All-electric destruction system and destruction process of explosive and flammable dangerous goods

Abstract

The present invention discloses a fully electric destruction system for explosive hazardous materials and its destruction process. An electric heating rod is arranged in the second combustion chamber, and the electric heating rod is made of silicon carbon rod. The second combustion chamber is connected to the first combustion chamber through a smoke return pipe, and a return fan is arranged on the smoke return pipe. The second combustion chamber is connected to a smoke outlet pipe, and a smoke outlet fan is arranged on the smoke outlet pipe, and the smoke outlet pipe is connected to a subsequent exhaust gas treatment mechanism; the control system includes a PLC controller, a temperature controller, a No. 1 temperature sensor, a No. 2 temperature sensor, a pressure transmitter, and a smoke gate valve. The No. 1 temperature sensor is arranged in the first combustion chamber, the No. 2 temperature sensor and the pressure transmitter are arranged at the outlet of the second combustion chamber, and the smoke gate valve is arranged on the smoke outlet pipe. The temperature controller is connected to the electric heating rod through a line, and the PLC controller is respectively connected to the temperature controller, the No. 1 temperature sensor, the No. 2 temperature sensor, the pressure transmitter, the smoke gate valve, the return fan, and the smoke outlet fan through the line.

Description

Technical Field

[0001] The present invention belongs to the technical field of explosion of dangerous goods, and in particular relates to a full-electric destruction system for explosion of dangerous goods and a destruction process thereof. Background Art

[0002] In recent years, the Chinese government has attached great importance to the development of a low-carbon, environmentally friendly economy, requiring that while ensuring economic development, energy conservation, reduction of internal consumption, and alleviation of energy shortages, greenhouse effects, environmental degradation and other issues should be addressed. Against this background, energy conservation and environmental protection have become important aspects of future development, and the utilization of temperature after incineration has gained widespread attention as an effective way and method. How to effectively recycle and utilize the waste heat of the high-temperature flue gas emitted after secondary combustion in the existing hazardous waste incineration technology has always been a technical issue that needs to be improved. In addition, when the burner in the incinerator burns diesel, a large amount of air needs to be introduced to assist combustion. During the combustion process, a large amount of mixed gas of smoke and pollutants will be generated, which increases exhaust gas emissions and increases fuel consumption.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The purpose of the present invention is to provide a fully electric destruction system and a destruction process for explosive and flammable dangerous goods, thereby overcoming the defects in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a fully electric destruction system for explosive hazardous materials, comprising: a first combustion chamber, a second combustion chamber, a smoke inlet pipe, an electric heating rod, a smoke return pipe, a return fan, a smoke outlet pipe, a smoke outlet fan, and a control system; the first combustion chamber is connected to the second combustion chamber through the smoke inlet pipe, the second combustion chamber is provided with an electric heating rod, the electric heating rod is made of silicon carbon rod, the second combustion chamber is connected to the first combustion chamber through the smoke return pipe, the smoke return pipe is provided with a return fan, the second combustion chamber is connected to the smoke outlet pipe, the smoke outlet pipe is provided with a smoke outlet fan, and the smoke outlet pipe It is connected to the subsequent exhaust gas treatment mechanism; the control system includes a PLC controller, a temperature controller, a No. 1 temperature sensor, a No. 2 temperature sensor, a pressure transmitter, and a flue gas gate valve. The No. 1 temperature sensor is arranged in the first combustion chamber, the No. 2 temperature sensor and the pressure transmitter are arranged at the outlet of the second combustion chamber, the flue gas gate valve is arranged on the smoke outlet pipe, the temperature controller is connected to the electric heating rod through a line, and the PLC controller is respectively connected to the temperature controller, the No. 1 temperature sensor, the No. 2 temperature sensor, the pressure transmitter, the flue gas gate valve, the return fan, and the smoke outlet fan through lines.

[0006] Preferably, in the technical solution, the control system also includes an oxygen concentration detector and an air make-up valve. The oxygen concentration detector is arranged at the outlet of the secondary combustion chamber, and the air make-up valve is arranged on the flue gas return pipe. The PLC controller is connected to the oxygen concentration detector and the air make-up valve respectively through lines.

[0007] Preferably, in the technical solution, the PLC controller is a Siemens S7-1200 controller.

[0008] Preferably, in the technical solution, a combustion chamber is a rotary kiln.

