An auxiliary fire protection system for a paper machine and its usage method

Abstract

This invention discloses an auxiliary fire suppression system for a paper machine and its usage method. The auxiliary fire suppression system includes a second sprinkler system and a first sprinkler system for blocking fire sources. The first sprinkler system includes sprinkler pipes perpendicular to the traveling rails and respectively located above the wire section, drying section, and the paper machine ceiling. The sprinkler pipes are connected to a sprinkler pump via pipes and a fourth control valve. The second sprinkler system is located in the drying section and the paper machine ceiling, and is connected to the sprinkler pump via pipes and a fifth control valve. The sprinkler pump is connected to a storage tank via pipes. This invention can block and isolate fires, and fire water can reach the traveling rails, hot air drying section, and the ceiling mezzanine of the workshop. Employees can react quickly to fires, and the system is conveniently and quickly operated via the paper machine's DCS system. It does not add new energy-consuming equipment; it consists of pipes and valves, and the corresponding valves can be opened when needed, effectively providing double protection for key areas of the workshop with dual fire suppression systems.

Description

Technical Field

[0001] This invention relates to the field of fire protection technology, and in particular to an auxiliary fire protection system for a paper machine and its usage method. Background Technology

[0002] Paper mills, especially those producing tissue paper, generate a large amount of dust during the creping process. The drying process in the drying section uses high-temperature hot air, typically between 350 and 450 degrees Celsius. If an open flame is generated in the drying section, it poses a significant safety risk. Therefore, the proper functioning of the fire protection system is crucial for the safety of paper mills.

[0003] Typically, the fire protection system in a workshop is configured from the factory's main fire protection system, which is supplied with water by a separate fire pump. In northern regions, fire protection systems have the following problems:

[0004] (1) Due to the low winter temperatures, the fire protection system pipes in the workshops of paper mills in the north often freeze and crack, requiring valves to be shut off for maintenance. Sometimes it is also necessary to drain the outdoor pipes in winter to prevent freezing. In the event of a fire, the fire pump needs to fill the fire pipelines before the pressure can be built up, which takes a long time.

[0005] (2) The roof of the paper mill is usually designed to be more than 10m high, and it is difficult for fire-fighting equipment to reach this height immediately to extinguish the fire, so the response is not fast enough.

[0006] (3) Taking the Aselli 5.6m wide paper machine as an example, the key locations prone to fire are the overhead crane tracks (elevation 12m), the hot air drying section (elevation 10m), and the workshop ceiling mezzanine (height 18m). The existing workshop fire protection system has a pressure of 6-8 bar, making it difficult for the fire protection system's water to reach this height. In addition, fires often occur in the hot air drying section, and the fire can spread along the overhead crane tracks to the paper machine wire section and rewinding area.

[0007] Increasing the overall pressure of the fire protection system would not only be too costly, but also pose safety hazards for personnel during operation. Summary of the Invention

[0008] Purpose of the invention: The present invention aims to provide an auxiliary fire protection system for paper machines that is independent of the fire protection system in paper mill workshops; another purpose of the present invention is to provide a method for using the auxiliary fire protection system for paper machines.

[0009] Technical Solution: The auxiliary fire protection system for the paper machine of the present invention has symmetrically arranged traveling tracks on both sides of the paper machine. The auxiliary fire protection system for the paper machine includes a second sprinkler system and a first sprinkler system for blocking fire sources. The first sprinkler system includes sprinkler pipes perpendicular to the traveling tracks and respectively located above the wire section, the drying section, and the ceiling of the paper machine. The sprinkler pipes are connected to the sprinkler pump through pipes and a fourth control valve. The second sprinkler system is located in the drying section and the ceiling of the paper machine, and is connected to the sprinkler pump through pipes and a fifth control valve. The sprinkler pump is connected to a storage tank through pipes.

[0010] Furthermore, a fire water pipe is installed inside the track, and the fire water pipe is connected to the first sprinkler system through pipes and valves.

[0011] Furthermore, it also includes auxiliary fire water pipes located on the ground, which are connected to the sprinkler pump via pipes and a third control valve.

[0012] Furthermore, it also includes a second valve, which is located near the sprinkler pump. After passing through the second valve, the pipeline splits into three routes, which are respectively connected to the first sprinkler system, the second sprinkler system, and the auxiliary fire water pipe.

