Condensate water recovery device for heating station

Abstract

In order to solve the problem of loss in the condensate water recovery process of the heating station, the utility model provides a condensate water recovery device of the heating station, which comprises an auxiliary steam header, an inlet of the heat exchanger is connected with the auxiliary steam header through a steam connecting pipeline; an outlet of the heat exchanger is connected with the condensate water collecting tank, a water outlet of the condensate water collecting tank is connected with a heating system through a water outlet pipe, and the water outlet of the condensate water collecting tank is further connected with a condensate water recycling water pump; an inlet of the auxiliary steam flash tank is connected with the water outlet pipe through a first pipeline, the bottom of the auxiliary steam flash tank is sequentially connected with a water seal cylinder and a condenser through a drain pipe, and the heating system is matched with the auxiliary steam flash tank, the water seal cylinder and the condenser which are sequentially connected, so that condensate water in the condensate water collecting tank can be completely recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of condensate recovery, in particular to a condensate recovery device for a heating station. Background Art

[0002] The heat exchanger in a heating station generally adopts a surface heater, which uses steam to heat the heating circulating water. The condensate formed after the steam condenses has high quality and high water production cost, and has high recovery value. Setting up a recovery device has become an important recovery way, but due to different system settings, the recovery effects vary greatly.

[0003] Traditional condensate recovery process in a heating station: Steam enters the heat exchanger in the heating station through a steam connection pipe from the auxiliary steam header, is heat-exchanged and condensed into water, and then is introduced into the condensate collection tank depending on the pressure on the steam side of the heat exchanger, and then is input into the heating system through a condensate recovery water pump to supplement the circulating water pressure of the heating system. The excess condensate enters the trench through an overflow pipeline.

[0004] In the traditional condensate recovery method for a heating station, the degree of automatic recovery and utilization of condensate is low. The condensate recovery water pump needs to be started for water replenishment according to the decrease in the circulating water pressure of the heating system, and it is impossible to completely recover the condensate in the condensate collection tank. A part of the condensate will enter the trench through the overflow pipeline, resulting in a certain amount of steam-water loss and poor economy. Content of the Utility Model

[0005] In order to solve the problem of losses in the process of condensate recovery in a heating station, the utility model provides a condensate recovery device for a heating station, and the technical scheme adopted is as follows:

[0006] A condensate recovery device for a heating station, characterized by comprising:

[0007] An auxiliary steam header;

[0008] A heat exchanger, the inlet of which is connected to the auxiliary steam header through a steam connection pipe;

[0009] A condensate collection tank, the outlet of the heat exchanger is connected to the condensate collection tank, the water outlet of the condensate collection tank is connected to the heating system through a water outlet pipe, and a condensate recovery water pump is also connected at the water outlet of the condensate collection tank;

[0010] An auxiliary steam expander, the inlet of which is connected to the water outlet pipe through a first pipe, and the bottom is sequentially connected with a water seal cylinder and a condenser through a drain pipe.

[0011] Further, an overflow pipe is connected to the upper part of the condensate collection tank, and the overflow pipe is connected to an overflow tank.

[0012] Further, a first switching valve and a second switching valve are respectively arranged at the steam connection pipe and the outlet of the heat exchanger.

[0013] Further, an overflow valve is provided on the overflow pipe.

[0014] Further, a third on-off valve is provided on the first pipe.

[0015] Further, a drain regulating valve is provided at the drain outlet of the auxiliary steam desuperheater.

[0016] Further, a control system is further included. The control system consists of a controller and a liquid level sensor. The liquid level sensor is arranged in the condensate collection tank. The liquid level sensor and the condensate recovery pump are respectively connected to the signal input end and the signal output end of the controller. And upper and lower limit values of the condensate liquid level for respectively controlling the start and stop of the condensate recovery pump are preset in the controller.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The heating system is cooperated with the auxiliary steam desuperheater, the water seal cylinder and the condenser which are connected in sequence, and the condensate in the condensate collection tank can be completely recovered.

