Steam supply system based on water as heat carrier

Abstract

The invention discloses a steam supply system based on water as a heat carrier, which comprises a water supply tank, a boiler, a user side, a water supply pump, a steam energy storage device, a valve assembly and an electric control system, a water outlet of the water feeding pump is connected with a water injection pipe of the steam energy storage device and a water injection opening of the boiler through pipelines, and a steam outlet of the boiler is connected with the user side through a pipeline. Steam enters through the steam injection pipe and the spray head and then flows into water at the bottom of the inner cavity of the tank body to heat the water, and then the steam floats upwards to be stored in the steam space and waits to be discharged from the steam discharging pipe, so that energy storage of the steam is achieved, and load fluctuation is balanced. After steam in the steam space passes through the shell and the shutter type steam-water separation device, the steam is discharged from the steam discharge pipe, steam-water separation is achieved when the steam passes through the shutter type steam-water separation device, and water entering a user side behind is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a steam supply system, in particular to a steam supply system based on water as a heat carrier. BACKGROUND

[0002] In the prior art, the steam consumption of high-salinity water treatment plants fluctuates greatly, and the evaporation capacity of existing steam boilers does not match the actual steam consumption, resulting in frequent start-stop of the boiler, insufficient combustion, and serious waste of fuel gas. The traditional steam supply system lacks effective energy storage devices, which cannot balance the load fluctuations, resulting in low operating efficiency of the boiler, low overall energy utilization rate of the supply system, and frequent start-stop accelerating the wear and tear of the boiler, increasing maintenance costs. SUMMARY

[0003] The purpose of the present application is to provide a steam supply system based on water as a heat carrier to solve the above technical problems.

[0004] To achieve the above purpose, the following technical solutions are adopted: A steam supply system based on water as a heat carrier, comprising a feed water tank, a boiler, a user end, a feed water pump, a steam energy storage device, a valve assembly, and an electric control system. The feed water tank is connected to the suction port of the feed water pump through a pipeline. The drain port of the feed water pump is connected to the water injection pipe of the steam energy storage device and the water injection port of the boiler through pipelines. The steam discharge port of the boiler is connected to the user end through a pipeline. Multiple user ends are connected in series as a whole and are connected to the steam injection pipe and the steam discharge pipe of the steam energy storage device through pipelines, respectively. The drain pipe of the steam energy storage device is connected to the feed water tank through a pipeline. Each pipeline is provided with a valve assembly for controlling the on-off. The steam energy storage device comprises a tank body, a water injection pipe, a steam injection pipe, a steam discharge pipe, a drain pipe, a liquid level meter, a safety valve, and a pressure gauge. The tank body is fixedly connected to the water injection pipe, the steam injection pipe, the steam discharge pipe, and the drain pipe, respectively. The water injection pipe and the drain pipe are located at the bottom of the tank body. The steam discharge pipe is located at the upper part of the tank body. The steam injection pipe extends to the bottom of the inner cavity of the tank body at the penetration position, and a spray head is installed at the penetration position of the steam injection pipe in the inner cavity of the tank body. The steam energy storage device is also provided with a liquid level meter, a safety valve, and a pressure gauge. The liquid level meter, the safety valve, and the pressure gauge are connected to the inner cavity of the tank body, respectively. The feed water pump is controlled by an electric control system.

[0005] On the basis of the above technical solution, the tank body comprises a main body, a shell, and a base. The base is fixed to the bottom of the main body. A safety pipe and a monitoring pipe are fixedly connected to the upper part of the main body. The safety pipe is installed with a safety valve, and the monitoring pipe is installed with a pressure gauge. Multiple shells are fixedly connected to the upper part of the tank body and are fixedly connected to the steam discharge pipes, respectively. Each shell is closed and fixed with a louvered steam-water separation device.

[0006] On the basis of the above technical scheme, the steam injection pipe comprises a main pipe and a sub pipe, the main pipe is fixedly communicated with the tank body and extends into the inner cavity of the tank body, and is connected with the user end through a pipeline, a plurality of vertical sub pipes are fixedly communicated at the bottom of the main pipe, the nozzle comprises a rotating body, a main spray hole, a sub spray hole and a blade, the hollow rotating body is coaxially and rotatably connected to the bottom of each sub pipe, a plurality of main spray holes are vertically and penetratively arranged on the bottom of the rotating body, a plurality of horizontal sub spray holes are eccentrically and penetratively arranged on the side of the rotating body at equal angles, and a plurality of blades are fixedly arranged on the vortex circumferential wall of the rotating body at equal angles.

