Unit low-side emergency heat supply device

Abstract

The utility model belongs to the field of emergency heat supply devices, and particularly relates to a unit low-side emergency heat supply device. The technical problems that surface dust accumulation is caused when the emergency heat supply device is not used for a long time, and normal work of the device is affected possibly due to heat exchange efficiency reduction and steam flow impact during starting are solved. According to the technical scheme, the unit low-side emergency heat supply device comprises a heat supply assembly; the device further comprises a ventilation assembly, a runner pipe assembly, a cleaning assembly and a buffering assembly. Hot steam is injected into the air inlet pipe and flows into the buffer tank to be buffered, then the pressure reducing valve is opened to enable the hot steam of the air outlet pipe to flow into the inner wall of the tank body to heat the spiral heat exchange pipe, and the second electromagnetic valve can store part of the steam while reducing the pressure of the hot steam. Ineffective outflow of steam of the boiler is reduced, and the problem that the stability of the system is affected by steam flow impact when the emergency heat supply device is started is solved.

Description

Technical Field

[0001] The utility model belongs to the field of emergency heating devices, and in particular relates to a low-side emergency heating device for a unit. Background Art

[0002] In the initial stage of unit startup, the boiler needs to enter the combustion state in advance to generate steam. However, since the turbine may not be ready to receive the generated steam, a mechanism is needed to handle the steam to prevent them from having nowhere to go. This mechanism is the low bypass system, which can guide the reheated steam generated by the boiler to the condenser, thereby ensuring that the steam is properly handled and maintaining the combustion state of the boiler at the same time. The emergency heating device is designed to provide additional heating capacity in an emergency. In the prior art, since these devices may be unused for a long time, dust or dirt is easily accumulated on the surface of the heat exchanger. These accumulations will hinder the effective transfer of heat and cause a decrease in heat exchange efficiency. When the emergency heating device needs to be started, the sudden introduction of a large amount of steam flow may have an impact on the flow and pressure in the heating system, causing fluctuations in the system. Such fluctuations may not only affect the stability of the heating system, but may also make the operation of the emergency heating device itself unstable. Utility Model Content

[0003] In order to overcome the problem that the low-bypass emergency heating device has not been used for a long time, resulting in dust accumulation on the surface, the system stability may be affected during startup due to reduced heat exchange efficiency and steam flow shock.

[0004] The technical solution of the utility model is: a low-bypass emergency heating device for a unit, comprising a heating component; further comprising a ventilation component, a circulation pipe component, a cleaning component and a buffer component; the heating component is provided with a ventilation component for exhaust; the heating component is provided with a circulation pipe component for heating; the heating component is provided with a cleaning component for cleaning; the heating component is provided with a buffer component for buffering.

[0005] Preferably, when it is necessary to use the low-bypass emergency heating device, the buffer assembly is connected to the steam end, and then the steam flows into the heating assembly through the buffer assembly, and the flow pipe assembly is opened to realize water supply. The hot steam contacts the flow pipe assembly in the heating assembly to heat the flow pipe assembly, and then the hot steam is discharged through the ventilation assembly. Condensed water formed by part of the hot steam combining with the air in the ventilation assembly flows out of the ventilation assembly, and the heat source performs subsequent work from the upper end of the flow pipe assembly. When dust cleaning is required before use, the cleaning assembly is connected to the water source, so that water flows through the cleaning assembly into the flow pipe assembly in the heating assembly for flushing. This solves the problem that the emergency heating device has not been used for a long time, resulting in dust accumulation on the surface, and the system stability may be affected due to reduced heat exchange efficiency and steam flow shock when started.

[0006] Preferably, the heating component includes a tank body, a cleaning pipe connecting groove, a water outlet placement groove, an upper circulation groove, a steam pipe connecting groove, a condensate drainage groove, a lower air circulation groove and a water inlet placement groove; the outer wall of the tank body is penetrated by a water inlet placement groove and a steam pipe connecting groove; the upper end of the tank body is penetrated by an upper circulation groove and a water outlet placement groove; the lower end of the tank body is penetrated by a condensate drainage groove and a lower air circulation groove; the outer wall of the tank body is penetrated by evenly distributed cleaning pipe connecting grooves, and the heating work is completed inside the tank body.

