A system for protecting bags by circulating water in an open-circuit water jacket

Abstract

The utility model discloses a system for protecting bags by using open-circuit water jacket circulating water, comprising a bag dust collector, an inlet flue of the bag dust collector being connected to a continuous refining furnace, a circulating water return pipe on the continuous refining furnace being connected to an open cooling tower, the system also comprising a circulating water open-circuit system, a delivery pump and a spray system, the circulating water open-circuit system comprising a circulating water open-circuit water pipe and an open-circuit circulating water pool; the water inlet end of the delivery pump is connected to the open-circuit circulating water pool, and the water outlet end of the delivery pump is connected to the spray system; the spray system comprises an atomizing spray gun, an automatic control box, a temperature measuring thermocouple and a high-pressure air source, the atomizing spray gun is respectively connected to the corresponding delivery pump and the high-pressure air source through a water spray inlet pipe and a compressed air pipe, and the temperature measuring thermocouple is arranged on the inlet flue at the inlet of the bag dust collector; the system automatically opens the water jacket circulating water, effectively protects the bag dust collector, and reduces environmental risks.

Description

Technical Field

[0001] The utility model relates to the technical field of recycled copper production process equipment, in particular to a system utilizing open-circuit water jacket circulating water to protect cloth bags. Background Art

[0002] In the process of recycled copper production, the operating temperature of the continuous refining furnace is 1200℃, and water jackets are installed at key positions such as the feed port door frame and the furnace top arch to support the furnace body. In order to control costs, the continuous refining furnace water jacket does not use desalted water or soft water, but uses city tap water as a circulating cooling medium. The return water of the water jacket circulating water is cooled by an open cooling tower. When the water jacket circulating water is cooled, it comes into contact with the outside air, and the content of suspended matter and biological slime in the water continues to increase and deposit into the water jacket, affecting the heat exchange effect, and eventually causing the water jacket to be damaged and scrapped, forcing the continuous refining furnace to be shut down for maintenance.

[0003] The flue gas generated in the continuous refining furnace production is purified by bag dust collector. The flue gas temperature at the bag inlet is usually 150-200℃, so PTFE filter material with a temperature resistance of 240℃ is selected. However, in production practice, there are drastic fluctuations in the working conditions of the continuous refining furnace production. At this time, the flue gas temperature at the bag inlet will be high for a short time (3min-4h), up to 350℃, causing the bag filter material to burn. Therefore, it is necessary to design a system that can effectively warn and cool the flue gas. Utility Model Content

[0004] The purpose of the utility model is to provide a system for protecting bags by using open-circuit water jacket circulating water in view of the above situation. The system automatically opens the circuit of the water jacket circulating water, effectively protecting the bag dust collector and reducing environmental risks.

[0005] The specific scheme of the utility model is: a system using open-circuit water jacket circulating water to protect bags, including a bag dust collector, the inlet flue of the bag dust collector is connected to a continuous refining furnace, and the circulating water return pipe on the continuous refining furnace is connected to an open cooling tower. The system also includes a circulating water open-circuit system, a delivery pump and a spray system. The circulating water open-circuit system includes a circulating water open-circuit water pipe and an open-circuit circulating water pool, wherein one end of the circulating water open-circuit water pipe is connected to the circulating water return pipe, and the other end of the circulating water open-circuit water pipe is connected to the circulating water return pipe. to the top of the open-circuit circulating water pool; the water inlet end of the delivery pump is connected to the open-circuit circulating water pool, and the water outlet end of the delivery pump is connected to the spray system; the spray system includes an atomizing spray gun, an automatic control box, a temperature measuring thermocouple and a high-pressure air source, the atomizing spray gun is connected to the corresponding delivery pump and the high-pressure air source through a water spray inlet pipe and a compressed air pipe, respectively, and the temperature measuring thermocouple is arranged on the inlet flue at the inlet of the bag filter; the delivery pump, the high-pressure air source and the temperature measuring thermocouple are all electrically controlled and connected to the automatic control box.

[0006] Furthermore, a filter is installed on the water pipe at the water inlet end of the delivery pump in the utility model.

[0007] Furthermore, a water volume regulating valve and a flow meter are also provided on the water spray inlet pipe between the atomizing spray gun and the delivery pump in the utility model.

[0008] Furthermore, the high-pressure air source in the utility model is compressed air supplied by an external device, and a switch valve is provided on the compressed air duct, and the switch valve is electrically connected to the automatic control box.

[0009] Furthermore, a float valve is also provided on the upper part of the open-circuit circulating water pool in the utility model, and the float valve is used to control the liquid level in the open-circuit circulating water pool.

[0010] Furthermore, the water volume regulating valve in the utility model is a solenoid valve.

