Energy recovery device of boiler periodic blowdown flash tank
By designing an energy recovery device for the boiler's regular sewage blowdown expansion vessel, the steam-water mixing heater is used to recover the heat and condensation water of the exhaust steam, which solves the problem of waste of exhaust steam heat, improves the working environment and reduces energy consumption.
Patent Information
- Application Number
- CN202411200361.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-01-24
AI Technical Summary
In the regular sewage expansion container in the boiler room, the exhaust steam is directly emptied, resulting in waste of heat and affecting the working environment.
An energy recovery device for the boiler's regular sewage blowdown expansion vessel is designed. By connecting the stop valve, steam flow meter, electric steam exhaust valve, steam and water mixing heater, normal temperature water electric regulating valve, gas and water mixture separation device and hot water booster pump, Use a steam-water mixing heater to mix the exhaust steam with normal temperature water, heat the normal temperature water and condense the exhaust steam, and recover heat and condensed water.
It effectively solves the waste of exhaust heat, improves the working environment, and reduces the energy consumption of the boiler room, which has long-term economic benefits.
Smart Images
Figure CN119353670A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of energy recovery devices, in particular to an energy recovery device for a boiler periodic blowdown expansion container. Background Art
[0002] The drainage of the continuous blowdown expansion tank in some boiler rooms will be discharged into the periodic blowdown expansion tank with lower pressure, or some boiler rooms are only equipped with periodic blowdown expansion tanks, and the continuous sewage and periodic sewage of the boiler are discharged into the periodic blowdown expansion tank together, and the exhaust steam of the periodic blowdown expansion tank is often directly emptied, and the heat of this part of the steam is wasted, and it also affects the working environment of the boiler room. This not only affects the environment, but also increases the cost of the enterprise. Summary of the invention
[0003] The purpose of the present invention is to solve the technical problems raised in the above background technology.
[0004] The present invention adopts the following technical scheme: an energy recovery device for a boiler periodic blowdown expansion tank, comprising a boiler periodic blowdown expansion tank, a stop valve and a check valve, the top of the boiler periodic blowdown expansion tank is connected to an electric exhaust valve, one end of the electric exhaust valve is connected to a steam pressure transmitter, a check valve is installed between the electric exhaust valve and the steam pressure transmitter, one end of the steam pressure transmitter is connected to a steam-water mixing heater, the hot water outlet of the steam-water mixing heater is connected to a steam-water mixture separation device, the outlet of the gas-water mixture separation device is connected to a hot water booster pump, and the cold water inlet of the gas-water mixing heater is connected to a normal temperature water electric regulating valve.
[0005] Preferably, the number of the stop valves is three groups, one group of the stop valves is installed between the boiler periodic blowdown expansion tank and the electric exhaust valve, one group of the stop valves is installed between the steam-water mixing heater and the normal temperature water electric regulating valve, and one group of the stop valves is installed between the gas-water mixture separation device and the hot water booster pump.
[0006] Preferably, the number of the check valves is three groups, one group of the check valves is installed between the electric exhaust valve and the steam pressure transmitter, one group of the check valves is installed between the steam-water mixing heater and the normal temperature water electric regulating valve, and one group of the check valves is installed at the water outlet of the hot water booster pump.
[0007] Preferably, a steam flow meter is connected between the boiler periodic blowdown expansion tank and the normal temperature water electric regulating valve.
[0008] Preferably, the working pressure of the boiler periodic blowdown expansion tank is about 0.2 MPa, and the saturation temperature is about 133.5°C.
[0009] Preferably, the normal temperature water pressure at the cold water inlet of the steam-water mixing heater must be 0.05 MPa lower than the steam pressure.
