CN112815296A

CN112815296A - Drainage exhaust steam recovery system

Info

Publication number: CN112815296A
Application number: CN202110058550.9A
Authority: CN
Inventors: 王永亮
Original assignee: Ningbo Mingzhou Thermal Power Co ltd
Current assignee: Ningbo Mingzhou Thermal Power Co ltd
Priority date: 2021-01-16
Filing date: 2021-01-16
Publication date: 2021-05-18
Anticipated expiration: 2041-01-16
Also published as: CN112815296B

Abstract

The utility model relates to a hydrophobic exhaust steam recovery system, it includes hydrophobic flash vessel, drain box and oxygen-eliminating device, a plurality of water inlets have been seted up on the hydrophobic flash vessel, the water inlet of hydrophobic flash vessel connects respectively, the bottom of hydrophobic flash vessel is provided with the delivery port, the delivery port with the drain box is connected, the drain box is connected with the hydrophobic pump, the delivery port of hydrophobic pump is connected with the water inlet on the oxygen-eliminating device, the oxygen-eliminating device is connected with the oxygen-eliminating device heating steam female pipe that is used for carrying heating steam in to the oxygen-eliminating device. This application has the effect of promotion to the utilization ratio of hydrophobic inside heat energy.

Description

Drainage exhaust steam recovery system

Technical Field

The application relates to the technical field of condensate water returning to a boiler, in particular to a drainage exhaust steam recovery system.

Background

The prior drainage exhaust steam recovery system is a system for recovering drainage and exhaust steam.

The Chinese utility model with the authorized bulletin number of CN206439810U discloses a drainage flash vessel exhaust steam recovery system, which comprises a drainage flash vessel, a heater exhaust steam recovery device, a drain tank and a drain pump, wherein the drainage flash vessel is connected with a deaerator exhaust steam pipe, the heater exhaust steam recovery device is provided with a demineralized water inlet, an exhaust steam inlet and a hot water outlet, a mixing cavity is arranged in the heater exhaust steam recovery device, and the demineralized water inlet, the exhaust steam inlet and the hot water outlet are all communicated with the mixing cavity; the demineralized water inlet is connected with a main pipe of a low-temperature demineralized water pipe network through a nozzle, the exhaust steam inlet is connected with a steam exhaust pipe of a deaerator, the hot water outlet is connected with the inlet of a drain tank, the outlet of the drain tank is connected with the inlet of a drain pump, and the outlet of the drain pump is connected with a circulating water pipe network and a water replenishing pipe network; the top of the drainage box is provided with an air exhaust port.

However, in the actual use process of the above-mentioned steam exhaust recovery system of the drain flash tank, the drain tank is connected with the external circulation water pipe network and the water replenishing pipe network, and only the recovered drain water flow can be utilized, but the utilization of the heat energy carried by the water flow cannot be realized.

Disclosure of Invention

In order to promote the utilization ratio to hydrophobic inside heat energy, this application provides a hydrophobic exhaust steam recovery system.

The technical scheme provided by the application is as follows:

the utility model provides a hydrophobic exhaust steam recovery system, includes hydrophobic flash vessel, drain trap and oxygen-eliminating device, a plurality of water inlets have been seted up on the hydrophobic flash vessel, the water inlet of hydrophobic flash vessel is connected respectively, the bottom of hydrophobic flash vessel is provided with the delivery port, the delivery port with the drain trap is connected, the drain trap is connected with the hydrophobic pump, the delivery port of hydrophobic pump is connected with the water inlet on the oxygen-eliminating device, the oxygen-eliminating device is connected with the oxygen-eliminating device heating steam female pipe that is used for carrying heating steam in to the oxygen-eliminating device.

Through adopting above-mentioned technical scheme, after hydrophobic gathering and steam-water separation through hydrophobic flash vessel during the use, will gather the water delivery after and carry to the drain trap in, will be located the hydrophobic of trap one side and carry to the oxygen-eliminating device in afterwards for the temperature in the oxygen-eliminating device risees, thereby has reduced the required use amount of oxygen-eliminating device heating steam, has indirectly improved the efficiency of boiler.

Optionally, the drainage pump is provided with two sets ofly, the water inlet and the delivery port department of drainage pump all are connected with stop valve one, the drain box with the drainage pump is located and is close to one side of oxygen-eliminating device is provided with gate valve one.

Through adopting above-mentioned technical scheme, the connection condition between drain pump and the drain tank can be controlled according to the circumstances of reality, when the inside temperature of drain tank is lower or quality of water is relatively poor, then can close through the water route of a pair of drain pump of stop valve one and gate valve, and when needs are changed the drain pump, can directly will be located and can change the drain pump after the stop valve one of drain pump both sides directly closes to the installation of drain pump has been made things convenient for.