[0013] Preferably, the spray pump is a high-pressure spray pump for paper machines.

[0014] Furthermore, the spray pump is connected to the high-pressure spray system of the paper machine via a pipe and a first valve.

[0015] Preferably, the first valve, the second valve, the fourth valve, and the fifth valve are all control valves, and the opening and closing of the control valves are controlled by the paper machine DCS control system.

[0016] Preferably, the pressure of the high-pressure spray pump of the paper machine is 40 bar.

[0017] The method of using the auxiliary fire protection system for the paper machine described in this invention is as follows:

[0018] When a fire breaks out on the railway tracks, the first sprinkler system is activated to block the fire source; if the fire is difficult to control, the fire hoses at the railway tracks are used to assist in blocking and extinguishing the fire.

[0019] When a fire occurs in the paper machine drying section or the paper machine ceiling, the second sprinkler system will be activated to assist in firefighting; if the fire spreads to the wire section and rewinding area, the same procedure will be followed as when a fire occurs on the crane track.

[0020] Open the auxiliary fire water pipes located on the ground to assist in ground firefighting.

[0021] Preferably, the spray pump supplies liquid only to the first and second spray systems.

[0022] Beneficial Effects: Compared with existing technologies, the significant advantages of this invention are: 1. The auxiliary fire protection system utilizes the existing high-pressure sprinkler pumps on the paper machine to design an auxiliary fire protection system, which is activated in the event of a fire to block and isolate the fire. The high-pressure sprinkler pumps operate 24 hours a day, supporting the auxiliary fire protection system around the clock. 2. The auxiliary fire protection system uses high-pressure sprinkler pumps on the paper machine, resulting in a higher system pressure than the workshop fire protection system. Fire water can reach the overhead crane tracks, hot air drying section, and the ceiling mezzanine of the workshop. 3. Employees can respond quickly to fires and the system can be controlled conveniently and quickly via the paper machine's DCS system. 4. The auxiliary fire protection system does not add new energy-consuming equipment; it consists of pipes and valves. The corresponding valves are opened only when needed, effectively providing double fire protection systems for key areas of the workshop, offering double insurance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] The auxiliary fire protection system of the paper machine described in this invention is independent of the fire protection system of the paper mill workshop. It utilizes the existing high-pressure sprinkler pump of the paper machine to design an auxiliary fire protection system, which is activated when a fire occurs to block and isolate the fire. The high-pressure sprinkler pump works 24 hours a day to support the operation of the auxiliary fire protection system.

[0026] The paper machine's auxiliary fire suppression system is located in key areas prone to fire, such as the traveling rails (elevation 12m), the hot air drying section (elevation 10m), and the workshop ceiling mezzanine (height 18m), as well as the paper machine wire section and rewinding area where fire can spread along the traveling rails.

[0027] The traveling rails 6 are symmetrically arranged on both sides of the paper machine. The paper machine's auxiliary fire protection system includes a second sprinkler system 2, a first sprinkler system 1 for blocking fire sources, and an auxiliary fire water pipe 3 located on the ground. The first sprinkler system 1 includes sprinkler pipes perpendicular to the traveling rails and located above the wire section, drying section, and paper machine ceiling. The sprinkler pipes are connected to the sprinkler pump 4 via pipes and a fourth control valve 11. A fire water pipe 5 is arranged inside the traveling rails 6, and the fire water pipe is connected to the first sprinkler system 1 via pipes and a manual valve. The second sprinkler system 2 is located in the drying section and paper machine ceiling, and is connected to the sprinkler pump 4 via pipes and a fifth control valve 21. The auxiliary fire water pipe 3 is connected to the sprinkler pump 4 via pipes and a third control valve 31. The sprinkler pump 4 is connected to a storage tank via pipes. The sprinkler pump is a high-pressure sprinkler pump for the paper machine with a pressure of 40 bar.

