Fire-fighting automatic spraying device for sewage plant pretreatment grid slag vacuum conveying system

Abstract

The utility model discloses a fire-fighting automatic spraying device for a pretreatment grid slag vacuum conveying system of a sewage plant. The fire-fighting automatic spraying device comprises a fire-fighting pipe network, a first fire-fighting branch pipe, a second fire-fighting branch pipe, a third fire-fighting branch pipe, a spraying head, an alarm and a controller, when a fire disaster happens, reclaimed water is used for automatic spraying, an alarm is given out, hidden dangers of heating and drying equipment and the like on fire safety in the vacuum conveying process of grating slag can be solved, and the initial fire disaster is effectively controlled and extinguished.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to a fire automatic sprinkler device for a sewage treatment plant's pre-treatment grid residue vacuum conveying system. Background Art

[0002] During the daily operation of a sewage treatment plant, a sand and water separator and a grille are generally set in the pre-treatment stage to remove various floating and suspended substances in the sewage. These floating and suspended substances are called grid residues. If not properly treated, it will cause trouble and impact on the subsequent treatment process.

[0003] Currently, grid residues are generally conveyed by a belt conveyor or a screw conveyor to a press for pressing and then sent to a trash can, and then collected by manual pushing and transported out for treatment. Since grid residues have a strong odor and contain oily substances, this method will cause a poor environment in the treatment workshop and is time-consuming and laborious. To ensure the environment of the grid residue and sand collection and conveying workshop and solve the problem of time-consuming and laborious manual transportation, in-depth analysis and research were carried out on the pre-treatment area of the sewage treatment plant. Finally, the original ground open sewage pre-treatment area was transferred to underground treatment, and the vacuum adsorption principle was used to convey grid residues, sand and other garbage from various places to the ground layer for transfer through pipeline-type closed transportation, based on which the transformation of the ultra-clean space of the sewage treatment plant's pre-treatment was completed. Among them, when using vacuum adsorption to convey grid residues of the grille, crushing and drying equipment needs to be equipped to facilitate the treatment of various grid residues with different properties generated in the sewage pre-treatment process; and heat will inevitably be generated during the drying and discharging of grid residues. Therefore, once a fire occurs, it will cause the combustion to develop rapidly in the initial stage, which will pose a fire safety hazard; at present, it is generally started by the action of a closed sprinkler head spraying water, and the action error is large. It is applicable to occasions where the ambient temperature is 4 - 70 °C. Due to the thermal inertia of such closed sprinkler heads, their action will lag, and they are not suitable for occasions where the combustion develops rapidly. Summary of the Utility Model

[0004] Aiming at the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a fire automatic sprinkler device for a sewage treatment plant's pre-treatment grid residue vacuum conveying system, which uses reclaimed water for automatic sprinkling and gives an alarm in case of a fire, can solve the fire safety hazards existing in the heating and drying equipment during the vacuum conveying process of grid residues of the grille, and effectively control and extinguish the initial fire.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a fire automatic sprinkler device for a sewage treatment plant's pre-treatment grid residue vacuum conveying system, which includes a fire control pipe network, a first fire control branch pipe, a second fire control branch pipe, a third fire control branch pipe, sprinkler heads, a sound and light alarm and a controller;

[0007] The fire protection pipe network includes a pretreatment area pipe network connected to reclaimed water and a ground floor pipe network. The pretreatment area pipe network is connected to the reclaimed water pipeline through a first reclaimed water branch pipe, and the ground floor pipe network is connected to the reclaimed water pipeline through a second reclaimed water branch pipe. A water pump and a pneumatic tank are provided on the reclaimed water pipeline, and wet alarm valves are respectively provided on the first reclaimed water branch pipe and the second reclaimed water branch pipe. The wet alarm valve is in a normally closed state, and a pressure switch is provided inside the wet alarm valve, and the pressure switch forms a linkage with the water pump.

[0008] One end of the first fire branch pipe is connected to the pretreatment area pipe network, and the other end extends above the medium grille pretreatment system, the fine grille pretreatment system, and the sand and water separator pretreatment system respectively. Fine grille spray pipes, medium grille spray pipes, and sand and water separator spray pipes are respectively provided on the first fire branch pipe. Flow indicators and a plurality of spray heads are respectively provided on the fine grille spray pipes, the medium grille spray pipes, and the sand and water separator spray pipes.

