Paperboard composite condensate water recycling system

Abstract

The utility model discloses a paperboard composite condensate water recycling system which comprises a plurality of condensate water recycling pipes, the water outlet ends of the condensate water recycling pipes are all connected to a gas-liquid separator through a water collecting pipe, and a gas outlet of the gas-liquid separator is connected to a steam jet device through an exhaust pipe. A water outlet of the gas-liquid separator is connected to a gas inlet of the water collecting tank through a first water outlet pipe, a water outlet of the water collecting tank is connected to a water inlet of the water delivery pump, and two water outlets of the water delivery pump are communicated with water inlets of the first water storage tank and the second water storage tank through pipelines respectively. A water outlet of the first water storage tank is connected to one water inlet of the water suction pump through a second water outlet pipe, a water inlet of the second water storage tank is connected to the other water inlet of the water suction pump through a third water outlet pipe, and a water outlet of the water suction pump is communicated with a water inlet of the steam generator through a filtering device. And environment pollution and water resource waste are avoided, and the stability of machining quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box processing technology, specifically designing a cardboard composite condensate recovery and utilization system. Background Technology

[0002] In the current production process of cardboard boxes for packaging, in order to ensure that the adhesive layer in the cardboard bonding process has adhesiveness, it is often necessary to keep the adhesive layer on the surface of the cardboard near its melting point temperature. The melting point temperature of the adhesive is usually high. In order to ensure that the adhesive layer can maintain the required temperature continuously during the continuous production process, it is often necessary to heat the cardboard with high-temperature steam.

[0003] Therefore, heating paperboard with steam often produces a large amount of condensate. The condensate flows out along the side wall of the paperboard laminating equipment, which not only pollutes the environment and wastes water resources, but also increases the humidity of the production environment, resulting in excessive humidity, which affects the humidity of the paperboard after gluing, and thus affects subsequent processes. Utility Model Content

[0004] This invention provides a paperboard composite condensate recovery and utilization system, which can collect and reuse the condensate generated by steam in paperboard composite equipment to avoid environmental pollution, waste of water resources, and ensure the stability of processing quality.

[0005] A condensate recovery system for paperboard composite equipment includes multiple condensate recovery pipes arranged side-by-side along the conveying direction of the paperboard composite equipment. The outlets of all the condensate recovery pipes are connected to the inlet of a gas-liquid separator via a collection pipe. The gas outlet of the gas-liquid separator is connected to a steam injection device via an exhaust pipe. The water outlet of the gas-liquid separator is connected to the air inlet of a water collection tank via a first water outlet pipe. The water outlet of the water collection tank is connected to the water inlet of a water pump. The two outlets of the water pump are respectively connected to a first water storage tank and a second water storage tank via a pipe. The inlets of the two water storage tanks are connected. A first control valve and a second control valve are respectively installed at the inlet of the first water storage tank and the inlet of the second water storage tank. The outlet of the first water storage tank is connected to one inlet of the water pump through a second outlet pipe. The inlet of the second water storage tank is connected to the other inlet of the water pump through a third outlet pipe. The outlet of the water pump is connected to the inlet of the steam generator through a filter device. A third control valve is installed on the first outlet pipe and a fourth control valve is installed on the second outlet pipe.

[0006] Furthermore, a fifth control valve and a suction pump are also installed on the water collection pipe.

[0007] Furthermore, a sixth control valve is installed on the first water outlet pipe, and a seventh control valve is installed on the exhaust pipe.

[0008] Furthermore, the outlet of the water collection tank is connected to the inlet of the steam injection device, and an eighth control valve is installed on the pipe between the outlet of the water collection tank and the inlet of the steam injection device.

[0009] Furthermore, the air outlet of the water collection tank is also connected to an emergency pressure relief pipe, on which a pressure transmitter and a ninth control valve are installed.

[0010] Furthermore, a first liquid level sensor is installed inside the water collection tank.

[0011] Furthermore, a second liquid level sensor is installed in the first water storage tank, and a third liquid level sensor is installed in the second water storage tank.

[0012] Furthermore, the inlet end of the condensate recovery pipe is connected to a water collection hopper, the upper end of which is connected to the bottom of the cardboard composite equipment.