[0028] The liquid is divided into two paths by the high-pressure spray pump on the paper machine. One path connects to the high-pressure spray system of the paper machine through a pipeline and the first valve. The other path, after passing through the second valve, is divided into three paths, connecting to the first spray system, the second spray system, and the auxiliary fire water pipe, respectively. The opening and closing of the first spray system, the second spray system, and the auxiliary fire water pipe are controlled by the fourth control valve 21, the fifth control valve 21, and the third control valve 31, respectively. Preferably, the first valve 8, the second valve 7, the fourth valve 11, and the fifth valve 21 are all control valves, and their opening and closing are controlled by the paper machine DCS control system. Employees can operate these valves within the paper machine DCS system for rapid response to fires, making the operation convenient and quick.

[0029] The normal operation of the workshop's fire protection system according to the emergency plan in the event of a fire does not conflict with this invention. The method of using the auxiliary fire protection system for the paper machine described in this invention is as follows:

[0030] When a fire breaks out on the railway tracks, the first sprinkler system is activated to block the fire source; if the fire is difficult to control, the fire hoses at the railway tracks are used to assist in blocking and extinguishing the fire.

[0031] When a fire occurs in the paper machine drying section or the paper machine ceiling, the second sprinkler system will be activated to assist in firefighting; if the fire spreads to the wire section and rewinding area, the same procedure will be followed as when a fire occurs on the crane track.

[0032] Open the auxiliary fire water pipes located on the ground to assist in ground firefighting.

[0033] In case of an emergency, the first control valve can be shut off, and the sprinkler pumps can fully support the paper machine's auxiliary fire suppression system, providing greater water volume and pressure.

Claims

1. An auxiliary fire-fighting system for a paper machine, wherein symmetrical traveling rails (6) are provided on both sides of the paper machine, characterized in that, The system includes a second sprinkler system (2) and a first sprinkler system (1) for blocking fire sources. The first sprinkler system (1) includes sprinkler pipes that are perpendicular to the traveling rail and are respectively installed above the wire section, the drying section and the paper machine ceiling. The sprinkler pipes are connected to the sprinkler pump (4) through pipes and a fourth valve (11). The second sprinkler system (2) is installed in the drying section and the paper machine ceiling. The second sprinkler system (2) is connected to the sprinkler pump (4) through pipes and a fifth valve (21). The sprinkler pump (4) is connected to the liquid storage tank through pipes. The sprinkler pump (4) is a high-pressure sprinkler pump for the paper machine.

2. The auxiliary fire suppression system for the paper machine according to claim 1, characterized in that, Fire water pipes (5) are installed inside the track, and the fire water pipes (5) are connected to the first sprinkler system (1) through pipes and valves.

3. The auxiliary fire suppression system for the paper machine according to claim 1, characterized in that, It also includes an auxiliary fire water pipe (3) located on the ground, which is connected to the sprinkler pump (4) via a pipe and a third control valve (31).

4. The auxiliary fire-fighting system for the paper machine according to claim 3, characterized in that, It also includes a second valve (7), which is located near the sprinkler pump (4). After passing through the second valve (7), the pipeline is divided into three paths, which are respectively connected to the first sprinkler system (1), the second sprinkler system (2) and the auxiliary fire water pipe (3).

5. The auxiliary fire-fighting system for the paper machine according to claim 4, characterized in that, The spray pump (4) is connected to the high-pressure spray system of the paper machine through a pipe and a first valve (8).

6. The auxiliary fire-fighting system for the paper machine according to claim 5, characterized in that, The first valve (8), the second valve (7), the fourth valve (11) and the fifth valve (21) are all control valves, and the opening and closing of the control valves are controlled by the paper machine DCS control system.

7. The auxiliary fire-fighting system for the paper machine according to claim 4, characterized in that, The pressure of the high-pressure spray pump of the paper machine is 40 bar.

8. A method of using an auxiliary fire suppression system for a paper machine according to any one of claims 1-7, characterized in that, The specific usage method is as follows: When a fire breaks out on the railway tracks, the first sprinkler system is activated to block the fire source; if the fire is difficult to control, the fire hoses at the railway tracks are used to assist in blocking and extinguishing the fire. When a fire occurs in the paper machine drying section or the paper machine ceiling, the second sprinkler system is activated to assist in fire suppression; if the fire spreads to the wire section and rewinding area, the first sprinkler system is activated to block the fire source; if the fire is difficult to control, the fire hoses at the crane tracks are used to assist in blocking and extinguishing the fire. Open the auxiliary fire water pipes located on the ground to assist in ground firefighting.

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