[0009] One end of the second fire branch pipe is connected to the pretreatment area pipe network, and the other end extends above the coarse grille pretreatment system. A flow indicator and a plurality of spray heads are provided on the second fire branch pipe.

[0010] One end of the third fire branch pipe is connected to the ground floor pipe network, and the other end extends above the vacuum conveying system. A flow indicator and a plurality of spray heads are provided on the third fire branch pipe.

[0011] The controller is respectively connected to the water pump, the pneumatic tank, the wet alarm valve, the flow indicator, and the sound and light alarm.

[0012] Preferably, the spray head adopts a glass bulb spray head or a chrome-plated spray head.

[0013] Preferably, it further includes an exhaust pipe and an end drainage device.

[0014] The exhaust pipe is respectively connected to the first fire branch pipe, the second fire branch pipe, and the third fire branch pipe, and an exhaust valve is provided on the exhaust pipe.

[0015] The end drainage device is respectively connected to the first fire branch pipe, the second fire branch pipe, and the third fire branch pipe.

[0016] The fire automatic sprinkler device for the pretreatment grid residue vacuum conveying system of a sewage treatment plant provided by the present utility model specifically has the following advantages:

[0017] 1. The present utility model can automatically give a sound and light alarm and spray water for fire extinguishing with reclaimed water under the condition of no manual control.

[0018] 2. The present utility model adds fire sprinkler pipes and control, introduces reclaimed water pipes, and takes out a part of reclaimed water from the reclaimed water pipes as sprinkler water.

[0019] 3. The present utility model uses reclaimed water for flushing grille residue (the reclaimed water can be self-sufficient), which greatly reduces the use and maintenance costs compared with the fire water used in traditional fire protection systems.

[0020] 4. The present utility model fundamentally solves the potential fire safety hazards existing in the vacuum conveying, heating and drying system of grille residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the automatic fire sprinkler device for the vacuum conveying system of pretreatment grille residue of the present utility model;

[0022] Figure 2 is a schematic layout diagram of the fire protection pipeline in the pretreatment area of the present utility model;

[0023] Figure 3 is a schematic layout diagram of the fire protection pipeline on the ground floor of the present utility model;

[0024] Wherein, 1. Water pump; 2. Pressure tank; 3. Wet alarm valve; 4. Pipeline network in the pretreatment area; 5. Pipeline network on the ground floor; 6. Water flow indicator; 7. Sprinkler head; 8. Controller; 9. Acousto-optic alarm; 10. End drainage device; 11. Reclaimed water pipeline; 12. First reclaimed water branch pipe; 13. Second reclaimed water branch pipe; 14. First fire protection branch pipe; 15. Second fire protection branch pipe; 16. Third fire protection branch pipe; 17. Fine grille sprinkler pipe; 18. Medium grille sprinkler pipe; 19. Sand and water separator sprinkler pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to better understand the above technical solutions of the present utility model, the technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0026] The present utility model is one of the important technologies in the transformation plan of the ultra-clean space in the pretreatment of sewage plants. During the transformation of the ultra-clean space in the pretreatment of sewage plants, considering that during the pretreatment and vacuum conveying of grille residue, pre-treatments such as heating and drying of grille residue are involved, which will generate heat. For safety considerations, a fire protection system needs to be installed to improve the safety of the equipment used in the vacuum conveying process of grille residue, fundamentally solve the potential fire safety hazards existing in the pretreatment and vacuum conveying system of grille residue (grille residue generated by coarse grilles, medium grilles, fine grilles, sand and water separators, etc.), and effectively control and extinguish the initial fire.

[0027] Combined with Figure 1As shown, the utility model proposes an automatic fire sprinkler device for a vacuum conveying system of pre-treatment screens in a sewage treatment plant, including a fire pipe network, a first fire branch pipe 14, a second fire branch pipe 15, a third fire branch pipe 16, a sprinkler head 7, an audible and visual alarm 9, and a controller 8. The utility model arranges a fire pipe above the vacuum conveying system of pre-treatment screens in a sewage treatment plant, and adds a controller 8 and an audible and visual alarm 9. When a fire occurs, the sprinkler head 7 automatically sprays water and works synchronously with other fire-fighting devices, and the audible and visual alarm 9 sounds an alarm, so that the initial fire can be effectively controlled and extinguished; in addition, since the above-mentioned automatic fire sprinkler device is arranged in the sewage treatment plant, the fire pipe network can be introduced into the reclaimed water pipe 11, and only a part of the reclaimed water from the reclaimed water pipe 11 needs to be taken out as spraying water, which can be self-sufficient. Compared with the use of fire water in the traditional fire-fighting system, the use and maintenance costs are greatly reduced.

