model designs a negative pressure exhaust pipeline structure of a thermal storage oxidation furnace to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a negative pressure exhaust pipeline structure of a thermal storage oxidation furnace.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A negative pressure exhaust pipeline structure of a regenerative oxidation furnace, comprising a furnace body, the furnace body comprising a combustion oxidation chamber, a first regenerative chamber and a second regenerative chamber, the first regenerative chamber and the second regenerative chamber are both equipped with ceramic regenerative bodies, a high pressure blower, an air inlet pipeline and an air outlet pipeline are arranged outside the furnace body, the high pressure blower is connected to the air inlet pipeline, the air inlet pipeline, the air outlet pipeline and the furnace body are connected, the air inlet pipeline comprises an air inlet main pipe, an air inlet branch pipe, a first control valve and a second control valve, the air outlet pipeline comprises an air outlet main pipe, an air outlet branch pipe, a third control valve and a fourth control valve, a back-blowing blower is installed at the top of the furnace body, the output end of the back-blowing blower is connected to a back-blowing component, the back-blowing component comprises a switching valve, a back-blowing pipe, a solenoid valve, an exhaust pipe, a fifth control valve and a sixth control valve;

[0008] Furthermore, the combustion oxidation chamber is arranged at the upper part of the furnace body, and the first regenerator and the second regenerator are symmetrically arranged at the lower part of the furnace body;

[0009] Furthermore, the switching valve is installed at the output end of the back-blowing blower, the back-blowing pipe is connected to the end of the switching valve, the solenoid valve is arranged at the end of the back-blowing pipe, the exhaust pipe is arranged at the bottom end of the furnace body and is connected to the first heat storage chamber and the second heat storage chamber, the fifth control valve is arranged at the position where the exhaust pipe is connected to the first heat storage chamber and the second heat storage chamber, and the sixth control valve is arranged at the end of the exhaust pipe;

[0010] Furthermore, the backflush pipe passes through the top of the furnace body and its bottom end is arranged close to the ceramic heat storage body;

[0011] Furthermore, one end of the exhaust pipe is connected to the intake main pipe, and the sixth control valve is arranged at the connecting position between the exhaust pipe and the intake main pipe;

[0012] Furthermore, the exhaust pipe and the air intake pipe are connected at a position close to the high-pressure blower;

[0013] Furthermore, one end of the air intake main pipe is connected to the high-pressure fan, and the other end of the air intake main pipe is connected to the second heat storage chamber. The first control valve is arranged at the connecting position between the air intake main pipe and the second heat storage chamber, and the air intake branch pipe is respectively connected to the air intake main pipe and the first heat storage chamber, and the second control valve is arranged at the connecting position between the air intake branch pipe and the air intake main pipe;

[0014] Furthermore, one end of the gas outlet main pipe is connected to the first heat storage chamber, the gas outlet branch pipe is connected to the gas outlet main pipe and the second heat storage chamber respectively, the third control valve is arranged at the connecting position of the gas outlet main pipe and the first heat storage chamber, and the fourth control valve is arranged at the connecting position of the gas outlet main pipe and the gas outlet branch pipe;

[0015] Beneficial effects: 1. By setting a back-blowing part, using a back-blowing blower, a switching valve, a back-blowing pipe, a solenoid valve, an exhaust pipe, a fifth control valve and a sixth control valve, the back-blowing blower is turned on, the solenoid valve connected to the first heat storage chamber and the fifth control valve and the sixth control valve are turned on, the back-blowing blower blows the gas through the back-blowing pipe to the ceramic heat storage body in the first heat storage chamber through the switching valve, and the residual input exhaust gas inside is transported to the air intake pipe through the exhaust pipe below, so as to achieve back-blowing cleaning of the exhaust gas in the first heat storage chamber, and at the same time, the back-blowing blower is turned on, the solenoid valve connected to the second heat storage chamber and the fifth control valve and the sixth control valve are turned on, the back-blowing blower blows the gas through the back-blowing pipe to the ceramic heat storage body in the second heat storage chamber through the switching valve, and the residual input exhaust gas inside is transported to the air intake pipe through the exhaust pipe below, so as to achieve back-blowing cleaning of the exhaust gas in the second heat storage chamber;