[0007] Preferably, the ventilation assembly includes a first ventilation pipe, a second ventilation pipe, a drain pipe and a first solenoid valve; the first ventilation pipe is fixedly connected to the inner wall of the upper circulation groove; the second ventilation pipe is fixedly connected to the inner wall of the lower air circulation groove; the drain pipe is fixedly connected to the inner wall of the condensate drain groove; the first solenoid valve is arranged on the drain pipe, and the hot steam is finally discharged from the upper end of the first ventilation pipe, and the condensate is deposited at the lower end of the inner wall of the tank body, and can be discharged from the drain pipe by opening the first solenoid valve.

[0008] Preferably, the circulation pipe assembly includes a first water inlet pipe, a second solenoid valve, a spiral heat exchange tube, an L-shaped discharge pipe and a third solenoid valve; the first water inlet pipe is fixedly connected to the inner wall of the water inlet end placement groove; the first water inlet pipe is provided with a second solenoid valve; the L-shaped discharge pipe is fixedly connected to the inner wall of the water outlet end placement groove; the third solenoid valve is provided on the L-shaped discharge pipe; the first water inlet pipe is fixedly connected to a spiral heat exchange tube at one end passing through the outer wall of the tank body; the L-shaped discharge pipe and the first water inlet pipe are connected through the spiral heat exchange tube, and the first water inlet pipe is connected to the water source interface, and normal temperature water enters from the first water inlet pipe and opens the second solenoid valve to allow the liquid to flow into the spiral heat exchange tube and come into contact with the hot steam on the outer wall of the spiral heat exchange tube, thereby heating the liquid in the spiral heat exchange tube, and finally opens the third solenoid valve to discharge it from the L-shaped discharge pipe for subsequent heating work.

[0009] Preferably, the cleaning component includes an L-shaped hollow block, a water outlet groove, a first connecting pipe, a second connecting pipe, a third connecting pipe and a second water inlet pipe; the inner wall of the cleaning pipe connecting groove is fixedly connected with the L-shaped hollow block; the end of the L-shaped hollow block close to the axis of the tank body is provided with an evenly distributed water outlet groove; the end of the L-shaped hollow block away from the axis of the tank body is fixedly connected with the first connecting pipe in a through-type manner; the outer wall of the first connecting pipe is fixedly connected with the second connecting pipe; two adjacent second connecting pipes are connected by a third connecting pipe; there are three third connecting pipes; the outer wall of one of the third connecting pipes is fixedly connected with the second water inlet pipe in a through-type manner, and when the spiral heat exchange tube needs to be cleaned, water is injected into the second water inlet pipe, so that the water flows through the third connecting pipe, the second connecting pipe and the first connecting pipe and finally flows into the L-shaped hollow block, and is sprayed to the outer wall of the second solenoid valve through the water outlet groove on the L-shaped hollow block to clean the outer wall of the second solenoid valve.

[0010] Preferably, the buffer assembly includes a buffer tank, an air inlet pipe and an air outlet pipe; the buffer tank is arranged outside the tank body; the air inlet pipe and the air outlet pipe are fixedly connected to the upper end of the buffer tank in a through-type manner; the other end of the air outlet pipe is fixedly connected to the inner wall of the steam pipe connecting groove; a pressure reducing valve is arranged on the air outlet pipe, and when the emergency heating device is needed, hot steam is injected into the air inlet pipe to make the steam flow into the buffer tank for buffering, and then the pressure reducing valve is opened to make the hot steam from the air outlet pipe flow into the inner wall of the tank body to heat the spiral heat exchange tube, and the second solenoid valve can store part of the steam while reducing the pressure of the hot steam, thereby reducing the ineffective outflow of steam from the boiler.

[0011] Preferably, the ventilation assembly includes a connecting groove; the outer wall of the second ventilation pipe and the end of the inner wall of the first ventilation pipe close to each other form a connecting groove, and cold air enters from the second ventilation pipe, contacts with the hot steam, and contacts in the connecting groove to produce condensed water.

