CN219159036U - Heat supply steam extraction pipeline energy recovery system of thermal power plant - Google Patents

Abstract

The utility model provides an energy recovery system of a heat supply and steam extraction pipeline of a thermal power plant, and belongs to the technical field of waste heat recovery of thermal power plants; including the drainage subassembly that sets up on heating steam extraction check valve front pipe way, still communicate there is low pressure heater on the drainage subassembly, low pressure heater includes the heater casing, still be equipped with the spiral guide plate that is used for water conservancy diversion steam in the heater casing, be equipped with the valve subassembly that is used for controlling the rivers velocity of flow in the cold water pipe, the valve subassembly is including the cover a plurality of valve plates of establishing on the control rod, the circulation hole that the aperture is different has been seted up respectively on a plurality of valve plates, still be equipped with the gasbag that is used for controlling the control rod to go up and down on the steam input pipe, be equipped with hydrogen peroxide in the gasbag, still be equipped with the trigger subassembly that is used for controlling gasbag inflation on the steam input pipe, trigger subassembly includes the metal conducting strip, the metal conducting strip is used for the steam heat conduction to the gasbag in the steam input pipe. The utility model solves the problems of low energy utilization efficiency and the like of the heat supply and steam extraction pipeline of the traditional thermal power plant by arranging the spiral guide plates and the like.

Description

Heat supply steam extraction pipeline energy recovery system of thermal power plant

Technical Field

The utility model relates to the technical field of waste heat recovery of thermal power plants, in particular to an energy recovery system of a heat supply and steam extraction pipeline of a thermal power plant.

Background

The heat supply steam extraction transformation becomes an important mode for improving the energy utilization rate of the unit, and the steam exhaust of the medium-pressure cylinder is divided into two paths through the simple transformation of the unit: one path enters the low-pressure cylinder through the communicating pipe regulating valve to continuously apply work, and the other path enters the heat supply and steam extraction main pipe of the steam turbine room through the heat supply and steam extraction check valve, the heat supply and steam extraction regulating valve and the heat supply and steam extraction electric stop valve to supply heat to the heat supply first station.

The unit operates in a pure condensation mode in non-heat supply season, namely, a communicating pipe regulating valve is fully opened, a heat supply and steam extraction check valve, a heat supply and steam extraction regulating valve and a heat supply and steam extraction electric stop valve are fully closed, and all medium pressure cylinder exhaust steam enters a low pressure cylinder to do work. The unit operates in a combined mode of steam extraction and condensation in a heating season, namely, the full-open heating steam extraction check valve and the heating steam extraction electric stop valve, and the steam extraction amount and the steam discharge amount are regulated in a combined mode by the communicating pipe regulating valve and the heating steam extraction regulating valve according to the thermoelectric load distribution condition.

In order to ensure the operation safety of the unit, no ponding exists in a pipeline between the exhaust of the medium pressure cylinder and the heat supply steam extraction check valve, flowing steam exists in a pipeline during heat supply, the situation of ponding generally cannot occur, the flowing steam does not exist in the heat supply pipeline during non-heat supply, the water accumulation is easy to occur in the pipeline, and at present, all the modified steam turbines must be provided with drainage on the pipeline before the heat supply steam extraction check valve so as to ensure that no ponding exists in the heat supply pipeline.

There are two modes in the current design of the drainage in front of the steam extraction check valve, one is to discharge the drainage system to recycle to the condenser, so that the working medium is recycled, and the other is to simply discharge the working medium into the trench.

