Fire-fighting device for construction of desulfurizing tower of thermal power plant

Abstract

The utility model provides a fire-fighting device for construction of a desulfurizing tower of a thermal power plant. The fire-fighting device comprises a fire-fighting mechanism, a circulating seat and a PLC (Programmable Logic Controller), the fire-fighting mechanism is arranged on one side outside the desulfurizing tower and comprises a support, a lifting device and a lifting block are arranged on the support, the lifting device is used for driving the lifting block to move up and down, a water spraying pipe and a flame detector are arranged on the lifting block, one end of the water spraying pipe faces the desulfurizing tower, and the other end of the water spraying pipe is connected with a water pump through a telescopic pipe. The water pump is connected with the water tank, and the PLC controls stopping of the lifting device and starting and stopping of the water pump according to detection signals of the flame detector. The circulating seat is arranged at the bottom of the desulfurizing tower, a recycling groove is formed in the top of the circulating seat, and a filter plate is arranged at the top of the recycling groove which is connected with the water tank through a connecting pipe. According to the utility model, timely fire extinguishing can be realized; in the fire extinguishing process, redundant water can flow into the recovery tank through the filter plate and flow back into the water tank through the connecting pipe, and cyclic utilization of water resources is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization tower fire-fighting facilities, in particular to a desulfurization tower construction fire-fighting device for a thermal power plant. Background Art

[0002] The coal burned in thermal power plants produces a lot of sulfur and nitrate waste gas, which will cause pollution and form acid rain when discharged into the atmosphere. The desulfurization and denitrification equipment in thermal power plants is used to treat these waste gases containing a lot of sulfur and nitrate.

[0003] The wall of the absorption tower needs to be lined with rubber or glass flakes for anti-corrosion. The rubber lining and glass flake anti-corrosion diluents, adhesives, paints, etc. are made of flammable materials. Leakage may cause a fire.

[0004] The Chinese utility model patent with the authorization announcement number CN205360311U discloses a fire-fighting device for the construction of a desulfurization tower in a thermal power plant. The device is installed before the construction of the desulfurization tower, and can achieve full coverage of the desulfurization tower construction area. When a fire point appears at the construction site, it can be extinguished in the shortest time to prevent fire accidents and provide protection for safe construction. However, the device needs to arrange water outlets at the manhole at the bottom of the absorption tower, the manhole of the flue gas inlet, the manhole of the spray layer, the manhole of the demister, and the manhole of the flue gas outlet to ensure timely extinguishing of the fire location, and the unused water resources cannot be collected and reused during the fire extinguishing process. Utility Model Content

[0005] The purpose of the utility model is to provide a fire-fighting device for desulfurization tower construction in a thermal power plant in view of the defects of the prior art, which can ensure timely fire extinguishing and recycle water resources.

[0006] In order to solve the above technical problems, the utility model provides a fire-fighting device for desulfurization tower construction in a thermal power plant, including a fire-fighting mechanism, a circulation seat and a PLC controller;

[0007] The fire-fighting mechanism is arranged on one side outside the desulfurization tower, and the fire-fighting mechanism comprises a bracket, on which a lifting device and a lifting block are arranged, the lifting device is used to drive the lifting block to move up and down, a water spray pipe and a flame detector are arranged on the lifting block, the flame detector is used to detect the fire position of the desulfurization tower, one end of the water spray pipe faces the desulfurization tower, the other end of the water spray pipe is connected to a water pump through a telescopic pipe, the water pump is connected to a water tank, the water pump is used to pump water to the water spray pipe, and the PLC controller controls the stop of the lifting device and the start and stop of the water pump according to the detection signal of the flame detector;

[0008] The circulation seat is arranged at the bottom of the desulfurization tower, a recovery tank is provided on the top of the circulation seat, a filter plate is arranged on the top of the recovery tank, and the recovery tank is connected to the water tank through a connecting pipe for recovering water into the water tank.

[0009] The flame detector of the utility model can detect as the lifting block moves up and down. When the fire position of the desulfurization tower is detected, the PLC controller immediately stops the lifting device and starts the water pump after receiving the detection signal of the flame detector, thereby realizing timely fire extinguishing. During the fire extinguishing process, excess water can flow into the recovery tank through the filter plate and flow back to the water tank through the connecting pipe, realizing the recycling of water resources.