[0009] Preferably, in the technical solution, a combustion chamber is a vertical kiln.

[0010] A destruction process of a fully electric destruction system for explosive hazardous materials, the steps of which are: (1) closing the smoke valve, starting the electric heating rod, and heating the temperature inside the secondary combustion chamber to 500°C;

[0011] (2) Start the return fan, and the 500°C hot air in the second combustion chamber will flow back to the first combustion chamber through the flue gas return pipe, and heat the first combustion chamber to 500°C simultaneously;

[0012] (3) Based on the temperature data in the second combustion chamber detected by the second temperature sensor, the temperature controller controls the electric heating rod to heat up the second combustion chamber to 1200°C. The hot air flows back to the first combustion chamber through the flue gas return pipe, gradually heating the first combustion chamber to 700-850°C.

[0013] (4) Open the flue gas valve and feed the explosive and flammable dangerous goods into the first combustion chamber. At a high temperature of 700-850℃, the explosive and flammable dangerous goods burn and explode, and the high-temperature flue gas generated enters the second combustion chamber through the flue gas inlet pipe;

[0014] (5) The high-temperature flue gas is fully burned at a high temperature of 1200°C. After the unburned particulate matter and organic matter in the flue gas are completely burned, the high-temperature flue gas reaches the outlet of the second combustion chamber. According to the temperature in the first combustion chamber detected by the No. 1 temperature sensor, the return fan air volume is controlled to adjust the amount of flue gas entering the flue gas return pipe;

[0015] (6) According to the gas pressure at the outlet of the secondary combustion chamber detected by the pressure transmitter, the air volume of the smoke exhaust fan is controlled, and the amount of smoke entering the smoke exhaust pipe is adjusted. The high-temperature smoke is discharged into the subsequent exhaust gas treatment mechanism through the smoke exhaust pipe.

[0016] Preferably, in the technical solution, in step (5), the oxygen content at the outlet of the second combustion chamber is detected by the oxygen concentration detector, the air supply valve is controlled to open and close, the air supply volume of the first combustion chamber is adjusted, and the oxygen content of the second combustion chamber is maintained.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The harmful flue gas generated by the destruction in the first combustion chamber is fully oxidized at high temperature by the electric heating rod in the second combustion chamber. A part of the high-temperature flue gas generated is directly forced to flow back to the first combustion chamber as direct heat energy to meet the heat energy demand for destroying explosive waste. The rated temperature of the first combustion chamber can be set according to the type of explosive waste to be destroyed. Through the control system, the temperature of the first combustion chamber, the temperature of the second combustion chamber, the power of the electric heating rod, the amount of refluxed flue gas, the amount of exhaust, and the real-time power of the fan can be dynamically balanced, which can greatly reduce energy consumption. After the gas burner is cancelled, the emission of harmful gases and carbon is directly and greatly reduced, which meets the requirements of green environmental protection destruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the all-electric destruction system for explosive and flammable dangerous goods of the present invention;

[0020] Figure 2 This is a control principle block diagram of the control system of the present invention;

