Organic waste gas activated carbon adsorption box ignition early warning device

Abstract

The utility model provides an organic waste gas activated carbon adsorption box ignition early warning device, which belongs to the technical field of organic waste gas purification, and comprises an activated carbon adsorption box, a CO concentration detector, a nitrogen storage tank, a nitrogen making unit and a PLC (programmable logic controller) control system, and a plurality of activated carbon adsorption layers are arranged in the activated carbon adsorption box; the CO concentration detector is mounted on the activated carbon adsorption box; the nitrogen storage tank feeds nitrogen into the activated carbon adsorption box through a nitrogen conveying pipe, and a nitrogen control valve is arranged on the nitrogen conveying pipe; the nitrogen making unit feeds produced nitrogen into the nitrogen storage tank through a nitrogen supply pipe; and the PLC control system controls the nitrogen control valve to be opened and closed by receiving a signal of the CO concentration detector. And the CO concentration detector can be used for more sensitively capturing the CO gas concentration change at the initial stage of a fire, so that the risk of spontaneous combustion of the activated carbon adsorption box caused by overhigh temperature in the organic waste gas treatment process can be effectively prevented, and the protection purposes of early warning and fire extinguishing are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of organic waste gas treatment, and particularly relates to a kind of organic waste gas activated carbon adsorption box ignition early warning device. BACKGROUND

[0002] In the process of organic waste gas treatment, activated carbon adsorption is the main technical means for treating low-concentration and large-volume organic waste gas in industry. However, the activated carbon in the waste gas treatment equipment continuously releases heat during the adsorption and desorption of pollutants, causing the temperature to continuously rise. In addition, due to the external temperature rise, the temperature of the activated carbon is further increased. When the temperature in the activated carbon adsorption tank accumulates to a certain extent, it can cause a fire and explosion accident.

[0003] Therefore, from the perspective of safe operation of the equipment, a pre-warning protection device is needed to prevent the occurrence of fire and explosion accidents. The existing pre-warning protection device mainly uses a temperature sensor to monitor the temperature. Since the three elements that cause a fire are combustible material, combustion-supporting material and fire source, the three elements work together to cause a fire. For the environment in the activated carbon adsorption tank, the combustible material is organic waste gas, the combustion-supporting material is oxygen, and the fire source is the continuously rising temperature. When the combustible material comes into contact with oxygen and reaches the ignition point, a combustion reaction will occur. Of course, the sufficient conditions for combustion require a certain concentration of combustible material, a certain concentration of combustion-supporting material, a certain ignition energy and mutual interaction. If one of these conditions is not met, combustion or explosion will not occur.

[0004] Since the temperature in the activated carbon adsorption tank is continuously rising during the adsorption and purification of organic waste gas, as the temperature in the activated carbon adsorption tank rises, the activated carbon adsorption layer is oxidized to form CO at high temperature. As the temperature rises, the CO concentration gradually increases. At this time, the temperature has not yet reached the ignition point, but carbon monoxide is a flammable and explosive gas. When the concentration of carbon monoxide reaches a certain limit, a spontaneous combustion reaction will occur, which does not require an external flame or spark to ignite and can ignite on its own. The heat energy and fire generated by the combustion of carbon monoxide are very strong, which can cause a fire or explosion. Therefore, the pre-warning protection device that only monitors the temperature through a temperature sensor has deficiencies. CONTENT OF THE UTILITY MODEL

[0005] The utility model embodiment provides a kind of organic waste gas activated carbon adsorption tank ignition early warning device, to solve the problem that only through temperature sensor cannot achieve effective pre-warning protection.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a kind of organic waste gas activated carbon adsorption tank ignition early warning device, comprising:

[0007] The activated carbon adsorption tank is provided with multiple layers of activated carbon adsorption layers.

[0008] A CO concentration detector is installed on the activated carbon adsorption box to detect the CO concentration in the activated carbon adsorption box.

[0009] A nitrogen storage tank is used to send nitrogen into the activated carbon adsorption box through a nitrogen delivery pipe, and a nitrogen control valve is arranged on the nitrogen delivery pipe.

[0010] A nitrogen generator set is used to send the produced nitrogen into the nitrogen storage tank through a nitrogen supply pipe.

[0011] A PLC control system is used to control the opening and closing of the nitrogen control valve by receiving the signal of the CO concentration detector.