The drainage is discharged into the condenser before the current extraction check valve and is wasted, the waste of working medium and energy is caused by discharging the drainage into a trench, because the annual heating period is only about 4 months, the drainage is required to be continuous and continuous in order to ensure the operation safety of a unit in the period of 8 months, and the loss of energy is very large comprehensively.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an energy recovery system of a heat-engine plant heat supply steam extraction pipeline, so as to solve the problems of low energy utilization efficiency and the like of the existing heat-engine plant heat supply steam extraction pipeline.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a heat supply steam extraction pipeline energy recovery system of thermal power plant, including the low pressure jar that is linked together with the intermediate pressure jar steam extraction end through communicating pipe governing valve, and through heat supply steam extraction check valve, heat supply steam extraction governing valve, heat supply steam extraction electric stop valve get into the steam engine room heat supply steam extraction main pipe after send to the heat supply head station heat supply, and with the another branch circuit that intermediate pressure jar steam extraction end linked together, and the drainage subassembly that sets up on heat supply steam extraction check valve foreline, this drainage subassembly is used for preventing ponding in the heating pipeline and contains the drainage pipeline, still communicate on the drainage subassembly has low pressure heater, the low pressure heater includes the heater casing, a plurality of cold water pipes are installed on the heater casing, the one end of heater casing is inwards imported steam through the steam input pipe, and to a plurality of cold water pipe heating, still be equipped with the spiral guide plate that is used for water conservancy diversion steam in the heater casing;

the cold water pipe is internally provided with a valve assembly for controlling the flow speed of water flow, the valve assembly comprises a plurality of valve plates sleeved on a control rod, the valve plates are respectively provided with a circulation hole with different pore diameters, and the pore diameter of the circulation hole at the highest position is sequentially increased from top to bottom;

the both ends of heater casing all are connected with front end sealed lid and end seal lid respectively through the ring flange, the one end internal diameter of steam input pipe is less than the internal diameter size of heater casing, the steam input pipe is installed the one end of front end sealed lid, just the other end of steam input pipe with the drainage pipeline is linked together.

Preferably, the steam input pipe is further provided with an air bag for controlling the control rod to lift, hydrogen peroxide is arranged in the air bag, the steam input pipe is further provided with a triggering component for controlling the expansion of the air bag, the triggering component comprises a plurality of metal heat conducting fins inserted on the steam input pipe, and the metal heat conducting fins are used for conducting steam heat in the steam input pipe to the air bag.

Preferably, the cold water pipes are all arranged on the heater shell in a circumferential array by taking the axis of the heater shell as a shaft, the cold water pipes are used for conveying cold water, and the input ends of the cold water pipes are all communicated with straight pipes.

Preferably, the spiral guide plate is sleeved on the inner wall of the heater shell, and the center of the spiral guide plate is also sleeved with a guide column coaxial with the spiral guide plate.

Preferably, the two ends of the flow guiding column are respectively matched with the front end sealing cover and the tail end sealing cover, the two ends of the flow guiding column are respectively provided with a round corner, and after the steam is input into the heater shell through the steam input pipe, the steam can flow along the path of the spiral flow guiding plate under the flow guiding of the flow guiding column and the spiral flow guiding plate until the steam is discharged out of the heater shell.

Preferably, the plurality of straight pipes are respectively provided with a flow velocity adjusting pipe communicated with the corresponding straight pipe, and the inner diameter of the flow velocity adjusting pipe is larger than the inner diameter of the straight pipe.

Preferably, the control rods are respectively sleeved in the corresponding straight pipes in a sliding manner, and the valve plates at the same relative position are fixedly sleeved at one ends of the corresponding control rods and are consistent with the inner diameter of the corresponding straight pipes.

Preferably, the bottom of control rod is all fixedly connected with arc piece, still install the fixed disk on the one end outer wall of straight tube, the control rod slip cap is established corresponding on the fixed disk, a plurality of arc piece all with the outer wall of gasbag is laminated mutually.

Preferably, a plurality of control rods are respectively sleeved with springs, and two ends of each spring are respectively connected to the corresponding fixed disc and the corresponding arc-shaped block.

Preferably, one end of each of the plurality of metal heat conducting fins, which is located outside the steam input pipe, is connected with the same heat conducting metal ring, a plurality of hoops which are uniformly distributed are arranged on the heat conducting metal ring, and the air bags are sleeved in the hoops.