[0021] The accompanying drawings are marked as: 1-first combustion chamber, 2-second combustion chamber, 3-smoke inlet pipe, 4-electric heating rod, 5-smoke return pipe, 6-return fan, 7-smoke outlet pipe, 8-smoke outlet fan, 9-PLC controller, 10-temperature controller, 11-No. 1 temperature sensor, 12-No. 2 temperature sensor, 13-pressure transmitter, 14-smoke gate valve, 15-oxygen concentration detector, 16-air supply valve, 17-exhaust gas treatment mechanism. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0023] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0024] like Figure 1-2As shown, a fully electric destruction system for explosive hazardous materials includes: a combustion chamber 1, a second combustion chamber 2, a smoke inlet pipe 3, an electric heating rod 4, a smoke return pipe 5, a return fan 6, a smoke outlet pipe 7, a smoke outlet fan 8, and a control system; the first combustion chamber 1 is a vertical kiln, the first combustion chamber 1 is connected to the second combustion chamber 2 through the smoke inlet pipe 3, the second combustion chamber 2 is provided with an electric heating rod 4, the electric heating rod 4 is made of silicon carbon rod, the second combustion chamber 2 is connected to the first combustion chamber 1 through the smoke return pipe 5, the smoke return pipe 5 is provided with a return fan 6, the second combustion chamber 2 is connected to the smoke outlet pipe 7, the smoke outlet pipe 7 is provided with a smoke outlet fan 8, and the smoke outlet pipe 7 is connected to the subsequent exhaust gas treatment mechanism 17; the control system includes a PLC controller 9, a temperature controller 10, a first temperature sensor 11, a second temperature sensor The PLC controller 9 is a Siemens S7-1200 controller. The No. 1 temperature sensor 11 is arranged in the first combustion chamber 1, the No. 2 temperature sensor 12, the pressure transmitter 13, the smoke gate valve 14, the oxygen concentration detector 15, and the air make-up valve 16. The PLC controller 9 uses a Siemens S7-1200 controller. The No. 1 temperature sensor 11 is arranged in the first combustion chamber 1, the No. 2 temperature sensor 12, the pressure transmitter 13, the oxygen concentration detector 15 are arranged at the outlet of the second combustion chamber 2, the smoke gate valve 14 is arranged on the smoke outlet duct 7, the temperature controller 10 is connected to the electric heating rod 4 through a line, and the air make-up valve 16 is arranged on the smoke return pipe 5. The PLC controller 9 is respectively connected to the temperature controller 10, the No. 1 temperature sensor 11, the No. 2 temperature sensor 12, the pressure transmitter 13, the smoke gate valve 14, the return fan 6, the smoke outlet fan 8, the oxygen concentration detector 15, and the air make-up valve 16 through lines.

[0025] A destruction process of a fully electric destruction system for explosive hazardous materials, the steps of which are: (1) closing the smoke gate valve 14, starting the electric heating rod 4, and heating the temperature in the secondary combustion chamber 2 to 500°C;

[0026] (2) Start the return fan 6, and the 500°C hot air in the second combustion chamber 2 flows back to the first combustion chamber 1 through the flue gas return pipe 5, and heats the first combustion chamber 1 to 500°C simultaneously;

[0027] (3) Based on the temperature data in the second combustion chamber 2 detected by the second temperature sensor 12, the temperature controller 10 controls the electric heating rod 4 to increase the temperature, heating the second combustion chamber 2 to 1200°C, and the hot air flows back to the first combustion chamber 1 through the flue gas return pipe 5, gradually heating the first combustion chamber 1 to 850°C;

[0028] (4) Open the flue gas valve 14 and feed the explosive and flammable dangerous goods into the first combustion chamber 1. At a high temperature of 850°C, the explosive and flammable dangerous goods burn and explode, and the high-temperature flue gas generated enters the second combustion chamber 2 through the flue gas inlet pipe 3;

[0029] (5) The high-temperature flue gas is fully burned at a high temperature of 1200°C. After the unburned particulate matter and organic matter in the flue gas are completely burned, the high-temperature flue gas reaches the outlet of the secondary combustion chamber 2. According to the temperature in the primary combustion chamber 1 detected by the No. 1 temperature sensor 11, the air volume of the return fan 6 is controlled to adjust the amount of flue gas entering the flue gas return pipe 5;

[0030] (6) The gas pressure at the outlet of the secondary combustion chamber 2 is detected by the pressure transmitter 13, the air volume of the smoke exhaust fan 8 is controlled, and the amount of smoke entering the smoke exhaust pipe 7 is adjusted. The high-temperature smoke is discharged into the subsequent exhaust gas treatment mechanism 17 through the smoke exhaust pipe 7; the oxygen content at the outlet of the secondary combustion chamber 2 is detected by the oxygen concentration detector 15, the air supply valve 16 is controlled to open and close, and the air supply volume of the first combustion chamber 1 is adjusted to maintain the oxygen content of the secondary combustion chamber 2.

[0031] The second combustion chamber 2 uses the electric heating rod 4 to fully oxidize the harmful flue gas generated by the first combustion chamber 1. A part of the high-temperature flue gas generated is directly forced to flow back to the first combustion chamber 1 as direct heat energy to meet the heat energy demand for destroying explosive waste. The rated temperature of the first combustion chamber 1 can be set according to the type of explosive waste to be destroyed. Through the control system, the temperature of the first combustion chamber 1, the temperature of the second combustion chamber 2, the power of the electric heating rod 4, the amount of refluxed flue gas, the amount of exhaust, the amount of supplementary air, and the real-time power of the fan are dynamically balanced, which can greatly reduce energy consumption. After the gas burner is cancelled, the emission of harmful gases and carbon is directly and greatly reduced, which meets the requirements of green environmental protection destruction.