[0016] 2. By setting up independent air inlet and air outlet pipelines, through the air inlet main pipe, air inlet branch pipe, the first control valve and the second control valve, as well as the air outlet main pipe, air outlet branch pipe, the third control valve and the fourth control valve, the entry of exhaust gas and the discharge of treated gas do not interfere with each other, thereby ensuring the treatment effect of the discharged gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The utility model is a stereoscopic diagram of the main structure of a negative pressure exhaust pipeline structure of a thermal storage oxidation furnace.

[0019] Figure 2 The utility model is a three-dimensional diagram of the furnace body structure of a negative pressure exhaust pipeline structure of a thermal storage oxidation furnace.

[0020] Figure 3 The utility model is a stereoscopic diagram of the air inlet pipeline and the air outlet pipeline structure of the negative pressure exhaust pipeline structure of the thermal storage oxidation furnace.

[0021] Figure 4 The utility model is a three-dimensional diagram of the back-blowing component structure of the negative pressure exhaust pipeline structure of the thermal storage oxidation furnace.

[0022] The numbers in the figure represent: 1. furnace body; 2. combustion oxidation chamber; 3. first heat storage chamber; 4. second heat storage chamber; 5. ceramic heat storage body; 6. high-pressure fan; 7. air inlet main pipe; 8. air inlet branch pipe; 9. first control valve; 10. second control valve; 11. air outlet main pipe; 12. air outlet branch pipe; 13. third control valve; 14. fourth control valve; 15. back-blowing machine; 16. switching valve; 17. back-blowing pipe; 18. solenoid valve; 19. exhaust pipe; 20. fifth control valve; 21. sixth control valve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0024] The utility model is further described below in conjunction with embodiments.

[0025] In some embodiments, please refer to the attached instructions. Figure 1 , Figure 2 , Figure 3 and Figure 4A negative pressure exhaust pipeline structure of a thermal storage oxidation furnace includes a furnace body 1, the furnace body 1 includes a combustion oxidation chamber 2, a first thermal storage chamber 3 and a second thermal storage chamber 4, the combustion oxidation chamber 2 is arranged at the upper part of the furnace body 1, the first thermal storage chamber 3 and the second thermal storage chamber 4 are symmetrically arranged at the lower part of the furnace body 1, and a ceramic thermal storage body 5 is installed in the first thermal storage chamber 3 and the second thermal storage chamber 4. A high-pressure fan 6, an air inlet pipeline and an air outlet pipeline are arranged outside the furnace body 1. The high-pressure fan 6 is connected to the air inlet pipeline, and the air inlet pipeline, the air outlet pipeline and the furnace body 1 are connected. The air inlet pipeline includes an air inlet main pipe 7, an air inlet branch pipe 8, a first control valve 9 and a second control valve 10. The air outlet pipeline includes an air outlet main pipe 11, an air outlet branch pipe 12, a third control valve 13 and a fourth control valve 14. A back blower 15 is installed at the top of the furnace body 1, and an output end of the back blower 15 A back-blowing component is connected, and the back-blowing component includes a switching valve 16, a back-blowing pipe 17, a solenoid valve 18, an exhaust pipe 19, a fifth control valve 20 and a sixth control valve 21. The switching valve 16 is installed at the output end of the back-blowing blower 15, and the back-blowing pipe 17 is connected to the end of the switching valve 16. The back-blowing pipe 17 runs through the top of the furnace body 1 and its bottom end is arranged near the ceramic heat storage body 5. The solenoid valve 18 is arranged at the end of the back-blowing pipe 17. The exhaust pipe 19 is arranged at the bottom of the furnace body 1 and is connected to the first heat storage chamber 3 and the second heat storage chamber 4. One end of the exhaust pipe 19 is connected to the air intake main pipe 7. The connecting position of the exhaust pipe 19 and the air intake main pipe 7 is arranged near the high-pressure blower 6. The fifth control valve 20 is arranged at the connecting position of the exhaust pipe 19 and the first heat storage chamber 3 and the second heat storage chamber 4. The sixth control valve 21 is arranged at the connecting position of the exhaust pipe 19 and the air intake main pipe 7;