[0012] In an implementable manner, a plurality of CO concentration detectors are arranged between adjacent activated carbon adsorption layers, and each CO concentration detector is connected to the PLC control system in parallel through a line to obtain the CO concentration at each detection point.

[0013] In an implementable manner, the CO concentration detectors are arranged at two corners of the gas outlet end of the activated carbon adsorption box.

[0014] In an implementable manner, a plurality of nitrogen branch pipes are arranged on the upper part of the activated carbon adsorption box in parallel with the nitrogen delivery pipe, and a plurality of spray pipes are arranged on each nitrogen branch pipe, and the lower end of each spray pipe is provided with a nozzle extending into the activated carbon adsorption box.

[0015] In an implementable manner, the distance between the nozzles gradually decreases from the gas inlet end to the gas outlet end of the activated carbon adsorption box.

[0016] In an implementable manner, a support is arranged on the upper part of the activated carbon adsorption box, and an arc-shaped clamping groove is arranged on the support to clamp the nitrogen branch pipe.

[0017] In an implementable manner, a mounting hole is arranged on the top plate of the activated carbon adsorption box for the spray pipe to pass through, and the diameter of the mounting hole is greater than the diameter of the nozzle so that the nozzle can pass through the mounting hole, and a two-way seal cover is arranged on the mounting hole, and a through hole is arranged at the center of the two-way seal cover to fit the spray pipe, and the two-way seal cover is fastened to the top plate of the activated carbon adsorption box by bolts.

[0018] In an implementable mode, the sealable cover comprises two first and second half-seal covers which can be butted against each other, the first half-seal cover is provided with a protrusion on a butt joint surface thereof, and the second half-seal cover is provided with a groove which engages with the protrusion; the first and second half-seal covers are respectively provided with a semicircular hole, and the two semicircular holes are closed to form the through hole.

[0019] In an implementable mode, the edge of the lower surface of the first half-seal cover and the edge of the lower surface of the second half-seal cover are respectively provided with a half-seal stopper which extends into the mounting hole, and the two half-seal stoppers are closed to form a ring-shaped seal stopper.

[0020] In an implementable mode, a sealing gasket is arranged between the lower surface of the first half-seal cover and the lower surface of the second half-seal cover and the top plate of the activated carbon adsorption tank.

[0021] Compared with the prior art, the organic waste gas activated carbon adsorption tank ignition early warning device has the beneficial effects that before the temperature rises to the ignition point, the CO concentration detector can more sensitively capture the CO gas concentration change in the initial stage of the fire, so that the early warning of the fire is realized earlier, and before the CO concentration reaches the set upper limit value, nitrogen gas is introduced to extinguish the fire, so that the combustion and explosion accident in the activated carbon adsorption process is avoided, the purpose of the fire prevention and efficient fire extinguishing after the fire is realized, and the equipment body and the adsorption filler are effectively protected.

[0022] The early warning device can effectively prevent the risk of self-ignition of the activated carbon adsorption tank due to excessively high temperature in the organic waste gas treatment process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structure schematic view of the organic waste gas activated carbon adsorption tank ignition early warning device is provided for the embodiments of the present application.

[0024] Figure 2 A layout structure schematic view of the nozzle and the CO concentration detector arranged on the activated carbon adsorption tank is provided for the embodiments of the present application.

[0025] Figure 3 A structure schematic view of the support of the nitrogen gas branch pipe is provided for the embodiments of the present application.

[0026] Figure 4 A closed state structure schematic view of the sealable cover is provided for the embodiments of the present application.

[0027] Figure 5 An open state structure schematic view of the sealable cover is provided for the embodiments of the present application.

[0028] Figure 6The cross section structure schematic diagram of the openable sealing cover is provided for the embodiment of the utility model.

[0029] Figure 7 The distribution structure schematic diagram of the openable sealing cover on the active carbon adsorption box is provided for the embodiment of the utility model.