[0032] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A destruction process of an all-electric destruction system for explosive and flammable dangerous goods, characterized by: The invention comprises a first combustion chamber, a second combustion chamber, a smoke inlet pipe, an electric heating rod, a smoke return pipe, a return fan, a smoke outlet pipe, a smoke outlet fan and a control system; the first combustion chamber is connected to the second combustion chamber through the smoke inlet pipe, the second combustion chamber is provided with an electric heating rod, the electric heating rod is made of silicon carbon rod, the second combustion chamber is connected to the first combustion chamber through the smoke return pipe, the smoke return pipe is provided with a return fan, the second combustion chamber is connected to the smoke outlet pipe, the smoke outlet pipe is provided with a smoke outlet fan, and the smoke outlet pipe is connected to the subsequent exhaust gas treatment mechanism; the control The control system includes a PLC controller, a temperature controller, a No. 1 temperature sensor, a No. 2 temperature sensor, a pressure transmitter, and a flue gas valve. The No. 1 temperature sensor is arranged in the first combustion chamber, the No. 2 temperature sensor and the pressure transmitter are arranged at the outlet of the second combustion chamber, and the flue gas valve is arranged on the smoke outlet pipe. The temperature controller is connected to the electric heating rod through a line, and the PLC controller is respectively connected to the temperature controller, the No. 1 temperature sensor, the No. 2 temperature sensor, the pressure transmitter, the flue gas valve, the return fan, and the smoke outlet fan through the line; The steps are as follows: (1) close the flue gas valve, start the electric heating rod, and heat the temperature inside the secondary combustion chamber to 500°C; (2) Start the return fan, and the 500°C hot air in the second combustion chamber will flow back to the first combustion chamber through the flue gas return pipe, and heat the first combustion chamber to 500°C simultaneously; (3) Based on the temperature data in the second combustion chamber detected by the second temperature sensor, the temperature controller controls the electric heating rod to heat up the second combustion chamber to 1200°C. The hot air flows back to the first combustion chamber through the flue gas return pipe, gradually heating the first combustion chamber to 700-850°C. (4) Open the flue gas valve and feed the explosive and flammable dangerous goods into the first combustion chamber. At a high temperature of 700-850℃, the explosive and flammable dangerous goods burn and explode, and the high-temperature flue gas generated enters the second combustion chamber through the flue gas inlet pipe; (5) The high-temperature flue gas is fully burned at a high temperature of 1200°C. After the unburned particulate matter and organic matter in the flue gas are completely burned, the high-temperature flue gas reaches the outlet of the second combustion chamber. According to the temperature in the first combustion chamber detected by the No. 1 temperature sensor, the return fan air volume is controlled to adjust the amount of flue gas entering the flue gas return pipe; (6) According to the gas pressure at the outlet of the secondary combustion chamber detected by the pressure transmitter, the air volume of the smoke exhaust fan is controlled, and the amount of smoke entering the smoke exhaust pipe is adjusted. The high-temperature smoke is discharged into the subsequent exhaust gas treatment mechanism through the smoke exhaust pipe.

2. The destruction process of the all-electric destruction system for explosive and flammable dangerous goods according to claim 1 is characterized by: The control system also includes an oxygen concentration detector and an air replenishment valve. The oxygen concentration detector is arranged at the outlet of the secondary combustion chamber, and the air replenishment valve is arranged on the flue gas return pipe. The PLC controller is connected to the oxygen concentration detector and the air replenishment valve through lines respectively.

3. The destruction process of the all-electric destruction system for explosive and flammable dangerous goods according to claim 1 is characterized by: The PLC controller is Siemens S7-1200 controller.

4. The destruction process of the all-electric destruction system for explosive and flammable dangerous goods according to claim 1 is characterized by: One combustion chamber is a vertical kiln.

5. The destruction process of the all-electric destruction system for explosive and flammable dangerous goods according to claim 1 is characterized by: One combustion chamber is a rotary kiln.

6. The destruction process of the all-electric destruction system for explosive and flammable dangerous goods according to claim 1 is characterized by: In step (5), the oxygen content at the outlet of the second combustion chamber is detected by the oxygen concentration detector, and the opening and closing of the air supply valve is controlled to adjust the air supply volume of the first combustion chamber to maintain the oxygen content of the second combustion chamber.

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