An autoclave waste heat recycling device for autoclaved aerated concrete blocks

Abstract

The utility model provides a kind of autoclaved aerated concrete block autoclave waste heat recycling device, including steam recovery tank, the bottom of steam recovery tank is provided with drain pipe and blow-off pipe, steam recovery tank top is fixed with inlet pipe, steam recovery tank content is provided with rectangular tube, rectangular tube is provided with along the pipeline distribution's shower nozzle, the top of rectangular tube is fixedly connected with transmission pipe.In the utility model, rotatable rectangular tube is arranged in steam recovery tank, then multiple shower nozzles are arranged on rectangular tube, then control mechanism for controlling rectangular tube to swing back and forth is arranged outside the top of steam recovery tank, so that the shower nozzle can uniformly spray certain pressure medicament to the inner wall of steam recovery tank and the outer wall of serpentine pipe, so that scale can be dissolved and washed off, the setting has the advantage that cleaning structure is more thorough, compared with prior art has the advantages of convenient cleaning, cleaning thoroughly.

Description

Technical Field

[0001] This utility model relates to the field of autoclave waste heat recovery technology, specifically a waste heat recovery and utilization device for autoclaves used for autoclaving aerated concrete blocks. Background Technology

[0002] An autoclave, also known as a steam curing autoclave or pressure autoclave, is a large pressure vessel with a wide range of applications. It is widely used for the steam curing of building materials such as aerated concrete blocks, concrete pipe piles, sand-lime bricks, fly ash bricks, microporous calcium silicate boards, new lightweight wall materials, thermal insulation asbestos boards, and high-strength gypsum, where the hydrothermal reaction is completed inside the autoclave.

[0003] After the steam curing process is completed, the waste gas (steam) needs to be discharged. In order to collect the heat energy in the waste gas, waste heat recovery and reuse equipment has been introduced. The purpose is to collect the heat and high-temperature condensate in the waste gas, and then transfer the high-temperature condensate to the boiler through a water pump to realize the secondary use of the condensate. The collected high-temperature steam is usually used to heat cold water using heat exchange components, so that the cold water can be heated and used for domestic or industrial production, thereby realizing the recovery and reuse of heat energy.

[0004] Currently, during the steam curing process of concrete blocks in the autoclave, the concrete blocks contain a large number of impurities (calcium, magnesium, silicon ions, etc.). These impurities will dissolve into the steam. When the steam containing impurities enters the recovery tank, it will condense. During condensation, the impurities will adhere to the inner wall of the recovery tank and the outer wall of the serpentine tube, forming scale. Scale not only affects the heat exchange efficiency of the serpentine tube, but also corrodes the recovery tank. To solve this problem, manual cleaning by scraping and brushing is usually used. This method is not only inefficient and incomplete, but also labor-intensive.

[0005] Therefore, this utility model provides a waste heat recovery and utilization device for autoclaves used for autoclaving aerated concrete blocks. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a waste heat recovery and utilization device for autoclaved aerated concrete blocks, so as to solve the problems mentioned in the background technology. This utility model has the functions of uniform rinsing with medicine and uniform rinsing with clean water, so that the cleaning treatment of the inner wall of the steam recovery tank and the outer wall of the serpentine tube is more comprehensive and clean.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a waste heat recovery and utilization device for autoclaved aerated concrete blocks, comprising a steam recovery tank, a drain pipe and a sewage pipe at the bottom of the steam recovery tank, a steam inlet pipe fixedly installed at the top of the steam recovery tank, a rectangular tube inside the steam recovery tank, nozzles distributed along the pipeline on the rectangular tube, a transmission pipe fixedly connected to the top of the rectangular tube, the transmission pipe penetrating the top wall of the steam recovery tank and rotatably connected to it, a serpentine tube near the inner wall inside the steam recovery tank, both ends of the serpentine tube penetrating the inner wall of the steam recovery tank and extending to the outside, a control mechanism for controlling the back-and-forth rotation of the transmission tube at the top of the steam recovery tank, and a dosing tank and a clean water tank connected to the transmission tube.