[0007] On the basis of the above technical scheme, the vortex rotating directions of the blades where the rotating bodies are located are the same, and the eccentric directions of the sub spray holes where the rotating bodies are located are not the same.

[0008] On the basis of the above technical scheme, the user end comprises a high-pressure user and a low-pressure user which are connected in series, the steam outlet of the boiler is connected with the high-pressure user and the low-pressure user through pipelines in sequence, the output end of the high-pressure user is connected with the input end of the low-pressure user through a pipeline, the output end of the high-pressure user is also connected with the steam injection pipe through a pipeline, and the exhaust steam pipe is connected with the input end of the low-pressure user through a pipeline.

[0009] On the basis of the above technical scheme, the valve assembly comprises a plurality of automatic regulating valves, check valves and stop valves, the stop valves are arranged between the drain pipe and the water tank, between the water pump and the water injection pipe, between the water pump and the water inlet of the boiler, between the steam outlet of the boiler and the high-pressure user, between the output end of the high-pressure user and the steam injection pipe, between the exhaust steam pipe and the input end of the low-pressure user, and between the output end of the high-pressure user and the input end of the low-pressure user, the check valves are arranged between the water pump and the water injection pipe, between the water pump and the water inlet of the boiler, between the output end of the high-pressure user and the steam injection pipe, between the exhaust steam pipe and the input end of the low-pressure user, and between the output end of the high-pressure user and the input end of the low-pressure user, and the automatic regulating valves are arranged between the output end of the high-pressure user and the steam injection pipe and between the exhaust steam pipe and the input end of the low-pressure user.

[0010] Compared with the prior art, the application has the following advantages: steam enters the water in the inner cavity of the tank body through the steam injection pipe and the nozzle, heats the water, and then floats and is stored in the steam space, waiting to be discharged from the exhaust steam pipe, so as to realize energy storage of steam and balance load fluctuation.

[0011] When the steam in the steam space passes through the shell and the louvered steam-water separation device, the steam is discharged from the exhaust steam pipe, and the steam-water separation is realized when the steam passes through the louvered steam-water separation device, so as to reduce the water entering the subsequent user end, thereby reducing inconvenience and water waste, and improving operation efficiency and energy utilization rate.

[0012] And since the sub-injection hole is eccentrically arranged compared with the rotating body, the rotating body can be driven to rotate along the sub-pipe, thereby driving the blade to rotate, then stirring the water in the water volume and transporting it upwards or downwards, and the rotating direction or rotating speed of each rotating body is not the same, so that the blade can produce different transport effects when following the rotating body to move, so that the steam and water can be fully contacted, improve the heat exchange efficiency, and improve the operation efficiency and energy utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the system of the present application.

[0014] Figure 2 It is a schematic diagram of the shaft side structure of the steam energy storage device of the present application.

[0015] Figure 3 It is a schematic diagram of the front section structure of the tank body of the present application.

[0016] Figure 4 It is a schematic diagram of the upper section structure of the nozzle of the present application.