[0013] Beneficial effects:

[0014] 1. Condensate generated by steam during the paperboard lamination process is collected and centrally recovered through multiple condensate recovery pipes arranged side-by-side along the feeding direction of the paperboard laminating equipment. The condensate is then fed into a gas-liquid separator to separate a small amount of steam from the condensate and discharged through a steam jet device. The separated condensate is then sent to a collection tank for temporary storage and secondary gas-liquid separation. The condensate from the collection tank is then sent to a first and a second water storage tank for storage. Finally, the condensate stored in the first and second water storage tanks is filtered and sent to a steam generator for reuse. This effectively avoids the environmental pollution and water waste caused by condensate in existing technologies, while also preventing the impact on the humidity of the glued paperboard and ensuring the stability of processing quality.

[0015] 2. The first and second water storage tanks form a main and backup water storage structure. The liquid level of the two tanks is detected by the liquid level sensor, so that the tank with the lower liquid level is used for water storage and the tank with the higher liquid level is used for water supply, making the use of this system more flexible.

[0016] 3. An emergency pressure relief scheme is provided on the water collection tank. When the pressure inside the closed water collection tank rises under special circumstances, the eighth control valve will be opened according to the control value set during commissioning to release flash steam to reduce the internal pressure of the water collection tank, thereby improving the safety of the system during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pipeline structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation structure of the condensate recovery pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0020] like Figures 1-2 As shown, a paperboard composite condensate recovery system includes multiple condensate recovery pipes 1 arranged side by side along the conveying direction of the paperboard composite equipment 29. The condensate recovery pipes 1 are correspondingly arranged below each steam pipe 28 connected to the paperboard composite equipment 29. The water inlet end of the condensate recovery pipe 1 is connected to a water collection hopper 30, and the upper end of the water collection hopper 30 is connected to the bottom of the paperboard composite equipment 29. By adopting the above arrangement, the condensate generated by the steam ejected from each steam pipe 28 can be better recovered.

[0021] from Figure 1 It can also be seen that the outlets of the multiple condensate recovery pipes 1 are all connected to the inlet of the gas-liquid separator 5 through the water collection pipe 2. The gas outlet of the gas-liquid separator 5 is connected to the steam injection device 14 through the exhaust pipe 12. The water outlet of the gas-liquid separator 5 is connected to the air inlet of the water collection tank 18 through the first water outlet pipe 6. The water outlet of the water collection tank 18 is connected to the water inlet of the water pump 19. The two water outlets of the water pump 19 are respectively connected to the inlets of the first water storage tank 9 and the second water storage tank 27 through a pipe. The inlet of the water outlet and the inlet of the second water storage tank 27 are respectively equipped with a first control valve 24 and a second control valve 25. The outlet of the first water storage tank 9 is connected to one inlet of the water pump 21 through a second outlet pipe. The inlet of the second water storage tank 27 is connected to the other inlet of the water pump 21 through a third outlet pipe. The outlet of the water pump 21 is connected to the inlet of the steam generator 23 through a filter device 22. A third control valve 11 is provided on the first outlet pipe 6, and a fourth control valve 20 is provided on the second outlet pipe.

[0022] In this embodiment, in order to facilitate the control of the opening and closing of the water collection pipe 2 and improve the condensate recovery efficiency, a fifth control valve 3 and a suction pump 4 are also provided on the water collection pipe 2.

[0023] In this embodiment, a sixth control valve 7 is provided on the first water outlet pipe 6, and a seventh control valve 13 is provided on the exhaust pipe 12.

[0024] In this embodiment, the air outlet of the water collection tank 18 is also connected to the air inlet of the steam injection device 14, and an eighth control valve 15 is also provided on the pipeline between the air outlet of the water collection tank 18 and the air inlet of the steam injection device 14.

[0025] The above design allows for the timely discharge of steam from the water collection tank 18, improving the safety of its operation.

[0026] Furthermore, the air outlet of the water collection tank 18 is also connected to an emergency pressure relief pipe, on which a pressure transmitter 17 and a ninth control valve 16 are installed.

[0027] With the above design, an emergency pressure relief scheme is provided on the water collection tank. When the pressure inside the closed water collection tank rises under special circumstances, the eighth control valve will be opened according to the control value set during commissioning to release flash steam to reduce the internal pressure of the water collection tank, thereby improving the safety of the system during use.

[0028] In this embodiment, a first liquid level sensor 8 is provided in the water collection tank 18, a second liquid level sensor 10 is provided in the first water storage tank 9, and a third liquid level sensor 26 is provided in the second water storage tank 27.

