Device and method for continuous drainage, fixed drainage and heat recovery of boiler

Abstract

The invention relates to the field of boiler continuous drainage, regular drainage and heat recovery, and discloses a boiler continuous drainage, regular drainage and heat recovery device and method.The boiler continuous drainage, regular drainage and heat recovery device comprises a regular drainage flash tank, and the bottom of the regular drainage flash tank is fixedly connected with a drainage pipe; a recycling water pump is installed on one side of the recycling water tank, the output end of the recycling water pump is fixedly connected with a middle hot water tank, the output end of the hot water pump is fixedly connected with a high-temperature mixed bed, one side of the high-temperature mixed bed is fixedly connected with a high-temperature desalting water tank, and a high-temperature desalting water pump is installed on one side of the high-temperature desalting water tank. The output end of the high-temperature desalting water pump is fixedly connected with a first deaerator. Mixed waste water enters the recovery water tank through the drainage pipe, is merged, is pumped into the intermediate hot water tank through the recovery water, is purified by the high-temperature mixed bed, is buffered by the high-temperature desalting water tank, and is conveyed to the deaerator I through the high-temperature desalting water pump, so that nearly 100% recovery of water heat is realized.

Description

Technical Field

[0001] This invention relates to the field of boiler continuous drainage, constant drainage and heat recovery technology, specifically to a device and method for boiler continuous drainage, constant drainage and heat recovery. Background Technology

[0002] Boilers are the core energy supply equipment in thermal power plants. During their operation, they need to maintain the stability of the water quality inside the boiler through periodic drainage and continuous drainage. Periodic drainage is the wastewater discharged from the bottom of the boiler at regular intervals. It contains a lot of scale and impurities and is accompanied by a certain amount of high-temperature steam when discharged. Continuous drainage is the concentrated water in the upper part of the boiler that is discharged continuously. It has a lower concentration of impurities, but the water temperature is high, it contains a lot of waste heat, and it is easy to carry a small amount of steam.

[0003] Traditional fixed-discharge and continuous-discharge systems use direct external discharge, which cannot fully recover the water and heat from both fixed-discharge and continuous-discharge systems. This results in the waste heat from fixed-discharge and continuous-discharge systems not being used properly, leading to a waste of some water resources and heat. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device and method for boiler continuous drainage, constant drainage, and heat recovery. This solves the problem that traditional constant and continuous drainage systems use direct discharge, which cannot fully recover the water and heat from both constant and continuous drainage, resulting in the waste of some water and heat resources due to the unreasonable utilization of waste heat from constant and continuous drainage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for continuous drainage, constant drainage, and heat recovery of a boiler, comprising a constant drainage expansion vessel, a continuous drainage expansion vessel, and a recovery water tank. A drain pipe is fixedly connected to the bottom of the constant drainage expansion vessel, one end of which is installed inside the recovery water tank. A recovery water pump is installed on one side of the recovery water tank, and the output end of the recovery water pump is fixedly connected to an intermediate hot water tank. A hot water pump is installed on one side of the intermediate hot water tank, and the input end of the hot water pump is fixedly connected to one side of the intermediate hot water tank. A high-temperature mixed bed is fixedly connected to the output end of the hot water pump. A high-temperature demineralized water tank is fixedly connected to one side of the high-temperature mixed bed, and a high-temperature demineralized water pump is installed on one side of the high-temperature demineralized water tank. The input end of the high-temperature demineralized water pump is fixedly connected to one side of the high-temperature demineralized water tank, and a deaerator is fixedly connected to the output end of the high-temperature demineralized water pump. A demineralized water spray assembly is installed on the top of the constant drainage expansion vessel.

[0006] By adopting the above technical solution, through the spraying operation of the demineralized water spraying component, the demineralized water comes into direct contact with the high-temperature steam discharged from the fixed outlet. The steam cools down and quickly condenses into liquid water. The heat carried by the steam is simultaneously transferred to the sprayed demineralized water, which raises the temperature of the demineralized water and prevents the heat from being discharged with the steam, thus realizing the recovery of steam heat to spray water heat.

