A system for energy reuse after use of a pipe pile autoclave

Abstract

This invention relates to an energy recycling system for high-pressure autoclaves used for pipe piles, particularly in the field of pipe pile processing technology. One end of the autoclave receives steam generated by a boiler, while the other end is connected to a curing tank. The curing tank receives excess boiler steam from the top of the autoclave and also receives high-pressure condensate from the autoclave after the reaction, facilitating the curing of the pipe piles within the curing tank. Wastewater from the bottom of the autoclave is discharged into a heat exchange system. This system receives cold soft water from a boiler water tank for heat exchange; the resulting cold soft water becomes hot soft water and is then used in the boiler, increasing the initial temperature of the water inside. The heat exchange system also receives curing water discharged from the curing tank after curing. This curing water and the wastewater discharged from the autoclave exchange heat and then enter a wastewater recycling system for reuse. This system maximizes the utilization of energy from the curing and high-pressure processing of the pipe piles, reducing resource waste and achieving green environmental protection, energy conservation, and emission reduction.

Description

Technical Field

[0001] This invention relates to the field of pipe pile processing technology, and in particular to an energy reuse system for pipe pile autoclaves after use. Background Technology

[0002] Currently, the use of pipe piles is becoming increasingly widespread in building construction. The pipe pile foundations used in my country's construction industry are broadly divided into precast piles and cast-in-place piles. Precast piles are further divided into concrete piles and steel piles. Precast concrete pipe piles are also fundamental components in building engineering, possessing advantages such as high single-pile bearing capacity, fast construction speed, short construction period, and low cost.

[0003] Construction pipe piles often require steam curing at temperatures above 80℃ and high-pressure processing at temperatures above 150℃ and specific pressures. To meet these requirements, manufacturers typically need to configure boilers for saturated steam. Since a large amount of waste is generated during the autoclave processing and steam curing, this waste often contains significant residual heat. If this heat is not effectively utilized, it not only wastes company resources and increases manufacturing costs but also increases the risk of burns and other safety accidents, while simultaneously polluting the environment. To address this problem, this patent proposes an energy reuse system after the use of the pipe pile autoclave. This system maximizes the utilization of energy generated during steam curing and high-pressure processing, reducing resource waste and achieving green environmental protection, energy conservation, and emission reduction. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] In view of the above-mentioned problems in the prior art and to make up for the deficiencies of the prior art, the present invention provides an energy reuse system for a pipe pile high-pressure reactor that can be reasonably manufactured and used.

[0006] (2) Technical solution

[0007] To address the aforementioned technical problems, this invention provides an energy reuse system for a high-pressure autoclave used for pipe piles. One end of the autoclave receives steam generated by boiler heating, and the other end is connected to a steam curing tank. The steam curing tank receives excess boiler steam from the top of the autoclave and also receives high-pressure condensate from the autoclave body after the reaction, facilitating the steam curing of the pipe piles within the steam curing tank. Wastewater from the bottom of the autoclave is discharged into a heat exchange system. This system receives cold soft water from the boiler water tank for heat exchange, transforming the cold soft water into hot soft water, which is then used in the boiler to increase the initial temperature of the water inside the boiler. The heat exchange system also receives steam curing water discharged from the steam curing tank after steam curing. The steam curing water and the wastewater discharged from the autoclave undergo heat exchange and are then recycled in a wastewater reuse system.

[0008] Preferably, the boiler is connected to two or more high-pressure vessels, and there is a time difference in the reaction inside each high-pressure vessel. This facilitates the continuous input of residual steam and high-pressure condensate into the steam curing tank, and the continuous input of wastewater into the heat exchange system. On the one hand, this facilitates the continuous supply of heat from the steam curing tank to the pipe piles for heating and steam curing. On the other hand, it facilitates the maintenance of the heat exchange system at a certain temperature when the boiler water tank enters the heat exchange system, thus achieving the purpose of heat exchange.

[0009] Preferably, a flash tank for vapor-liquid separation is provided on the connecting pipes between the autoclave and the heat exchange system, and between the heat exchange system and the boiler.

