Activated carbon adsorption device controlled by PLC and provided with fire safety measures

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to an activated carbon adsorption device controlled by a programmable logic controller (PLC) and provided with fire safety measures, which is characterized in that a temperature sensor is arranged in an activated carbon layer, so that the temperature of the carbon layer can be monitored in real time; when the temperature reaches a preset value, temperature information is transmitted to a PLC module on the device through an electric signal, an alarm is given, meanwhile, the PLC module controls a fire fighting water supply electric valve to be opened to introduce external tap water, and fire extinguishing and cooling are conducted on an activated carbon layer through spraying on a fire fighting pipe; and meanwhile, the PLC module controls the drainage electric ball valve 4 to be opened in a delayed manner so as to drain redundant spraying fire-fighting water.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to an activated carbon adsorption device which is controlled by a PLC and has fire safety measures. Background Art

[0002] As an adsorbent for organic waste gas, activated carbon is widely used in the field of organic waste gas treatment due to its large adsorption surface area and relatively low cost advantages. Whether it is a single activated carbon adsorption device or a high-end and complex process of activated carbon adsorption catalytic combustion desorption, activated carbon is indispensable.

[0003] Activated carbon will continuously release heat during the adsorption process. At the same time, activated carbon is flammable. This poses a challenge to the safety of equipment that uses activated carbon adsorbents as waste gas treatment during use. At present, most waste gas treatment equipment that uses activated carbon as an adsorbent rarely has reliable safety fire protection measures to prevent activated carbon combustion.

[0004] In view of the above problems, the utility model designs an activated carbon adsorption device which is controlled by PLC and has its own fire safety measures. The PLC receives the real-time monitored temperature data to realize the coordinated action between the various components in the full-process automatic control device to achieve the fire-fighting effect on the combustion of activated carbon. Summary of the invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an activated carbon adsorption device controlled by a PLC with built-in fire safety measures, which receives real-time monitored temperature data through the PLC and realizes the coordinated action between the various components in the full-process automatic control device to achieve the fire-fighting effect on the combustion of activated carbon.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an activated carbon adsorption device which is controlled by PLC and has its own fire safety measures. The inlet and outlet of the activated carbon adsorption equipment are respectively provided with fire damper 1 and fire damper 2. A carbon unloading port is provided on the bottom bottom plate of the activated carbon adsorption equipment. A drainage port connected to a drainage electric ball valve is provided at the bottom of the activated carbon adsorption equipment. A carbon loading port is provided on the top of the activated carbon adsorption equipment. An activated carbon layer is provided at a position corresponding to the carbon loading port inside the activated carbon adsorption equipment. A temperature sensor is provided in the activated carbon layer. A fire pipe is provided on the top of the activated carbon adsorption equipment. A vertical spray pipe extending into the interior of the activated carbon adsorption equipment is provided on the fire pipe. A plurality of nozzles with spraying directions toward the activated carbon layer are provided on the vertical spray pipe. The fire pipe is connected to the fire water supply electric valve. The fire water supply electric valve and the temperature sensor are respectively electrically connected to the PLC module in the device.

[0007] The bottom plate is inclined along the drain outlet for drainage.

[0008] The temperature sensor is a double thermal resistance temperature sensor.

[0009] Compared with the prior art, the utility model can monitor the temperature of the activated carbon layer in real time by setting a temperature sensor in the activated carbon layer. When the preset value is reached, the temperature information is transmitted to the PLC module on the device through an electrical signal and an alarm is issued. At the same time, the PLC module will control the fire water supply electric valve to open to introduce external tap water, and extinguish the fire and cool the activated carbon layer through the spray on the fire pipe. The PLC module also controls the drainage electric ball valve 4 to delay opening to discharge excess spray fire water. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0011] Figure 2 It is a schematic diagram of the external structure of the utility model.

[0012] Description of reference numerals:

[0013] 1 is the activated carbon adsorption equipment, 2 is the bottom plate, 3 is the drain outlet, 4 is the drain electric ball valve, 5 is the charcoal loading port, 6 is the charcoal unloading port, 7 is the fire damper 1, 8 is the fire damper 2, 9 is the nozzle, 10 is the temperature sensor, 11 is the fire pipe, 12 is the fire water supply electric valve, and 13 is the activated carbon layer. DETAILED DESCRIPTION

[0014] The utility model is now further described with reference to the accompanying drawings.