[0007] The mixed wastewater formed in the fixed-discharge expansion tank includes the original fixed-discharge wastewater, sprayed demineralized water after heat absorption, condensed steam water, wastewater from the continuous discharge treatment, and boiler emergency discharge water. It is discharged into the underground recovery water tank through the drain pipe at the bottom of the fixed-discharge expansion tank for temporary storage to balance the water volume fluctuations in the subsequent treatment process. After being pressurized by the recovery water pump, the mixed wastewater in the recovery water tank first enters the intermediate hot water tank for temporary storage. After the water flow is stabilized, it is sequentially introduced into the high-temperature mixed bed and the high-temperature demineralized water tank. The high-temperature mixed bed removes impurities such as calcium, magnesium, and chloride ions from the wastewater to prevent impurities from entering the boiler and causing scaling and corrosion, so that the water quality meets the boiler supply water standards. The purified qualified water is buffered and stabilized by the high-temperature demineralized water tank and then pressurized by the high-temperature demineralized water pump and sent to the deaerator. After being mixed with other qualified water sources, it is returned to the boiler, ensuring the quality of boiler water and ensuring the safe and stable operation of the boiler. The steam, water, and heat of the boiler's fixed-discharge and continuous discharge systems are recovered and reused by nearly 100%, saving production costs and achieving the goal of energy conservation and consumption reduction.

[0008] Preferably, a wastewater pipe is fixedly connected to the middle of the fixed discharge expansion container, and a branch pipe for incoming water is uniformly fixedly connected to the outer wall of the wastewater pipe.

[0009] Preferably, a continuous drainage branch pipe is fixedly connected to the middle of the continuous drainage expansion container, an exhaust pipe is fixedly connected to the top of the continuous drainage expansion container, a deaerator vapor balance pipe is fixedly connected to the top of the exhaust pipe, a conveying pipe is fixedly connected to the bottom of the continuous drainage expansion container, and a gas-liquid two-phase valve is installed on the outer wall of the conveying pipe.

[0010] Preferably, a continuous drain and demineralized water heat exchanger is installed at one end of the conveying pipe, a demineralized water pump is installed on the outer wall of the continuous drain and demineralized water heat exchanger, the output end of the demineralized water pump is fixedly connected inside the continuous drain and demineralized water heat exchanger, an output pipe is installed on the outer wall of the continuous drain and demineralized water heat exchanger, and one end of the output pipe is fixedly connected to the inlet end of the deaerator.

[0011] Preferably, a wastewater discharge pipe is fixedly connected to one side of the continuous drainage and demineralized water heat exchanger, one end of the wastewater discharge pipe is fixedly connected to the middle of the fixed discharge expansion container, and a boiler emergency water pipe is fixedly connected to the outer wall of the wastewater discharge pipe.

[0012] Preferably, the demineralized water spray assembly includes an exhaust pipe II, the bottom of which is fixedly connected to the top of the fixed discharge expansion container. A support frame is symmetrically fixedly connected to the inner wall of the fixed discharge expansion container. A connecting pipe is fixedly connected to the inner wall of the support frame. An annular pipe is rotatably connected to the bottom of the connecting pipe. Spray nozzles are uniformly fixedly connected to the bottom of the annular pipe.

[0013] Preferably, springs are uniformly fixedly connected to the top of the annular tube, and crosses are fixedly connected to the top of the springs. The inner wall of the crosses is fixedly connected to the outer wall of the connecting tube.

[0014] Preferably, an installation frame is installed on the outer wall of the fixed-displacement expansion container, a drive motor is installed on the top of the installation frame, a rotating shaft is fixedly connected to the output end of the drive motor, a circular gear is fixedly connected to the outer wall of the rotating shaft, a gear ring is meshed with the tooth end of the circular gear, the bottom of the gear ring is rotatably connected inside the fixed-displacement expansion container, a connecting rod is fixedly connected to the bottom of the gear ring, a mounting base is fixedly connected to the bottom of the connecting rod, a roller is rotatably connected inside the mounting base, and the outer wall of the roller is set on the top of the annular tube.

[0015] Preferably, a driving bevel gear is fixedly connected to the bottom of the rotating shaft, a driven bevel gear is meshed with the tooth end of the driving bevel gear, a connecting shaft is fixedly connected to the inner wall of the driven bevel gear, one end of the connecting shaft is rotatably connected to the fixed-row expansion container, and stirring blades are uniformly fixedly connected to the outer wall of the connecting shaft.

