A safety early warning protection system for furnace working conditions of explosive hazardous materials incineration and destruction system

Abstract

The present invention discloses a furnace working condition safety early warning protection system for an incineration and destruction system of explosive hazardous materials. A feeding port and a discharge cylinder are provided on a feeding rack, a discharge gate is provided at the connection between the feeding port and the material pipe, the material pipe is connected to the furnace body, the output end of the discharge cylinder is connected to the discharge gate, a discharge in place signal switch is provided on the feeding rack on one side of the discharge gate, a contact is provided on the discharge gate, and the discharge in place signal switch is located on the moving track of the contact; the burner is connected to the furnace body through a flame channel, a gas collecting hood is provided on the top of the furnace body, the gas collecting hood is connected to the air duct, and a fan is provided on the air duct; a pressure transmitter and a temperature transmitter are respectively provided on the furnace body; the input end of the PLC controller is respectively connected to the pressure transmitter, the temperature transmitter, and the discharge in place signal switch through a line, and the output end of the PLC controller is respectively connected to the burner, the discharge cylinder, the fan, and the motor through a line. The present invention improves the explosion resistance of the furnace body.

Description

Technical field:

[0001] The invention belongs to the technical field of explosive hazardous material destruction furnaces, and in particular relates to a furnace operating condition safety early warning protection system for an explosive hazardous material incineration and destruction system. Background technology:

[0002] Dangerous explosives include propellants, propellants, pyrotechnics, explosives, pyrotechnics, fuses, bullets, artillery shells and missiles, as well as civilian explosives, detonators, detonating cords, airbags, etc. During the development, testing, production, storage and use of these explosive dangerous goods, due to various reasons such as imperfect production technology management, unreasonable storage management, elimination due to technological progress or exceeding the service life, a certain amount of residual, waste, old products and some other derived explosive waste products will inevitably be produced. These explosive waste products must be destroyed safely and reliably in a timely manner. At present, in China, most units still burn them in the open air in the suburbs, and a few units use incinerators for destruction, but there is a lack of monitoring of the temperature and pressure in the incinerator, and the safety measures are poor.

[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 furnace operating condition safety warning protection system for an incineration and destruction system of explosive and dangerous goods, thereby overcoming the defects in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a furnace working condition safety early warning protection system for the incineration and destruction system of explosive and dangerous goods, comprising: a feeding device, a burner, a furnace body, a pressure transmitter, a temperature transmitter, an air collecting hood, an air duct, a fan, a slag discharge device, and a PLC controller; the feeding device comprises a feeding rack, a feeding port, a discharging gate, a discharging cylinder, a discharging in place signal switch, and a material pipe; the feeding rack is provided with a feeding port and a discharging cylinder, a discharging gate is provided at the connection between the feeding port and the material pipe, the material pipe is connected to the furnace body, the output end of the discharging cylinder is connected to the discharging gate, a discharging in place signal switch is provided on the feeding rack on one side of the discharging gate, and a contact is provided on the discharging gate. The switch is located on the moving track of the contact; the burner is connected to the furnace body through the flame channel, and an air collecting hood is arranged on the top of the furnace body, which is connected to the air duct, and a fan is arranged on the air duct; the slag discharge device includes a slag discharge door, a motor, a rotating shaft, and a rocker arm. The slag discharge door is arranged at the bottom of the furnace body, and the two sides of the slag discharge door are respectively connected to the rocker arm, the rocker arm is connected to the rotating shaft, and the rotating shaft is connected to the motor through a coupling; a pressure transmitter and a temperature transmitter are respectively arranged on the furnace body; the input end of the PLC controller is respectively connected to the pressure transmitter, the temperature transmitter, and the discharge in place signal switch through the line, and the output end of the PLC controller is respectively connected to the burner, the discharge cylinder, the fan, and the motor through the line.

[0006] Preferably, in the technical solution, the PLC controller is a Siemens S7-1200 controller.

[0007] Preferably, in the technical solution, the pressure transmitter uses the explosion-proof type PB8103CdM1H / J, and the detection pressure range is -1KPa-10MPa.

[0008] Preferably, in the technical solution, the temperature transmitter uses an explosion-proof HGWR216PW / K240dK thermocouple with a detection temperature range of 0-1100°C.

[0009] Preferably, in the technical solution, the pressure transmitter and the temperature transmitter are respectively provided with a water-cooling jacket, and the water-cooling jacket is provided with a water inlet and a water outlet.