[0030] Mark explanation:

[0031] 1, air compressor; 2, nitrogen generator unit; 3, check valve; 4, nitrogen gas supply pipe; 5, nitrogen storage tank; 6, nitrogen control valve; 7, nitrogen delivery pipe; 8, CO concentration detector; 9, nozzle; 10, spray pipe; 11, nitrogen branch pipe; 12, active carbon adsorption layer; 13, active carbon adsorption box; 14, PLC control system; 15, support; 16, arc-shaped clamping groove; 17, first half sealing cover; 18, bolt hole; 19, through hole; 20, second half sealing cover; 21, recess; 22, protruding block; 23, annular sealing stop; 24, openable sealing cover. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical schemes and beneficial effects to be solved in the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and embodiments.It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0033] Please refer to Figure 1 And Figure 2 Now the organic waste gas active carbon adsorption box fire early warning device provided by the utility model will be described.The organic waste gas active carbon adsorption box fire early warning device includes: active carbon adsorption box 13, CO concentration detector 8, nitrogen storage tank 5, nitrogen generator unit 2 and PLC control system, the active carbon adsorption box 13 is provided with multiple layers of active carbon adsorption layer 12; the CO concentration detector 8 is installed on the active carbon adsorption box 13 and detects the CO concentration in the active carbon adsorption box 13; the nitrogen storage tank 5 sends nitrogen into the active carbon adsorption box 13 through the nitrogen delivery pipe 7, and the nitrogen delivery pipe 7 is provided with a nitrogen control valve 6; the nitrogen generator unit 2 sends the produced nitrogen into the nitrogen storage tank 5 through the nitrogen gas supply pipe 4; the PLC control system controls the opening and closing of the nitrogen control valve 6 by receiving the signal of the CO concentration detector 8.

[0034] The early warning fire extinguishing working process of the application is as follows: the CO concentration detector 8 replaces the traditional temperature detector, the CO concentration in the activated carbon adsorption box 13 is monitored through the CO concentration detector 8, when the CO concentration reaches the threshold value, the PLC control system 14 judges whether the CO in the activated carbon adsorption box 13 has the risk of spontaneous combustion, so that the nitrogen control valve 6 located on the nitrogen conveying pipe 7 is opened, the nitrogen reaches the nozzle 9 located in the activated carbon adsorption box 13 through the nitrogen conveying pipe 7, so that the nitrogen fills the entire activated carbon adsorption box 13, and the purpose of preventing the activated carbon adsorption box 13 from catching fire is achieved.

[0035] Compared with the prior art, the beneficial effects of the organic waste gas activated carbon adsorption box 13 ignition early warning device are that: before the temperature rises to the ignition point, the CO gas concentration change in the early stage of the fire can be more sensitively captured by the CO concentration detector 8, so that the early warning of the fire is realized earlier, the nitrogen is introduced for fire extinguishing before the CO concentration reaches the set upper limit value, the combustion and explosion accidents in the activated carbon adsorption process are avoided, the purposes of fire prevention in advance and efficient fire extinguishing after the fire are realized, and the equipment body and the adsorption filler are effectively protected.

[0036] The CO concentration detector 8 is adopted to detect the CO concentration in the application, compared with the temperature sensor, the fire in the carbon box can be more early identified, so that the safe operation of the equipment is more ensured.

[0037] Compared with water spraying protection, nitrogen protection is more economical and effective, water spraying can cause the activated carbon to collapse and thus cannot be reused, and nitrogen protection completely avoids this defect, so that it is more economical and effective.

[0038] The nitrogen used for fire extinguishing in the application is generated by the nitrogen making unit 2, including the nitrogen making unit 2 for preparing nitrogen, the nitrogen storage tank 5 for storing nitrogen, and the air compressor 1 for ensuring the nitrogen making efficiency, wherein the nitrogen making unit 2 is connected with the PLC control system 14. The one-way valve 3 is arranged between the nitrogen making unit 2 and the nitrogen storage tank 5, and the one-way valve 3 is connected with the PLC control system 14. The pressure sensor is arranged in the nitrogen storage tank 5, and the pressure sensor is connected with the PLC control system 14. When the nitrogen pressure in the nitrogen storage tank 5 is lower than the set value, the one-way valve 3 is opened, and the nitrogen making unit 2 starts to operate, so as to ensure that the nitrogen is sufficient for subsequent fire extinguishing.

[0039] In some embodiments, referring to Figure 2, multiple CO concentration detectors 8 are arranged between adjacent activated carbon adsorption layers 12, each CO concentration detector 8 is connected to the PLC control system 14 in parallel through a line to obtain the CO concentration of each detection point. By dispersing the CO concentration detectors 8 and collecting the CO concentrations at different points, the highest point of the CO concentration can be detected. When the CO concentration at a certain point exceeds the set upper limit, the PLC control system 14 can instruct the nitrogen control valve 6 to open and inject nitrogen into the activated carbon adsorption tank 13.