[0011] Furthermore, the delivery pump in the utility model is a centrifugal pump; the temperature measuring thermocouple is a K-graded thermocouple.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model automatically opens the circuit of the water jacket circulating water, improves the water quality of the water jacket cooling water, prolongs the life of the water jacket and the furnace life of the continuous refining furnace, protects the bag dust collector and reduces environmental risks.

[0014] 2. The overall operating cost of the utility model is low: it saves the cost of improving the cooling water quality of the water jacket, saves the cost of replacing the bag and water jacket and the cost of overhauling the continuous refining furnace.

[0015] 3. The utility model system has a short process, low cost, simple operation, does not affect the normal production of the continuous refining furnace, and has low application difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] In the figure: 1—continuous refining furnace, 2—circulating water return pipe, 3—open cooling tower, 4—bag dust collector, 5—compressed air duct, 6—inlet flue of bag dust collector, 7—atomizing spray gun, 8—flow meter, 9—on-off valve, 10—water volume regulating valve, 11—delivery pump, 12—filter, 13—circulating water open circuit pipe, 14—float valve, 15—open circuit circulating water pool, 16—automatic control box, 17—temperature measuring thermocouple. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings of the utility model to clearly and completely describe the technical solution of the utility model. It is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the utility model. In the description of the utility model, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1The utility model is a system for protecting bags by circulating water in an open-circuit water jacket, comprising a bag filter 4, an inlet flue 6 of the bag filter connected to a continuous refining furnace 1, a circulating water return pipe 2 on the continuous refining furnace connected to an open cooling tower 3, the system also comprising a circulating water open-circuit system, a delivery pump 11 and a spray system, the circulating water open-circuit system comprising a circulating water open-circuit water pipe 13 and an open-circuit circulating water pool 15, wherein one end of the circulating water open-circuit water pipe is connected to the circulating water return pipe, and the other end of the circulating water open-circuit water pipe is connected to the top of the open-circuit circulating water pool; further, a float valve 14 is also provided on the upper part of the open-circuit circulating water pool in the utility model, and the float valve is used to control the liquid level in the open-circuit circulating water pool; the water inlet end of the delivery pump is connected to the open-circuit circulating water pool, and the water outlet end of the delivery pump is connected to the spray system; further, the water inlet end of the delivery pump in the utility model A filter 12 is installed on the water pipe; the spray system includes an atomizing spray gun 7, an automatic control box 16, a temperature measuring thermocouple 17 and a high-pressure air source, the atomizing spray gun is connected to the corresponding delivery pump and the high-pressure air source through the water spray inlet pipe and the compressed air pipe 5 respectively, and the temperature measuring thermocouple is arranged on the inlet flue at the entrance of the bag filter 4; further, a water volume regulating valve 10 and a flow meter 8 are also arranged on the water spray inlet pipe between the atomizing spray gun and the delivery pump in the utility model, and further, the water volume regulating valve in the utility model is a solenoid valve; further, the high-pressure air source in the utility model is compressed air supplied by an external device, and a switch valve 9 is arranged on the compressed air pipe, and the switch valve is electrically connected to the automatic control box; further, the delivery pump in the utility model is a centrifugal pump; the temperature measuring thermocouple is a K-graded thermocouple; the delivery pump, the high-pressure air source, and the temperature measuring thermocouple are all electrically controlled and connected to the automatic control box.

[0021] See also Figure 1 The technical solution of the utility model is: a system using open-circuit water jacket circulating water to protect the bag, which is mainly composed of a circulating water open-circuit system, a delivery pump, and a spray system.

[0022] The open-circuit circulating water system consists of an open-circuit circulating water pool and open-circuit circulating water pipes. The volume of the open-circuit circulating water pool is 20m 3 The starting point of the open-circuit circulating water pipe is connected to the jacket circulating water return pipe; the end leads to the top of the open-circuit circulating water pool and is equipped with a float valve.

[0023] The water inlet pipe of the delivery pump is connected to the open-circuit circulating water pool, and a Y-type filter is installed on the water inlet pipe. The delivery pump is a centrifugal pump with a specification of 2m 3 / h, lift 42m.

[0024] The spray system consists of an atomizing spray gun, an automatic control box, and a temperature measuring thermocouple. The atomizing spray gun is installed on the inlet flue of the bag filter, and its water inlet pipe is connected to the outlet of the centrifugal pump, and its air inlet is connected to the compressed air duct; a glass rotor flowmeter and a water volume regulating valve (ball valve) are installed on the water inlet pipe, and a switch valve (solenoid valve) is installed on the air inlet pipe. The atomizing spray gun uses 0.3MPa~0.5MPa compressed air as the atomizing medium, and atomizes the open-circuit circulating water and passes it into the flue gas. The maximum water flow of the atomizing spray gun is 66L / min. The temperature measuring thermocouple is installed on the inlet flue of the bag filter, between the inlet of the bag filter and the atomizing spray gun. The temperature measuring thermocouple is a K-divided thermocouple with a measuring range of 20~400℃. The automatic control box is equipped with a CPU module, an analog module, a text display module, etc., which receives the analog signal of the thermocouple and converts it into a digital quantity to realize interlocking control. The automatic control box is connected to the K-divided thermocouple, the centrifugal pump, and the solenoid valve.

