A positive pressure explosion-proof device with dust analysis function

Abstract

This utility model discloses a positive pressure explosion-proof device with dust analysis function. It comprises a sensor chamber on the left side of a positive pressure cabinet, including a sensor, detection pipeline, heating fan, and heating air duct; a positive pressure air path area on the right side, including a positive pressure air path assembly and a protective gas source; an atomization chamber in the upper inner part of the positive pressure cabinet, including an atomization chamber heater and a cooling purge pipe; a control system chamber including a filter pipe, sampling fan, gas injector, flue gas pipeline, control panel, and control panel; a lower equipment area including a filter, positive pressure chamber exhaust port, and explosion-proof positive pressure controller; and a flue system at the rear of the positive pressure cabinet, including a sampling port, flue gas sampling pipe, flue gas exhaust pipe, and exhaust port. This utility model solves the technical problem of existing explosion-proof dust analyzers requiring a long waiting time after the analyzer finishes working before the temperature drops to the level required for the positive pressure system to stop operating.

Description

Technical Field

[0001] This utility model relates to a positive pressure explosion-proof device, specifically a positive pressure explosion-proof device with dust analysis function. Background Technology

[0002] In areas such as ambient air monitoring networks, waste incineration sites, thermal power plants, petrochemical industries, and drinking water treatment plants, flue gas generated needs to be monitored and treated online to meet standards before being released to satisfy environmental protection requirements. These areas are also prone to generating flammable and explosive gases and dust, necessitating explosion-proof online dust analyzers.

[0003] Positive pressure explosion-proof dust analyzers use fresh air at a certain pressure to circulate within the chamber, preventing surrounding flammable gases from entering the casing and isolating ignition sources to meet explosion-proof requirements. The safe positive pressure enclosure can house non-explosion-proof system components necessary for analytical operations, such as sampling fans, jet samplers, atomizing chambers, and measurement units, thereby reducing the overall size of the instrument, increasing its aesthetics, and improving its performance.

[0004] The flue gas enters the atomization chamber heater from the sampling port of the explosion-proof dust analyzer, where it is dried and heated to 280°C before the dust content can be accurately measured online. After the measurement is completed, the high temperature of the atomization chamber needs to return to normal temperature for three hours before the positive pressure system can be stopped, which affects the use of the explosion-proof dust analyzer. Summary of the Invention

[0005] This invention proposes a positive pressure explosion-proof device with dust analysis function to solve the problem that existing explosion-proof dust analyzers require a long waiting time after the analyzer finishes working before the temperature drops to the level that would stop the positive pressure system.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a positive pressure explosion-proof device with dust analysis function, including a positive pressure cabinet, a sensor cavity on the left side of the positive pressure cabinet, a positive pressure air passage area on the right side of the positive pressure cabinet, an atomizing cavity in the upper inner part of the positive pressure cabinet, a control system cavity in the lower part of the atomizing cavity in the positive pressure cabinet, a lower cavity equipment area in the lower inner part of the positive pressure cabinet, and a flue system on the rear side of the positive pressure cabinet; The atomizing chamber includes an atomizing chamber room, and the atomizing chamber room is equipped with an atomizing chamber heater and a cooling purge pipe; The sensor cavity includes a sensor, a detection pipeline, a heating fan, and a heating duct; The control system cavity includes a filter tube, a sampling fan, a gas injector, a flue gas pipeline, a control panel, and a control panel; The lower chamber equipment area includes a filter, a positive pressure chamber exhaust port, and an explosion-proof positive pressure controller; The positive pressure gas path area includes a positive pressure gas path assembly and a protective gas source; The flue system includes a sampling port, a flue gas sampling pipe, a flue gas emission pipe, and a tail gas exhaust port; The cooling purge pipe in the atomizing chamber is connected at one end to the gas source of the positive pressure gas path component in the positive pressure gas path area. The positive pressure gas path component is connected to the protective gas source and enters the positive pressure cabinet through a throttle valve. The sensor in the sensor chamber is connected to the heating fan through a heating air pipe. The other end of the detection pipe connected to the sensor is connected to the air outlet of the atomizer chamber and the flue gas pipe of the control system chamber. The control panel and control panel of the control system chamber are located below the detection pipe. The sampling fan is located below the control system chamber. One end of the sampling fan is connected to the filter in the lower chamber equipment area through a filter pipe, and the other end is connected to the gas injector. The other end of the gas injector is connected to the flue gas path. The sampling port of the flue system is connected to the atomizing chamber through a flue gas sampling pipe. One end of the flue gas exhaust pipe is connected to the flue gas path of the control system chamber, and the other end is connected to the chimney through the exhaust port.