[0010] Preferably, in the technical solution, the feeding device also includes an isolation gate, an isolation cylinder, and an isolation in place signal switch. The isolation cylinder is arranged on the feeding rack, and the output end of the isolation cylinder is connected to the isolation gate. The isolation gate is located between the feeding port and the discharge gate. An isolation in place signal switch is arranged on one side of the isolation gate. Contacts are arranged on the isolation gate, and the isolation in place signal switch is located on the moving track of the contacts. The isolation in place signal switch is connected to the input end of the PLC controller through a line, and the isolation cylinder is connected to the output end of the PLC controller through a line.

[0011] A working method of a furnace working condition safety early warning protection system for an incineration and destruction system of explosive and dangerous goods, the steps of which are as follows: (1) the explosive and dangerous goods are fed into a feeding port, a PLC controller controls an isolation cylinder to start, and drives an isolation gate to open; when the opening contact of the isolation gate contacts an isolation in place signal switch, the isolation in place signal switch transmits an opening signal to the PLC controller, the PLC controller controls the isolation cylinder to stop, and the explosive and dangerous goods fall between the isolation gate and the discharge gate, and at the same time the PLC controller controls the burner to start;

[0012] (2) When the explosive and flammable dangerous goods are put into the furnace, the PLC controller controls the isolation cylinder to reset. When the closing contact of the isolation gate contacts the isolation in place signal switch, the isolation in place signal switch transmits the closing signal to the PLC controller, and the isolation gate is closed; the PLC controller controls the discharge cylinder to start, driving the discharge gate to open, and the explosive and flammable dangerous goods fall into the furnace body. When the opening contact of the discharge gate contacts the discharge in place signal switch, the discharge in place signal switch transmits the opening signal to the PLC controller. The PLC controller controls the discharge cylinder to reset. When the closing contact of the discharge gate contacts the discharge in place signal switch, the discharge in place signal switch transmits the closing signal to the PLC controller, and the discharge gate is closed.

[0013] (3) The explosive hazardous materials are ignited and burned by the flame in the furnace. The pressure transmitter detects whether the gas pressure change in the furnace is greater than 500Pa, and the temperature transmitter detects whether the temperature in the furnace is between the set temperature of 300℃ and 900℃. The pressure transmitter and the temperature transmitter send the detected data to the PLC controller, and the PLC controller controls according to the detection data;

[0014] (4) When the gas pressure change in the furnace body is greater than 500 Pa and the temperature in the furnace body is between 300° C. and 900° C., the steps (1) to (3) are repeated;

[0015] (5) When the pressure change of the gas in the furnace is less than 500Pa, the second feeding is carried out, and the steps are the same as (1)-(3); when the pressure change of the gas in the furnace is still less than 500Pa after the second feeding, the feeding is stopped, and the burner is kept on to continuously burn the explosive and dangerous goods in the furnace until the pressure transmitter detects that the pressure change of the gas in the furnace is greater than 500Pa. The furnace continues to burn for five minutes to ensure that the explosive and dangerous goods in the furnace are fully burned, and then the steps (1)-(3) are repeated;

[0016] (6) When the temperature inside the furnace body is lower than 300°C, the burner is kept burning to make the temperature inside the furnace body reach the set range; when the temperature inside the furnace body is higher than 900°C, the temperature transmitter sends the detected data to the PLC controller, and the PLC controller turns off the burner and turns on the fan at the same time. The fan blows cold air from the air duct through the air collecting hood into the furnace body to cool the furnace body and reduce the temperature inside the furnace body to the set range, and then the steps (1)-(3) are repeated;

[0017] (7) After the explosive hazardous materials are handled, the PLC controller turns off the burner and turns on the motor. The motor drives the shaft to rotate, and the rocker arm swings to open the slag discharge door, and the slag in the furnace body is discharged from the slag discharge door.

[0018] Preferably, in the technical solution, in step (2), when the PLC controller does not receive the shutdown signal sent by the material discharge signal switch, it continues to wait for the shutdown signal. When the shutdown signal is not received for more than five minutes, the PLC controller shuts down the entire system and performs shutdown maintenance.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By real-time detection of the gas pressure in the furnace, the gas pressure in the furnace is ensured to be within the set range, ensuring that the explosive and dangerous goods are burned completely and that there will be no overexplosion due to accumulation. By real-time detection of the temperature in the furnace, the temperature in the furnace is ensured to be within the set range. Since the higher the temperature, the lower the explosion resistance of the furnace body, the explosion resistance of the furnace body is improved. Description of the drawings:

[0021] Figure 1 It is a schematic diagram of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods of the present invention;

[0022] Figure 2 This is a working flow chart of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive hazardous materials of the present invention;

[0023] Figure 3 This is the control principle diagram of the PLC controller of the present invention;