[0017] In the figure: 1, water supply tank, 2, boiler, 3, user end, 4, water supply pump, 5, steam energy storage device, 7, tank body, 8, water filling pipe, 9, steam filling pipe, 10, steam discharge pipe, 11, water discharge pipe, 12, liquid level meter, 13, safety valve, 14, pressure gauge, 15, main body, 16, shell, 17, safety pipe, 18, monitoring pipe, 19, louver type steam-water separation device, 20, main pipe, 21, sub-pipe, 22, high-pressure user, 23, low-pressure user, 24, automatic regulating valve, 25, check valve, 26, stop valve, 27, nozzle, 28, rotating body, 29, main injection hole, 30, sub-injection hole, 31, blade, 32, base. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0019] As Figures 1-4As shown, a steam supply system based on water as a heat carrier includes a water tank 1, a boiler 2, user terminals 3, a water pump 4, a steam energy storage device 5, valve assemblies, and an electrical control system. The water tank 1 is connected to the suction port of the water pump 4 via a pipe. The discharge port of the water pump 4 is connected to the water injection pipe 8 of the steam energy storage device 5 and the water injection port of the boiler 2 via pipes. The steam discharge port of the boiler 2 is connected to the user terminals 3 via a pipe. Multiple user terminals 3 are connected in series as a whole and are sequentially connected to the steam injection pipe 9 and the steam discharge pipe 10 of the steam energy storage device 5 via pipes. The discharge pipe 11 of the steam energy storage device 5 is connected to the water tank 1 via a pipe. Each pipe is equipped with a valve assembly for controlling the on / off state. The steam energy storage device 5 includes a tank body 7, a water injection pipe 8, a steam injection pipe 9, a steam exhaust pipe 10, a drain pipe 11, a level gauge 12, a safety valve 13, and a pressure gauge 14. The tank body 7 is fixedly connected to the water injection pipe 8, the steam injection pipe 9, the steam exhaust pipe 10, and the drain pipe 11. The water injection pipe 8 and the drain pipe 11 are located at the bottom of the tank body 7, and the steam exhaust pipe 10 is located at the top of the tank body 7. The steam injection pipe 9 extends to the bottom of the inner cavity of the tank body 7 at its penetration point, and a nozzle 27 is installed at the penetration point of the steam injection pipe 9 in the inner cavity of the tank body 7. The steam energy storage device 5 is also equipped with a level gauge 12, a safety valve 13, and a pressure gauge 14. The level gauge 12, the safety valve 13, and the pressure gauge 14 are respectively connected to the inner cavity of the tank body 7. The water pump 4 is controlled by an electronic control system.

[0020] In use, the lower part of the inner cavity of tank 7 is a water volume, and the upper part is a steam space, serving as a pressure vessel for storing hot water and steam. The feed water pump 4 operates as needed, drawing water from the feed water tank 1 to replenish the boiler 2 and tank 7. The water in tank 7 can flow back into the feed water tank 1. The steam generated by the boiler 2 is slightly consumed by the user end 3 and enters the steam energy storage device 5 through the steam injection pipe 9 for storage. It is then discharged to the next user end 3 through the exhaust pipe 10 as needed. The steam enters through the steam injection pipe 9 and the nozzle 27 and flows into the water at the bottom of the inner cavity of tank 7 to heat the water. The steam then floats to the surface and is stored in the steam space, waiting to be discharged through the exhaust pipe 10. This achieves the storage of steam and balances load fluctuations. The level gauge 12, safety valve 13, and pressure gauge 14 are conventional safety protection devices for pressure vessels. Their functions are to observe the water volume in tank 7, to release steam when the pressure is too high, and to monitor the pressure in tank 7, respectively.

[0021] The tank 7 includes a main body 15, a shell 16, and a base 32. The base 32 is fixed to the bottom of the main body 15. A safety pipe 17 and a monitoring pipe 18 are fixedly connected to the upper part of the main body 15. The safety pipe 17 is installed with a safety valve 13, and the monitoring pipe 18 is installed with a pressure gauge 14. Multiple shells 16 are fixedly connected to the upper part of the tank 7 and are respectively fixedly connected to the exhaust pipe 10. A louvered steam-water separator 19 is closed and fixed inside each shell 16.

[0022] Furthermore, after the steam in the steam space passes through the shell 16 and the louvered steam-water separator 19, it is discharged from the exhaust pipe 10. The steam is separated into steam and water as it passes through the louvered steam-water separator 19, reducing the amount of water entering the downstream user end 3, thereby reducing inconvenience and water waste, and improving operating efficiency and energy utilization.

[0023] The steam injection pipe 9 includes a main pipe 20 and a secondary pipe 21. The main pipe 20 is fixedly connected to the tank body 7 and extends into the inner cavity of the tank body 7. It is also connected to the user terminal 3 through a pipe. The bottom of the main pipe 20 is fixedly connected to multiple vertical secondary pipes 21. The nozzle 27 includes a rotating body 28, a main nozzle 29, a secondary nozzle 30, and blades 31. The bottom of each secondary pipe 21 is coaxially rotatably connected to a hollow rotating body 28. The bottom of the rotating body 28 has multiple main nozzles 29 penetrating vertically, and multiple horizontal secondary nozzles 30 penetrating at equal angles on its side circumference. The outer circumferential wall of the rotating body 28 has multiple blades 31 fixed at equal angles on its vortex-shaped circumference.