Optionally, the deoxidization on the oxygen-eliminating device drains female pipe and deoxidization overflow female pipe all are connected to on the hydrophobic flash tank.

Through adopting above-mentioned technical scheme, the unnecessary water that produces on the oxygen-eliminating device also directly carries to hydrophobic flash tank on to further promote whole hydrophobic recovery efficiency, further promoted hydrophobic utilization ratio.

Optionally, the lateral wall of the drain tank is provided with a drain return pipe connected with the drain pump in parallel, one end of the drain return pipe is communicated with a pipeline connected with the drain pump and the deaerator, the other end of the drain return pipe is connected with the drain tank, and the drain return pipe is provided with a second stop valve.

Through adopting above-mentioned technical scheme, set up the hydrophobic back flow parallelly connected with the drain pump in one side of drain tank, can retrieve through the hydrophobic back flow to the hydrophobic of not enough water pressure and carry again, promoted hydrophobic utilization ratio.

Optionally, a heating return pipe is arranged on the side wall of the drain tank, a drain heater is arranged on the heating return pipe, the drain heater comprises a magnetic induction coil which is sleeved on the outer side of the pipeline between the drain tank and the drain pump and a power supply for electrifying the magnetic induction coil, and a third stop valve is arranged on the heating return pipe.

Through adopting above-mentioned technical scheme, lateral wall at the drain box sets up the heating back flow, can heat the hydrophobic that is located the drain box, thereby make the temperature that enters into the oxygen-eliminating device through the drain pump from the drain box be higher than the inside rivers temperature of oxygen-eliminating device, thereby further promoted the rivers temperature in the oxygen-eliminating device, reduced the required use amount of oxygen-eliminating device heating steam, when having improved boiler efficiency indirectly, reduced the consumption of heating steam, practiced thrift the energy.

Optionally, the lateral wall of the drainage flash tank is further provided with a steam return pipe, the steam return pipe is communicated with a pipeline on the deaerator heating steam main pipe, and the steam return pipe is provided with a second gate valve.

Through adopting above-mentioned technical scheme, set up the steam back flow at the lateral wall of hydrophobic flash tank to make the hydrophobic in each pipeline after hydrophobic flash tank, after separating between the steam in the pipeline and the hydrophobic, high temperature low pressure steam enters into the steam back flow intraductally, and the steam back flow communicates with the female pipe of heating steam, thereby has promoted the utilization ratio to the heat energy on the steam, has further practiced thrift the energy.

Optionally, still be provided with on the steam return pipe and pass through water heater's steam backflow branch pipe, steam backflow branch pipe also is connected to the female pipe of oxygen-eliminating device heating steam, be provided with gate valve three on the steam backflow branch pipe.

Through adopting above-mentioned technical scheme, through setting up the steam backflow branch pipe, it is lower as ambient temperature, when leading to steam can't reach required temperature at the in-process of carrying, pass through the steam backflow branch pipe and transmit steam to the steam backflow branch pipe from the steam return pipe, and heat the steam in the steam backflow branch pipe through hydrophobic heater, steam after the heating reenters in the deaerator heating steam mother pipe, thereby reduced because the heat of steam does not enough influence the probability of the deoxidization efficiency of deaerator.

Optionally, the steam reflux branch pipe is connected to the bottom of the steam trap, and a heating steam pipe connected with a deaerator heating steam main pipe is arranged at the top of the steam trap.

Through adopting above-mentioned technical scheme, be connected to the bottom of drain tank with the steam return pipe, thereby make steam in the steam recovery branch can pass through the drain tank, and when high-temperature gas passes through the hydrophobic of the inside of drain tank, can realize the hydrophobic heating to the inside of drain tank, thereby further promoted the inside temperature of drain tank, and through utilizing steam to hydrophobic heating, make some steam in the steam directly condense and mix in hydrophobic, and other hydrophobic gases of process then get into and lie in the drain tank top, hydrophobic utilization ratio has been increased.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the drain pump, the drain in the drain tank can be conveyed into the deaerator, and the heat of the drain in the drain tank is recycled, so that the utilization rate of the heat energy in the drain tank is improved;

the steam return pipe is arranged, so that steam in the drainage can be recycled, and the utilization rate of the drainage is further improved;

through setting up steam backflow branch pipe, can reheat the steam in hydrophobic to hydrophobic utilization ratio has further been promoted.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present application.

Fig. 2 is a schematic view of the overall structure of embodiment 2 of the present application.