[0024] The accompanying drawings are marked as: 1-feeding device, 2-burner, 3-furnace body, 4-pressure transmitter, 5-temperature transmitter, 6-gas collecting hood, 7-air duct, 8-fan, 9-slag discharge device, 10-PLC controller, 11-feeding rack, 12-feeding port, 13-discharging gate, 14-discharging cylinder, 15-discharging in place signal switch, 16-material pipe, 17-isolating gate, 18-isolating cylinder, 19-isolation in place signal switch, 20-slag discharge door, 21-motor, 22-rotating shaft, 23-rocker arm, 24-water-cooling sleeve, 25-flame channel. Specific implementation method:

[0025] 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.

[0026] 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.

[0027] like Figure 1 As shown, a furnace working condition safety early warning protection system for the incineration and destruction system of explosive hazardous materials includes: a feeding device 1, a burner 2, a furnace body 3, a pressure transmitter 4, a temperature transmitter 5, a gas collecting hood 6, an air duct 7, a fan 8, a slag discharge device 9, and a PLC controller; the feeding device 1 includes a feeding rack 11, a feeding port 12, a discharge gate 13, a discharge cylinder 14, a discharge in place signal switch 15, a material pipe 16, an isolation gate 17, an isolation cylinder 18, and an isolation in place signal switch 1 9, the feeding rack 11 is provided with a feeding port 12, a discharge cylinder 14, and an isolation cylinder 18. A discharge gate 13 is provided at the connection between the feeding port 12 and the material pipe 16. The material pipe 16 is connected to the furnace body 3. The output end of the discharge cylinder 14 is connected to the discharge gate 13. A discharge in place signal switch 15 is provided on the feeding rack 11 on one side of the discharge gate 13. The discharge gate 13 is provided with an opening contact and a closing contact. The discharge in place signal switch 15 is located on the contact moving track. The isolation cylinder 18 is provided The feeding rack 11, the output end of the isolation cylinder 18 is connected to the isolation gate 17, the isolation gate 17 is located between the feeding port 12 and the discharge gate 13, and an isolation in place signal switch 19 is arranged on one side of the isolation gate 17, and an opening contact and a closing contact are arranged on the isolation gate 17, and the isolation in place signal switch 19 is located on the contact movement track; the burner 2 is connected to the furnace body 3 through the flame channel 25, and the top of the furnace body 3 is provided with an air collecting hood 6, and the air collecting hood 6 is connected to the air duct 7, and the air duct 7 is provided with The fan 8; the slag discharge device 9 includes a slag discharge door 20, a motor 21, a rotating shaft 22, and a rocker arm 23. The slag discharge door 20 is arranged at the bottom of the furnace body 3. The two sides of the slag discharge door 20 are respectively connected to the rocker arm 23, the rocker arm 23 is connected to the rotating shaft 22, and the rotating shaft 22 is connected to the motor 21 through a coupling; the furnace body 3 is respectively provided with a pressure transmitter 4 and a temperature transmitter 5. The pressure transmitter 4 and the temperature transmitter 5 are respectively provided with a water-cooling spacer 24, and the water-cooling spacer 24 is provided with a water inlet and a water outlet. The pressure transmitter 4 uses an explosion-proof PB8103CdM1H / J, and the detection pressure range is -1KPa-10MPa. The temperature transmitter 5 uses an explosion-proof HGWR216PW / K240dK thermocouple, and the detection temperature range is 0-1100℃.

[0028] like Figure 3As shown, the PLC controller 10 uses a Siemens S7-1200 controller. The PLC controller 10 includes a CPU, a signal module, and a communication module. The CPU is connected to the signal module and the communication module respectively. The signal module of the PLC controller 10 is connected to the pressure transmitter 4, the temperature transmitter 5, the discharge in place signal switch 15, and the isolation in place signal switch 19 through lines respectively. The communication module of the PLC controller 10 is connected to the burner 2, the discharge cylinder 14, the fan 8, the motor 21, and the isolation cylinder 18 through lines respectively.