[0010] Compared with the prior art, the advantages and positive effects of the present invention are:
[0011] In the present invention, by sequentially connecting the stop valve, steam flow meter, electric exhaust valve, boiler periodic blowdown expansion tank, check valve, steam pressure transmitter, steam-water mixing heater, normal temperature water electric regulating valve, gas-water mixture separation device, and hot water booster pump, a process flow of the energy recovery device of the boiler periodic blowdown expansion tank is formed. The core equipment, the steam-water mixing heater, mixes the exhaust steam of the periodic blowdown expansion tank with normal temperature water, heats the normal temperature water, and condenses the exhaust steam into water, that is, it absorbs the heat of the exhaust steam and recovers the condensed water. It solves the problem of exhaust steam waste of the periodic blowdown expansion tank, improves the working environment, reduces the overall energy consumption of the boiler room, and has huge long-term economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The present invention provides a schematic diagram of an energy recovery device for a boiler periodic blowdown expansion container.
[0013] Legend:
[0014] 1. Stop valve; 2. Steam flow meter; 3. Electric exhaust valve; 4. Boiler periodic blowdown expansion tank; 5. Check valve; 6. Steam pressure transmitter; 7. Steam-water mixing heater; 8. Normal temperature water electric regulating valve; 9. Gas-water mixture separation device; 10. Hot water booster pump. DETAILED DESCRIPTION
[0015] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.
[0017] Example
[0018] See also Figure 1The present invention provides a technical solution: an energy recovery device for a boiler periodic blowdown expansion tank, comprising a boiler periodic blowdown expansion tank 4, a stop valve 1 and a check valve 5, the top of the boiler periodic blowdown expansion tank 4 is connected with an electric exhaust valve 3, one end of the electric exhaust valve 3 is connected with a steam pressure transmitter 6, a check valve 5 is installed between the electric exhaust valve 3 and the steam pressure transmitter 6, one end of the steam pressure transmitter 6 is connected with a steam-water mixing heater 7, the hot water outlet of the steam-water mixing heater 7 is connected with a steam-water mixture separation device, the outlet of the gas-water mixture separation device 9 is connected with a hot water booster pump 10, and the cold water inlet of the gas-water mixing heater is connected with a normal temperature water electric regulating valve 8.
[0019] Furthermore, the number of stop valves 1 is three groups, one group of stop valves 1 is installed between the boiler periodic sewage expansion tank 4 and the electric exhaust valve 3, one group of stop valves 1 is installed between the steam-water mixing heater 7 and the normal temperature water electric regulating valve 8, and one group of stop valves 1 is installed between the gas-water mixture separation device 9 and the hot water booster pump 10.
[0020] Furthermore, there are three groups of check valves 5, one group of check valves 5 is installed between the electric exhaust valve 3 and the steam pressure transmitter 6, one group of check valves 5 is installed between the steam-water mixing heater 7 and the normal temperature water electric regulating valve 8, and one group of check valves 5 is installed at the water outlet of the hot water booster pump 10.
[0021] Furthermore, a steam flow meter 2 is connected between the boiler periodic blowdown expansion tank 4 and the normal temperature water electric regulating valve 8 .
[0022] Furthermore, the working pressure of the boiler periodic blowdown expansion tank 4 is about 0.2 MPa, and the saturation temperature is about 133.5°C.
[0023] Furthermore, the normal temperature water pressure at the cold water inlet of the steam-water mixing heater 7 must be lower than the steam pressure by 0.05 MPa.
[0024] Working principle: When the boiler room is operating normally, the working pressure of the boiler periodic blowdown expansion tank 4 is generally around 0.2MPa, and the saturation temperature under this pressure is around 133.5℃. This steam is connected to the steam inlet of the steam-water mixing heater 7. Normal temperature water is provided by the water treatment equipment and connected to the cold water inlet of the steam-water mixing heater 7. To ensure the normal operation of the steam-water mixing heater 7, the normal temperature water pressure must be lower than the steam pressure by 0.05MPa. After the normal temperature water flows through the steam-water mixing heater 7, it is mixed with the exhaust steam of the boiler periodic blowdown expansion tank 4. The water vapor is completely condensed into water, and the normal temperature water is heated. The non-condensable gas in the exhaust steam is sent to the gas-water mixture separation device 9 together with the heated water from the hot water outlet of the steam-water mixing heater 7. The separated non-condensable gas is automatically discharged through the discharge device, and the hot water is sent to the deaerator through the booster pump. Through this recovery device, the originally emptied steam heat and steam condensed water can be fully recovered, and the amount of heating steam required for the deaerator is also reduced, achieving the effect of energy saving and consumption reduction.