[0026] In the embodiment of the utility model, when it is used specifically, first, through the air intake pipeline, the high-pressure blower 6 allows the exhaust gas to enter the first heat storage chamber 3 through the air intake main pipe 7 and the air intake branch pipe 8, and the exhaust gas is stored in the ceramic heat storage body 5 before reaching the combustion oxidation chamber 2 for combustion oxidation treatment. After the treatment is completed, the hot gas passes through the air outlet pipeline, and the ceramic heat storage body 5 in the second heat storage chamber 4 is heated, and then leaves through the air outlet branch pipe 12. After the first step is completed, the high-pressure blower 6 is turned off, the second control valve 10 and the fourth control valve 14 are closed, the back-blowing blower 15 is turned on, the solenoid valve 18 connected to the first heat storage chamber 3 and the fifth control valve 20 and the sixth control valve 21 are turned on, and the back-blowing blower 15 blows the gas through the back-blowing pipe 17 through the switching valve 16 to the ceramic heat storage body 5 in the first heat storage chamber 3, and transports the residual input exhaust gas inside it to the air intake main pipe through the exhaust pipe 19 below. 7, then close the sixth control valve 21 and the back-blowing air 15, and then enter the second heat storage chamber 4 through the intake pipe, and arrive at the combustion oxidation chamber 2 for combustion oxidation treatment after being preheated by the ceramic heat storage body 5. After the treatment is completed, the hot gas passes through the outlet pipe, and the ceramic heat storage body 5 in the first heat storage chamber 3 is heated, and then leaves through the outlet pipe 11. After the second step of treatment is completed, close the high-pressure fan 6, close the first control valve 9 and the third control valve 13, open the back-blowing air 15, open the solenoid valve 18 connected to the second heat storage chamber 4 and the fifth control valve 20 and the sixth control valve 21, and the back-blowing air 15 blows the gas through the back-blowing pipe 17 through the switching valve 16 to the ceramic heat storage body 5 in the second heat storage chamber 4, and transports the residual input exhaust gas inside to the intake pipe 7 through the exhaust pipe 19 below, and repeat the above steps to achieve continuous exhaust gas treatment;

[0027] In the embodiment of the utility model, by setting a back-blowing part, using the back-blowing blower 15, the switching valve 16, the back-blowing pipe 17, the solenoid valve 18, the exhaust pipe 19, the fifth control valve 20 and the sixth control valve 21, the back-blowing blower 15 is turned on, the solenoid valve 18 connected to the first heat storage chamber 3 and the fifth control valve 20 and the sixth control valve 21 are turned on, the back-blowing blower 15 blows the gas through the back-blowing pipe 17 through the switching valve 16 to the ceramic heat storage body 5 in the first heat storage chamber 3, and the residual input exhaust gas inside is discharged through the lower The exhaust pipe 19 is transported to the intake main pipe 7 to realize back-blowing cleaning of the exhaust gas in the first heat storage chamber 3. At the same time, the back-blowing blower 15 is turned on, and the solenoid valve 18 connected to the second heat storage chamber 4 and the fifth control valve 20 and the sixth control valve 21 are turned on. The back-blowing blower 15 blows the gas through the back-blowing pipe 17 to the ceramic heat storage body 5 in the second heat storage chamber 4 through the switching valve 16, and the residual input exhaust gas inside is transported to the intake main pipe 7 through the exhaust pipe 19 below, so as to realize back-blowing cleaning of the exhaust gas in the second heat storage chamber 4;