[0040] In some embodiments, referring to Figure 2 , two CO concentration detectors 8 are arranged at the two corners of the gas outlet end of the activated carbon adsorption tank 13. Since the temperature and CO concentration in the activated carbon adsorption tank 13 gradually increase from the gas inlet end to the gas outlet end as the organic waste gas passes through multiple activated carbon adsorption layers 12, and the CO concentration is higher at the corners due to the blocking of the gas outlet end cover of the activated carbon adsorption tank 13, the CO concentration detectors 8 are arranged at the corners to detect the highest point of the CO concentration in the activated carbon adsorption tank 13, thereby avoiding the risk of explosion.

[0041] In some embodiments, referring to Figure 2 , multiple nitrogen branch pipes 11 are arranged above the activated carbon adsorption tank 13 and connected in parallel to the nitrogen delivery pipe 7. Multiple spray pipes 10 are arranged on each nitrogen branch pipe 11, and the lower end of each spray pipe 10 is provided with a nozzle 9 that extends into the activated carbon adsorption tank 13. By dispersing multiple nozzles 9, nitrogen can quickly fill the entire space in the activated carbon adsorption tank 13, improving the effect of nitrogen fire extinguishing.

[0042] In some embodiments, referring to Figure 2 , the distance between the nozzles 9 gradually decreases from the gas inlet end to the gas outlet end of the activated carbon adsorption tank 13. According to the above analysis, the CO concentration in the activated carbon adsorption tank 13 gradually increases from the gas inlet end to the gas outlet end, so more nozzles 9 are arranged in the area with high CO concentration per unit area.

[0043] In some embodiments, referring to Figure 3 and Figure 7 , a support 15 is arranged above the activated carbon adsorption tank 13, and an arc-shaped clamping groove 16 is arranged on the support 15 to clamp the nitrogen branch pipe 11. Each nitrogen branch pipe 11 is supported by two supports 15 to improve the stability of the nitrogen branch pipe 11.

[0044] In some embodiments, referring to Figures 4 to 7The top plate of the activated carbon adsorption box 13 is provided with a mounting hole for the spray pipe 10 to pass through, the diameter of the mounting hole is larger than the diameter of the nozzle 9, so that the nozzle 9 passes through the mounting hole; the mounting hole is provided with a two-way openable sealing cover 24, the center of the two-way openable sealing cover 24 is provided with a through hole 19 matched with the spray pipe 10; the two-way openable sealing cover is fastened to the top plate of the activated carbon adsorption box 13 by bolts. Generally, the diameter of the nozzle 9 is larger than the diameter of the installed spray pipe 10, and the nozzle 9 needs to be installed in the activated carbon adsorption box 13, which has the problem of inconvenient installation. The nozzle 9 can be inserted into the activated carbon adsorption box 13 from above the activated carbon adsorption box 13 through the mounting hole, the upper end of the spray pipe 10 is installed on the nitrogen branch pipe 11, and then the mounting hole is sealed by the two-way openable sealing cover 24. The nozzle 9 can be installed in the activated carbon adsorption box 13 manually outside the activated carbon adsorption box 13, which is simple and convenient to install. Moreover, the nozzle 9 can be taken out and replaced through the detachable two-way openable sealing cover, which is very convenient for installation, disassembly and replacement.

[0045] Among them, the edge of the two-way openable sealing cover 24 is provided with a bolt hole 18.

[0046] In some embodiments, referring to Figures 4 to 6 The two-way openable sealing cover 24 includes two butt-jointed first half sealing cover 17 and second half sealing cover 20, the butt-jointed surface of the first half sealing cover 17 is provided with a protrusion 22, and the butt-jointed surface of the second half sealing cover 20 is provided with a groove 21 engaged with the protrusion 22; the first half sealing cover 17 and the second half sealing cover 20 are respectively provided with a semicircular hole, and the two semicircular holes are closed to form the through hole 19. The mutual engagement of the protrusion 22 and the groove 21 improves the positioning accuracy, and the bending surface formed by the engagement has a sealing effect.

[0047] In some embodiments, referring to Figures 4 to 6 The edges of the lower surfaces of the first half sealing cover 17 and the second half sealing cover 20 are provided with half sealing stops extending into the mounting hole, and the two half sealing stops are closed to form an annular sealing stop 23. The annular sealing stop 23 extending into the mounting hole has a sealing effect and a radial limiting effect.

