A rotary thermal storage oxidation incinerator with high temperature reverse baking

Abstract

The present invention discloses a rotary heat storage oxidation incinerator with high-temperature back-baking, comprising a furnace body, wherein the upper part of the furnace body is a combustion zone, and the lower part is a heat storage zone, wherein the heat storage zone is formed by splicing a plurality of ceramic heat storage zones, a rotary valve is arranged below the furnace body, a plurality of partitions are arranged inside the rotary valve, each of the partitions is respectively connected with the corresponding ceramic heat storage zone through piping, a distribution air valve is arranged inside the piping, a bypass elbow is arranged on the side of each of the piping, a bypass ball valve is arranged at the bottom of the bypass elbow, a bypass air valve is arranged in the upper section of the bypass elbow, the upper end of each bypass elbow is connected to a bypass exhaust pipe, and the bypass exhaust pipe is connected to a chimney, a high-temperature top elbow is arranged on the top of the furnace body, the high-temperature top elbow is connected to the chimney through a high-temperature straight pipe, an over-temperature discharge valve is arranged inside the high-temperature straight pipe, a combustion mechanism is externally connected to the combustion zone, and a heat purge mechanism is externally connected to the rotary valve.

Description

Technical Field

[0001] The invention belongs to the technical field of oxidative incineration of organic waste gas, and in particular relates to a rotary regenerative oxidative incinerator with high-temperature reverse baking. Background Art

[0002] Since the large-scale application of industrial production, air pollution has become more and more serious. Some of the gaseous harmful substances in the air are volatile organic compounds (abbreviated as VOC or VOC s The emission of such harmful substances in the air is increasingly strictly controlled by the environmental protection department, and the emission limits are set, and they are becoming more and more stringent. The rotary regenerative oxidation incinerator uses the principle that volatile organic waste gas reacts with oxygen in the air at above 750°C to produce CO2 and H2O, decomposing VOCs. s A kind of equipment. The rotary regenerative thermal oxidation incinerator equipment is mainly divided into three parts: the upper part is the VOCs oxidation combustion zone, the middle part is the heat storage zone for storing heat, and the lower part is the exhaust gas rotation distribution zone. The upper part is called the combustion chamber of the regenerative thermal oxidation incinerator. When the regenerative thermal oxidation incinerator equipment is in operation, the normal temperature of the internal gas is within the range of 750℃ to 850℃. The heat storage zone in the middle is mainly used to recover the heat of the high-temperature gas after oxidation combustion and use it to heat new VOCs gas, so as to achieve the purpose of heat storage and energy saving. The distribution zone uses a rotary valve to distribute the exhaust gas and the purified gas.

[0003] As a kind of equipment for treating organic waste gas, the rotary thermal storage oxidation incinerator has been increasingly widely used in many industries. During the operation of the rotary thermal storage oxidation incinerator, since the heat from the combustion zone is not easy to reach the bottom of the thermal storage zone, the temperature at the bottom of the thermal storage zone and in the rotary valve is relatively low, so tar, oil smoke, high boiling point and other easily condensed VOCs waste gases will accumulate at the bottom of the thermal storage and in the rotary valve, causing the internal aperture of the ceramic thermal storage brick to become smaller and blocked, and the exhaust gas distribution of the rotary valve to be unsmooth, resulting in a decrease in the thermal storage efficiency of the equipment, an increase in energy consumption, and a decrease in purification efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a rotary thermal storage oxidation incinerator with high-temperature back-baking, which removes VOCs accumulation at the bottom of the thermal storage area and in the rotary valve by heating with high-temperature gas, thereby solving the problem of accumulation of easily condensed VOCs waste gas at the bottom of the thermal storage area and in the rotary valve in the existing rotary thermal storage oxidation incinerator.

[0005] To solve the above problems, the present invention discloses a rotary heat storage oxidation incinerator with high-temperature back-baking, a furnace body, the upper part of the furnace body is a combustion zone, and the lower part is a heat storage zone, the heat storage zone is formed by splicing a plurality of ceramic heat storage zones, a rotary valve is arranged at the bottom of the furnace body, a plurality of partitions are arranged in the rotary valve, each of the partitions is connected with the corresponding ceramic heat storage zone through piping, a distribution air valve is arranged in the piping, a bypass elbow is arranged on the side of each of the piping, a bypass ball valve is arranged at the bottom of the bypass elbow, a bypass air valve is arranged in the upper section of the bypass elbow, the upper end of each bypass elbow is connected to a bypass exhaust pipe, the bypass exhaust pipe is connected to a chimney, a high-temperature top elbow is arranged on the top of the furnace body, the high-temperature top elbow is connected to the chimney through a high-temperature straight pipe, an over-temperature discharge valve is arranged in the high-temperature straight pipe, a combustion mechanism is connected to the combustion zone, and a heat purge mechanism is connected to the rotary valve.

[0006] The technical solution of the present invention also has the following characteristics:

[0007] The combustion mechanism comprises a burner, the inlet of the burner is connected to a combustion-supporting fan, the outlet of the burner is connected to a burner, and the burner extends from the outer wall of the furnace body into the combustion zone.

