Energy recovery device of boiler periodic blowdown flash tank
By designing the energy recovery device for the regular discharge and expansion container of the boiler, and using the soda and water mixed heater to recover the heat and condensate of the exhaust steam, the problems of waste of exhaust steam and environmental impact are solved, and energy consumption is reduced and economic benefits are improved.
Patent Information
- Application Number
- CN202422115295.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-29
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 regular waste discharge and expansion container of boilers is designed. By connecting a stop valve, a steam flowmeter, an electric steam exhaust valve, a boiler regular waste discharge and expansion container, a check valve, a steam pressure transmitter, a steam and water mixing heater, a room temperature water electric regulating valve, a gas-water mixture separation device and a hot water booster pump, the steam and water mixing heat are mixed with a room temperature water, heat the room temperature water and condense the steam to recover heat and condensate.
It effectively solves the problem of waste heat of exhaust steam, improves the working environment, and reduces the energy consumption of the boiler room by recycling heat and condensate, bringing long-term economic benefits.
Smart Images
Figure CN223036381U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy recovery devices, in particular to an energy recovery device for the regular blowdown flash tank of a boiler. Background Art
[0002] The drainage of the continuous blowdown flash tank in some boiler rooms will be discharged into a regular blowdown flash tank with a lower pressure, or some boiler rooms are only equipped with a regular blowdown flash tank, and the continuous blowdown water and regular blowdown water of the boiler are discharged into the regular blowdown flash tank together. Moreover, the exhaust steam of the regular blowdown flash tank often directly vents to the atmosphere, and the heat of this part of the discharged steam is wasted, which also affects the working environment of the boiler room. This not only affects the environment but also increases the enterprise cost. Content of the Utility Model
[0003] The purpose of the utility model is to solve the technical problems put forward in the above background art.
[0004] The utility model adopts the following technical scheme: an energy recovery device for the regular blowdown flash tank of a boiler, including a regular blowdown flash tank of the boiler, a stop valve, and a check valve. The top end of the regular blowdown flash tank of the boiler is communicated with an electric exhaust valve. One end of the electric exhaust valve is communicated with 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 communicated with a steam-water mixing heater. The hot water outlet of the steam-water mixing heater is communicated with a steam-water mixture separation device. The outlet of the steam-water mixture separation device is communicated with a hot water booster pump. The cold water inlet of the steam-water mixing heater is communicated with a normal temperature water electric regulating valve.
[0005] Preferably, the number of the stop valves is three groups. One group of stop valves is installed between the regular blowdown flash tank of the boiler and the electric exhaust valve. One group of stop valves is installed between the steam-water mixing heater and the normal temperature water electric regulating valve. One group of stop valves is installed between the steam-water mixture separation device and the hot water booster pump.
[0006] Preferably, the number of the check valves is three groups. One group of check valves is installed between the electric exhaust valve and the steam pressure transmitter. One group of check valves is installed between the steam-water mixing heater and the normal temperature water electric regulating valve. One group of check valves is installed at the water outlet of the hot water booster pump.
[0007] Preferably, a steam flowmeter is communicated between the regular blowdown flash tank of the boiler and the normal temperature water electric regulating valve.
[0008] Preferably, the working pressure of the regular blowdown flash tank of the boiler 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 utility model are as follows:
[0011] In the present utility model, by sequentially connecting a stop valve, a steam flow meter, an electric exhaust valve, a boiler regular blowdown flash tank, a check valve, a steam pressure transmitter, a steam-water mixing heater, a normal temperature water electric control valve, a gas-water mixture separation device, and a hot water booster pump, the technological process of the energy recovery device of the boiler regular blowdown flash tank is formed. The core device, the steam-water mixing heater, mixes the exhaust steam of the regular blowdown flash tank with normal temperature water, heating the normal temperature water while condensing the exhaust steam into water, thus absorbing the heat of the exhaust steam and recovering the condensed water. It solves the problem of waste of exhaust steam from the regular blowdown flash tank, improves the working environment, reduces the overall energy consumption of the boiler house, and has huge long-term economic benefits. Brief Description of the Drawings
[0012] Figure 1 It is a schematic diagram of the energy recovery device of the boiler regular blowdown flash tank proposed by the present utility model.