[0029] The first liquid level sensor 8, the second liquid level sensor 10, and the third liquid level sensor 26 described above can detect the condensate level in the water collection tank 18, the first water storage tank 9, and the second water storage tank 27, thereby ensuring the water collection tank 18's water accumulation function and secondary gas-liquid separation function. At the same time, the first and second water storage tanks form a main and backup water storage structure. By detecting the liquid levels of the two water storage tanks based on the liquid level sensors, the system prioritizes using the water storage tank with the lower liquid level for water storage and uses the water storage tank with the higher liquid level for water supply, making the use of this system more flexible.

[0030] Working principle:

[0031] This system uses multiple condensate recovery pipes 1 arranged side-by-side along the conveying direction of the cardboard laminating equipment 29 to centrally collect the condensate generated by steam during the cardboard lamination process. The condensate is then fed into a gas-liquid separator 4 to separate a small amount of steam from the condensate and discharged through a steam jet device 14. The separated condensate is then sent to a water collection tank 18 for temporary storage and secondary gas-liquid separation. After that, the condensate in the water collection tank 18 is pumped into a first water storage tank 9 or a second water storage tank 27 for storage. Finally, the condensate stored in the first water storage tank 9 or the second water storage tank 27 is extracted by a water pump 21, filtered by a filter device 22, and then sent to a steam generator 23 for reuse. This effectively avoids the environmental pollution and water waste caused by condensate in the prior art, while also avoiding the impact on the humidity of the glued cardboard and ensuring the stability of the processing quality.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A paperboard composite condensate recycling system, characterized in that, The system includes multiple condensate recovery pipes (1) arranged side-by-side along the conveying direction of the cardboard laminating equipment (29). The outlets of the multiple condensate recovery pipes (1) are all connected to the inlet of the gas-liquid separator (5) via a water collection pipe (2). The outlet of the gas-liquid separator (5) is connected to the steam injection device (14) via an exhaust pipe (12). The outlet of the gas-liquid separator (5) is connected to the air inlet of the water collection tank (18) via a first water outlet pipe (6). The outlet of the water collection tank (18) is connected to the inlet of the water pump (19). The two outlets of the water pump (19) are respectively connected to the inlets of the first water storage tank (9) and the second water storage tank (27) via a pipe. The water inlets are connected. A first control valve (24) and a second control valve (25) are respectively installed at the inlet of the first water tank (9) and the inlet of the second water tank (27). The outlet of the first water tank (9) is connected to one inlet of the water pump (21) through the second outlet pipe. The inlet of the second water tank (27) is connected to the other inlet of the water pump (21) through the third outlet pipe. The outlet of the water pump (21) is connected to the inlet of the steam generator (23) through the filter device (22). A third control valve (11) is installed on the first outlet pipe (6) and a fourth control valve (20) is installed on the second outlet pipe.

2. The paperboard composite condensate recovery and utilization system according to claim 1, characterized in that, A fifth control valve (3) and a suction pump (4) are also installed on the water collection pipe (2).

3. The paperboard composite condensate recovery and utilization system according to claim 1, characterized in that, A sixth control valve (7) is provided on the first water outlet pipe (6), and a seventh control valve (13) is provided on the exhaust pipe (12).

4. The paperboard composite condensate recovery and utilization system according to claim 1, characterized in that, The outlet of the water collection tank (18) is also connected to the inlet of the steam injection device (14), and an eighth control valve (15) is also provided on the pipe between the outlet of the water collection tank (18) and the inlet of the steam injection device (14).

5. The paperboard composite condensate recovery and utilization system according to claim 4, characterized in that, The air outlet of the water collection tank (18) is also connected to an emergency pressure relief pipe, on which a pressure transmitter (17) and a ninth control valve (16) are installed.

6. The paperboard composite condensate recovery and utilization system according to claim 1, characterized in that, A first liquid level sensor (8) is installed inside the water collection tank (18).

7. The paperboard composite condensate recovery and utilization system according to claim 1, characterized in that, A second liquid level sensor (10) is installed in the first water storage tank (9), and a third liquid level sensor (26) is installed in the second water storage tank (27).

8. The paperboard composite condensate recovery and utilization system according to any one of claims 1-7, characterized in that, The inlet end of the condensate recovery pipe (1) is connected to a water collection hopper (30), the upper end of which is connected to the bottom of the cardboard composite equipment (29).

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