[0010] Preferably, the cold soft water from the boiler water tank enters the heat exchange tank of the heat exchange system through a pipeline, and undergoes heat exchange with the wastewater from the autoclave and the steam curing water from the steam curing tank in the heat exchange tank. After entering the flash tank, the water is then used in the boiler. A relay pump is installed on the pipeline connecting the cold soft water.

[0011] Preferably, the wastewater from the autoclave enters a flash tank, and a level monitoring tank is located at the rear end of the flash tank. The level monitoring tank contains a level sensor with three levels. When the level is at the first level, the wastewater flows into the heat exchange tank through the first-level flow pipe. When the level is at the second level, the wastewater flows into the heat exchange tank through both the first-level and second-level flow pipes. When the level is at the third level, the wastewater flows into the heat exchange tank through the first-level, second-level, and third-level flow pipes. The first and second-level flow pipes are equipped with pneumatic drainage pumps and flow switches, and the third pipe is equipped with a relay pump. The level monitoring tank effectively monitors the amount of wastewater flowing into the autoclave from the flash tank, allowing it to flow into the heat exchange tank through different pipes at different flow rates. This prevents the level in the flash tank from becoming too high and ensures timely drainage. Furthermore, to prevent excessive water pressure during use, an external discharge pipe is installed at the front end of the first and second-level flow pipes, effectively controlling the inflow to prevent it from exceeding limits.

[0012] Preferably, the temperature inside the autoclave is set to 150-230℃ and the operating pressure is 10kg, while the temperature in the steam curing tank is set to 80-100℃, which is set to a normal temperature and pressure state. By controlling the ambient temperature and pressure of the autoclave and steam curing tank, it is easier to improve the strength and bending and crack resistance of the pipe pile.

[0013] Preferably, the wastewater reuse system includes a heat exchange circulation pump installed at the rear end of the heat exchange system discharge pipe. The rear end of the heat exchange circulation pump is connected to a mixing tank. The mixing tank also receives purified water from a constant pressure water supply tank. A booster pump is installed on the inlet pipe of the constant pressure water supply tank. A mixing station water supply pump is connected at the rear end of the outlet pipe of the mixing tank. The rear end of the mixing station water supply pump is connected to a return pipe and a mixing station water supply pipe. The return pipe is reconnected to the mixing tank. The mixing station water supply pipe is equipped with a water temperature alarm and at least three outlet pipe branches. Multiple outlet pipe branches are for conveniently opening different valves sequentially when using different flow rates to discharge water from the mixing tank. When the water demand is small, one valve is opened, and water flows out from one outlet pipe branch. When the water demand is large, the second, third, or even more outlet pipe branches are opened according to the opening and closing of the electrically controlled valve to facilitate subsequent processing at the mixing station.

[0014] Preferably, the pipe connecting the heat exchange circulating pump and the mixing tank is equipped with a filter screen, and the large-pore waste residue falls into the fine sand material mixer through the branch pipe, which facilitates the recycling, grinding and mixing of the large-pore waste residue for use.

[0015] Preferably, a direct drainage channel for detection is provided on the pipeline between the heat exchange system and the wastewater reuse system.

[0016] Preferably, electrically controlled valves are installed on the pipes used to connect the autoclave, steam curing tank, heat exchange system, boiler, boiler water tank, and wastewater reuse system, and electrically controlled valves are also installed on the pipes in the heat exchange system and wastewater reuse system.

[0017] (3) Beneficial effects

[0018] This invention provides a direct connection between the autoclave and the steam curing tank, allowing the high-pressure condensate from the autoclave to be discharged into the steam curing tank for steam curing. Simultaneously, excess steam discharged from the boiler into the autoclave can also be discharged into the steam curing tank, thereby controlling the autoclave to perform high-pressure processing on the pipe piles under set temperature and pressure. Wastewater from the bottom of the autoclave is discharged into a heat exchange system for heat exchange, transforming cold soft water into hot soft water, which is then sent to the boiler to increase the initial temperature during boiler processing. This also reduces the heat consumed during boiler heating, thus reducing overall energy use and excess energy emissions, forming a complete and highly efficient circular system.