[0010] Furthermore, a slide groove is provided on the bracket, and the lifting block is slidably connected to the track through the slide groove.

[0011] The utility model improves the stability of the lifting block when it moves by arranging the sliding groove, and ensures the stability of the lifting block when the water spraying pipe sprays water.

[0012] Furthermore, the bracket includes two columns, the slide grooves are provided on the two columns, the slide grooves are provided on opposite sides of the two columns, and the two sides of the lifting block are respectively slidably connected to the slide grooves on the columns.

[0013] The utility model further improves the stability of the lifting block when it moves and further ensures the stability of the lifting block when the water spraying pipe sprays water by clamping the lifting block between the two slide grooves.

[0014] Furthermore, the bracket includes a base plate fixed on the ground, a door-shaped structure is vertically arranged on the base plate, the door-shaped structure includes two columns and a fixing rod, and both ends of the fixing rod are respectively connected to the top ends of the two columns.

[0015] The utility model utilizes a fixing rod to connect two upright posts into one body, thus ensuring the stability of the upright posts.

[0016] Furthermore, the fixing rod is connected to the desulfurization tower via a connecting rod.

[0017] The utility model utilizes a connecting rod to connect the support and the desulfurization tower, thereby further improving the stability of the support.

[0018] Furthermore, a water spray head is arranged at one end of the water spray pipe facing the desulfurization tower, the water spray head has multiple water outlets, the water spray head is rotatably sealed and connected to the water spray pipe, a gear is arranged on the water spray head, a second motor is arranged on the lifting block, and the second motor is connected to the gear transmission through transmission teeth to control the rotation of the water spray head.

[0019] The utility model is beneficial to improving the fire extinguishing effect of the water spray pipe by arranging a plurality of water outlets and enabling the water spray head to rotate.

[0020] Furthermore, the lifting device includes a first motor and a screw rod, the screw rod is rotatably connected to the bracket, the first motor is used to drive the screw rod to rotate, a lifting block is provided on the screw rod, and the screw rod is arranged vertically so that the lifting block can move up and down with the rotation of the screw rod.

[0021] Furthermore, the recovery tank is annular and is arranged around the outer wall of the desulfurization tower.

[0022] The recovery tank of the utility model is arranged around the outer wall of the desulfurization tower, so that the excess water directly flows into the recovery tank without flowing out of the circulation seat.

[0023] Furthermore, the connection between the connecting pipe and the recovery tank is close to the top of the recovery tank.

[0024] The connection between the recovery tank and the connecting pipe of the utility model is close to the top of the recovery tank, so that the connection between the recovery tank and the connecting pipe is located at a higher position, thereby preventing water in the water tank from pouring into the recovery tank.

[0025] Furthermore, it comprises a smoke sensor, which is arranged in the desulfurization tower and is used to input a smoke signal to a PLC controller, and the PLC controller controls the start-up of the lifting device according to the smoke signal.

[0026] The utility model can timely detect whether the desulfurization tower is on fire by arranging a smoke sensor, without the need to control the flame detector to continuously move up and down to detect whether the fire is on, and only needs to start the lifting device after the fire is on and aim the water spray pipe at the fire point.

[0027] The beneficial effects of the utility model are as follows: the utility model is used in the initial construction stage of the desulfurization tower. The flame detector of the utility model can detect as the lifting block moves up and down. When the fire position of the desulfurization tower is detected, the PLC controller immediately stops the lifting device and starts the water pump after receiving the detection signal of the flame detector, thereby realizing timely fire extinguishing; during the fire extinguishing process, excess water can flow into the recovery tank through the filter plate, and flow back to the water tank through the connecting pipe, realizing the recycling of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 It is a structural schematic diagram of the lifting device and lifting block of the utility model;

[0030] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0031] Figure 4It is a schematic diagram of the cross-sectional structure of the lifting block of the utility model.

[0032] Figure numerals: desulfurization tower 1; fire-fighting mechanism 2; bracket 21; first motor 22; screw rod 23; lifting block 24; flame detector 25; water spray pipe 26; gear 27; transmission gear 28; second motor 29; water inlet pipe 210; telescopic pipe 211; water pump 212; water tank 213; circulation seat 3; base 31; filter plate 32; connecting pipe 33. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] like Figure 1 As shown, this embodiment provides a fire-fighting device for desulfurization tower construction in a thermal power plant, including a fire-fighting mechanism 2, a circulation seat 3 and a PLC controller.