[0048] In some embodiments, referring to Figures 4 to 6 Figures 4 to 6 The lower surfaces of the first half sealing cover 17 and the second half sealing cover 20 are provided with sealing washers between the top plate of the activated carbon adsorption box 13. Further improve the sealing performance, and avoid the risk of gas leakage between the two-way openable sealing cover and the top plate of the activated carbon adsorption box 13.

[0049] Optionally, the first half sealing cover 17 and the second half sealing cover 20 are rotatably connected by a pin shaft at one end, and are not connected at the other end. When installing, the two half sealing covers are opened, surrounded, and then butted to be wrapped around the outside of the spray pipe 10. Of course, the inner wall of the through hole 19 is also provided with an elastic sealing ring, which forms a close contact with the spray pipe 10 to prevent the gas in the activated carbon adsorption box 13 from leaking from the through hole 19.

[0050] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0051] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An organic waste gas activated carbon adsorption tank ignition early warning device, characterized in that, The application relates to a carbon adsorption box (13) with multiple carbon adsorption layers (12) arranged inside; a CO concentration detector (8) arranged on the carbon adsorption box (13) and used for detecting the CO concentration in the carbon adsorption box (13); a nitrogen storage tank (5) used for sending nitrogen into the carbon adsorption box (13) through a nitrogen conveying pipe (7) provided with a nitrogen control valve (6); a nitrogen production unit (2) used for sending the produced nitrogen into the nitrogen storage tank (5) through a nitrogen supply pipe (4); and a PLC control system used for controlling the opening and closing of the nitrogen control valve (6) by receiving the signal of the CO concentration detector (8). A plurality of CO concentration detectors (8) are arranged between adjacent carbon adsorption layers (12), each CO concentration detector (8) is connected to the PLC control system (14) in parallel through a line, and the CO concentration at each detection point is obtained. The CO concentration detectors (8) are arranged at two corners of the gas outlet end of the carbon adsorption box (13). The upper portion of the carbon adsorption box (13) is provided with a plurality of nitrogen branch pipes (11) connected to the nitrogen conveying pipe (7) in parallel, each nitrogen branch pipe (11) is provided with a plurality of spray pipes (10) arranged in a scattered manner, the lower end of each spray pipe (10) is provided with a nozzle (9) extending into the carbon adsorption box (13). The distance between the nozzles (9) gradually decreases from the gas inlet end to the gas outlet end of the carbon adsorption box (13). The upper portion of the carbon adsorption box (13) is provided with a support (15) provided with an arc-shaped clamping groove (16) used for clamping the nitrogen branch pipe (11). The top plate of the carbon adsorption box (13) is provided with mounting holes used for the spray pipes (10) to pass through, the diameter of the mounting holes is larger than the diameter of the nozzles (9), so that the nozzles (9) can pass through the mounting holes; the mounting holes are provided with a two-way sealing cover (24) provided with a through hole (19) matched with the spray pipes (10); and the two-way sealing cover (24) is fastened to the top plate of the carbon adsorption box (13) through bolts. The two-way sealing cover (24) comprises a first half sealing cover (17) and a second half sealing cover (20) which can be connected to each other, the connecting surface of the first half sealing cover (17) is provided with a protrusion (22), the connecting surface of the second half sealing cover (20) is provided with a groove (21) engaged with the protrusion (22); the first half sealing cover (17) and the second half sealing cover (20) are respectively provided with half circular holes, and the two half circular holes are closed to form the through hole (19). The edges of the lower surfaces of the first half sealing cover (17) and the second half sealing cover (20) are respectively provided with half sealing stops extending into the mounting holes, and the two half sealing stops are closed to form an annular sealing stop (23).

2. The organic waste active carbon adsorption tank ignition early warning device according to claim 1, characterized in that, ​ 3. The organic waste active carbon adsorption tank fire early warning device according to claim 2, characterized in that, ​ 4. The organic waste active carbon adsorption tank ignition early warning device according to claim 2, characterized in that, ​ 5. The organic waste active carbon adsorption tank ignition early warning device according to claim 2, characterized in that, ​ 6. The organic waste active carbon adsorption tank fire early warning device according to claim 5, characterized in that, ​ 7. The organic waste active carbon adsorption tank fire early warning device according to claim 6, characterized in that, ​ 8. The organic waste active carbon adsorption tank fire warning device according to claim 6, characterized in that, A sealing washer is arranged between the lower surface of the first and second half-sealing covers (17, 20) and the top plate of the activated carbon adsorption tank (13).

Images