[0019] 2. The water level of the auxiliary steam desuperheater is controlled by the drain regulating valve to prevent air from entering the water seal cylinder and the condenser after the auxiliary steam desuperheater runs out of water. And by arranging the water seal cylinder, it plays a role of automatically sealing and isolating air and reducing the condensate pressure at the same time. The two cooperate to jointly prevent the condenser vacuum from leaking.

[0020] 3. A liquid level sensor is arranged in the condensate collection tank, and upper and lower limit values of the condensate liquid level are preset in the controller. When the controller receives the liquid level signal detected by the liquid level sensor and the liquid level is lower than the lower limit value, the controller controls the condensate recovery pump to stop working, avoiding the situation that the condensate recovery water pump still runs and is damaged when the condensate collection tank is out of water. When the controller receives the liquid level signal detected by the liquid level sensor and the liquid level is higher than the upper limit value, the controller controls the condensate recovery pump to work. A part of the condensate is automatically input into the heating system, and the remaining part enters the auxiliary steam desuperheater for further steam-water separation, and enters the condenser after the pressure is reduced by the water seal cylinder for all recycling, avoiding the waste caused by the overflow of the full water in the condensate collection tank, so as to achieve the purpose of maintaining the stable water level of the condensate collection tank, without overflow and without water shortage.

[0021] 4. The automation degree is high, the automatic interlock start and stop of the condensate recovery water pump are realized throughout the process, and no operation personnel intervention is required during the operation, and the energy-saving effect is remarkable. Description of the Drawings

[0022] Figure 1 It is a structural schematic diagram of the utility model

[0023] Among them, 1 - auxiliary steam header, 2 - steam connection pipe, 3 - heating station heat exchanger, 4 - water inlet pipe, 5 - condensate collection tank, 6 - overflow pipe, 7 - overflow tank, 8 - water outlet pipe, 9 - condensate recovery pump, 10 - heating system, 11 - first pipeline, 12 - auxiliary steam expander, 13 - drain pipe, 14 - drain regulating valve, 15 - water seal drum, 16 - condenser, 17 - first on-off valve, 18 - second on-off valve, 19 - overflow valve, 20 - third on-off valve, 21 - controller, 22 - liquid level sensor. Detailed implementation manners

[0024] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0025] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the view direction or positional relationship, and is only for the convenience of describing the utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the utility model.

[0026] As Figure 1 shown, a condensate recovery device for a heating station includes an auxiliary steam header 1, a heating station heat exchanger 3, and a condensate collection tank 5 connected in sequence. The water outlet pipe 8 of the condensate collection tank 5 is connected in parallel with a heating system 10 and an auxiliary steam expander 12.

[0027] Specifically, the auxiliary steam header 1 is connected to the heating station heat exchanger 3 through a steam connection pipe 2. A first on-off valve 17 is provided on the steam connection pipe 2. The heating station heat exchanger 3 is connected to the water inlet of the upper part of the condensate collection tank 5 through a water inlet pipe 4. A second on-off valve 18 is provided at the outlet of the heating station heat exchanger 3. An overflow pipe 6 is also connected to the upper part of the condensate collection tank 5. The overflow pipe 6 is connected to an overflow tank 7, and an overflow valve 19 is provided on the overflow pipe 6.

[0028] A drain pipe 8 is connected to the lower part of the condensate collection tank 5. A condensate recovery pump 9 is provided on the drain pipe 8. The heating system 10 and the auxiliary steam flash tank 12 are connected in parallel to the drain pipe 8. Among them, the inlet of the auxiliary steam flash tank 12 is connected to the drain pipe 8 through the first pipe 11. A third on-off valve 20 is provided on the first pipe 11. The bottom drain of the auxiliary steam flash tank 12 is sequentially connected to a water seal cylinder 15 and a condenser 16 through a drain pipe 13. A drain regulating valve 14 is provided on the drain pipe 13 near one end of the bottom drain of the auxiliary steam flash tank 12. The drain regulating valve 14 is connected to the inlet of the water seal cylinder 15 through a pipe. The outlet of the water seal cylinder 15 is connected to the drain inlet of the condenser 16 through a pipe. A drain regulating valve 14 is provided at the bottom of the auxiliary steam flash tank 12, which can automatically adjust the water level to be stable, prevent air from entering the water seal cylinder and the condenser after the auxiliary steam flash tank 12 runs out of water, and avoid affecting the safe operation of the condenser. A water seal cylinder 15 is provided after the drain regulating valve 14, which plays a role of automatically sealing and isolating air and reducing the condensate pressure at the same time.