[0028] Combination Figure 1 , Figure 2 , Figure 3 As shown, the fire fighting pipe network includes a pre-treatment area pipe network 4 and a ground layer pipe network 5 connected to the reclaimed water. The pre-treatment area pipe network 4 is connected to the reclaimed water pipeline 11 through the first reclaimed water branch pipe 12, and the ground layer pipe network 5 is connected to the reclaimed water pipeline 11 through the second reclaimed water branch pipe 13; the reclaimed water pipeline 11 is provided with a water pump 1 and a pressure tank 2, and the first reclaimed water branch pipe 12 and the second reclaimed water branch pipe 13 are respectively provided with a wet alarm valve 3; the wet alarm valve 3 is in a normally closed state, and a pressure switch is provided in the wet alarm valve 3, and the pressure switch is interlocked with the water pump 1; the pressure tank 2 is used to maintain the air pressure in the system pipeline so that water can be quickly introduced into the fire fighting pipe network when a fire occurs. When a fire occurs, the sprinkler head 7 at the corresponding position opens after reaching a certain temperature, and the wet alarm valve 3 and the pressure switch in the valve will automatically open, and the pressure switch will transmit a signal to the controller 8, and the controller 8 will issue an instruction to start the water pump 1 according to the linkage logic. After receiving the start signal, the water pump 1 will automatically start and introduce the reclaimed water into the fire fighting pipe network.

[0029] Combination Figure 2 As shown, one end of the first fire branch pipe 14 is connected to the pretreatment area pipe network 4, and the other end extends to the upper part of the medium grid pretreatment system, the fine grid pretreatment system and the sand-water separator pretreatment system; the first fire branch pipe 14 is respectively provided with a fine grid spray pipe 17, a medium grid spray pipe 18 and a sand-water separator spray pipe 19; the fine grid spray pipe 17, the medium grid spray pipe 18 and the sand-water separator spray pipe 19 are respectively provided with a water flow indicator 6 and a plurality of spray heads 7. One end of the second fire branch pipe 15 is connected to the pretreatment area pipe network 4, and the other end extends to the upper part of the coarse grid pretreatment system; the second fire branch pipe 15 is provided with a water flow indicator 6 and a plurality of spray heads 7.

[0030] Combination Figure 3As shown, one end of the third fire branch pipe 16 is connected to the ground layer pipe network 5, and the other end extends to the top of the vacuum conveying system; the third fire branch pipe 16 is provided with a water flow indicator 6 and a plurality of sprinkler heads 7. When a fire occurs, the water in the corresponding position pipe changes from static to flowing, and the water flow indicator 6 on the corresponding pipe is activated and sends a signal to notify the controller 8.

[0031] Combination Figure 1 As shown, the controller 8 is connected to the water pump 1, the air pressure tank 2, the wet alarm valve 3, the water flow indicator 6, and the sound and light alarm 9 respectively. When a fire occurs, the ambient temperature near the fire source rises rapidly, and the sprinkler head 7 near the fire source opens and sprays water after reaching a certain temperature, and the water in the corresponding pipe begins to flow. The water flow indicator 6 sends a water flow signal to the controller 8, and the corresponding wet alarm valve 3 and the pressure switch in the valve are automatically opened. The pressure switch transmits the signal to the controller 8. The controller 8 issues an instruction to start the water pump 1 according to the signals transmitted by the wet alarm valve 3 and the water flow indicator 6, and simultaneously starts the sound and light alarm 9 to alarm. After receiving the start signal, the water pump 1 automatically starts to operate, introduces the reclaimed water into the fire pipe network, and sprays water to the area where the fire occurs; the air pressure tank 2 transmits information such as the pressure state to the controller 8, and can keep the pressure in the fire pipe network stable, especially when a fire occurs, to ensure that the water pressure in the pipe network remains stable at the initial stage of the device startup, thereby improving the water spraying effect.