[0015] See also Figures 1-2 The utility model provides an activated carbon adsorption device controlled by PLC and equipped with fire safety measures. The inlet and outlet of the activated carbon adsorption device 1 are respectively provided with a fire damper 1 7 and a fire damper 2 8. A carbon unloading port 6 is provided on the bottom plate 2 of the activated carbon adsorption device 1. A drainage port 3 connected to a drainage electric ball valve 4 is provided at the bottom of the activated carbon adsorption device 1. A carbon loading port 5 is provided on the top of the activated carbon adsorption device 1. An activated carbon layer 13 is provided at a position corresponding to the carbon loading port 5 inside the activated carbon adsorption device 1. A temperature sensor 10 is provided in the activated carbon layer 13. A fire pipe 11 is provided on the top of the activated carbon adsorption device 1. A vertical spray pipe extending into the interior of the activated carbon adsorption device 1 is provided on the fire pipe 11. A plurality of nozzles 9 with a spraying direction toward the activated carbon layer 13 are provided on the vertical spray pipe. The fire pipe 11 is connected to a fire water supply electric valve 12. The fire water supply electric valve 12 and the temperature sensor 10 are respectively electrically connected to the PLC module in the device.

[0016] The bottom plate 2 is inclined along the drain outlet 3 for drainage.

[0017] The temperature sensor 10 is a double-branch thermal resistance temperature sensor.

[0018] Working principle:

[0019] The utility model does not require much debugging when in use:

[0020] The exhaust gas enters the activated carbon adsorption device 1 through the fire damper 1 7 at the entrance. An activated carbon layer 13 is provided in the activated carbon adsorption device 1. After being adsorbed by the activated carbon in the activated carbon layer 13, the exhaust gas is discharged from the device outlet through the fire damper 2 8. The bottom plate 2 of the activated carbon adsorption device 1 is made into an inclined plate with a slope so that the water in the activated carbon adsorption device 1 can be easily discharged later.

[0021] A double-branch temperature sensor 10 is provided in the activated carbon layer 13. When the temperature of the carbon layer monitored by the double-branch temperature sensor 10 reaches the set temperature value for fire protection, the exhaust fan is stopped by the PLC, and at the same time, the fire damper 1 7 and the fire damper 2 8 are closed, and the fire water supply electric valve 12 is opened. Tap water enters the fire pipe 11 through the fire water supply electric valve 12, and is sprayed out through the nozzle 9 connected to the fire pipe 11, and covers the surface 13 of the activated carbon layer to extinguish the fire.

[0022] Nozzles 9 are provided on both sides of the activated carbon layer 13, and the number of specific nozzles 9 on the surface is calculated according to the spraying angle and the coverage area to ensure that when the nozzles 9 are spraying, the water curtain sprayed can completely cover the surfaces on both sides of the activated carbon layer 13, so as to prevent the spread of the fire in time and extinguish it.

[0023] When the fire water supply electric valve 12 is opened, the drainage electric ball valve 4 is opened with a delay. At this time, the water sprayed by the nozzle 9 passes through the drain port 3 and is discharged through the drainage electric ball valve 4.

[0024] The double-branch thermal resistor used in the double-branch temperature sensor 10 can be used to determine whether the double-branch temperature sensor 10 is working properly by the deviation of the value displayed by the double-branch thermal resistor. If the deviation is large and exceeds the set deviation value, the PLC will issue an alarm prompt message and it needs to be replaced in time to ensure the normal operation of the device.

[0025] The above are only preferred implementations of the present invention, which are only used to help understand the method and core ideas of the present application. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the idea of ​​the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] The utility model solves the deficiency of the prior art in the activated carbon combustion treatment caused by excessively high temperature in waste gas treatment as a whole. By real-time monitoring of the temperature of the activated carbon and automatic control of fire protection to extinguish the fire in time, the device itself is protected and the fire hazard is controlled. It improves the efficiency and reduces the safety risk of waste gas treatment in this field.

Claims

1. An activated carbon adsorption device with fire safety measures controlled by PLC, characterized in that: The inlet and outlet of the activated carbon adsorption device (1) are respectively provided with a fire damper 1 (7) and a fire damper 2 (8); a carbon discharge port (6) is provided on the bottom plate (2) of the activated carbon adsorption device (1); a drainage port (3) connected to a drainage electric ball valve (4) is provided at the bottom of the activated carbon adsorption device (1); a carbon loading port (5) is provided at the top of the activated carbon adsorption device (1); an activated carbon layer (13) is provided inside the activated carbon adsorption device (1) at a position corresponding to the carbon loading port (5); the activated carbon layer (13) A temperature sensor (10) is arranged inside the activated carbon adsorption device (1); a fire pipe (11) is arranged on the top of the activated carbon adsorption device (1); a vertical spray pipe extending into the interior of the activated carbon adsorption device (1) is arranged on the fire pipe (11); a plurality of nozzles (9) are arranged on the vertical spray pipe with a spray direction toward the activated carbon layer (13); the fire pipe (11) is connected to a fire water supply electric valve (12); the fire water supply electric valve (12) and the temperature sensor (10) are respectively electrically connected to a PLC module in the device.

2. The activated carbon adsorption device with fire safety measures controlled by PLC according to claim 1 is characterized in that: The bottom plate (2) is inclined along the drainage opening (3) for drainage.

3. The activated carbon adsorption device with fire safety measures controlled by PLC according to claim 1 is characterized in that: The temperature sensor (10) is a double-branch thermal resistance temperature sensor.

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