[0008] Furthermore, the control mechanism includes a control motor, a reciprocating screw, and an arm. The control motor is fixedly mounted on the top wall outside the steam recovery tank, and its output shaft is fixedly connected to one end of the lead screw on the reciprocating screw. One end of the arm is fixedly connected to the outer wall of the transmission pipe, and a slider is provided on one side of the arm. One side of the slider is rotatably connected to the outer wall of the lead sleeve on the reciprocating screw.

[0009] Furthermore, a positioning shaft is fixedly connected to the outer peripheral wall of the threaded sleeve, and a positioning sleeve sleeved outside the positioning shaft is fixedly connected to one side of the slider. The positioning sleeve and the positioning shaft are rotatably connected.

[0010] Furthermore, both the dosing tank and the clean water tank are connected to a liquid outlet pipe at the bottom. A metering pump and a solenoid valve are connected in series on the liquid outlet pipe. A T-connector is fixedly connected to the top of the transmission pipe. The T-connector is connected to the liquid outlet pipe at the bottom of the dosing tank and the clean water tank respectively through two flexible hoses.

[0011] Furthermore, a controller and an operation panel are fixedly connected to the outer wall of the steam recovery tank, a drain valve is connected in series on the drain pipe, and the controller is electrically connected to the metering pump, the solenoid valve, the drain valve and the operation panel.

[0012] Furthermore, a liquid level sensor and a pressure sensor are fixedly connected to the top of the steam recovery tank, and a temperature sensor is installed on the inner wall of the steam recovery tank.

[0013] Furthermore, a limiting sleeve is fixedly connected to the top of the steam recovery tank. The limiting sleeve is fitted outside the transmission pipe, and a bearing and a sealing sleeve are provided between the two.

[0014] The beneficial effects of this utility model are as follows: In this invention, a rotatable rectangular tube is installed inside the steam recovery tank, and multiple nozzles are installed on the rectangular tube. A control mechanism is then installed on the outside of the top of the steam recovery tank to control the back-and-forth swing of the rectangular tube. This allows the nozzles to evenly spray a certain pressure of agent onto the inner wall of the recovery tank and the outer wall of the serpentine tube, dissolving and rinsing off scale. This design has the advantage of a more thorough cleaning structure and, compared with the prior art, offers the advantages of convenient and thorough cleaning.

[0015] In this invention, by setting up a clean water tank, a chemical dosing tank, a controller, a metering pump, a solenoid valve, and a control panel, the automatic sequential control of chemical dosing and clean water rinsing is facilitated, making the cleaning operation inside the steam recovery tank more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the waste heat recovery and utilization device of the autoclave for autoclaved aerated concrete blocks according to the present invention; Figure 2 for Figure 1 A diagram at the bottom; Figure 3 This is a schematic diagram of the control mechanism of a waste heat recovery and utilization device for autoclaved aerated concrete blocks according to this utility model.

[0017] In the diagram: 1. Steam recovery tank; 11. Drain pipe; 12. Sewage pipe; 13. Limit sleeve; 14. Steam inlet pipe; 2. Rectangular pipe; 3. Nozzle; 4. Transmission pipe; 41. T-joint pipe; 5. Serpentine pipe; 6. Control mechanism; 61. Control motor; 62. Reciprocating screw; 621. Screw; 622. Sleeve; 6221. Positioning shaft; 63. Arm; 631. Slider; 6311. Positioning sleeve; 7. Dosing tank; 8. Clean water tank; 101. Discharge pipe; 102. Metering pump; 103. Solenoid valve; 104. Liquid level sensor; 106. Pressure sensor; 105. Temperature sensor; 107. Controller; 108. Sewage valve; 109. Operation panel; 120. Sealing sleeve. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1 to 3This utility model provides a technical solution: a waste heat recovery and utilization device for autoclaves used for autoclaving of aerated concrete blocks, including a steam recovery tank 1. The bottom of the steam recovery tank 1 is equipped with a drain pipe 11 and a sewage pipe 12. The drain pipe 11 is used to discharge high-temperature condensate. In use, a water pump and a control valve (electromagnetically controlled) are connected in series to the drain pipe 11. The drain pipe 11 is connected to a boiler that supplies steam to the autoclave via a pipeline, for the purpose of recovering and utilizing the high-temperature condensate and reducing the heat required for boiler heating. A steam inlet pipe 14 is fixedly installed at the top of the steam recovery tank 1. A control valve (electromagnetically controlled) is also connected in series to the steam inlet pipe 14. The steam inlet pipe 14 is connected to the waste steam discharge port of the autoclave via a pipeline. Waste steam enters the steam recovery tank 1 through the steam inlet pipe 14, realizing the collection of waste steam. The steam recovery tank 1 is equipped with a serpentine tube 5 near the inner wall. Both ends of the serpentine tube 5 penetrate the inner wall of the steam recovery tank 1 and extend to the outside. One end of the serpentine tube 5 is connected to a cold water source (cold water tank) through a water pump and a control valve (electromagnetic control). The other end of the serpentine tube 5 is connected to a boiler or a hot water storage tank to realize the recovery and utilization of waste steam heat.