[0016] A method for boiler continuous drainage, constant drainage, and heat recovery includes the following steps:

[0017] During use, the boiler's fixed drains enter the fixed drain expansion tank through the fixed drain inlet branch pipe, and the continuous drains enter the continuous drain expansion tank through the continuous drain inlet branch pipe.

[0018] High-temperature steam enters the deaerator steam balance pipe through exhaust pipe 1 to heat deaerator 1. Liquid wastewater enters the continuous drainage and demineralized water heat exchanger through gas-liquid two-phase valve. Demineralized water pump 1 delivers room temperature demineralized water into the tube heat exchanger. The preheated demineralized water enters deaerator 1 through the output pipe.

[0019] External demineralized water enters the annular pipe through the connecting pipe and is sprayed out by the nozzle. At the same time, the drive motor is started, which causes the rotating shaft to drive the circular gear to rotate, which in turn causes the gear ring and connecting rod to make circular motion, causing the roller to press the annular pipe. With the cooperation of the spring, the spray direction of the annular pipe changes.

[0020] The rotating shaft synchronously drives the active bevel gear to rotate, which in turn drives the driven bevel gear and the connecting shaft to rotate, so that the rotation of the stirring blades prolongs the residence time of steam in the constant discharge expansion vessel, and the steam condenses and transfers heat.

[0021] The fixed discharge mixed wastewater enters the recovery water tank through the drain pipe, and the continuous discharge cooling wastewater enters the fixed discharge expansion tank through the continuous discharge wastewater pipe. After merging, it enters the intermediate hot water tank through the recovery water pump, and then passes through the high temperature mixed bed purification and the high temperature demineralized water tank buffer. Finally, it is pumped to the deaerator by the high temperature demineralized water pump.

[0022] This invention provides a device and method for continuous boiler drainage, constant boiler drainage, and heat recovery. It has the following beneficial effects:

[0023] 1. In this invention, the fixed discharge mixed wastewater enters the recovery water tank through the drain pipe, and the continuous discharge cooling wastewater enters the fixed discharge expansion tank through the continuous discharge wastewater pipe. After merging, it enters the intermediate hot water tank through the recovery water pump, and then passes through the high temperature mixed bed purification and the high temperature demineralized water tank buffer. Finally, it is pumped to the deaerator one by the high temperature demineralized water pump and fed back to the boiler, achieving nearly 100% water and heat recovery.

[0024] 2. This invention drives a rotating shaft and a circular gear to rotate via a drive motor, causing the gear ring to rotate within a fixed-row expansion container. This, in turn, drives the connecting rod, mounting base, and roller to perform circumferential motion. The roller moves along the top of the annular tube, compressing or stretching the spring. With the cooperation of the spring, the spray direction of the annular tube changes. When the roller passes one end of the annular tube, that end is lower, and the relatively distant end is higher, achieving spraying without dead angles, increasing the contact area between the spray liquid and steam, and enhancing the heat recovery effect.

[0025] 3. In this invention, the rotating shaft drives the active bevel gear to rotate, which in turn drives the driven bevel gear and the connecting shaft to rotate. The stirring blades on the outer wall of the connecting shaft rotate, disrupting the steam flow direction and prolonging the time the steam spends inside the constant discharge expansion container, thereby further improving the steam-to-water conversion effect and thus improving the heat recovery efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the heat recovery device of the present invention;

[0027] Figure 2 This is a partial structural diagram of the fixed-displacement expansion container of the present invention;

[0028] Figure 3 This is a partial structural diagram of the exhaust pipe of the present invention;

[0029] Figure 4 This is a schematic diagram of a partial structure of the annular tube of the present invention;

[0030] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle;

[0031] Figure 6 This is a schematic diagram of the internal structure of the fixed-displacement expansion container of the present invention;

[0032] Figure 7 This is a partial structural diagram of the rotating shaft of the present invention.