[0024] Furthermore, steam enters the secondary pipe 21 through the main pipe 20, then enters the rotating body 28 and is discharged into the water through the main nozzle 29 and the secondary nozzle 30. Since the secondary nozzle 30 is eccentrically positioned relative to the rotating body 28, it can drive the rotating body 28 to rotate along the secondary pipe 21, thereby driving the blades 31 to rotate, which in turn stirs the water in the water volume and transports it upward or downward, so that the steam and water can fully contact each other, improve the heat exchange efficiency, and thus improve the operating efficiency and energy utilization rate.

[0025] The vortex rotation direction of the blades 31 where each of the rotating bodies 28 is located is the same, but the eccentricity direction of the auxiliary nozzles 30 where each of the rotating bodies 28 is located is not exactly the same.

[0026] Furthermore, through the above-mentioned arrangement, the rotation direction or rotation speed of each rotating body 28 can be different, so that the blades 31 can produce different conveying effects when moving with the rotating body 28. For example, some convey water upwards and some convey water downwards, so that the water can flow fully and be heated evenly, thereby improving heat exchange efficiency and improving operating efficiency and energy utilization.

[0027] The user terminal 3 includes a high-pressure user 22 and a low-pressure user 23 connected in series. The steam outlet of the boiler 2 is connected to the high-pressure user 22 and the low-pressure user 23 in sequence through pipes. The output end of the high-pressure user 22 is connected to the input end of the low-pressure user 23 through pipes. The output end of the high-pressure user 22 is also connected to the steam injection pipe 9 through pipes. The exhaust pipe 10 is connected to the input end of the low-pressure user 23 through pipes.

[0028] The valve assembly includes multiple automatic regulating valves 24, check valves 25, and shut-off valves 26. Shut-off valves 26 are respectively installed between the drain pipe 11 and the water tank 1, between the water pump 4 and the water injection pipe 8, between the water pump 4 and the water injection port of the boiler 2, between the steam outlet of the boiler 2 and the high-pressure user 22, between the output end of the high-pressure user 22 and the steam injection pipe 9, between the exhaust pipe 10 and the input end of the low-pressure user 23, and between the output end of the high-pressure user 22 and the input end of the low-pressure user 23. Check valves 25 are respectively installed between the water pump 4 and the water injection pipe 8, between the water pump 4 and the water injection port of the boiler 2, between the output end of the high-pressure user 22 and the steam injection pipe 9, between the exhaust pipe 10 and the input end of the low-pressure user 23, and between the output end of the high-pressure user 22 and the input end of the low-pressure user 23. Automatic regulating valves 24 are respectively installed between the output end of the high-pressure user 22 and the steam injection pipe 9, and between the exhaust pipe 10 and the input end of the low-pressure user 23.

[0029] The above description represents a preferred embodiment of the present invention. For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention, based on the teachings of the present invention, still fall within the protection scope of the present invention.

Claims

1. A steam supply system based on water as a heat carrier, comprising a feedwater tank (1), a boiler (2), a user terminal (3), a feedwater pump (4), a steam energy storage device (5), valve assemblies, and an electrical control system, characterized in that: The water tank (1) is connected to the suction port of the water pump (4) via a pipe. The drain port of the water pump (4) is connected to the water injection pipe (8) of the steam energy storage device (5) and the water injection port of the boiler (2) via pipes. The steam outlet of the boiler (2) is connected to the user terminal (3) via a pipe. Multiple user terminals (3) are connected in series as a whole and are connected to the steam injection pipe (9) and steam exhaust pipe (10) of the steam energy storage device (5) via pipes. The drain pipe (11) of the steam energy storage device (5) is connected to the water tank (1) via a pipe. Each of the pipes is equipped with a valve assembly for controlling the on / off state. The steam energy storage device (5) includes a tank (7), a water injection pipe (8), a steam injection pipe (9), a steam exhaust pipe (10), and a drain pipe (11). The tank (7) is equipped with a level gauge (12), a safety valve (13), and a pressure gauge (14). The tank (7) is fixedly connected to a water injection pipe (8), a steam injection pipe (9), a steam exhaust pipe (10), and a drain pipe (11). The water injection pipe (8) and the drain pipe (11) are located at the bottom of the tank (7). The steam exhaust pipe (10) is located at the top of the tank (7). The steam injection pipe (9) extends to the bottom of the inner cavity of the tank (7) at the penetration point. A nozzle (27) is installed at the penetration point of the steam injection pipe (9) in the inner cavity of the tank (7). The steam energy storage device (5) is also equipped with a level gauge (12), a safety valve (13), and a pressure gauge (14). The level gauge (12), the safety valve (13), and the pressure gauge (14) are connected to the inner cavity of the tank (7). The water pump (4) is controlled by an electronic control system.