[0020] In this technical solution, a rectangular tube 2 is placed inside the steam recovery tank 1. The bottom of the rectangular tube 2 extends into the steam recovery tank 1 near the bottom. Nozzles 3 are arranged along the pipeline on the rectangular tube 2, with nozzles 3 installed both inside and outside the rectangular tube 2. A transmission pipe 4 is fixedly connected to the top of the rectangular tube 2. The transmission pipe 4 penetrates the top wall of the steam recovery tank 1 and the two are rotatably connected. Specifically, a limiting sleeve 13 is fixedly connected to the top of the steam recovery tank 1. The limiting sleeve 13 is fitted outside the transmission pipe 4, and a bearing and a sealing sleeve 120 are provided between the two. The sealing sleeve 120 can prevent leakage. Other sealing structures can also be selected as needed. When the transmission pipe 4 rotates, the nozzles 3 will spray liquid (chemical agent, water) onto the rectangular tube 2 itself, the inner wall (circumferential wall, upper and lower walls) of the steam recovery tank 1, and the outer wall of the serpentine tube 5. When the chemical agent is sprayed, the chemical agent reacts with the scale, the scale softens and is washed off by a flushing liquid under certain pressure.

[0021] The top of the steam recovery tank 1 is equipped with a control mechanism 6 for controlling the back-and-forth rotation of the transmission pipe 4.

[0022] Specifically, the control mechanism 6 includes a control motor 61, a reciprocating screw 62, and an arm 63. The control motor 61 is fixedly mounted on the top wall outside the steam recovery tank 1, and its output shaft is fixedly connected to one end of the lead screw 621 on the reciprocating screw 62. The control motor 61 is a servo motor, which is electrically connected to the controller 107 described below. One end of the arm 63 is fixedly connected to the outer wall of the transmission pipe 4, and a slider 631 is provided on one side of it. One side of the slider 631 is rotatably connected to the outer wall of the sleeve 622 on the reciprocating screw 62. Specifically, a positioning shaft 6221 is fixedly connected to the outer peripheral wall of the sleeve 622, and a positioning sleeve 6311 sleeved outside the positioning shaft 6221 is fixedly connected to one side of the slider 631. The positioning sleeve 6311 and the positioning shaft 6221 are rotatably connected, and a bearing can be installed between the positioning sleeve 6311 and the positioning shaft 6221. When the lead screw 621 rotates, it will use the screw drive force to drive the lead sleeve 622 to reciprocate. Under the sliding compensation and push of the slider 631, the arm 63 swings back and forth, thereby driving the rectangular tube 2 to rotate back and forth through the transmission tube 4. The optimal swing angle for the arm 63 to rotate back and forth is between 150° and 165°.

[0023] It also includes a dosing tank 7 and a clean water tank 8 connected to the transmission pipe 4. The dosing tank 7 and the clean water tank 8 can be fixedly installed on the top wall of the steam recovery tank 1 or installed in other locations. The dosing tank 7 is used to store and quantitatively deliver chemical agents (such as citric acid) at a certain pressure to the transmission pipe 4, and the clean water tank 8 is used to store and quantitatively deliver clean water at a certain pressure to the transmission pipe 4.