[0033] The components include: 1. Fixed discharge expansion tank; 101. Continuous discharge expansion tank; 2. Recovered water tank; 201. Drainage pipe; 202. Recovered water pump; 203. Intermediate hot water tank; 204. Hot water pump; 205. High-temperature mixed bed; 206. High-temperature demineralized water tank; 207. High-temperature demineralized water pump; 208. Deaerator I; 3. Fixed discharge inlet branch pipe; 301. Fixed discharge wastewater pipe; 4. Continuous discharge inlet branch pipe; 401. Exhaust pipe I; 402. Deaerator vapor balance pipe; 403. Gas-liquid two-phase valve; 404. Conveying pipe; 405. Continuous drainage and demineralized water heat exchanger; 406. Desalination... 1. Water pump; 407. Output pipe; 5. Wastewater discharge pipe; 501. Boiler emergency water pipe; 6. Demineralized water spray assembly; 601. Exhaust pipe II; 602. Support frame; 603. Connecting pipe; 604. Annular pipe; 605. Spray head; 7. Spring; 701. Cross; 8. Mounting frame; 801. Drive motor; 802. Rotating shaft; 803. Circular gear; 804. Gear ring; 805. Connecting rod; 806. Mounting base; 807. Roller; 9. Driving bevel gear; 901. Driven bevel gear; 902. Connecting shaft; 903. Agitator blade. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see the appendix Figure 1 -Appendix Figure 7 This invention provides a device for continuous drainage, constant drainage, and heat recovery of a boiler, including a constant drainage expansion container 1, a continuous drainage expansion container 101, and a recovery water tank 2. A drain pipe 201 is fixedly connected to the bottom of the constant drainage expansion container 1, and one end of the drain pipe 201 is installed inside the recovery water tank 2. A recovery water pump 202 is installed on one side of the recovery water tank 2, and an intermediate hot water tank 203 is fixedly connected to the output end of the recovery water pump 202. A hot water pump 204 is installed on one side of the intermediate hot water tank 203, and the input end of the hot water pump 204... A high-temperature mixed bed 205 is fixedly connected to one side of the intermediate hot water tank 203. A high-temperature demineralized water tank 206 is fixedly connected to one side of the high-temperature mixed bed 205. A high-temperature demineralized water pump 207 is installed on one side of the high-temperature demineralized water tank 206. The input end of the high-temperature demineralized water pump 207 is fixedly connected to one side of the high-temperature demineralized water tank 206. A deaerator 208 is fixedly connected to the output end of the high-temperature demineralized water pump 207. A demineralized water spray assembly 6 is installed on the top of the fixed discharge expansion container 1.

[0036] Specifically, the mixed wastewater formed in the fixed discharge expansion tank 1 includes the original fixed discharge wastewater, spray demineralized water after heat absorption, condensed steam water, wastewater from the continuous discharge treatment, and boiler emergency discharge water. This wastewater is discharged through the drain pipe 201 at the bottom of the fixed discharge expansion tank 1 into the underground recovery water tank 2 for temporary storage to balance water volume fluctuations in subsequent treatment processes. After being pressurized by the recovery water pump 202, the mixed wastewater in the recovery water tank 2 first enters the intermediate hot water tank 203 for temporary storage. After stabilizing the water flow, it is sequentially introduced into the high-temperature mixed bed 205 and the high-temperature... The demineralized water tank 206 and the high-temperature mixed bed 205 remove impurities such as calcium, magnesium, and chloride ions from the wastewater, preventing impurities from entering the boiler and causing scaling and corrosion. This ensures that the water quality meets the boiler supply standards. The purified and qualified water is buffered and stabilized by the high-temperature demineralized water tank 206 and then pressurized by the high-temperature demineralized water pump 207 and transported to the deaerator 208. After being mixed with other qualified water sources, it is returned to the boiler, ensuring the quality of the boiler water and guaranteeing the safe and stable operation of the boiler. This achieves nearly 100% recovery and utilization of steam, water, and heat from the boiler's fixed-flow system.

[0037] The high-temperature demineralized water tank 206 is connected to the high-temperature mixed bed 205. Each branch pipe 3 of the fixed discharge water supply is equipped with a manual branch valve 1, a manual branch valve 2, and an electric branch valve. The manual branch valve 1 and branch valve 2 are used as emergency shut-off valves for graded shut-off. The electric branch valve precisely controls the start and stop of the single fixed discharge water supply. The fixed discharge wastewater pipe 301 is equipped with a fixed discharge main pipe manual valve and a fixed discharge main pipe electric valve to control the total water inflow of the entire fixed discharge system. When repairing the fixed discharge expansion tank 1 or downstream pipes, the water source can be completely cut off through the manual main valve. The electric main valve, in conjunction with the central control system, realizes automatic adjustment of the total flow.