[0035] The fire fighting mechanism 2 is arranged on one side outside the desulfurization tower 1. The fire fighting mechanism 2 includes a bracket 21, a lifting device, and a lifting block 24. The bracket 21 is L-shaped. The bracket 21 includes a bottom plate and a door-shaped structure. The bottom plate is fixed to the ground by anchor bolts. The door-shaped structure is perpendicular to the bottom plate. The door-shaped structure includes a fixing rod and two columns. The bottom ends of the two columns are fixedly connected to one end of the bottom plate. The two ends of the fixing rod are respectively connected to the top ends of the two columns to form a door shape. The fixing rod is connected to the desulfurization tower 1 through a connecting rod. Slide grooves are provided on the opposite sides of the two columns. Figure 1 Not indicated.

[0036] like Figure 1 , 2 As shown, the lifting device includes a first motor 22 and a screw rod 23. The first motor 22 is arranged at the top of the fixed rod. The top end of the screw rod 23 passes through the fixed rod and is connected to the output shaft of the first motor 22. The bottom end of the screw rod 23 is rotatably connected to the bottom plate. A lifting block 24 is arranged between two columns. Both sides of the lifting block 24 are slidably connected to the two columns through a slide groove. One end of the screw rod 23 passes through the lifting block 24 and is threadedly matched with the lifting block 24, so that the lifting block 24 can move up and down when the screw rod 23 rotates.

[0037] like Figure 2 , 4As shown, a flame detector 25 is arranged on the lifting block 24 near the desulfurization tower 1, a second motor 29 and a water spray pipe 26 are arranged on the lifting block 24, the water spray pipe 26 includes a water inlet pipe 210 and a water spray head, the water spray head is rotatably connected to the lifting block 24, a plurality of water outlets are arranged on the water spray head, one end of the water spray head away from the water outlet is rotatably sealed and connected to one end of the water inlet pipe 210, a gear 27 is fixedly arranged on the water spray head, a transmission gear 28 is arranged on the output shaft of the second motor 29, and the transmission gear 28 is meshed with the gear 27, so that the rotation of the water spray head is controlled by the second motor 29. Figure 2 , 3 As shown, the other end of the water inlet pipe 210 is connected to the water pump 212 through the telescopic tube 211, and the water pump 212 is connected to the inside of the water tank 213. The water in the water tank 213 can be pumped into the sprinkler head through the water pump 212.

[0038] Through the lifting device, the flame detector 25 can continuously move up and down to detect the flame, thereby achieving the monitoring function, but the lifting device needs to work continuously, which is less economical. In order to avoid the lifting device working continuously, a smoke sensor is arranged in the desulfurization tower 1, and the smoke sensor is connected to the PLC controller to input a smoke signal to the PLC controller, and the PLC controller controls the start of the lifting device according to the smoke signal.

[0039] In this embodiment, the PLC controller is connected to the water pump 212 , the first motor 22 , the second motor 29 , and the flame detector 25 , respectively.

[0040] like Figure 3 As shown, the circulation seat 3 is arranged at the bottom of the desulfurization tower 1, and the circulation seat 3 includes a base 31. A recovery tank is provided on the top of the base 31. The recovery tank is annular and arranged around the outer wall of the desulfurization tower 1. A filter plate 32 is arranged on the top of the recovery tank. The recovery tank is connected to the water tank 213 through a connecting pipe 33. The connection between the connecting pipe 33 and the recovery tank is close to the top of the recovery tank. The connecting pipe 33 is used to recover water to the water tank 213.

[0041] The working principle of the fire fighting device for the desulfurization tower construction of the thermal power plant is as follows: when the PLC controller receives the smoke signal, it controls the first motor 22 to start, the first motor 22 controls the lifting block 24 to move up and down through the screw rod 23, and the flame detector 25 moves up and down with the lifting block 24. When the flame detector 25 detects the flame, it sends a signal to the PLC controller, and the PLC controller immediately stops the first motor 22 and starts the second motor 29 and the water pump 212. The water pump 212 pumps the water in the water tank 213 into the water spray pipe 26 to spray water at the fire. The second motor 29 controls the water spray head to rotate to increase the fire fighting area. The water after the fire fighting flows to the recovery tank opened above the circulation seat 3, and the water after the fire fighting is filtered by the filter plate 32 above the circulation seat 3. When the water in the circulation seat 3 reaches a certain height, the water inside the circulation seat 3 is transported to the water tank 213 through the connecting pipe 33, realizing the recycling of water resources.