Compared with the prior art, the utility model has at least the following beneficial effects:

according to the scheme, through analyzing the equipment parameters, the optimal recovery is selected as the low-pressure heater, the low-pressure heater heats condensed water by adopting medium-pressure cylinder exhaust steam, the steam extraction parameters are consistent with heat supply steam extraction, the maximum recovery of energy can be realized, the device is specifically designed to increase a bypass leading to a steam supply pipeline of the low-pressure heater on the basis of original drainage, pre-heating steam in front of a steam extraction check valve is directly discharged into the low-pressure heater under the normal operation condition to realize the pre-heating of the steam supply pipeline and the recovery of energy, when heat cannot be recovered to the low-pressure heater, drainage is discharged into a condenser, the pipeline pre-heating and the unit operation safety are guaranteed, and according to the condition that the drainage energy cannot be recovered, the device adopts a brand new design, and under the premise that the drainage energy is recovered, the full pre-heating of the pipeline in front of the steam extraction check valve is guaranteed, and the operation safety of the unit is guaranteed.

When cold water in the cold water pipe is heated through hydrophobic energy, after steam is guided into the heater shell by the steam input pipe, the steam is dispersed all around under the effect of the round angle on the guide post, and then high-temperature steam flows along the spiral path of the spiral guide plate and flows towards the end sealing cover along the spiral path of the spiral guide plate, so that the retention time of the steam in the low-pressure heater is prolonged, the steam is fully contacted with a plurality of cold water pipes for heat exchange, and the heat exchange efficiency of the steam is improved.

After steam is introduced into the heater shell through the steam input pipe, the steam is preferentially contacted with the plurality of metal heat conducting fins, partial steam heat is conducted to the heat conducting metal ring through the plurality of metal heat conducting fins, the collected heat is conducted to the air bag through the heat conducting metal ring, further, the hydrogen peroxide in the air bag is promoted to be heated and decomposed into oxygen, the expansion of the air bag is promoted, further, under the guiding effect of the straight pipe, one ends of the plurality of control rods are mutually far away, the springs are compressed and deformed, the control rods move in the corresponding straight pipe, valve plates at corresponding heights enter the flow speed adjusting pipe, and due to different pore diameters of circulation holes at the same relative position, the flow speed of cold water in the straight pipe can be correspondingly adjusted through the valve plates in the straight pipe, so that the flow speed of the cold water injected into the cold pipe can be correspondingly adjusted according to the temperature of the steam input into the heater shell, the waste heat of the steam can be fully utilized, the fact that the temperature of the steam is relatively low can be avoided, the cold water heat exchanging effect is poor, and the utilization rate of the hydrophobic energy is optimized.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the disclosure.

FIG. 1 is a schematic view of a part of a three-dimensional structure of the present utility model;

FIG. 2 is a schematic view of a heater housing of the present utility model in a cut-away view;

FIG. 3 is a schematic view of a heater housing of the present utility model in a cut-away view;

FIG. 4 is a schematic view of a portion of a three-dimensional structure of the present utility model;

FIG. 5 is a schematic side view of the present utility model;

FIG. 6 is a schematic view of a mounting structure of a metal heat conducting fin according to the present utility model;

FIG. 7 is a schematic view of a broken-away, straight tube structure of the present utility model;

FIG. 8 is an enlarged schematic view of the structure of FIG. 7A according to the present utility model;

fig. 9 is a schematic diagram illustrating the operation principle of an embodiment of the present utility model.

[ reference numerals ]

1. A heater housing; 2. a front end sealing cover; 3. a terminal seal cap; 4. a cold water pipe; 5. a flow guiding column; 6. a spiral deflector; 7. a steam input pipe; 8. a straight pipe; 9. a flow rate adjusting tube; 10. a control lever; 11. a valve plate; 12. a flow hole; 13. an arc-shaped block; 14. a metal heat conductive sheet; 15. a thermally conductive metal ring; 16. a clamp; 17. an air bag; 18. a fixed plate; 19. and (3) a spring.

While particular structures and devices are shown in the drawings to enable a clear implementation of embodiments of the utility model, this is for illustrative purposes only and is not intended to limit the utility model to the particular structures, devices and environments, which may be modified or adapted by those of ordinary skill in the art, as desired, and which remain within the scope of the appended claims.

Detailed Description

The utility model provides an energy recovery system of a heat supply steam extraction pipeline of a thermal power plant, which is described in detail below with reference to the accompanying drawings and specific embodiments. While the utility model has been described herein in terms of the preferred and preferred embodiments, the following embodiments are intended to be more illustrative, and may be implemented in many alternative ways as will occur to those of skill in the art; and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the utility model specifically.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.