[0007] The positive pressure explosion-proof device with dust analysis function designed using the above-mentioned technical solution has the following beneficial effects: 1. This invention achieves the goal of reducing the gas temperature to a level that can stop the positive pressure system within half an hour through the action of the cooling purge pipe; 2. This invention prevents condensate from contaminating the analyzer's sensor camera through the action of a heating fan and heating duct; 3. The present invention has a protective gas purging control system in the positive pressure gas path area, and the positive pressure purging system and the cooling system are interlocked. After the dust collector finishes working, the cooling explosion-proof solenoid valve opens, the cooling purging pipe works for 0.5 hours, the positive pressure system stops, and the main gas source switch is automatically turned off. 4. The present invention is equipped with a two-position switching explosion-proof solenoid valve in the positive pressure air circuit area. When the air exchange throttle valve is in the position, it controls the system cavity to perform purging work; after the purging work is completed, the positive pressure inside the cabinet is maintained when the throttle valve is in the position. Attached Figure Description

[0008] Figure 1 This is a schematic diagram showing the overall structure of the present invention; Figure 2 This is an isometric view of the present invention; Figure 3 This shows another isometric view of the present invention; Figure 4 This is a schematic diagram of the positive pressure air path of this utility model.

[0009] In the diagram: 1-Atomizing chamber, 101-Atomizing chamber heater, 102-Atomizing chamber, 103-Cooling purge pipe; 2-Sensor cavity, 201-Sensor, 202-Detection pipeline, 203-Heating fan, 204-Heating duct; 3-Control system cavity, 301-Filter tube, 302-Sampling fan, 303-Gas injector, 304-Flue gas pipeline, 305-Control panel, 306-Control panel; 4-Lower chamber equipment area, 401-Filter, 402-Positive pressure chamber exhaust port, 403-Explosion-proof positive pressure controller; 5-Positive pressure gas path area, 501-Positive pressure gas path assembly, 502-Protective gas source; 6-Flue system, 601-Sampling port, 602-Flue gas sampling pipe, 603-Flue gas emission pipe, 604-Tail exhaust port. Detailed Implementation

[0010] The following description, in conjunction with the accompanying drawings, details a positive pressure explosion-proof device with dust analysis function according to this utility model.

[0011] This utility model discloses a positive pressure explosion-proof device with dust analysis function. See [link to relevant documentation]. Figures 1 to 3 It includes a positive pressure cabinet, a sensor cavity 2 on the left side of the positive pressure cabinet, a positive pressure air passage area 5 on the right side of the positive pressure cabinet, an atomizing cavity 1 in the upper part of the positive pressure cabinet, a control system cavity 3 in the lower part of the atomizing cavity in the positive pressure cabinet, a lower cavity equipment area 4 in the lower part of the positive pressure cabinet, and a flue system 6 on the rear side of the positive pressure cabinet.

[0012] The atomizing chamber 1 includes an atomizing chamber 102, which contains an atomizing chamber heater 101 and a cooling purge pipe 103. The sensor chamber 2 includes a sensor 201, a detection pipe 202, a heating fan 203, and a heating air duct 204. The control system chamber 3 includes a filter pipe 301, a sampling fan 302, a gas injector 303, a flue gas pipe 304, a control panel 305, and a control panel 306. The lower chamber equipment area 4 includes a filter 401, a positive pressure chamber exhaust port 402, and an explosion-proof positive pressure controller 403. The positive pressure gas path area 5 includes a positive pressure gas path assembly 501 and a protective gas source 502. The flue system 6 includes a sampling port 601, a flue gas sampling pipe 602, a flue gas exhaust pipe 603, and a tail gas exhaust port 604.

[0013] One end of the cooling purge pipe 103 in the atomizing chamber 1 of this invention is connected to the gas source of the positive pressure gas path assembly 501 in the positive pressure gas path zone 5. The positive pressure gas path assembly 501 is connected to the protective gas source 502 and enters the positive pressure cabinet through a throttle valve. The cooling purge pipe 103 reduces the gas temperature to a temperature that can stop the positive pressure system within half an hour. The sensor 201 in the sensor chamber 2 is connected to the heating fan 203 through the heating air pipe 204. The heating fan 203 is used to prevent condensate from the detection pipe from contaminating the sensor lens. The other end of the detection pipe 202 connected to the sensor 201 is connected to the air outlet of the atomizer chamber 102 and the flue gas pipe 304 of the control system chamber 3. The control panel 305 and control panel 306 of the control system chamber 3 are located below the detection pipe 202. The control panel 305 is used to control the rotation speed of the frequency converter. The sampling fan 302 is located below the control system cavity 3. One end of the sampling fan 302 is connected to the filter 401 in the lower cavity equipment area 4 through the filter pipe (301), and the other end is connected to the gas injector 303. The other end of the gas injector 303 is connected to the flue gas passage 304 to generate negative pressure so that the gas is discharged through the flue gas passage under the action of negative pressure. The filter 401 is installed outside the positive pressure type cabinet. The sampling port 601 of the flue system 6 is connected to the atomization chamber 102 through the flue gas sampling pipe 602. One end of the flue gas exhaust pipe 603 is connected to the flue gas passage 304 of the control system cavity 3, and the other end is connected to the chimney through the tail gas exhaust port 604.