[0012] Beneficial effects of the utility model:

[0013] 1. By injecting hot steam into the air inlet pipe, the steam flows into the buffer tank for buffering, and then the pressure reducing valve is opened to allow the hot steam from the air outlet pipe to flow into the inner wall of the tank body to heat the spiral heat exchange tube. The second solenoid valve can store part of the steam while reducing the hot steam pressure, reducing the ineffective outflow of steam from the boiler, and solving the problem of steam flow impact when the emergency heating device is started and affecting the system stability;

[0014] 2. By injecting water into the second water inlet pipe, the water flows through the third connecting pipe, the second connecting pipe and the first connecting pipe and finally flows into the L-shaped hollow block, and is sprayed to the outer wall of the second solenoid valve through the water outlet groove on the L-shaped hollow block to clean the outer wall of the second solenoid valve, thereby solving the problem that the heat exchange efficiency may be affected by dust on the surface when starting the emergency heating device;

[0015] 3. By connecting the first water inlet pipe to the water source interface, normal temperature water enters from the first water inlet pipe. By opening the second solenoid valve, the liquid flows into the spiral heat exchange tube and comes into contact with the hot steam on the outer wall of the spiral heat exchange tube, thereby heating the liquid in the spiral heat exchange tube. Finally, the third solenoid valve is opened to discharge the liquid from the L-shaped discharge pipe for subsequent heating work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a low-side emergency heating device for a unit of the utility model;

[0017] Figure 2 What is shown is a three-dimensional structural cross-sectional schematic diagram of a heating component and a ventilation component of a low-side emergency heating device for a unit of the utility model;

[0018] Figure 3What is shown is a three-dimensional structural schematic diagram of a flow pipe assembly of a low-side emergency heating device of a unit according to the utility model;

[0019] Figure 4 Shown is a three-dimensional structural schematic diagram of a cleaning component of a low-side emergency heating device of a unit according to the utility model.

[0020] The markings in the attached drawings are: 1-heating component, 101-tank body, 102-cleaning pipe connecting groove, 103-water outlet placement groove, 104-upper circulation groove, 105-steam pipe connecting groove, 106-condensate drainage groove, 107-lower air circulation groove, 108-water inlet placement groove, 2-ventilation component, 201-first ventilation pipe, 202-second ventilation pipe, 203-drainage pipe, 204-first solenoid valve, 205-connecting groove, 3-circulation pipe group Parts, 301-first water inlet pipe, 302-second solenoid valve, 303-spiral heat exchange tube, 304-L-shaped discharge pipe, 305-third solenoid valve, 4-cleaning assembly, 401-L-shaped hollow block, 402-water outlet trough, 403-first connecting pipe, 404-second connecting pipe, 405-third connecting pipe, 406-second water inlet pipe, 5-buffer assembly, 501-buffer tank, 502-inlet pipe, 503-outlet pipe, 504-pressure reducing valve. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1 The utility model provides an embodiment: a low-bypass emergency heating device for a unit, comprising a heating component 1; further comprising a ventilation component 2, a circulation pipe component 3, a cleaning component 4 and a buffer component 5; the heating component 1 is provided with a ventilation component 2 for exhaust; the heating component 1 is provided with a circulation pipe component 3 for heating; the heating component 1 is provided with a cleaning component 4 for cleaning; the heating component 1 is provided with a buffer component 5 for buffering.

[0023] See also Figure 1 In this embodiment, the buffer assembly 5 includes a buffer tank 501, an air inlet pipe 502 and an air outlet pipe 503; the buffer tank 501 is arranged outside the tank body 101; the upper end of the buffer tank 501 is fixedly connected with the air inlet pipe 502 and the air outlet pipe 503 in a through-type manner; the other end of the air outlet pipe 503 is fixedly connected to the inner wall of the steam pipe connecting groove 105; and a pressure reducing valve 504 is arranged on the air outlet pipe 503.

[0024] See also Figure 2In this embodiment, the heating component 1 includes a tank body 101, a cleaning pipe connecting groove 102, a water outlet placement groove 103, an upper circulation groove 104, a steam pipe connecting groove 105, a condensate drainage groove 106, a lower air circulation groove 107 and a water inlet placement groove 108; the outer wall of the tank body 101 is penetrated with a water inlet placement groove 108 and a steam pipe connecting groove 105; the upper circulation groove 104 and the water outlet placement groove 103 are penetrated at the upper end of the tank body 101; the condensate drainage groove 106 and the lower air circulation groove 107 are penetrated at the lower end of the tank body 101; the outer wall of the tank body 101 is penetrated with There are uniformly distributed cleaning pipe connecting grooves 102, and the ventilation component 2 includes a first ventilation pipe 201, a second ventilation pipe 202, a drain pipe 203 and a first solenoid valve 204; the inner wall of the upper circulation groove 104 is fixedly connected to the first ventilation pipe 201; the inner wall of the lower air circulation groove 107 is fixedly connected to the second ventilation pipe 202; the inner wall of the condensate drain groove 106 is fixedly connected to the drain pipe 203; the first solenoid valve 204 is arranged on the drain pipe 203, and the ventilation component 2 includes a connecting groove 205; the outer wall of the second ventilation pipe 202 and the end of the inner wall of the first ventilation pipe 201 close to each other form a connecting groove 205.