[0024] Specifically, both the bottom of the dosing tank 7 and the clean water tank 8 are connected to a liquid outlet pipe 101. A metering pump 102 and a solenoid valve 103 are connected in series on the liquid outlet pipe 101. A three-way pipe 41 is fixedly connected to the top of the transmission pipe 4. The three-way pipe 41 is connected to the liquid outlet pipe 101 at the bottom of the dosing tank 7 and the clean water tank 8 through two flexible hoses respectively. When the metering pump 102 and the solenoid valve 103 are turned on, the liquid in the dosing tank 7 or the clean water tank 8 can be transported into the rectangular pipe 2, and the nozzle 3 will spray a spray with a certain pressure.

[0025] Furthermore, a controller 107 and an operation panel 109 are fixedly connected to the outer wall of the steam recovery tank 1. A drain valve 108 is connected in series on the drain pipe 12. The controller 107 is electrically connected to the metering pump 102, the solenoid valve 103, the drain valve 108, and the operation panel 109. The operator can start the cleaning mode by pressing the buttons on the operation panel 109. The controller 107 adopts a programmable structure and controls the start of the metering pump 102, the solenoid valve 103, and the drain valve 108 through program settings. The controller 107 is also electrically connected to the control valves on the drain pipe 11 and the drain pipe 12, as well as the water pump on the drain pipe 11. In the cleaning mode, the control valves on the drain pipe 11 and the drain pipe 12 are closed, and the water pump on the drain pipe 11 is turned off.

[0026] In this embodiment, a liquid level sensor 104 and a pressure sensor 106 are fixedly connected to the top of the steam recovery tank 1, and a temperature sensor 105 is provided on the inner wall of the steam recovery tank 1 to monitor the pressure, temperature and liquid level inside the steam recovery tank 1. The liquid level sensor 104, pressure sensor 106 and temperature sensor 105 are also electrically connected to the controller 107. The display screen on the operation panel 109 is used to display the temperature, pressure and liquid level inside the steam recovery tank 1.

[0027] In this embodiment, a breathing tube is fixedly connected to the top of the steam recovery tank 1, and a control valve (electromagnetic control) is connected in series on the breathing tube. The control valve is electrically connected to the controller 107. When the cleaning mode is started, the controller 107 controls the control valve on the breathing tube to open, so as to replenish gas into the steam recovery tank 1.

[0028] It should be noted that the inner wall of the serpentine tube 5 is relatively easy to clean. It can be equipped with a separate circulation pipeline, water pump and chemical tank connected to the serpentine tube 5. The scale inside the serpentine tube 5 can be cleaned by circulating flushing. This is existing technology and will not be described in detail in this application.