It will be understood that the meanings of "on … …", "over … …" and "over … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on" but also includes meaning "directly on" something with intervening features or layers therebetween, and "over … …" or "over … …" means not only "on" or "over" something, but also may include its meaning "on" or "over" something without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under …," "under …," "lower," "above …," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

As shown in fig. 1-9, an embodiment of the present utility model provides a heat supply and steam extraction pipeline energy recovery system of a thermal power plant, which comprises a low pressure cylinder communicated with a steam extraction end of a medium pressure cylinder through a communicating pipe regulating valve, a heat supply and steam extraction main pipe which is fed with a heat supply and steam extraction electric stop valve through a heat supply and steam extraction check valve and a steam extraction electric stop valve, and is then fed to a heat supply head station for supplying heat, and is communicated with the steam extraction end of the medium pressure cylinder, and a drainage component arranged on a front pipeline of the heat supply and steam extraction check valve, wherein the drainage component is used for preventing water accumulation in a heat supply pipeline and comprises a drainage pipeline, the drainage component is also communicated with a low pressure heater, the low pressure heater comprises a heater shell 1, a plurality of cold water pipes 4 are arranged on the heater shell 1, one end of the heater shell 1 is internally fed with steam through a steam input pipe 7 and is heated by a plurality of cold water pipes 4, and a spiral guide plate 6 for guiding the steam is also arranged in the heater shell 1; the cold water pipe 4 is internally provided with a valve assembly for controlling the flow speed of water flow, the valve assembly comprises a plurality of valve plates 11 sleeved on a control rod 10, the valve plates 11 are respectively provided with a circulation hole 12 with different apertures, the aperture of the circulation hole 12 at the highest position is sequentially enlarged from top to bottom, the steam input pipe 7 is also provided with an air bag 17 for controlling the control rod 10 to ascend and descend, the air bag 17 is internally provided with hydrogen peroxide, the steam input pipe 7 is also provided with a triggering assembly for controlling the expansion of the air bag 17, the triggering assembly comprises a plurality of metal heat conducting sheets 14 which are inserted on the steam input pipe 7, and the metal heat conducting sheets 14 are used for conducting the steam heat in the steam input pipe 7 to the air bag 17;

the utility model aims to recover the hydrophobic heat of the pre-heating steam in front of a steam extraction check valve, the recovery requirement is to fully pre-heat a pipeline in front of the steam extraction check valve under the premise of ensuring the operation safety of a unit, and referring to an attached figure 9, the optimal recovery is selected as a low-pressure heater by analyzing equipment parameters, the low-pressure heater adopts a medium-pressure cylinder steam exhaust (5-stage steam extraction) to heat condensation water, the steam extraction parameters are consistent with heat supply steam extraction, the maximum recovery of energy can be realized, and the utility model is specifically designed to add a bypass which leads to a steam supply pipeline of the low-pressure heater on the basis of original drainage, the pre-heating steam in front of the steam extraction check valve is directly discharged into the low-pressure heater to realize the pre-heating and energy recovery of the steam supply pipeline under the normal operation condition, and when the heat cannot be recovered to the low-pressure heater, the drainage is discharged into a condenser to ensure the operation safety of the pipeline, and the full operation safety of the unit is ensured under the premise of recovering the drainage energy;

in addition, through setting up the air current guide structure such as spiral guide plate 6 in heater casing 1, after the guide steam gets into heater casing 1, can be along the guide effect of spiral guide plate 6, fully be detained in the low pressure heater inside, thereby fully exchange heat to the cold water in the cold water pipe 4, improve the utilization ratio of steam energy, in addition, through the heat conduction of metal conducting strip 14 with steam heat to gasbag 17, make the hydrogen peroxide in it heated and decomposed, release oxygen, promote the gasbag 17 inflation, and promote a plurality of control rods 10, and then change the rivers velocity of flow in the cold water pipe 4, can adapt the temperature of steam, correspond the velocity of flow of adjustment cold water, make full use of the waste heat of steam under the different temperatures, the effect of steam utilization has been optimized.