Reference number legend, 1, a hydrophobic flash tank; 12. a steam return pipe; 121. a second gate valve; 13. a steam reflux branch pipe; 131. a gate valve III; 14. heating a steam pipe; 141. a gate valve IV; 2. a drain tank; 21. a water outlet pipe; 22. a delivery pipe; 23. a water supply pipe; 231. a first gate valve; 24. a drain pump; 241. a first stop valve; 242. a check valve; 25. a drain return pipe; 251. a second stop valve; 26. heating a reflux pipe; 261. a third stop valve; 27. a hydrophobic heater; 271. a magnetic induction coil; 272. a power source; 3. a deaerator; 4. a drain pipe group; 41. a deoxygenated overflow main pipe; 42. supplying water by dissolving water; 43. deoxidizing and dewatering; 44. dewatering water; 45. high pressure, often hydrophobic; 46. performing secondary low-pressure hydrophobic treatment on the biomass; 47. performing secondary high-pressure dewatering on the biomass; 48. draining water by a boiler SCR; 5. the deaerator heats the steam main pipe.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

In the case of the example 1, the following examples are given,

a drainage dead steam recovery system, referring to fig. 1, comprises a drainage flash tank 1, a drainage tank 2 and a deaerator 3.

A plurality of water inlets are formed in the hydrophobic flash tank 1, the water inlets on the hydrophobic flash tank 1 are respectively connected with a plurality of external hydrophobic pipe groups 4, and each hydrophobic pipe group 4 comprises a deoxygenation overflow main pipe 41, a deoxygenation drain main pipe, chemical water supply incoming water 42, a deoxygenation hydrophobic pipe 43, hydrophobic water supply 44, high-pressure frequent hydrophobic pipe 45, biomass second-stage low-pressure hydrophobic pipe 46, biomass second-stage high-pressure hydrophobic pipe 47 and boiler SCR hydrophobic pipe 48. The drain pipe groups 4 are connected with the drain flash tank 1, and regulating valves are arranged between the drain pipe groups and the drain flash tank 1. The oxygen-removing overflow mother pipe 41 and the oxygen-removing drain mother pipe are the same pipe.

After the hydrophobic water passes through the hydrophobic flash tank 1, the liquid and the gas in the hydrophobic water are separated, and the liquid enters the hydrophobic tank 2 at the bottom of the hydrophobic flash tank 1. One side of the drain tank 2 is provided with a water outlet pipe 21, two conveying pipes 22 are connected in parallel on the water outlet pipe 21, the water outlets of the two conveying pipes 22 are connected with a water supply pipe 23, the water supply pipe 23 is connected with the deaerator 3, and a first gate valve 231 is arranged on the water supply pipe 23.

Each delivery pipe 22 is connected with a drain pump 24, a first stop valve 241 is arranged at the water inlet and the water outlet of the drain pump 24, and a check valve 242 is arranged at the water outlet of the drain pump 24 to prevent water on the delivery pipe 22 from flowing backwards when the drain pump 24 does not work.

The water supply pipe 23 and the drain tank 2 are also provided with a drain return pipe 25, the water inlet of the drain return pipe 25 is communicated with the water supply pipe 23, the water outlet of the drain return pipe 25 is communicated with the drain tank 2, and the drain return pipe 25 is also provided with a second stop valve 251.

One side that hydrophobic case 2 is relative with hydrophobic back flow pipe 25 is provided with a heating back flow pipe 26, be provided with three stop valves 261 on the heating back flow pipe 26, the outside of heating back flow pipe 26 is provided with a hydrophobic heater 27, hydrophobic heater 27 includes magnetic induction coil 271 and power 272, the heating back flow outside of managing is located to the magnetic induction coil 271 cover, power 272 and magnetic induction coil 271 intercommunication, heating back flow pipe 26 adopts magnetic material to make, for example, the iron pipe, make magnetic induction coil 271 realize the heating to heating back flow pipe 26, make the hydrophobic temperature through heating back flow pipe 26 rise, thereby make the inside hydrophobic temperature of hydrophobic case 2 rise.

The lateral wall of hydrophobic flash vessel 1 is connected with steam return pipe 12, and the other end of steam return pipe 12 is connected with the female pipe 5 of oxygen-eliminating device heating steam on the oxygen-eliminating device 3 for steam in hydrophobic flash vessel 1 can play the heating effect to 3 inside rivers of oxygen-eliminating device. The steam return pipe 12 is provided with a second gate valve 121.