[0029] Working principle: When periodic maintenance is required, when the pressure data displayed on the control panel 109 is zero and the temperature is close to room temperature, the operator can manually activate the cleaning mode via the buttons on the control panel 109. At this time, the control motor 61 starts, driving the lead screw 621 to rotate, the lead sleeve 622 to move axially back and forth, and the slider 631 is pushed. When the slider 631 moves, it drives the arm 63 to swing back and forth, driving the transmission pipe 4 to rotate back and forth, which in turn drives the rectangular tube 2 to swing back and forth. Then, the controller 107 controls the metering pump 102 and the solenoid valve 103 at the bottom of the dosing tank 7 to open. The agent in the dosing tank 7 is delivered to the rectangular tube 2 at a certain pressure through the transmission pipe 4. At this time, the nozzle 3 sprays water mist at a certain pressure, which will cover the serpentine tube 5. The controller 107 sets the nozzle 3 to periodically rinse the outer wall of the rectangular tube 2 and the inner wall of the steam recovery tank 1, so that the agent and scale can fully react, soften and fall off. After the agent rinsing is completed, the controller 107 controls the metering pump 102 and solenoid valve 103 at the bottom of the dosing tank 7 to close, and then controls the metering pump 102 and solenoid valve 103 at the bottom of the clean water tank 8 to open. At this time, the nozzle 3 will spray water mist of a certain pressure into the steam recovery tank 1. The water mist will wash away the scale residue on the outer wall of the serpentine tube 5 and the rectangular tube 2 and the steam recovery tank 1. The rinsing time is set. During the rinsing process, the controller 107 controls the drain valve 108 to open, and the rinsing waste is discharged through the drain pipe 12. After cleaning is completed, the cleaning mode can be turned off.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waste heat recovery and utilization device for autoclaved aerated concrete block autoclaves, comprising a steam recovery tank (1), wherein a drain pipe (11) and a sewage pipe (12) are provided at the bottom of the steam recovery tank (1), and a steam inlet pipe (14) is fixedly provided at the top of the steam recovery tank (1), characterized in that, The steam recovery tank (1) contains a rectangular tube (2), and nozzles (3) are arranged along the pipeline on the rectangular tube (2). A transmission pipe (4) is fixedly connected to the top of the rectangular tube (2). The transmission pipe (4) is arranged through the top wall of the steam recovery tank (1) and the two are rotatably connected. A serpentine tube (5) is arranged inside the steam recovery tank (1) near the inner wall. Both ends of the serpentine tube (5) are arranged through the inner wall of the steam recovery tank (1) and extend to the outside. A control mechanism (6) for controlling the back-and-forth rotation of the transmission pipe (4) is arranged on the top of the steam recovery tank (1). It also includes a dosing tank (7) and a clean water tank (8) connected to the transmission pipe (4).

2. The waste heat recovery and utilization device for autoclaved aerated concrete block autoclave according to claim 1, characterized in that: The control mechanism (6) includes a control motor (61), a reciprocating screw (62) and an arm (63). The control motor (61) is fixedly installed on the top wall outside the steam recovery tank (1) and its output shaft is fixedly connected to one end of the screw (621) on the reciprocating screw (62). One end of the arm (63) is fixedly connected to the outer wall of the transmission pipe (4) and a slider (631) is provided on one side of it. One side of the slider (631) is rotatably connected to the outer wall of the thread sleeve (622) on the reciprocating screw (62).

3. The waste heat recovery and utilization device for autoclaved aerated concrete block autoclave according to claim 2, characterized in that: The outer peripheral wall of the threaded sleeve (622) is fixedly connected to the positioning shaft (6221), and the side of the slider (631) is fixedly connected to the positioning sleeve (6311) which is sleeved outside the positioning shaft (6221). The positioning sleeve (6311) and the positioning shaft (6221) are rotatably connected.

4. The waste heat recovery and utilization device for autoclaved aerated concrete block autoclave according to claim 1, characterized in that: The bottom of the dosing tank (7) and the clean water tank (8) are both connected to a liquid outlet pipe (101). A metering pump (102) and a solenoid valve (103) are connected in series on the liquid outlet pipe (101). A three-way pipe (41) is fixedly connected to the top of the transmission pipe (4). The three-way pipe (41) is connected to the liquid outlet pipe (101) at the bottom of the dosing tank (7) and the clean water tank (8) through two flexible hoses respectively.

5. The waste heat recovery and utilization device for autoclaved aerated concrete block autoclave according to claim 4, characterized in that: The outer wall of the steam recovery tank (1) is fixedly connected to a controller (107) and an operation panel (109). A drain valve (108) is connected in series on the drain pipe (12). The controller (107) is electrically connected to the metering pump (102), the solenoid valve (103), the drain valve (108), and the operation panel (109).

6. The waste heat recovery and utilization device for autoclaved aerated concrete block autoclave according to claim 1, characterized in that: A liquid level sensor (104) and a pressure sensor (106) are fixedly connected to the top of the steam recovery tank (1), and a temperature sensor (105) is provided on the inner wall of the steam recovery tank (1).

7. The waste heat recovery and utilization device for autoclaved aerated concrete block autoclave according to claim 1, characterized in that: The top of the steam recovery tank (1) is fixedly connected to a limiting sleeve (13), which is sleeved on the outside of the transmission pipe (4) and a bearing and a sealing sleeve (120) are provided between them.

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