[0019] This invention provides a way to connect the steam curing water to the heat exchange system, which facilitates the transfer of the residual heat of the steam curing water after steam curing to the heat exchange tank, and works together with the high-temperature wastewater from the autoclave to heat up the cold soft water in the boiler water supply, thereby reducing energy emissions.

[0020] This invention provides a connection method between a heat exchange system and a wastewater reuse system, facilitating the recycling of wastewater after heat exchange, rather than directly discharging it into the environment and causing pollution. The wastewater reuse system reuses waste residue from the wastewater, specifically the residue generated at the bottom of the autoclave and during steam curing. Large particles are screened and fed into a fine sand material mixer for grinding and mixing, while smaller, usable particles are piped into a mixing tank. Externally supplied purified water pressurizes, dilutes, and adjusts the temperature of the residue in the mixing tank, ensuring the liquid temperature is suitable for use in the mixing plant. Furthermore, the mixing tank is connected to a return flow channel and a water supply pipeline to the mixing plant. An electrically controlled valve is adjusted based on the required water volume of the mixing plant, allowing different outflow branches to coordinate and release the desired liquid volume. A return flow channel is also included for convenient control of the liquid volume, effectively regulating the water flow. Attached Figure Description

[0021] Figure 1 This is a structural flow diagram of the energy reuse system of the pipe pile high-pressure reactor of the present invention;

[0022] Figure 2 for Figure 1 Enlarged diagram of the connection relationship;

[0023] Figure 3 This is a schematic diagram showing the connection between the wastewater reuse system of the present invention and other parts;

[0024] Figure 4 This is an enlarged structural diagram of the wastewater reuse system of the present invention.

[0025] Figure label:

[0026] 100-High-pressure autoclave;

[0027] 200-Steam incubator;

[0028] 300-Heat exchange system;

[0029] 400-boiler;

[0030] 500-Boiler Water Pool;

[0031] 600-Wastewater reuse system, 601-Heat exchange circulating pump, 602-Grinding sand material mixer, 603-Mixing water tank, 604-Pressure pump, 605-Mixing station water supply pump, 606-Return flow channel, 607-Water temperature alarm, 608-Mixing station water supply pipeline, 609-Constant pressure water supply tank;

[0032] 10-Flash tank, 11-Level monitoring tank, 12-Pneumatic drain pump, 13-Relay pump, 15-Direct drain channel. Detailed Implementation

[0033] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0034] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] like Figure 1As shown, this invention discloses an energy reuse system for a high-pressure autoclave used for pipe piles. One end of the autoclave 100 receives steam generated by heating from a boiler 400. The internal temperature of the autoclave 100 is set at 150-230℃, and the operating pressure is 10kg. The other end is connected to a steam curing tank 200. The steam curing tank 200 receives excess steam from the boiler 400 at the top of the autoclave 100, and simultaneously receives high-pressure condensate from the autoclave 100 after the reaction, facilitating the steam curing of the pipe piles within the steam curing tank 200. The temperature in the steam curing tank 200 is set at 80-100℃, operating at normal temperature and pressure. Wastewater at the bottom of the autoclave 100, which may contain residual waste from the high-pressure processing of the pipe piles, flows out and is then disposed of... Water is discharged into the heat exchange system 300, which simultaneously receives cold soft water from the boiler water tank 500 for heat exchange. The cold soft water becomes hot soft water after heat exchange and enters the boiler 400 for utilization, increasing the initial temperature of the water inside the boiler. The heat exchange system 300 also receives steam curing water discharged from the steam curing tank 200 after steam curing. The steam curing water and the wastewater discharged from the autoclave are recycled together in the wastewater reuse system 600 after heat exchange. The connecting pipes between the autoclave 100 and the heat exchange system 300, and between the heat exchange system 300 and the boiler 100, are equipped with flash tanks 10 for vapor-liquid separation. The cold soft water from the boiler water tank 500 enters the heat exchange tank of the heat exchange system 300 through the pipes. Wastewater from the autoclave 100 and steam curing water from the steam curing tank 200 undergo heat exchange in the heat exchange tank before entering the flash tank 10 and finally the boiler 400. Cold water is extracted via a relay pump 13 connected to the cold water pipeline. Wastewater from the autoclave 100 also enters the flash tank 10. A level monitoring tank 11 is located at the rear of the flash tank 10 and contains a level sensor. This sensor allows for the accurate determination of wastewater flow into the heat exchange tank. The level sensor has three levels: at the first level (low level), wastewater flows into the heat exchange tank through the first-level flow pipe; at the second level (medium level), wastewater flows through both the first-level and second-level flow pipes. The wastewater flows into the heat exchange tank through the first-level flow pipe, the second-level flow pipe, and the third channel. This prevents the liquid level from becoming too high. The first-level and second-level flow pipes are equipped with pneumatic drainage pumps 12 and flow switches, and the third pipe is equipped with a relay pump 13. In addition, the pipes connecting the autoclave 100, the steam curing tank 200, the heat exchange system 300, the boiler 400, the boiler water tank 500, and the wastewater reuse system 600 are all equipped with electrically controlled valves. The pipes in the heat exchange system 300 and the wastewater reuse system 600 are also equipped with electrically controlled valves to better control the flow of wastewater, steam, and high-pressure condensate.