In the case of the example 2, the following examples are given,

a drainage exhaust steam recovery system is different from that of embodiment 1 in that referring to fig. 2, a steam backflow branch pipe 13 is arranged at the bottom of a steam backflow pipe 12, a gate valve III 131 is arranged on the steam backflow branch pipe 13, an air inlet of the steam backflow branch pipe 13 is connected with one air outlet of the steam backflow pipe 12, an air outlet of the steam backflow branch pipe 13 is connected to the bottom of a drainage box 2, and a heating steam pipe 14 connected with a deaerator heating steam main pipe 5 is arranged at the top of the drainage box 2. The heating steam pipe 14 is provided with a gate valve iv 141. In this embodiment, the steam return branch pipe 13 is also made of a magnetic material.

When the temperature of the steam in the steam return pipe 12 is high, the gate valve III 131 is closed, and the steam directly enters the deaerator 3 only through the steam return pipe 12, so that the water flow in the deaerator 3 is heated; when the temperature of the steam in the steam return pipe 12 is low, the second gate valve 121 is closed, and the third gate valve 131 is opened, so that the steam enters the drain heater 27 after passing through the steam return branch pipe 13, and the steam in the steam return branch pipe 13 is heated, so that the steam in the steam return branch pipe 13 can have a high temperature.

The implementation principle of the hydrophobic exhaust steam recovery system of the embodiment is as follows: during the use, after hydrophobic is collected and steam-water separation is carried out through hydrophobic flash tank 1, will collect the water delivery after carry to drain trap 2 in, will be located drain trap 2 hydrophobic transport to oxygen-eliminating device 3 through the hydrophobic pump 24 that is located drain trap 2 one side afterwards for the temperature in the oxygen-eliminating device 3 risees, thereby has reduced the required use amount of oxygen-eliminating device 3 heating steam, has indirectly improved the efficiency of boiler.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A drainage exhaust steam recovery system is characterized in that: including hydrophobic flash vessel (1), hydrophobic case (2) and oxygen-eliminating device (3), a plurality of water inlets have been seted up on hydrophobic flash vessel (1), the water inlet of hydrophobic flash vessel (1) is connected respectively, the bottom of hydrophobic flash vessel (1) is provided with the delivery port, the delivery port with hydrophobic case (2) are connected, hydrophobic case (2) are connected with hydrophobic pump (24), the delivery port of hydrophobic pump (24) is connected with the water inlet on oxygen-eliminating device (3), oxygen-eliminating device (3) are connected with oxygen-eliminating device heating steam female pipe (5) that are used for carrying heating steam in oxygen-eliminating device (3).

2. The hydrophobic exhaust steam recovery system according to claim 1, wherein: the utility model discloses a steam trap, including drain pump (24), drain pump (24) are provided with two sets ofly, the water inlet and the delivery port department of drain pump (24) all are connected with stop valve (241), drain box (2) with drain pump (24) are located and are close to one side of oxygen-eliminating device (3) is provided with gate valve (231).

3. The hydrophobic exhaust steam recovery system according to claim 2, wherein: and a deoxygenation water drain main pipe on the deoxygenator (3) and a deoxygenation water overflow main pipe (41) are connected to the drainage flash tank (1).

4. The hydrophobic exhaust steam recovery system according to claim 3, wherein: the lateral wall of drain tank (2) be provided with drain return pipe (25) that drain pump (24) are parallelly connected, the one end of drain return pipe (25) with connect drain pump (24) and the pipeline intercommunication of oxygen-eliminating device (3), the other end of drain return pipe (25) with drain tank (2) are connected, be provided with stop valve two (251) on drain return pipe (25).

5. The hydrophobic exhaust steam recovery system according to claim 1, wherein: the lateral wall of drain tank (2) is provided with heating back flow (26), be provided with hydrophobic heater (27) on heating back flow (26), hydrophobic heater (27) are including the magnetic induction coil (271) of the pipe outside of cover locating between drain tank (2) and drain pump (24) and carry out the power (272) that circular telegram to magnetic induction coil (271), be provided with stop valve three (261) on heating back flow (26).

6. The hydrophobic exhaust steam recovery system according to claim 5, wherein: the lateral wall of hydrophobic flash vessel (1) still is provided with steam return pipe (12), pipeline intercommunication on steam return pipe (12) and the female pipe of oxygen-eliminating device heating steam (5), be provided with gate valve two (121) on steam return pipe (12).

7. The hydrophobic exhaust steam recovery system according to claim 6, wherein: still be provided with on steam backflow pipe (12) and pass through steam backflow branch pipe (13) of hydrophobic heater, steam backflow branch pipe (13) also are connected to the female pipe of oxygen-eliminating device heating steam (5), be provided with gate valve three (131) on steam backflow branch pipe (13).

8. The hydrophobic exhaust steam recovery system according to claim 7, wherein: the steam reflux branch pipe (13) is connected to the bottom of the steam trap (2), and a heating steam pipe (14) connected with the deaerator heating steam main pipe (5) is arranged at the top of the steam trap (2).