[0038] The demineralized water spraying unit 6 performs spraying operations to achieve preliminary heat recovery.

[0039] Please see the appendix Figure 1 A fixed wastewater pipe 301 is fixedly connected to the middle of the fixed discharge expansion container 1, and fixed water inlet branch pipes 3 are uniformly fixedly connected to the outer wall of the fixed wastewater pipe 301.

[0040] A continuous drainage expansion tank 101 is fixedly connected to a continuous drainage water branch pipe 4 in the middle. An exhaust pipe 401 is fixedly connected to the top of the continuous drainage expansion tank 101. A deaerator steam balance pipe 402 is fixedly connected to the top of the exhaust pipe 401. A conveying pipe 404 is fixedly connected to the bottom of the continuous drainage expansion tank 101. A gas-liquid two-phase valve 403 is installed on the outer wall of the conveying pipe 404. A continuous drainage and demineralized water heat exchanger 405 is installed at one end of the conveying pipe 404. A demineralization device is installed on the outer wall of the continuous drainage and demineralized water heat exchanger 405. The output end of water pump 406 and demineralized water pump 406 is fixedly connected inside the drain and demineralized water heat exchanger 405. An output pipe 407 is installed on the outer wall of the drain and demineralized water heat exchanger 405. One end of the output pipe 407 is fixedly connected to the inlet end of deaerator 208. A wastewater discharge pipe 5 is fixedly connected to one side of the drain and demineralized water heat exchanger 405. One end of the wastewater discharge pipe 5 is fixedly connected to the middle of the fixed discharge expansion tank 1. A boiler emergency water pipe 501 is fixedly connected to the outer wall of the wastewater discharge pipe 5.

[0041] Specifically, the boiler's various scheduled water discharges enter the scheduled water discharge expansion tank 1 through the scheduled water discharge branch pipe 3;

[0042] The various drains from the boiler enter the continuous drain expansion tank 101 through the continuous drain branch pipe 4. Gas-liquid separation is achieved by utilizing the pressure difference. The high-temperature steam in the drains directly enters the deaerator steam balance pipe 402 from the exhaust pipe 401 at the top of the continuous drain expansion tank 101, providing a heat source for the deaerator 208. This replaces external steam or fuel heating, achieving direct recovery of steam heat without the need for additional heat exchange links, thus improving heat recovery efficiency and reducing energy consumption.

[0043] The liquid wastewater separated from the continuous discharge expansion tank 101, after having its flow rate stabilized by the gas-liquid two-phase valve 403, enters the continuous discharge and demineralized water heat exchanger 405. The demineralized water pump 406 delivers ambient temperature demineralized water to the tube side of the heat exchanger 405. The wastewater is in the shell side, and through heat conduction from the tube walls, the residual heat of the wastewater is transferred to the demineralized water in the tube side. The preheated demineralized water is then directly delivered to the inlet of the deaerator 208 through the outlet pipe 407. Simultaneously, the wastewater itself cools down, facilitating subsequent cooling. Continuous water treatment avoids high temperature damage to equipment, realizes the recovery of waste heat from continuous wastewater discharge, reduces the energy consumption of deaerator-208 heating demineralized water, and the cooled continuous wastewater discharge enters the fixed discharge expansion tank 1 through continuous wastewater discharge pipe 5, and merges with the mixed wastewater of the fixed discharge system. The subsequent process is completely consistent with the fixed discharge system, realizing the shared subsequent treatment system for continuous discharge and fixed discharge, simplifying the treatment process, improving resource utilization efficiency, and the output pipe 407 is connected to the tube outlet of continuous discharge and demineralized water heat exchanger 405.

[0044] The continuous drainage branch pipe 4 is equipped with a manual branch valve 1, a manual branch valve 2, and an electric regulating valve. The manual branch valve 1 and branch valve 2 are used for maintenance isolation and emergency shutdown. The core function of the electric regulating valve is precise flow control. The inlet pipe of the continuous drainage expansion container 101 is equipped with the main inlet valve of the continuous drainage expansion container 101.