[0025] During the production of the continuous refining furnace, the jacket circulating water system is put into operation, and the open-circuit circulating water enters through the circulating water open-circuit water pipe, and flows into the open-circuit circulating water pool by gravity, and settles and separates part of the sludge and large particles of impurities. When the water level in the open-circuit circulating water pool reaches the upper limit, the float valve automatically cuts off the water inlet to the open-circuit circulating water pool.

[0026] When the temperature measuring thermocouple detects that the smoke temperature at the inlet of the bag filter is higher than 220℃, the automatic control box interlocks to start the centrifugal pump (i.e., the delivery pump), pressurizes the open-circuit circulating water in the open-circuit circulating water pool to 0.4MPa and delivers it to the atomizing spray gun; the automatic control box interlocks to start the switch valve at the same time, and passes compressed air to the atomizing spray gun, atomizing the open-circuit circulating water into small droplets, which enter the flue gas and evaporate and vaporize rapidly. The impurities carried by the open-circuit circulating water are converted into smoke and dust, which are captured by the bag filter. When the temperature measuring thermocouple detects that the smoke temperature drops below 180℃, the automatic control box interlocks to close the centrifugal pump and the solenoid valve. According to the usage, adjust the ball valve opening, adjust the open-circuit circulating water flow rate sprayed by the atomizing spray gun, and control the inlet temperature of the bag filter at 180℃~220℃.

[0027] In the above process, the various structures are interlocked and coordinated to achieve the effect of protecting the bag dust collector.

[0028] The utility model automatically opens the circuit of the jacket circulating water, improves the water quality of the jacket cooling water, prolongs the life of the jacket and the continuous refining furnace, protects the bag filter and reduces environmental risks. The overall operating cost of the utility model is low: it saves the cost of improving the jacket cooling water quality, the cost of replacing the bag and jacket, and the cost of overhauling the continuous refining furnace. The utility model has a short system flow, low cost, easy operation, does not affect the normal production of the continuous refining furnace, and has low application difficulty.

Claims

1. A system for protecting bags by circulating water in an open circuit water jacket, comprising a bag filter, the inlet flue of the bag filter is connected to a continuous refining furnace, and the circulating water return pipe on the continuous refining furnace is connected to an open cooling tower, characterized in that: The system also includes a circulating water open-circuit system, a delivery pump and a spray system, wherein the circulating water open-circuit system includes a circulating water open-circuit water pipe and an open-circuit circulating water pool, wherein one end of the circulating water open-circuit water pipe is connected to the circulating water return pipe, and the other end of the circulating water open-circuit water pipe is connected to the top of the open-circuit circulating water pool; the water inlet end of the delivery pump is connected to the open-circuit circulating water pool, and the water outlet end of the delivery pump is connected to the spray system; the spray system includes an atomizing spray gun, an automatic control box, a temperature measuring thermocouple and a high-pressure air source, the atomizing spray gun is connected to the corresponding delivery pump and the high-pressure air source through a water spray inlet pipe and a compressed air pipe, respectively, and the temperature measuring thermocouple is arranged on the inlet flue at the inlet of the bag filter; the delivery pump, the high-pressure air source and the temperature measuring thermocouple are all electrically controlled and connected to the automatic control box.

2. A system for protecting bags by using open-circuit water jacket circulation water according to claim 1, characterized in that: A filter is arranged on the water pipe at the water inlet end of the delivery pump.

3. A system for protecting bags by using open-circuit water jacket circulation water according to claim 1, characterized in that: A water volume regulating valve and a flow meter are also provided on the water spray inlet pipe between the atomizing spray gun and the delivery pump.

4. A system for protecting bags by using open-circuit water jacket circulation water according to claim 1, characterized in that: The high-pressure air source is compressed air supplied by an external device, and a switch valve is provided on the compressed air duct, and the switch valve is electrically connected to the automatic control box.

5. A system for protecting bags by using open-circuit water jacket circulation water according to claim 1, characterized in that: A float valve is also provided on the upper part of the open-circuit circulating water pool, and the float valve is used to control the liquid level in the open-circuit circulating water pool.

6. A system for protecting bags by using open-circuit water jacket circulation water according to claim 3, characterized in that: The water volume regulating valve is a solenoid valve.

7. A system for protecting bags by using open-circuit water jacket circulation water according to claim 1, characterized in that: The delivery pump is a centrifugal pump; the temperature measuring thermocouple is a K-graded thermocouple.

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