[0008] The heat purge mechanism comprises an electric heater, the inlet of the electric heater is connected to a purge fan, and the outlet of the electric heater is connected to the inlet of the rotary valve.

[0009] An inclined plate is arranged at the bottom of the rotary valve, and a valve bottom ball valve is arranged at the lowermost end of the inclined plate.

[0010] The heat storage area is formed by splicing eight ceramic heat storage areas.

[0011] The rotary valve contains eight zones.

[0012] Compared with the prior art, the rotary thermal storage oxidation incinerator with high-temperature back-baking of the present invention adopts high-temperature gas back-baking to the bottom of the thermal storage area and the inside of the rotary valve, effectively removing VOCs accumulation at the bottom of the thermal storage area and the rotary valve, making the rotary thermal storage oxidation incinerator more stable and reliable in operation, making up for the functional deficiencies of the rotary RTO on the existing market, being suitable for complex exhaust gas working conditions, and being suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0014] Figure 1 It is a structural schematic diagram of a rotary thermal storage oxidation incinerator with high-temperature reverse baking according to the present invention;

[0015] Figure 2 yes Figure 1 Side view of

[0016] Figure 3 yes Figure 1 Top view of the .

[0017] In the figure: 1. combustion-supporting fan, 2. purge fan, 3. combustion-supporting pipeline, 4. burner, 5. burner, 6. high-temperature top elbow, 7. combustion zone, 8. heat storage zone, 9. over-temperature discharge valve, 10. electric heater, 11. bypass elbow, 12. piping, 13. high-temperature straight pipe, 14. chimney, 15. bypass exhaust duct, 16. rotary valve, 17. inclined bottom plate, 18. valve bottom ball valve, A1~A8 are eight bypass air valves 1~8, B1~B8 are eight distribution air valves, C1~C8 are eight ceramic heat storage zones, and Q1~Q8 are eight bypass ball valves. DETAILED DESCRIPTION

[0018] The following will describe the implementation methods of the present invention in detail with reference to the embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0019] like Figure 1 As shown, the present invention is a rotary regenerative heat oxidation incinerator with high-temperature back-baking, comprising a furnace body, an upper combustion zone 7 and a lower regenerative zone 8 arranged in the furnace body, and a rotary valve 16. The outer side of the combustion zone 7 is connected to the burner 5, and the burner 5, the burner 4, the combustion-supporting pipeline 3, and the combustion-supporting fan 1 are connected in sequence. A high-temperature top bent pipe 6 is provided on the top of the combustion zone 7. The high-temperature top bent pipe 6 and the high-temperature straight pipe 13 are connected to the chimney 14, and an over-temperature discharge valve 9 is installed in the high-temperature top bent pipe 6.

[0020] Combination Figure 2 and Figure 3 , the heat storage area 7 is divided into eight ceramic heat storage areas, namely Figure 3 C1 to C8 on the top, each ceramic heat storage area is connected to each partition of the rotary valve 16 through each distribution pipe 12, the external air inlet of the rotary valve 16 is connected to the electric heater 10, and the other side of the electric heater 10 is connected to the purge fan 2. A distribution air valve is provided at the bottom of each distribution pipe 12, that is, Figure 2 and Figure 3 B1 to B8 are marked on the top, and the outer openings of the middle and upper parts of the distribution pipes 12 are used to install the bypass elbows 11. Each bypass elbow 11 has a low-position port design, and a corresponding bypass ball valve is installed at the low-position port position, that is, Figure 2 and Figure 3 Q1 to Q8 are marked on the top. Figure 2 As shown, each bypass elbow 11 is vertically installed with bypass vent valves A1 to A8.

[0021] like Figure 2 , Figure 3As shown, the bypass air valves A1 to A8 are connected to the bypass exhaust pipe 15 through pipelines, the bypass exhaust pipe 15 is connected to the chimney 14, and an inclined bottom plate 17 is provided at the bottom of the rotary valve 16, and a valve bottom ball valve 18 is installed at the low point of the inclined bottom plate 17.

[0022] like Figure 1 As shown, the rotary regenerative oxidation incinerator with high temperature reverse baking of the present invention, when reverse baking the regenerative zone 8, works according to the following steps:

[0023] Step 1: shut down the exhaust gas introduction system (external) and the purge fan 2, keep the electric heater 10 in a closed state, keep the combustion-supporting fan 1 in an open state, the combustion-supporting fan 1 provides air volume through the combustion-supporting pipeline 3, and the burner 4 remains open to provide heat through the burner 5;

[0024] Step 2: Close the distribution air valves B1 to B8 to prevent the high-temperature gas in the combustion zone 7 from flowing into the rotary valve 16;

[0025] Step 3: Open the bypass vent valve A1, and keep the bypass vent valves A2 to A8 closed, so that the high temperature gas in the combustion zone 7 passes through the bottom of the ceramic heat storage zone C1, and flows through the distribution pipe 12, the bypass elbow 11, the bypass vent valve A1, and the bypass exhaust pipe 15 in sequence and is discharged to the chimney. Figure 1 The solid line gas flow direction is shown;

[0026] Step 4: After baking for a period of time according to steps 1, 2, and 3, due to the condensation between the bypass elbow 11 and the external air, VOCs accumulation will be collected at the low-level port of the bypass elbow 11. At this time, the bypass ball valve Q1 is opened to discharge the VOCs accumulation. After emptying, the bypass ball valve Q1 is closed;

[0027] Step 5: Similarly, repeat the above steps 2, 3, and 4 to complete the reverse baking of the ceramic heat storage areas C2 to C8 in sequence.