[0045] Please see the appendix Figure 2 -Appendix Figure 4 The demineralized water spray assembly 6 includes an exhaust pipe 2 601, the bottom of which is fixedly connected to the top of the fixed discharge expansion container 1. A support frame 602 is symmetrically fixedly connected to the inner wall of the fixed discharge expansion container 1. A connecting pipe 603 is fixedly connected to the inner wall of the support frame 602. An annular pipe 604 is rotatably connected to the bottom of the connecting pipe 603. Spray nozzles 605 are uniformly fixedly connected to the bottom of the annular pipe 604.

[0046] Specifically, the external demineralized water spray liquid enters the interior of the connecting pipe 603, which then transports the spray liquid to the annular pipe 604. Finally, it is sprayed out through the nozzle 605. The demineralized water comes into direct contact with the high-temperature steam discharged from the stationary outlet. The steam cools down and quickly condenses into liquid water. At the same time, the heat carried by the steam is transferred to the sprayed demineralized water, raising its temperature and preventing heat from being released into the air with the steam, thus achieving preliminary recovery of steam heat.

[0047] Please see the appendix Figure 2 -Appendix Figure 5 Appendix Figure 7 Springs 7 are evenly fixedly connected to the top of the annular tube 604, and crosses 701 are fixedly connected to the top of the springs 7. The inner wall of the crosses 701 is fixedly connected to the outer wall of the connecting tube 603.

[0048] An installation frame 8 is installed on the outer wall of the fixed-discharge expansion container 1. A drive motor 801 is installed on the top of the installation frame 8. A rotating shaft 802 is fixedly connected to the output end of the drive motor 801. A circular gear 803 is fixedly connected to the outer wall of the rotating shaft 802. A gear ring 804 is meshed with the tooth end of the circular gear 803. The bottom of the gear ring 804 is rotatably connected inside the fixed-discharge expansion container 1. A connecting rod 805 is fixedly connected to the bottom of the gear ring 804. A mounting base 806 is fixedly connected to the bottom of the connecting rod 805. A roller 807 is rotatably connected inside the mounting base 806. The outer wall of the roller 807 is set on the top of the annular tube 604.

[0049] Specifically, during the spraying operation, the drive motor 801 is started, and its output end drives the rotating shaft 802 and the circular gear 803 to rotate, causing the gear ring 804 to rotate within the fixed-displacement expansion container 1. This, in turn, drives the connecting rod 805, the mounting base 806, and the roller 807 to perform circumferential motion. The roller 807 moves along the top of the annular tube 604, causing the spring 7 to be compressed or stretched. With the cooperation of the spring 7, the spraying direction of the annular tube 604 changes. When the roller 807 passes one end of the annular tube 604, that end is lower, and the relatively distant end is higher, achieving spraying without dead angles, increasing the contact area between the spray liquid and the steam, and enhancing the heat recovery effect.

[0050] Please see the appendix Figure 3 Appendix Figure 6 A driving bevel gear 9 is fixedly connected to the bottom of the rotating shaft 802. The tooth end of the driving bevel gear 9 is meshed with a driven bevel gear 901. A connecting shaft 902 is fixedly connected to the inner wall of the driven bevel gear 901. One end of the connecting shaft 902 is rotatably connected to the fixed-displacement expansion container 1. Stirring blades 903 are uniformly fixedly connected to the outer wall of the connecting shaft 902.

[0051] Specifically, the rotation of the rotating shaft 802 will drive the active bevel gear 9 to rotate, which in turn will drive the driven bevel gear 901 and the connecting shaft 902 to rotate. The stirring blades 903 on the outer wall of the connecting shaft 902 will rotate, disrupting the steam flow direction and prolonging the time the steam spends inside the constant discharge expansion vessel 1, thereby further improving the steam-to-water conversion effect and thus improving the heat recovery efficiency.

[0052] A method for boiler continuous drainage, constant drainage, and heat recovery includes the following steps:

[0053] During use, the boiler's fixed drainage lines enter the fixed drainage expansion container 1 through the fixed drainage inlet branch pipe 3, and the boiler's continuous drainage lines enter the continuous drainage expansion container 101 through the continuous drainage inlet branch pipe 4.

[0054] High-temperature steam enters the deaerator steam balance pipe 402 through exhaust pipe 401 to heat deaerator 208. Liquid wastewater enters the continuous drainage and demineralized water heat exchanger 405 through gas-liquid two-phase valve 403. Demineralized water pump 406 delivers room temperature demineralized water into the tube heat exchanger. The preheated demineralized water enters deaerator 208 through output pipe 407.