[0028] In some embodiments, Figure 3As shown, as a preferred embodiment of the utility model, one end of the air intake main pipe 7 is connected to the high-pressure fan 6, and the other end of the air intake main pipe 7 is connected to the second heat storage chamber 4. The first control valve 9 is arranged at the connecting position of the air intake main pipe 7 and the second heat storage chamber 4, the air intake branch pipe 8 is respectively connected to the air intake main pipe 7 and the first heat storage chamber 3, the second control valve 10 is arranged at the connecting position of the air intake branch pipe 8 and the air intake main pipe 7, one end of the air outlet main pipe 11 is connected to the first heat storage chamber 3, the air outlet branch pipe 12 is respectively connected to the air outlet main pipe 11 and the second heat storage chamber 4, the third control valve 13 is arranged at the connecting position of the air outlet main pipe 11 and the first heat storage chamber 3, and the fourth control valve 14 is arranged at the connecting position of the air outlet main pipe 11 and the air outlet branch pipe 12;

[0029] In the embodiment of the utility model, when it is used specifically, the second control valve 10 is opened, the first control valve 9 and the sixth control valve 21 are closed, the high-pressure blower 6 allows the exhaust gas to enter the first heat storage chamber 3 through the air intake main pipe 7 and the air intake branch pipe 8, and the exhaust gas reaches the combustion oxidation chamber 2 for combustion oxidation treatment after heat storage through the ceramic heat storage body 5. After the treatment is completed, the fourth control valve 14 connected to the second heat storage chamber 4 is opened, and the third control valve 13 is closed. The hot gas heats the ceramic heat storage body 5 in the second heat storage chamber 4 and leaves through the air outlet branch pipe 12. After the first step of the treatment is completed, the high-pressure blower 6 is closed, the second control valve 10 and the fourth control valve 14 are closed, the back-blowing blower 15 is opened, the solenoid valve 18 connected to the first heat storage chamber 3 and the fifth control valve 20 and the sixth control valve 21 are opened, and the back-blowing blower 15 blows the gas through the back-blowing pipe 17 to the ceramic heat storage body 5 in the first heat storage chamber 3 through the switching valve 16, and the residual input exhaust gas inside it is discharged through the exhaust pipe 1 below. 9 is transported to the air intake pipe 7, and then the sixth control valve 21 and the back-blowing air blower 15 are closed, the first control valve 9 is opened, and the high-pressure blower 6 is started, so that the exhaust gas enters the second heat storage chamber 4 through the air intake pipe 7, and arrives at the combustion oxidation chamber 2 for combustion oxidation treatment after being preheated by the ceramic heat storage body 5. After the treatment is completed, the third control valve 13 connected to the first heat storage chamber 3 is opened, and the hot gas heats the ceramic heat storage body 5 in the first heat storage chamber 3 and leaves through the air outlet pipe 11. After the second step of treatment is completed, the high-pressure blower 6 is closed, the first control valve 9 and the third control valve 13 are closed, the back-blowing air blower 15 is opened, and the electromagnetic valve 18 connected to the second heat storage chamber 4 and the fifth control valve 20 and the sixth control valve 21 are opened. The back-blowing air blower 15 blows the gas to the ceramic heat storage body 5 in the second heat storage chamber 4 through the back-blowing pipe 17 through the switching valve 16, and transports the residual input exhaust gas inside it to the air intake pipe 7 through the exhaust pipe 19 below, and repeats the above steps;