[0028] like Figure 1 As shown, in the rotary regenerative thermal oxidation incinerator with high temperature back-baking of the present invention, when back-baking the rotary valve 16, the following steps are implemented:

[0029] Step 1: shut down the RTO exhaust gas introduction system, the combustion-supporting fan 1 and the burner 4, keep the purge fan 2 turned on to provide air volume, and turn on the electric heater 10 to provide heat;

[0030] Step 2: Open the over-temperature discharge valve 9 at the top of the combustion zone 7, keep the distribution air valve B8 open, close the distribution air valves B1-B7, keep the bypass air valves A1-A8 closed, and let the high-temperature gas from the electric heater 10 flow through the rotary valve 16, the distribution air valve B8, the ceramic heat storage zone C8, the combustion zone 7, the high-temperature top elbow 6, the over-temperature discharge valve 9, and the high-temperature straight pipe 13 to be discharged to the chimney 14. Figure 1 The dotted gas flow direction is shown;

[0031] Step 3: After a period of back-baking according to step 2, the VOCs accumulation in the rotary valve 16 is heated and melted and collected on the inclined bottom plate 17, and the valve bottom ball valve 18 is opened to discharge the VOCs accumulation;

[0032] Step 4: Repeat similar operations in steps 2 and 3 to complete the back-baking of all partitions of the rotary valve 16. After the oil and dirt on the inclined bottom plate 17 are drained, close the bottom ball valve 18, the purge fan 2 and the electric heater 10.

[0033] Obviously, compared with the prior art, the rotary thermal storage oxidation incinerator with high-temperature back-baking of the present invention adopts high-temperature gas back-baking to the bottom of the thermal storage area and the inside of the rotary valve, which effectively removes the VOCs accumulation at the bottom of the thermal storage area and the rotary valve, making the rotary thermal storage oxidation incinerator more stable and reliable in operation, making up for the functional deficiencies of the rotary RTO on the existing market, suitable for complex exhaust gas conditions, and suitable for large-scale promotion.

[0034] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art shall be within the scope of protection of the claims attached to the invention without departing from the spirit and scope of the invention.

Claims

1. A rotary regenerative oxidation incinerator with high temperature reverse baking, characterized in that: A furnace body, wherein the upper part of the furnace body is a combustion zone (7), and the lower part is a heat storage zone (8), wherein the heat storage zone (8) is formed by splicing a plurality of ceramic heat storage zones, a rotary valve (16) is arranged below the furnace body, a plurality of partitions are arranged inside the rotary valve (16), each of the partitions is connected to a corresponding ceramic heat storage zone via a pipe (12), a distribution air valve is arranged inside the pipe (12), a bypass elbow (11) is arranged on the side of each pipe (12), a bypass ball valve is arranged at the bottom of the bypass elbow (11), a bypass air valve is arranged in the upper section of the bypass elbow (11), the upper end of each bypass elbow (11) is connected to a bypass exhaust pipe (15), the bypass exhaust pipe (15) is connected to a chimney (14), and the furnace body A high-temperature top bent pipe (6) is arranged at the top, the high-temperature top bent pipe (6) is connected to the chimney (14) through a high-temperature straight pipe (13), an over-temperature discharge valve (9) is arranged in the high-temperature straight pipe (13), the combustion zone (7) is externally connected to a combustion mechanism, and the rotary valve (16) is externally connected to a heat purge mechanism; the combustion mechanism comprises a burner (4), the inlet of the burner (4) is connected to a combustion-supporting fan (1), the outlet of the burner (4) is connected to a burner (5), and the burner (5) extends from the outer wall of the furnace body into the combustion zone (7); the heat purge mechanism comprises an electric heater (10), the inlet of the electric heater (10) is connected to a purge fan (2), and the outlet of the electric heater (10) is connected to the inlet of the rotary valve (16).

2. The rotary regenerative thermal oxidation incinerator with high temperature reverse baking as claimed in claim 1, characterized in that: An inclined plate (17) is provided at the bottom of the rotary valve (16), and a valve bottom ball valve (18) is provided at the lowermost end of the inclined plate (17).

3. The rotary regenerative thermal oxidation incinerator with high temperature reverse baking as claimed in claim 1, characterized in that: The heat storage area (8) is formed by splicing eight ceramic heat storage areas.

4. The rotary regenerative thermal oxidation incinerator with high temperature reverse baking as claimed in claim 3, characterized in that: The rotary valve (16) comprises eight partitions.

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