[0042] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A fire-fighting device for desulfurization tower construction in a thermal power plant, characterized in that: It includes a fire fighting mechanism (2), a circulation seat (3) and a PLC controller; The fire-fighting mechanism (2) is arranged on one side outside the desulfurization tower (1), and the fire-fighting mechanism (2) comprises a bracket (21), and a lifting device and a lifting block (24) are arranged on the bracket (21), and the lifting device is used to drive the lifting block (24) to move up and down, and a water spray pipe (26) and a flame detector (25) are arranged on the lifting block (24), and the flame detector (25) is used to detect the fire position of the desulfurization tower (1), one end of the water spray pipe (26) faces the desulfurization tower (1), and the other end of the water spray pipe (26) is connected to a water pump (212) through a telescopic pipe (211), and the water pump (212) is connected to a water tank (213), and the water pump (212) is used to pump water to the water spray pipe (26), and the PLC controller controls the stopping of the lifting device and the starting and stopping of the water pump (212) according to the detection signal of the flame detector (25); The circulation seat (3) is arranged at the bottom of the desulfurization tower (1), a recovery tank is provided at the top of the circulation seat (3), a filter plate (32) is provided at the top of the recovery tank, and the recovery tank is connected to the water tank (213) through a connecting pipe (33) for recovering water into the water tank (213).

2. The fire-fighting device for desulfurization tower construction in a thermal power plant according to claim 1, characterized in that: The bracket (21) is provided with a slide groove, and the lifting block (24) is slidably connected to the track via the slide groove.

3. The fire-fighting device for desulfurization tower construction in a thermal power plant according to claim 2, characterized in that: The support (21) comprises two columns, and the slide grooves are provided on both columns. The slide grooves are provided on opposite sides of the two columns, and the two sides of the lifting block (24) are respectively slidably connected to the slide grooves on the columns.

4. The fire-fighting device for desulfurization tower construction in a thermal power plant according to claim 3, characterized in that: The bracket (21) comprises a bottom plate fixed on the ground, a door-shaped structure is vertically arranged on the bottom plate, the door-shaped structure comprises two upright posts and a fixing rod, and the two ends of the fixing rod are respectively connected to the top ends of the two upright posts.

5. The fire-fighting device for desulfurization tower construction in a thermal power plant according to claim 4, characterized in that: The fixing rod is connected to the desulfurization tower (1) via a connecting rod.

6. The fire fighting device for desulfurization tower construction in a thermal power plant according to any one of claims 1 to 5, characterized in that: A water spray head is arranged at one end of the water spray pipe (26) facing the desulfurization tower (1), and the water spray head has a plurality of water outlets. The water spray head is rotatably sealed with the water spray pipe (26), a gear (27) is arranged on the water spray head, and a second motor (29) is arranged on the lifting block (24). The second motor (29) is transmission-connected to the gear (27) via a transmission tooth (28) for controlling the rotation of the water spray head.

7. The fire-fighting device for desulfurization tower construction in a thermal power plant according to any one of claims 1 to 5, characterized in that: The lifting device comprises a first motor (22) and a screw rod (23); the screw rod (23) is rotatably connected to the bracket (21); the first motor (22) is used to drive the screw rod (23) to rotate; a lifting block (24) is arranged on the screw rod (23); the screw rod (23) is arranged vertically, so that the lifting block (24) can move up and down as the screw rod (23) rotates.

8. The fire fighting device for desulfurization tower construction in a thermal power plant according to any one of claims 1 to 5, characterized in that: The recovery tank is annular and is arranged around the outer wall of the desulfurization tower (1).

9. The fire fighting device for desulfurization tower construction in a thermal power plant according to any one of claims 1 to 5, characterized in that: The connection point between the connecting pipe (33) and the recovery tank is close to the top of the recovery tank.

10. The fire fighting device for desulfurization tower construction in a thermal power plant according to any one of claims 1 to 5, characterized in that: It comprises a smoke sensor, which is arranged in a desulfurization tower (1). The smoke sensor is used to input a smoke signal to a PLC controller, and the PLC controller controls the start-up of the lifting device according to the smoke signal.

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