[0029] In addition, in this embodiment, a control system is further included, including a controller 21 and a liquid level sensor 22. The liquid level sensor 22 is arranged inside the condensate collection tank 5 for detecting the internal liquid level. The condensate recovery pump 9 and the liquid level sensor 22 are respectively connected to the signal output end and the signal input end of the controller 21. The controller 21 is preset with a liquid level upper limit value and a lower limit value. The controller 21 receives the liquid level height signal detected by the liquid level sensor 22. When the detected liquid level height is greater than the liquid level upper limit value, the controller 21 controls the condensate recovery pump 9 to work, so as to pump a part of the condensate inside the condensate collection tank 5 into the auxiliary steam flash tank 12, realizing the full recovery of the condensate and avoiding the waste of water overflow when the condensate collection tank 5 is full. When the detected liquid level height is less than the liquid level upper limit value, the controller 21 controls the condensate recovery pump 9 to stop working, avoiding the situation that the condensate recovery water pump 9 still runs and is damaged when there is no water in the condensate collection tank 5.

[0030] The working principle of this device is as follows:

[0031] After the steam enters the heating station heat exchanger 3 from the auxiliary steam header 1 through the steam connection pipe 2 for heat exchange and condensation into water, it is introduced into the condensate collection tank 5 by relying on the steam side pressure of the heating station heat exchanger 3. The start and stop actions of the condensate recovery pump 9 are automatically controlled through the set control system. A part of the condensate enters the heating system, and the remaining part of the condensate enters the auxiliary steam flash tank 12 for further steam-water separation. The water level of the auxiliary steam flash tank 12 is automatically adjusted by the drain regulating valve 14 to be stable, preventing air from entering the water seal cylinder 15 and the condenser 16 after the auxiliary steam flash tank 12 runs out of water, so as to avoid affecting the safe operation of the condenser 16, and then enters the condenser 16 through the water seal cylinder 15 after pressure reduction for full recovery and utilization.

[0032] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be regarded as the protection scope of the present utility model.

Claims

1. A condensate recovery device for a heating station, characterized in that, Including: Auxiliary steam header; Heat exchanger, the inlet of which is connected to the auxiliary steam header through a steam connection pipeline; Condensate collection tank, the outlet of the heat exchanger is connected to the condensate collection tank, the water outlet of the condensate collection tank is connected to the heating system through a water outlet pipe, and a condensate recovery pump is also connected to the water outlet of the condensate collection tank; Auxiliary steam flash tank, the inlet of which is connected to the water outlet pipe through a first pipeline, and the bottom is sequentially connected to a water seal drum and a condenser through a drain pipe.

2. The condensate recovery device for a heating station according to claim 1, characterized in that, An overflow pipe is connected to the upper part of the condensate collection tank, and the overflow pipe is connected to an overflow tank.

3. A condensate recovery device for a heating station according to claim 1, characterized in that, A first switch valve and a second switch valve are respectively arranged at the steam connection pipeline and the outlet of the heat exchanger.

4. The condensate recovery device for a heating station according to claim 2, characterized in that, An overflow valve is arranged on the overflow pipe.

5. A condensate recovery device for a heating station according to claim 1, characterized in that, A third switch valve is arranged on the first pipeline.

6. The condensate recovery device for a heating station according to claim 1, characterized in that, A drain regulating valve is arranged at the drain outlet of the auxiliary steam flash tank.

7. The condensate recovery device for a heating station according to claim 1, characterized in that, It also includes a control system, which consists of a controller and a liquid level sensor. The liquid level sensor is arranged in the condensate collection tank. The liquid level sensor and the condensate recovery pump are respectively connected to the signal input end and the signal output end of the controller, and the upper limit value and the lower limit value of the condensate liquid level for respectively controlling the start and stop of the condensate recovery pump are preset in the controller.

Images