[0025] The normal temperature water electric regulating valve 8 receives the signal from the steam flow meter 2 and automatically adjusts the water flow according to the change of steam flow. The electric exhaust valve 3 receives the signal from the steam pressure transmitter 6 and automatically controls the opening and closing of the exhaust valve according to the pressure protection value to ensure the safe operation of the recovery system. The hot water booster pump 10 receives the water level signal from the gas-water mixture separation device 9 and automatically adjusts the flow of the water pump according to the water level to ensure that the water level is within the normal range.
[0026] The startup sequence of the boiler periodic blowdown expansion tank 4 energy recovery device is: first open the water side valve and water pump, then open the steam side valve. When stopping, first close the steam side valve, then close the water side valve and water pump.
[0027] The type of steam-water mixing heater 7 is determined according to the steam flow, steam pressure and water inlet pressure. The engineering and technical personnel can determine it by themselves according to the relevant standards.
[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. An energy recovery device for a boiler periodic blowdown expansion tank, comprising a boiler periodic blowdown expansion tank (4), a stop valve (1) and a check valve (5), characterized in that: The top end of the boiler periodic blowdown expansion tank (4) is connected to an electric steam exhaust valve (3), one end of the electric steam exhaust valve (3) is connected to a steam pressure transmitter (6), a check valve (5) is installed between the electric steam exhaust valve (3) and the steam pressure transmitter (6), one end of the steam pressure transmitter (6) is connected to a steam-water mixing heater (7), the hot water outlet of the steam-water mixing heater (7) is connected to a gas-water mixture separation device (9), the outlet of the gas-water mixture separation device (9) is connected to a hot water booster pump (10), and the cold water inlet of the steam-water mixing heater (7) is connected to a normal temperature water electric regulating valve (8).
2. The energy recovery device for the boiler periodic blowdown expansion tank according to claim 1 is characterized in that: The stop valves (1) are provided in three groups. One group of the stop valves (1) is installed between the boiler periodic blowdown expansion tank (4) and the electric exhaust valve (3). Another group of the stop valves (1) is installed between the steam-water mixing heater (7) and the normal temperature water electric regulating valve (8). Another group of the stop valves (1) is installed between the gas-water mixture separation device (9) and the hot water booster pump (10).
3. The energy recovery device for the boiler periodic blowdown expansion tank according to claim 1 is characterized in that: The number of the check valves (5) is three groups, one group of the check valves (5) is installed between the electric exhaust valve (3) and the steam pressure transmitter (6), one group of the check valves (5) is installed between the steam-water mixing heater (7) and the normal temperature water electric regulating valve (8), and one group of the check valves (5) is installed at the water outlet of the hot water booster pump (10).
4. The energy recovery device for the boiler periodic blowdown expansion tank according to claim 1 is characterized in that: A steam flow meter (2) is connected between the boiler periodic blowdown expansion tank (4) and the normal temperature water electric regulating valve (8).
5. The energy recovery device for the boiler periodic blowdown expansion tank according to claim 1 is characterized in that: The working pressure of the boiler periodic blowdown expansion tank (4) is about 0.2 MPa, and the saturation temperature is about 133.5°C.
6. The energy recovery device for the boiler periodic blowdown expansion tank according to claim 1 is characterized in that: The normal temperature water pressure at the cold water inlet of the steam-water mixing heater (7) must be 0.05 MPa lower than the steam pressure.