[0036] See details Figure 2 In another embodiment of the present invention, the boiler 400 is connected to two or more high-pressure vessels 100, and there is a time difference in the reaction inside each high-pressure vessel 100, which facilitates the continuous input of residual steam and high-pressure condensate into the steam curing tank 200, and the continuous input of wastewater into the heat exchange system 300. This can prevent insufficient heat supply during practical use, and allow energy to circulate and flow in an orderly manner throughout the system.

[0037] See details Figure 3 and 4 In another embodiment of the present invention, a wastewater reuse system 600 is described in detail. The wastewater reuse system 600 includes a heat exchange circulation pump 601 located at the rear end of the discharge pipe of a heat exchange system 300. The rear end of the pipe of the heat exchange circulation pump 601 is connected to a mixing tank 603. The top of the mixing tank 603 also receives purified water from a constant pressure water supply tank 609. A booster pump 604 is installed on the inlet pipe of the constant pressure water supply tank 609. The externally input purified water is used to pressurize, dilute, and adjust the temperature of the waste residue in the mixing tank, thereby ensuring that the liquid temperature generated by the mixing tank is directly applicable to the mixing station. The rear end of the outlet pipe of the mixing tank 603 is connected to a mixing station water supply pump 605. The pipeline of the mixing plant water supply pump 605 is connected to a return pipe 606 and a mixing plant water supply pipe 608. The return pipe 606 is reconnected to the mixing water tank 603. The mixing plant water supply pipe 608 is equipped with a water temperature alarm 607 and at least three outflow pipe branches. The multiple outflow pipe branches are for the convenience of opening different valves in sequence when using different flow rates to discharge water from the mixing water tank. When the water demand is small, one valve is opened and water flows out from one outflow pipe branch. When the water demand is large, the second, third, or even more outflow pipe branches are opened according to the opening and closing of the electrically controlled valve, which is convenient for subsequent mixing plant processing. The multiple outflow pipe branches can be adjusted according to the liquid resources required by the downstream mixing plant.

[0038] In response to the issue of large particles in the waste residue discharged from the autoclave 100 during use, another embodiment of the present invention proposes the following improvement: a fine sand material mixer 602 is added to the wastewater reuse system 600. A filter screen is installed in the pipeline connecting the heat exchange circulation pump 601 and the mixing tank 603. Large-diameter waste residue cannot pass through the filter screen, so it falls into the fine sand material mixer 602 through a branch pipeline for grinding and mixing until the particle size is qualified before being reused in the mixing station. In addition, to facilitate the inspection of the heat exchange system, a direct drainage channel 15 for testing is provided on the pipeline between the heat exchange system 300 and the wastewater reuse system 600.