[0025] See also Figure 3 In this embodiment, the circulation pipe assembly 3 includes a first water inlet pipe 301, a second solenoid valve 302, a spiral heat exchange tube 303, an L-shaped discharge pipe 304 and a third solenoid valve 305; the first water inlet pipe 301 is fixedly connected to the inner wall of the water inlet end placement groove 108; the second solenoid valve 302 is arranged on the first water inlet pipe 301; the L-shaped discharge pipe 304 is fixedly connected to the inner wall of the water outlet end placement groove 103; the third solenoid valve 305 is arranged on the L-shaped discharge pipe 304; one end of the first water inlet pipe 301 passing through the outer wall of the tank body 101 is fixedly connected to the spiral heat exchange tube 303; the L-shaped discharge pipe 304 and the first water inlet pipe 301 are connected through the spiral heat exchange tube 303.

[0026] See also Figure 4 In this embodiment, the cleaning component 4 includes an L-shaped hollow block 401, a water outlet groove 402, a first connecting pipe 403, a second connecting pipe 404, a third connecting pipe 405 and a second water inlet pipe 406; the inner wall of the cleaning pipe connecting groove 102 is fixedly connected with the L-shaped hollow block 401; the end of the L-shaped hollow block 401 close to the axis line of the tank body 101 is provided with a uniformly distributed water outlet groove 402; the end of the L-shaped hollow block 401 away from the axis line of the tank body 101 is fixedly connected with the first connecting pipe 403 in a through-type manner; the outer wall of the first connecting pipe 403 is fixedly connected with the second connecting pipe 404; two adjacent second connecting pipes 404 are connected by a third connecting pipe 405; three third connecting pipes 405 are provided; the outer wall of one of the third connecting pipes 405 is fixedly connected with the second water inlet pipe 406 in a through-type manner.

[0027] When the emergency heating device is needed, hot steam is injected into the air inlet pipe 502 to make the steam flow into the buffer tank 501 for buffering, and then the pressure reducing valve 504 is opened to make the hot steam of the air outlet pipe 503 flow into the inner wall of the tank body 101 to heat the spiral heat exchange tube 303. The second solenoid valve 302 can store part of the steam while reducing the pressure of the hot steam, thereby reducing the ineffective outflow of steam from the boiler;

[0028] Then, the first water inlet pipe 301 is connected to the water source interface, and normal temperature water enters from the first water inlet pipe 301. The second solenoid valve 302 is opened, so that the liquid flows into the spiral heat exchange tube 303, and contacts with the hot steam on the outer wall of the spiral heat exchange tube 303, so that the liquid in the spiral heat exchange tube 303 is heated, and finally the third solenoid valve 305 is opened to discharge from the L-shaped discharge pipe 304 for subsequent heating work;

[0029] When the spiral heat exchange tube 303 needs to be cleaned, water is injected into the second water inlet pipe 406, so that the water flows through the third connecting pipe 405, the second connecting pipe 404 and the first connecting pipe 403 and finally flows into the L-shaped hollow block 401, and is sprayed onto the outer wall of the second solenoid valve 302 through the water outlet groove 402 on the L-shaped hollow block 401, thereby cleaning the outer wall of the second solenoid valve 302.

[0030] Through the above steps, when the low bypass emergency heating device is needed, the buffer component 5 is connected to the steam end, and then the steam flows into the heating component 1 through the buffer component 5, and the flow pipe component 3 is opened to realize water supply. The hot steam contacts the flow pipe component 3 in the heating component 1, heats the flow pipe component 3, and then the hot steam is discharged through the ventilation component 2. Condensed water formed by part of the hot steam combining with the air in the ventilation component 2 flows out from the ventilation component 2, and the heat source performs subsequent work from the upper end of the flow pipe component 3. When dust cleaning is required before use, the cleaning component 4 is connected to the water source, so that the water flows through the cleaning component 4 into the flow pipe component 3 in the heating component 1 for flushing. This solves the problem that the emergency heating device has not been used for a long time, resulting in dust accumulation on the surface, and the system stability may be affected due to reduced heat exchange efficiency and steam flow impact when started.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A low-side emergency heating device for a unit, comprising a heating component (1); characterized in that: The heating component (1) further comprises a ventilation component (2), a circulation pipe component (3), a cleaning component (4) and a buffer component (5); the heating component (1) is provided with a ventilation component (2) for exhausting air; the heating component (1) is provided with a circulation pipe component (3) for heating; the heating component (1) is provided with a cleaning component (4) for cleaning; and the heating component (1) is provided with a buffer component (5) for buffering.