[0013] Legend Explanation:
[0014] 1. Stop valve; 2. Steam flow meter; 3. Electric exhaust valve; 4. Boiler regular blowdown flash tank; 5. Check valve; 6. Steam pressure transmitter; 7. Steam-water mixing heater; 8. Normal temperature water electric control valve; 9. Gas-water mixture separation device; 10. Hot water booster pump. Detailed Embodiments
[0015] In order to more clearly understand the above-mentioned objects, features, and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
[0016] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.
[0017] Embodiment
[0018] Please refer to Figure 1, the utility model provides a technical solution: an energy recovery device for the regular blowdown expansion vessel of a boiler, which includes a regular blowdown expansion vessel 4 of the boiler, a stop valve 1 and a check valve 5. The top of the regular blowdown expansion vessel 4 of the boiler is connected to an electric exhaust valve 3. One end of the electric exhaust valve 3 is connected to 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 to a steam-water mixing heater 7. The hot water outlet of the steam-water mixing heater 7 is connected to a steam-water mixture separation device. The outlet of the gas-water mixture separation device 9 is connected to a hot water booster pump 10. The cold water inlet of the steam-water mixing heater is connected to a normal temperature water electric regulating valve 8.
[0019] Further, the number of stop valves 1 is three groups. One group of stop valves 1 is installed between the regular blowdown expansion vessel 4 of the boiler 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. One group of stop valves 1 is installed between the gas-water mixture separation device 9 and the hot water booster pump 10.
[0020] Further, the number of check valves 5 is three groups. 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. One group of check valves 5 is installed at the water outlet of the hot water booster pump 10.
[0021] Further, a steam flowmeter 2 is connected between the regular blowdown expansion vessel 4 of the boiler and the normal temperature water electric regulating valve 8.
[0022] Further, the working pressure of the regular blowdown expansion vessel 4 of the boiler is about 0.2 MPa, and the saturation temperature is about 133.5 °C.
[0023] Further, the pressure of the normal temperature water at the cold water inlet of the steam-water mixing heater 7 must be 0.05 MPa lower than the steam pressure.
[0024] Working principle: When the boiler room is operating normally, the working pressure of the boiler regular blowdown flash tank 4 is generally about 0.2 MPa, and the saturation temperature at this pressure is about 133.5 °C. This steam is connected to the steam inlet of the steam-water mixer 7. The normal temperature water is provided by the water treatment equipment and connected to the cold water inlet of the steam-water mixer 7. To ensure the normal operation of the steam-water mixer 7, the pressure of the normal temperature water must be 0.05 MPa lower than the steam pressure. After flowing through the steam-water mixer 7, the normal temperature water is mixed with the exhaust steam from the boiler regular blowdown flash tank 4, and all the water vapor is condensed into water, while the normal temperature water is heated. The non-condensable gas in the exhaust steam and the heated water are sent to the gas-water mixture separation device 9 together from the hot water outlet of the steam-water mixer 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 steam heat and steam condensate that were originally discharged can be fully recovered, and the amount of heating steam required by the deaerator is also reduced, achieving the effect of energy conservation and consumption reduction.
[0025] The normal temperature water electric control valve 8 receives the signal from the steam flowmeter 2 and automatically adjusts the feed water flow according to the change of the 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 size of 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 height to keep the water level within the normal range.
[0026] Startup sequence of the energy recovery device for the boiler regular blowdown flash tank 4: First, open the water side valves and the water pump, and then open the steam side valves. When stopping, first close the steam side valves, and then close the water side valves and the water pump.
[0027] The selection of the steam-water mixer 7 is determined according to the steam flow, steam pressure, and inlet water pressure. Engineering technicians can determine it by referring to relevant standards.
[0028] The above description is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall 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.