[0039] The above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed. However, the present invention is not limited to these embodiments. It should be noted that for those skilled in the art, any modifications made without departing from the spirit of the present invention fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A pipe pile autoclave post-use energy reutilization system, characterized in that: One end of the autoclave (100) receives steam generated by heating from the boiler (400), and the other end is connected with the steaming pond (200). The steaming pond (200) receives the excess boiler (400) steam on the top of the autoclave (100), and also receives the high-pressure condensed water in the autoclave (100) after reaction, so as to facilitate the pipe pile in the steaming pond (200) to be steamed and cured. The waste water at the bottom of the autoclave (100) is discharged into the heat exchange system (300). The heat exchange system (300) receives the cold soft water from the boiler water pool (500) to exchange heat, and the cold soft water after heat exchange becomes hot soft water and enters the boiler (400) for use, so as to improve the initial temperature of the water in the boiler. The heat exchange system (300) also receives the steaming water discharged after steaming in the steaming pond (200). After heat exchange, the steaming water and the waste water discharged from the autoclave enter the waste water recycling system (600) for recycling; The boiler (400) is connected with two or more autoclaves (100). The reaction time in each autoclave (100) is different, so that the excess steam and high-pressure condensed water can be continuously input into the steaming pond (200), and the waste water can be continuously input into the heat exchange system (300); The cold soft water in the boiler water pool (500) enters the heat exchange tank of the heat exchange system (300) through a pipeline, is heat exchanged by the waste water of the autoclave (100) and the steaming water of the steaming pond (200) in the heat exchange tank, enters the flash tank (10), and then enters the boiler (400) for use. A relay pump (13) is arranged on the pipeline connected with the cold soft water; The waste water of the autoclave (100) enters the flash tank (10), and the rear end of the flash tank (10) is provided with a liquid level monitoring tank (11). A liquid level sensor is arranged in the liquid level monitoring tank (11). The liquid level sensor has three liquid level sensing grades. When the liquid level is in the first grade, the waste water flows into the heat exchange tank through a first grade flow pipeline. When the liquid level is in the second grade, the waste water flows into the heat exchange tank through the first grade flow pipeline and a second grade flow pipeline. When the liquid level is in the third grade, the waste water flows into the heat exchange tank through the first grade flow pipeline, the second grade flow pipeline and a third channel. A pneumatic drainage pump (12) and a flow switch are arranged on the first grade flow pipeline and the second grade flow pipeline. A relay pump (13) is arranged on the third channel. The temperature inside the autoclave (100) is set to 150-230℃, and the use pressure is 10kg. The temperature in the steaming pond (200) is set to 80-100℃, and is set to normal temperature and pressure. The wastewater recycling system (600) comprises a heat exchange circulating pump (601) arranged at the rear end of the discharge pipe of the heat exchange system (300), the rear end of the pipe of the heat exchange circulating pump (601) is connected to a stirring water tank (603), the stirring water tank (603) also receives purified water provided from a constant pressure water supply tank (609), a pressurizing pump (604) is arranged on the inlet pipe of the constant pressure water supply tank (609), the outlet pipe of the stirring water tank (603) is connected to a stirring station water supply pump (605), the rear end of the pipe of the stirring station water supply pump (605) is connected to a pipe including a backflow pipe (606) and a stirring station water supply pipe (608), the backflow pipe (606) is reconnected to the stirring water tank (603), the stirring station water supply pipe (608) is provided with a water temperature alarm (607) and at least three outlet pipe branches; Electric control valves are arranged on the pipes for connecting the autoclave (100), the steam curing tank (200), the heat exchange system (300), the boiler (400), the boiler water tank (500) and the wastewater recycling system (600), and electric control valves are also arranged on the pipes in the heat exchange system (300) and the wastewater recycling system (600).

2. The system of claim 1, wherein: A flash tank (10) for vapor-liquid separation is arranged on the connecting pipes of the autoclave (100) and the heat exchange system (300) and the heat exchange system (300) and the boiler (400).

3. The system of claim 1, wherein: A filter screen is arranged in the pipe connecting the heat exchange circulating pump (601) and the stirring water tank (603), and waste residues with large pore diameters fall into a fine sand material mixing machine (602) through a branch pipe.

4. The system of claim 3, wherein: A direct drainage pipe (15) for detection is arranged on the pipe between the heat exchange system (300) and the wastewater recycling system (600).

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