[0055] External demineralized water enters the annular pipe 604 through the connecting pipe 603 and is sprayed out by the nozzle 605. At the same time, the drive motor 801 is started, which causes the rotating shaft 802 to drive the circular gear 803 to rotate, thereby causing the gear ring 804 and the connecting rod 805 to make circular motion, causing the roller 807 to press the annular pipe 604. With the cooperation of the spring 7, the spray direction of the annular pipe 604 changes.

[0056] The rotating shaft 802 synchronously drives the active bevel gear 9 to rotate, which in turn drives the driven bevel gear 901 and the connecting shaft 902 to rotate, so that the stirring blades 903 rotate to prolong the residence time of steam in the constant discharge expansion vessel 1, and the steam condenses and transfers heat.

[0057] The fixed discharge mixed wastewater enters the recovery water tank 2 through the drain pipe 201, and the continuous discharge cooling wastewater enters the fixed discharge expansion container 1 through the continuous discharge wastewater pipe 5. After merging, it enters the intermediate hot water tank 203 through the recovery water pump 202, and then is purified by the high temperature mixed bed 205 and buffered by the high temperature demineralized water tank 206. Finally, it is transported to the deaerator 208 by the high temperature demineralized water pump 207.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for continuous drainage, constant drainage, and heat recovery of a boiler, comprising a constant drainage expansion vessel (1), a continuous drainage expansion vessel (101), and a recovery water tank (2), characterized in that: A drain pipe (201) is fixedly connected to the bottom of the fixed-discharge expansion container (1). One end of the drain pipe (201) is installed inside the recovery water tank (2). A recovery water pump (202) is installed on one side of the recovery water tank (2). The output end of the recovery water pump (202) is fixedly connected to an intermediate hot water tank (203). A hot water pump (204) is installed on one side of the intermediate hot water tank (203). The input end of the hot water pump (204) is fixedly connected to one side of the intermediate hot water tank (203). The output end of the container (1) is fixedly connected to a high-temperature mixed bed (205), and a high-temperature demineralized water tank (206) is fixedly connected to one side of the high-temperature mixed bed (205). A high-temperature demineralized water pump (207) is installed on one side of the high-temperature demineralized water tank (206). The input end of the high-temperature demineralized water pump (207) is fixedly connected to one side of the high-temperature demineralized water tank (206). A deaerator (208) is fixedly connected to the output end of the high-temperature demineralized water pump (207). A demineralized water spray assembly (6) is installed on the top of the container (1).

2. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 1, characterized in that: The central part of the fixed discharge expansion container (1) is fixedly connected to a fixed discharge wastewater pipe (301), and the outer wall of the fixed discharge wastewater pipe (301) is uniformly fixedly connected to a fixed discharge water inlet branch pipe (3).

3. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 1, characterized in that: The continuous discharge expansion container (101) is fixedly connected to a continuous discharge water branch pipe (4) in the middle, the continuous discharge expansion container (101) is fixedly connected to an exhaust pipe (401) at the top, the exhaust pipe (401) is fixedly connected to a deaerator vapor balance pipe (402) at the top, the continuous discharge expansion container (101) is fixedly connected to a conveying pipe (404) at the bottom, and a gas-liquid two-phase valve (403) is installed on the outer wall of the conveying pipe (404).

4. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 3, characterized in that: One end of the conveying pipe (404) is equipped with a continuous drainage and demineralized water heat exchanger (405). A demineralized water pump (406) is installed on the outer wall of the continuous drainage and demineralized water heat exchanger (405). The output end of the demineralized water pump (406) is fixedly connected inside the continuous drainage and demineralized water heat exchanger (405). An output pipe (407) is installed on the outer wall of the continuous drainage and demineralized water heat exchanger (405). One end of the output pipe (407) is fixedly connected to the inlet end of the deaerator (208).

5. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 4, characterized in that: A wastewater pipe (5) is fixedly connected to one side of the continuous drainage and demineralized water heat exchanger (405). One end of the wastewater pipe (5) is fixedly connected to the middle of the fixed drainage expansion container (1). A boiler emergency water pipe (501) is fixedly connected to the outer wall of the wastewater pipe (5).

6. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 1, characterized in that: The demineralized water spray assembly (6) includes an exhaust pipe II (601), the bottom of which is fixedly connected to the top of the fixed discharge expansion container (1). The inner wall of the fixed discharge expansion container (1) is symmetrically fixedly connected to a support frame (602), the inner wall of which is fixedly connected to a connecting pipe (603), the bottom of which is rotatably connected to an annular pipe (604), and the bottom of which is uniformly fixedly connected to a spray nozzle (605).

7. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 6, characterized in that: A spring (7) is uniformly fixedly connected to the top of the annular tube (604), and a cross (701) is fixedly connected to the top of the spring (7). The inner wall of the cross (701) is fixedly connected to the outer wall of the connecting tube (603).

8. The device for boiler continuous drainage, constant drainage, and heat recovery according to claim 1, characterized in that: An installation frame (8) is installed on the outer wall of the fixed-displacement expansion container (1). A drive motor (801) is installed on the top of the installation frame (8). A rotating shaft (802) is fixedly connected to the output end of the drive motor (801). A circular gear (803) is fixedly connected to the outer wall of the rotating shaft (802). A gear ring (804) is meshed with the tooth end of the circular gear (803). The bottom of the gear ring (804) is rotatably connected inside the fixed-displacement expansion container (1). A connecting rod (805) is fixedly connected to the bottom of the gear ring (804). A mounting base (806) is fixedly connected to the bottom of the connecting rod (805). A roller (807) is rotatably connected inside the mounting base (806). The outer wall of the roller (807) is set on the top of the annular tube (604).

9. A device for boiler continuous drainage, constant drainage, and heat recovery according to claim 8, characterized in that: The bottom of the rotating shaft (802) is fixedly connected to an active bevel gear (9), the tooth end of the active bevel gear (9) is meshed with a driven bevel gear (901), the inner wall of the driven bevel gear (901) is fixedly connected to a connecting shaft (902), one end of the connecting shaft (902) is rotatably connected to the fixed-displacement expansion container (1), and the outer wall of the connecting shaft (902) is uniformly fixedly connected to stirring blades (903).

10. A method for continuous drainage, constant drainage, and heat recovery of a boiler, characterized in that: An apparatus for boiler continuous drainage, constant drainage, and heat recovery as described in any one of claims 1-9, comprising the following steps: When in use, the boiler’s fixed drainage flows through the fixed drainage inlet branch pipe (3) into the fixed drainage expansion container (1), and the boiler’s continuous drainage flows through the continuous drainage inlet branch pipe (4) into the continuous drainage expansion container (101). High-temperature steam enters the deaerator steam balance pipe (402) through exhaust pipe 1 (401) to heat deaerator 1 (208). Liquid wastewater enters the continuous drainage and demineralized water heat exchanger (405) through gas-liquid two-phase valve (403). Demineralized water pump 1 (406) delivers room temperature demineralized water into the tube heat exchanger. The preheated demineralized water enters deaerator 1 (208) through output pipe (407). External demineralized water enters the annular pipe (604) through the connecting pipe (603) and is sprayed out by the nozzle (605). At the same time, the drive motor (801) is started, which causes the rotating shaft (802) to drive the circular gear (803) to rotate, thereby causing the gear ring (804) and the connecting rod (805) to make circular motion, causing the roller (807) to press the annular pipe (604). With the cooperation of the spring (7), the spraying direction of the annular pipe (604) changes. The rotating shaft (802) synchronously drives the active bevel gear (9) to rotate, which in turn drives the driven bevel gear (901) and the connecting shaft (902) to rotate, so that the stirring blades (903) rotate to prolong the residence time of steam in the fixed discharge expansion vessel (1), and the steam condenses and transfers heat. The fixed discharge mixed wastewater enters the recovery water tank (2) through the drain pipe (201), and the continuous discharge cooling wastewater enters the fixed discharge expansion container (1) through the continuous discharge wastewater pipe (5). After merging, it enters the intermediate hot water tank (203) through the recovery water pump (202), and then is purified by the high temperature mixed bed (205) and buffered by the high temperature demineralized water tank (206). Finally, it is transported to the deaerator (208) by the high temperature demineralized water pump (207).

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