2. The low-side emergency heating device of a unit according to claim 1, characterized in that: The heating component (1) comprises a tank body (101), a cleaning pipe connecting groove (102), a water outlet placement groove (103), an upper circulation groove (104), a steam pipe connecting groove (105), a condensed water drainage groove (106), a lower air circulation groove (107) and a water inlet placement groove (108); the outer wall of the tank body (101) is penetrated by a water inlet placement groove (108) and a steam pipe connecting groove (105); the upper end of the tank body (101) is penetrated by an upper circulation groove (104) and a water outlet placement groove (103); the lower end of the tank body (101) is penetrated by a condensed water drainage groove (106) and a lower air circulation groove (107); and the outer wall of the tank body (101) is penetrated by evenly distributed cleaning pipe connecting grooves (102).

3. The low-side emergency heating device of a unit according to claim 2, characterized in that: The ventilation assembly (2) comprises a first ventilation pipe (201), a second ventilation pipe (202), a drainage pipe (203) and a first solenoid valve (204); the first ventilation pipe (201) is fixedly connected to the inner wall of the upper circulation groove (104); the second ventilation pipe (202) is fixedly connected to the inner wall of the lower air circulation groove (107); the drainage pipe (203) is fixedly connected to the inner wall of the condensate drainage groove (106); and the first solenoid valve (204) is arranged on the drainage pipe (203).

4. The low-side emergency heating device of a unit according to claim 2, characterized in that: The circulation pipe assembly (3) comprises a first water inlet pipe (301), a second solenoid valve (302), a spiral heat exchange pipe (303), an L-shaped discharge pipe (304) and a third solenoid valve (305); the first water inlet pipe (301) is fixedly connected to the inner wall of the water inlet end placement groove (108); the second solenoid valve (302) is arranged on the first water inlet pipe (301); the L-shaped discharge pipe (304) is fixedly connected to the inner wall of the water outlet end placement groove (103); the third solenoid valve (305) is arranged on the L-shaped discharge pipe (304); one end of the first water inlet pipe (301) passing through the outer wall of the tank body (101) is fixedly connected to the spiral heat exchange pipe (303); the L-shaped discharge pipe (304) and the first water inlet pipe (301) are connected via the spiral heat exchange pipe (303).

5. The low-side emergency heating device of a unit according to claim 2, characterized in that: The cleaning component (4) comprises an L-shaped hollow block (401), a water outlet groove (402), a first connecting pipe (403), a second connecting pipe (404), a third connecting pipe (405) and a second water inlet pipe (406); the inner wall of the cleaning pipe connecting groove (102) is fixedly connected with the L-shaped hollow block (401); the end of the L-shaped hollow block (401) close to the axis of the tank body (101) is provided with evenly distributed water outlet grooves (402); the end of the L-shaped hollow block (401) away from the axis of the tank body (101) is fixedly connected with the first connecting pipe (403) in a through-type manner; the outer wall of the first connecting pipe (403) is fixedly connected with the second connecting pipe (404); two adjacent second connecting pipes (404) are connected by a third connecting pipe (405); three third connecting pipes (405) are provided; and the outer wall of one of the third connecting pipes (405) is fixedly connected with the second water inlet pipe (406) in a through-type manner.

6. The low-side emergency heating device of a unit according to claim 2, characterized in that: The buffer assembly (5) comprises a buffer tank (501), an air inlet pipe (502) and an air outlet pipe (503); the buffer tank (501) is arranged outside the tank body (101); the air inlet pipe (502) and the air outlet pipe (503) are fixedly connected to the upper end of the buffer tank (501); the other end of the air outlet pipe (503) is fixedly connected to the inner wall of the steam pipe connecting groove (105); and a pressure reducing valve (504) is arranged on the air outlet pipe (503).

7. The low-side emergency heating device of a unit according to claim 3, characterized in that: The ventilation assembly (2) comprises a connecting groove (205); the connecting groove (205) is formed at one end where the outer wall of the second ventilation pipe (202) and the inner wall of the first ventilation pipe (201) are close to each other.

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