2. A steam supply system based on water as a heat carrier according to claim 1, characterized in that: The tank (7) includes a main body (15), a shell (16) and a base (32). The base (32) is fixed at the bottom of the main body (15). A safety pipe (17) and a monitoring pipe (18) are fixedly connected to the upper part of the main body (15). The safety pipe (17) is installed with a safety valve (13). The monitoring pipe (18) is installed with a pressure gauge (14). Multiple shells (16) are fixedly connected to the upper part of the tank (7) and are respectively fixedly connected to the exhaust pipe (10). A louvered steam-water separator (19) is closed and fixed inside each shell (16).

3. A steam supply system based on water as a heat carrier according to claim 1, characterized in that: The steam injection pipe (9) includes a main pipe (20) and a secondary pipe (21). The main pipe (20) is fixedly connected to the tank body (7) and extends into the inner cavity of the tank body (7). It is also connected to the user end (3) through a pipe. The bottom of the main pipe (20) is fixedly connected to multiple vertical secondary pipes (21). The nozzle (27) includes a rotating body (28), a main nozzle (29), a secondary nozzle (30), and blades (31). The bottom of each secondary pipe (21) is coaxially connected to a hollow rotating body (28). The bottom of the rotating body (28) has multiple main nozzles (29) penetrating vertically, and the side circumference has multiple horizontal secondary nozzles (30) penetrating at an eccentric angle. The outer circumferential wall of the rotating body (28) has multiple blades (31) fixed at an eccentric angle.

4. A steam supply system based on water as a heat carrier according to claim 3, characterized in that: The vortex rotation direction of the blades (31) where each of the rotating bodies (28) is located is the same, and the eccentric direction of the auxiliary nozzles (30) where each of the rotating bodies (28) is located is not the same.

5. A steam supply system based on water as a heat carrier according to any one of claims 1-4, characterized in that: The user terminal (3) includes a high-pressure user (22) and a low-pressure user (23) connected in series. The steam outlet of the boiler (2) is connected to the high-pressure user (22) and the low-pressure user (23) in sequence through pipes. The output end of the high-pressure user (22) is connected to the input end of the low-pressure user (23) through pipes. The output end of the high-pressure user (22) is also connected to the steam injection pipe (9) through pipes. The exhaust pipe (10) is connected to the input end of the low-pressure user (23) through pipes.

6. A steam supply system based on water as a heat carrier according to claim 5, characterized in that: The valve assembly includes multiple automatic regulating valves (24), check valves (25), and shut-off valves (26). The following connections are respectively established between the drain pipe (11) and the water tank (1), between the water pump (4) and the water injection pipe (8), between the water pump (4) and the water injection port of the boiler (2), between the steam outlet of the boiler (2) and the high-pressure user (22), between the output end of the high-pressure user (22) and the steam injection pipe (9), between the exhaust pipe (10) and the input end of the low-pressure user (23), and between the output end of the high-pressure user (22) and the input end of the low-pressure user (23). There is a shut-off valve (26). Check valves (25) are respectively installed between the water supply pump (4) and the water injection pipe (8), between the water supply pump (4) and the water injection port of the boiler (2), between the output end of the high-pressure user (22) and the steam injection pipe (9), between the exhaust pipe (10) and the input end of the low-pressure user (23), and between the output end of the high-pressure user (22) and the input end of the low-pressure user (23). Automatic regulating valves (24) are respectively installed between the output end of the high-pressure user (22) and the steam injection pipe (9), and between the exhaust pipe (10) and the input end of the low-pressure user (23).

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