As shown in fig. 2 and 3, both ends of the heater shell 1 are respectively connected with a front end sealing cover 2 and a tail end sealing cover 3 through flange plates, one end inner diameter of a steam input pipe 7 is smaller than the inner diameter of the heater shell 1, the steam input pipe 7 is arranged at one end of the front end sealing cover 2, the other end of the steam input pipe 7 is communicated with a drainage pipeline, a plurality of cold water pipes 4 are arranged on the heater shell 1 by taking the axis of the heater shell 1 as an axis and in a circumferential array, the cold water pipes 4 are used for conveying cold water, input ends of the cold water pipes 4 are communicated with straight pipes 8, a spiral guide plate 6 is sleeved on the inner wall of the heater shell 1, the center position of the spiral guide plate 6 is sleeved with a guide post 5 coaxial with the spiral guide post 6, both ends of the guide post 5 are respectively matched with the front end sealing cover 2 and the tail end sealing cover 3, round corners are formed at both ends of the guide post 5, steam can flow along the path of the guide post 5 and the spiral guide plate 6 after being input into the heater shell 1 through the steam input pipe 7, until the cold water flows along the guide post 5 and the guide way of the spiral guide plate 6, the cold water pipes are discharged from the outer side of the heater shell 1, the cold water flows along the path of the spiral guide plate 6, the heat exchanger 4 is cooled down, the heat exchanger is cooled down, the steam is cooled down along the heat exchanger 4, the heat exchanger is cooled down, and the steam is cooled down, and the heat-down, and the steam is cooled down and the heat-exchanged down, and the heat is cooled down, and the heat-exchanged down, and the heat is cooled down by the heat and cooled down.

As shown in fig. 1-8, the plurality of straight pipes 8 are respectively provided with a flow velocity adjusting pipe 9 communicated with the corresponding straight pipe 8, the inner diameter of the flow velocity adjusting pipe 9 is larger than the inner diameter of the straight pipe 8, a plurality of control rods 10 are respectively sleeved in the corresponding straight pipe 8 in a sliding way, a plurality of valve plates 11 at the same relative position are respectively fixedly sleeved at one end of the corresponding control rod 10 and are consistent with the inner diameter of the corresponding straight pipe 8, the bottom end of the control rod 10 is fixedly connected with an arc-shaped block 13, a fixed disk 18 is also arranged on the outer wall of one end of the straight pipe 8, the control rod 10 is sleeved on the corresponding fixed disk 18 in a sliding way, a plurality of arc-shaped blocks 13 are respectively attached to the outer wall of an air bag 17, springs 19 are respectively sleeved on the plurality of control rods 10, two ends of the springs 19 are respectively connected to the corresponding fixed disk 18 and the arc-shaped block 13, one end of the plurality of metal heat conducting sheets 14 positioned outside the steam input pipe 7 is respectively connected with the same heat conducting metal ring 15, the heat conducting metal ring 15 is provided with a plurality of hoops 16 which are uniformly distributed, the air bags 17 are sleeved in the hoops 16, after the steam is introduced into the heater shell 1 through the steam input pipe 7, the steam is preferentially contacted with the metal heat conducting sheets 14, then part of steam heat is conducted to the heat conducting metal ring 15 through the metal heat conducting sheets 14, then the collected heat is conducted to the air bags 17 through the heat conducting metal ring 15, further the hydrogen peroxide in the air bags 17 is promoted to be heated and decomposed into oxygen, the air bags 17 are promoted to expand, further under the guiding action of the straight pipes 8, one ends of the control rods 10 are mutually far away, the springs 19 are compressed and deformed, the control rods 10 move in the corresponding straight pipes 8, so that valve plates 11 at corresponding heights enter the flow speed adjusting pipes 9, and the diameters of the flow holes 12 at different heights on the same relative position are different, the flow rate of cold water in the straight pipe 8 can be correspondingly adjusted through the valve plate 11 retained in the straight pipe 8, so that the flow rate of cold water injected into the cold water pipe 4 is correspondingly adjusted according to the temperature of steam in the heater shell 1, the waste heat of the steam can be fully utilized, the phenomenon that the temperature of the steam is relatively low, the cold water heat exchange effect is poor is avoided, and the utilization rate of hydrophobic energy is optimized.