[0029] like Figure 2 As shown, a working method of a furnace working condition safety warning protection system of an incineration and destruction system of explosive and dangerous goods, the steps of which are: (1) the explosive and dangerous goods are fed into the material feeding port, and the PLC controller controls the isolation cylinder to start, driving the isolation gate to open. When the opening contact of the isolation gate contacts the isolation in place signal switch, the isolation in place signal switch transmits the opening signal to the PLC controller, and the PLC controller controls the isolation cylinder to stop, and the explosive and dangerous goods fall between the isolation gate and the discharge gate. At the same time, the PLC controller controls the burner to start;

[0030] (2) When the explosive and flammable dangerous goods are put into the furnace, the PLC controller controls the isolation cylinder to reset. When the closing contact of the isolation gate contacts the isolation in place signal switch, the isolation in place signal switch transmits the closing signal to the PLC controller, and the isolation gate is closed; the PLC controller controls the discharge cylinder to start, driving the discharge gate to open, and the explosive and flammable dangerous goods fall into the furnace body. When the opening contact of the discharge gate contacts the discharge in place signal switch, the discharge in place signal switch transmits the opening signal to the PLC controller. The PLC controller controls the discharge cylinder to reset. When the closing contact of the discharge gate contacts the discharge in place signal switch, the discharge in place signal switch transmits the closing signal to the PLC controller, and the discharge gate is closed; when the PLC controller does not receive the closing signal sent by the discharge in place signal switch, it continues to wait for the closing signal. When the closing signal is not received for more than five minutes, the PLC controller shuts down the entire system for maintenance;

[0031] (3) The explosive hazardous materials are ignited and burned by the flame in the furnace. The pressure transmitter detects whether the gas pressure change in the furnace is greater than 500Pa, and the temperature transmitter detects whether the temperature in the furnace is between the set temperature of 300℃ and 900℃. The pressure transmitter and the temperature transmitter send the detected data to the PLC controller, and the PLC controller controls according to the detection data;

[0032] (4) When the gas pressure change in the furnace body is greater than 500 Pa and the temperature in the furnace body is between 300° C. and 900° C., the steps (1) to (3) are repeated;

[0033] (5) When the pressure change of the gas in the furnace is less than 500Pa, the second feeding is carried out, and the steps are the same as (1)-(3); when the pressure change of the gas in the furnace is still less than 500Pa after the second feeding, the feeding is stopped, and the burner is kept on to continuously burn the explosive and dangerous goods in the furnace until the pressure transmitter detects that the pressure change of the gas in the furnace is greater than 500Pa. The furnace continues to burn for five minutes to ensure that the explosive and dangerous goods in the furnace are fully burned, and then the steps (1)-(3) are repeated;

[0034] (6) When the temperature inside the furnace body is lower than 300°C, the burner is kept burning to make the temperature inside the furnace body reach the set range; when the temperature inside the furnace body is higher than 900°C, the temperature transmitter sends the detected data to the PLC controller, and the PLC controller turns off the burner and turns on the fan at the same time. The fan blows cold air from the air duct through the air collecting hood into the furnace body to cool the furnace body and reduce the temperature inside the furnace body to the set range, and then the steps (1)-(3) are repeated;

[0035] (7) After the explosive hazardous materials are handled, the PLC controller turns off the burner and turns on the motor. The motor drives the shaft to rotate, and the rocker arm swings to open the slag discharge door, and the slag in the furnace body is discharged from the slag discharge door.