[0032] In a specific embodiment, the spray head 7 is a glass ball spray head 7 or a chrome-plated spray head 7. When the ambient temperature near the spray head 7 reaches a certain temperature, the glass ball or chrome-plated spray head 7 melts, and the water in the tube is automatically sprayed out.

[0033] Combination Figure 1 As shown, the fire sprinkler device also includes an exhaust pipe (not shown in the figure) and a terminal drainage device 10. The exhaust pipe is connected to the first fire branch pipe 14, the second fire branch pipe 15, and the third fire branch pipe 16 respectively. The exhaust pipe is provided with an exhaust valve, and the exhaust valve can be exhausted manually or in conjunction with other equipment. The terminal drainage device 10 is connected to the first fire branch pipe 14, the second fire branch pipe 15, and the third fire branch pipe 16 respectively. The terminal drainage device 10 is used to discharge water in the pipeline during system maintenance, testing, or to prevent freezing.

[0034] The renovation of the pre-treatment ultra-clean space of a sewage plant is a major engineering project in Shanghai and is also the first application in the pre-treatment area of a sewage plant. The utility model is one of the important technologies in the renovation plan of the pre-treatment ultra-clean space of a sewage plant, and improves the renovation plan of the pre-treatment ultra-clean space of a sewage plant. In the event of a fire, it uses recycled water for automatic spraying and sounds an alarm, which can solve the hidden dangers in fire safety of heating and drying equipment during the vacuum transportation of grid slag, and effectively control and extinguish initial fires.

[0035] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. As long as within the scope of the essential spirit of the present utility model, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present utility model.

Claims

1. An automatic fire sprinkler device for a sewage treatment plant's pre-treatment grid residue vacuum conveying system, characterized in that, It includes a fire-fighting pipe network, a first fire-fighting branch pipe, a second fire-fighting branch pipe, a third fire-fighting branch pipe, sprinkler heads, an audible and visual alarm, and a controller; The fire-fighting pipe network includes a pretreatment area pipe network connected to reclaimed water and a ground floor pipe network. The pretreatment area pipe network is connected to the reclaimed water pipeline through a first reclaimed water branch pipe, and the ground floor pipe network is connected to the reclaimed water pipeline through a second reclaimed water branch pipe. A water pump and a pressure tank are provided on the reclaimed water pipeline, and wet alarm valves are respectively provided on the first reclaimed water branch pipe and the second reclaimed water branch pipe. The wet alarm valve is normally closed, a pressure switch is provided inside the wet alarm valve, and the pressure switch forms a linkage with the water pump; One end of the first fire-fighting branch pipe is connected to the pretreatment area pipe network, and the other end extends above the medium grid pretreatment system, the fine grid pretreatment system, and the sand and water separator pretreatment system respectively. A fine grid sprinkler pipe, a medium grid sprinkler pipe, and a sand and water separator sprinkler pipe are respectively provided on the first fire-fighting branch pipe. Water flow indicators and multiple sprinkler heads are respectively provided on the fine grid sprinkler pipe, the medium grid sprinkler pipe, and the sand and water separator sprinkler pipe; One end of the second fire-fighting branch pipe is connected to the pretreatment area pipe network, and the other end extends above the coarse grid pretreatment system. A water flow indicator and multiple sprinkler heads are provided on the second fire-fighting branch pipe; One end of the third fire-fighting branch pipe is connected to the ground floor pipe network, and the other end extends above the vacuum conveying system. A water flow indicator and multiple sprinkler heads are provided on the third fire-fighting branch pipe; The controller is respectively connected to the water pump, the pressure tank, the wet alarm valve, the water flow indicator, and the audible and visual alarm.

2. The automatic fire sprinkler device for the sewage treatment plant's pre-treatment grid residue vacuum conveying system according to claim 1, characterized in that: The sprinkler head adopts a glass bulb sprinkler head or a chrome-plated sprinkler head.

3. The automatic fire sprinkler device for the sewage treatment plant's pretreatment grid residue vacuum conveying system according to claim 1, characterized in that: It also includes an exhaust pipe and an end drainage device; The exhaust pipe is respectively connected to the first fire-fighting branch pipe, the second fire-fighting branch pipe, and the third fire-fighting branch pipe, and an exhaust valve is provided on the exhaust pipe; The end drainage device is respectively connected to the first fire-fighting branch pipe, the second fire-fighting branch pipe, and the third fire-fighting branch pipe.

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