[0014] The positive pressure gas passage 5 of this utility model is equipped with a protective gas purging control system, and the positive pressure purging system and the cooling system are interlocked. After the dust collector finishes working, the cooling explosion-proof solenoid valve opens, the cooling purging pipe works for 0.5 hours, the positive pressure system stops, and the main gas source switch is automatically turned off.

[0015] For the working principle of this utility model, please refer to [link / reference]. Figure 4 Before dust detection, protective gas is introduced into the positive pressure cabinet. The explosion-proof solenoid valve is switched to the ventilation throttle valve for purging. After purging, the operating throttle valve is switched to maintain the positive pressure in the cabinet with a small flow of gas.

[0016] After the purging is completed, the sampling fan 302 is started and the sampling port 601 is connected. The dust from the chemical plant enters the atomization chamber heater 101 through the sampling port 601 to dry and heat the dust. After heating to 280°C, the dust is then subjected to negative pressure in the flue gas pipeline through the sampling fan 302 and the filter 401. Under the action of negative pressure, the dust enters the detection pipeline 202 and the flue gas pipeline 304, and the dust in the atomization chamber 1 is sampled and detected. Another part is discharged to the chimney through the flue gas pipeline 304.

[0017] After the work is completed, the cooling burst solenoid valve is opened to start the cooling purge. After working for half an hour, the temperature drops to the set temperature, the positive pressure system is shut off, and the main air supply switch is automatically turned off.

Claims

1. A positive pressure explosion-proof device with a dust analysis function, comprising a positive pressure type cabinet, characterized in that The positive pressure cabinet has a sensor cavity (2) on the left side, a positive pressure air passage area (5) on the right side, an atomizing cavity (1) in the upper part of the positive pressure cabinet, a control system cavity (3) in the lower part of the atomizing cavity in the positive pressure cabinet, a lower cavity equipment area (4) in the lower part of the positive pressure cabinet, and a flue system (6) on the rear side of the positive pressure cabinet. The atomizing chamber (1) includes an atomizing chamber (102), and an atomizing chamber heater (101) and a cooling purge pipe (103) are provided in the atomizing chamber (102). The sensor cavity (2) includes a sensor (201), a detection pipeline (202), a heating fan (203), and a heating duct (204); The control system cavity (3) includes a filter tube (301), a sampling fan (302), a gas injector (303), a flue gas pipeline (304), a control panel (305), and a control panel (306); The lower chamber equipment area (4) includes a filter (401), a positive pressure chamber exhaust port (402), and an explosion-proof positive pressure controller (403). The positive pressure gas path area (5) includes a positive pressure gas path component (501) and a protective gas source (502). The flue system (6) includes a sampling port (601), a flue gas sampling pipe (602), a flue gas emission pipe (603), and a tail gas exhaust port (604). Among them, one end of the cooling purge pipe (103) in the atomizing chamber (1) is connected to the gas source of the positive pressure gas path assembly (501) in the positive pressure gas path area (5), and the positive pressure gas path assembly (501) is connected to the protective gas source (502) and connected to the positive pressure cabinet through a throttle valve; the sensor (201) in the sensor chamber (2) is connected to the heating fan (203) through the heating air pipe (204), and the other end of the detection pipe (202) connected to the sensor (201) is connected to the air outlet of the atomizer chamber (102) and the flue gas pipe (304) of the control system chamber (3); the control panel (305) and control panel (306) of the control system chamber (3) are also connected. Located below the detection pipeline (202), the sampling fan (302) is located below the control system cavity (3). One end of the sampling fan (302) is connected to the filter (401) of the lower cavity equipment area (4) through the filter pipe (301), and the other end is connected to the gas injector (303). The other end of the gas injector (303) is connected to the flue gas path (304). The sampling port (601) of the flue system (6) is connected to the atomization chamber (102) through the flue gas sampling pipe (602). One end of the flue gas exhaust pipe (603) is connected to the flue gas path (304) of the control system cavity (3), and the other end is connected to the chimney through the exhaust port (604).

Images