[0036] 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 working method of a furnace working condition safety early warning protection system for an incineration and destruction system of explosive and dangerous goods, characterized by: It includes a feeding device, a burner, a furnace body, a pressure transmitter, a temperature transmitter, an air hood, an air duct, a fan, a slag discharge device, and a PLC controller; the feeding device includes a feeding rack, a feeding port, a discharge gate, a discharge cylinder, a discharge in place signal switch, and a material pipe. The feeding rack is provided with a feeding port and a discharge cylinder. A discharge gate is provided at the connection between the feeding port and the material pipe. The material pipe is connected to the furnace body, and the output end of the discharge cylinder is connected to the discharge gate. A discharge in place signal switch is provided on the feeding rack on one side of the discharge gate. The discharge gate is provided with contacts, and the discharge in place signal switch is located on the moving track of the contacts; the burner is connected to the furnace body through the fire The flame channel is connected to the furnace body, a gas collecting hood is arranged on the top of the furnace body, the gas collecting hood is connected to the air duct, and a fan is arranged on the air duct; the slag discharge device includes a slag discharge door, a motor, a rotating shaft, and a rocker arm, the slag discharge door is arranged at the bottom of the furnace body, the two sides of the slag discharge door are respectively connected to the rocker arm, the rocker arm is connected to the rotating shaft, and the rotating shaft is connected to the motor through a coupling; a pressure transmitter and a temperature transmitter are respectively arranged on the furnace body; the input end of the PLC controller is respectively connected to the pressure transmitter, the temperature transmitter, and the discharge in place signal switch through the line, and the output end of the PLC controller is respectively connected to the burner, the discharge cylinder, the fan, and the motor through the line; The steps are as follows: (1) dangerous and explosive materials are put into the feeding port, and the PLC controller controls the isolation cylinder to start, driving the isolation gate to open. When the opening contact of the isolation gate contacts the isolation in place signal switch, the isolation in place signal switch transmits the opening signal to the PLC controller, and the PLC controller controls the isolation cylinder to stop, and the dangerous and explosive materials fall between the isolation gate and the discharge gate. At the same time, the PLC controller controls the burner to start; (2) After the explosive and flammable dangerous goods are put into the furnace, the PLC controller controls the isolation cylinder to reset. When the closing contact of the isolation gate contacts the isolation in place signal switch, the isolation in place signal switch transmits the closing signal to the PLC controller, and the isolation gate closes; the PLC controller controls the discharge cylinder to start, driving the discharge gate to open, and the explosive and flammable dangerous goods fall into the furnace body. When the opening contact of the discharge gate contacts the discharge in place signal switch, the discharge in place signal switch transmits the opening signal to the PLC controller. The PLC controller controls the discharge cylinder to reset. When the closing contact of the discharge gate contacts the discharge in place signal switch, the discharge in place signal switch transmits the closing signal to the PLC controller, and the discharge gate closes; (3) The explosive hazardous materials are ignited and burned by the flame in the furnace. The pressure transmitter detects whether the gas pressure change in the furnace is greater than 500Pa, and the temperature transmitter detects whether the temperature in the furnace is between the set temperature of 300℃-900℃. The pressure transmitter and temperature transmitter send the detected data to the PLC controller, and the PLC controller controls according to the detection data; (4) When the gas pressure change in the furnace body is greater than 500 Pa and the temperature in the furnace body is between 300°C and 900°C, repeat steps (1) to (3); (5) When the pressure change of the gas in the furnace is less than 500Pa, the second feeding is carried out, and the steps are the same as (1)-(3); when the pressure change of the gas in the furnace is still less than 500Pa after the second feeding, the feeding is stopped, and the burner is kept on to continuously burn the explosive and dangerous goods in the furnace until the pressure transmitter detects that the pressure change of the gas in the furnace is greater than 500Pa. The furnace continues to burn for five minutes to ensure that the explosive and dangerous goods in the furnace are fully burned, and then the steps (1)-(3) are repeated; (6) When the temperature inside the furnace body is lower than 300°C, the burner continues to burn until the temperature inside the furnace body reaches the set range; when the temperature inside the furnace body is higher than 900°C, the temperature transmitter sends the detected data to the PLC controller, and the PLC controller turns off the burner and turns on the fan at the same time. The fan blows cold air from the air duct through the air collecting hood into the furnace body to cool the furnace body and reduce the temperature inside the furnace body to the set range, and then repeats steps (1) to (3); (7) After the handling of explosive hazardous materials is completed, the PLC controller turns off the burner and turns on the motor. The motor drives the shaft to rotate, and the rocker arm swings to open the slag discharge door, and the slag in the furnace body is discharged from the slag discharge door.

2. The working method of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods according to claim 1 is characterized by: The PLC controller is Siemens S7-1200 controller.

3. The working method of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods according to claim 1 is characterized by: The pressure transmitter is explosion-proof type PB8103CdM1H / J, and the detection pressure range is -1KPa-10MPa.

4. The working method of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods according to claim 1 is characterized by: The temperature transmitter uses an explosion-proof HGWR216PW / K240dK thermocouple with a detection temperature range of 0-1100°C.

5. The working method of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods according to claim 1 is characterized by: The pressure transmitter and the temperature transmitter are respectively provided with water cooling jackets, and the water cooling jackets are provided with a water inlet and a water outlet.

6. The working method of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods according to claim 1 is characterized by: The feeding device also includes an isolation gate, an isolation cylinder, and an isolation in place signal switch. The isolation cylinder is arranged on the feeding rack, and the output end of the isolation cylinder is connected to the isolation gate. The isolation gate is located between the feeding port and the discharge gate. An isolation in place signal switch is arranged on one side of the isolation gate. Contacts are arranged on the isolation gate. The isolation in place signal switch is located on the moving track of the contacts. The isolation in place signal switch is connected to the input end of the PLC controller through a line, and the isolation cylinder is connected to the output end of the PLC controller through a line.

7. The working method of the furnace working condition safety early warning protection system of the incineration and destruction system of explosive and dangerous goods according to claim 1 is characterized by: In step (2), when the PLC controller does not receive the shutdown signal sent by the material discharge signal switch, it continues to wait for the shutdown signal. When the shutdown signal is not received for more than five minutes, the PLC controller shuts down the entire system for maintenance.

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