[0030] In the embodiment of the utility model, by setting up independent air intake pipelines and air outlet pipelines, through the air intake main pipe 7, the air intake branch pipe 8, the first control valve 9 and the second control valve 10, as well as the air outlet main pipe 11, the air outlet branch pipe 12, the third control valve 13 and the fourth control valve 14, the entry of exhaust gas and the discharge of treated gas do not interfere with each other, thereby ensuring the treatment effect of the discharged gas.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure exhaust pipeline structure of a thermal storage oxidation furnace, comprising a furnace body (1), characterized in that: The furnace body (1) comprises a combustion oxidation chamber (2), a first heat storage chamber (3) and a second heat storage chamber (4), wherein a ceramic heat storage body (5) is installed in the first heat storage chamber (3) and the second heat storage chamber (4), and a high-pressure fan (6), an air inlet pipeline and an air outlet pipeline are arranged outside the furnace body (1), wherein the high-pressure fan (6) is connected to the air inlet pipeline, the air inlet pipeline and the air outlet pipeline are connected to the furnace body (1), and the air inlet pipeline comprises an air inlet main pipe (7), an air inlet branch pipe (8), a first A control valve (9) and a second control valve (10), the gas outlet pipeline comprising a gas outlet main pipe (11), a gas outlet branch pipe (12), a third control valve (13) and a fourth control valve (14), a back-blowing blower (15) is installed at the top of the furnace body (1), the output end of the back-blowing blower (15) is connected to a back-blowing component, and the back-blowing component comprises a switching valve (16), a back-blowing pipe (17), a solenoid valve (18), an exhaust pipe (19), a fifth control valve (20) and a sixth control valve (21).

2. The negative pressure exhaust pipeline structure of the thermal storage oxidation furnace according to claim 1 is characterized in that: The combustion oxidation chamber (2) is arranged at the upper part of the furnace body (1), and the first heat storage chamber (3) and the second heat storage chamber (4) are symmetrically arranged at the lower part of the furnace body (1).

3. The negative pressure exhaust pipeline structure of the thermal storage oxidation furnace according to claim 2 is characterized in that: The switching valve (16) is installed at the output end of the back-blowing air blower (15); the back-blowing pipe (17) is connected to the end of the switching valve (16); the solenoid valve (18) is arranged at the end of the back-blowing pipe (17); the exhaust pipe (19) is arranged at the bottom end of the furnace body (1) and is connected to the first heat storage chamber (3) and the second heat storage chamber (4); the fifth control valve (20) is arranged at a position where the exhaust pipe (19) is connected to the first heat storage chamber (3) and the second heat storage chamber (4); and the sixth control valve (21) is arranged at the end of the exhaust pipe (19).

4. The negative pressure exhaust pipeline structure of the thermal oxidation furnace according to claim 3 is characterized in that: The backflush pipe (17) passes through the top of the furnace body (1) and its bottom end is arranged close to the ceramic heat storage body (5).

5. The negative pressure exhaust pipeline structure of the thermal oxidation furnace according to claim 4 is characterized in that: One end of the exhaust pipe (19) is connected to the intake main pipe (7), and the sixth control valve (21) is arranged at a position where the exhaust pipe (19) and the intake main pipe (7) are connected.

6. The negative pressure exhaust pipeline structure of the thermal oxidation furnace according to claim 5 is characterized in that: The position where the exhaust pipe (19) and the air intake main pipe (7) are connected is arranged close to the high-pressure blower (6).

7. The negative pressure exhaust pipeline structure of the thermal oxidation furnace according to claim 6 is characterized in that: One end of the air intake main pipe (7) is connected to the high-pressure fan (6), and the other end of the air intake main pipe (7) is connected to the second heat storage chamber (4). The first control valve (9) is arranged at a position where the air intake main pipe (7) and the second heat storage chamber (4) are connected. The air intake branch pipe (8) is respectively connected to the air intake main pipe (7) and the first heat storage chamber (3). The second control valve (10) is arranged at a position where the air intake branch pipe (8) and the air intake main pipe (7) are connected.

8. The negative pressure exhaust pipeline structure of the thermal storage oxidation furnace according to claim 7 is characterized in that: One end of the gas outlet main pipe (11) is connected to the first heat storage chamber (3), the gas outlet branch pipe (12) is respectively connected to the gas outlet main pipe (11) and the second heat storage chamber (4), the third control valve (13) is arranged at a position where the gas outlet main pipe (11) and the first heat storage chamber (3) are connected, and the fourth control valve (14) is arranged at a position where the gas outlet main pipe (11) and the gas outlet branch pipe (12) are connected.

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