According to the technical scheme, through analyzing equipment parameters, the optimal recovery is selected as the low-pressure heater, the low-pressure heater heats condensed water by adopting medium-pressure cylinder exhaust steam, steam extraction parameters are consistent with heat supply steam extraction, the maximum recovery of energy can be realized, the device is specifically designed to increase a bypass leading to a steam supply pipeline of the low-pressure heater on the basis of original drainage, pre-heating steam in front of a steam extraction check valve is directly discharged into the low-pressure heater under the normal operation condition to realize the pre-heating of the steam supply pipeline and the recovery of energy, when the heat cannot be recovered to the low-pressure heater, drainage is discharged into a condenser, the pipeline pre-heating and the unit operation safety are ensured, and according to the condition that the drainage energy cannot be recovered, the device adopts a brand new design, and on the premise that the drainage energy is recovered, the full pre-heating of a pipeline in front of the steam extraction check valve is ensured, and the operation safety of the unit is ensured.

When cold water in the cold water pipe is heated through hydrophobic energy, after steam is guided into the heater shell by the steam input pipe, the steam is dispersed all around under the effect of the round angle on the guide post, and then high-temperature steam flows along the spiral path of the spiral guide plate and flows towards the end sealing cover along the spiral path of the spiral guide plate, so that the retention time of the steam in the low-pressure heater is prolonged, the steam is fully contacted with a plurality of cold water pipes for heat exchange, and the heat exchange efficiency of the steam is improved.

After steam is introduced into the heater shell through the steam input pipe, the steam is preferentially contacted with the plurality of metal heat conducting fins, partial steam heat is conducted to the heat conducting metal ring through the plurality of metal heat conducting fins, the collected heat is conducted to the air bag through the heat conducting metal ring, further, the hydrogen peroxide in the air bag is promoted to be heated and decomposed into oxygen, the expansion of the air bag is promoted, further, under the guiding effect of the straight pipe, one ends of the plurality of control rods are mutually far away, the springs are compressed and deformed, the control rods move in the corresponding straight pipe, valve plates at corresponding heights enter the flow speed adjusting pipe, and due to different pore diameters of circulation holes at the same relative position, the flow speed of cold water in the straight pipe can be correspondingly adjusted through the valve plates in the straight pipe, so that the flow speed of the cold water injected into the cold pipe can be correspondingly adjusted according to the temperature of the steam input into the heater shell, the waste heat of the steam can be fully utilized, the fact that the temperature of the steam is relatively low can be avoided, the cold water heat exchanging effect is poor, and the utilization rate of the hydrophobic energy is optimized.

The utility model is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the utility model. In the following description of preferred embodiments of the utility model, specific details are set forth in order to provide a thorough understanding of the utility model, and the utility model will be fully understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present utility model.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the embodiments described above may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as: ROM/RAM, magnetic disks, optical disks, etc.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. The energy recovery system of the heat supply steam extraction pipeline of the thermal power plant is characterized by comprising a low-pressure cylinder communicated with a steam extraction end of a medium-pressure cylinder through a communicating pipe regulating valve, a branch loop which is communicated with the steam extraction end of the medium-pressure cylinder and is used for preventing water accumulation in the heat supply pipeline and comprises a drain pipeline through a heat supply steam extraction check valve, a heat supply steam extraction regulating valve and a heat supply steam extraction electric stop valve, wherein one end of the heater shell is used for inputting steam inwards through a steam input pipe and heating a plurality of cold water pipes, a spiral guide plate used for guiding the steam is further arranged in the heater shell;

the cold water pipe is internally provided with a valve assembly for controlling the flow speed of water flow, the valve assembly comprises a plurality of valve plates sleeved on a control rod, the valve plates are respectively provided with a circulation hole with different pore diameters, and the pore diameter of the circulation hole at the highest position is sequentially increased from top to bottom;

the both ends of heater casing all are connected with front end sealed lid and end seal lid respectively through the ring flange, the steam input pipe is installed the one end of front end sealed lid, just the other end of steam input pipe with the drainage pipeline is linked together.

2. The heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 1, wherein the steam input pipe is further provided with an air bag for controlling the control rod to lift, hydrogen peroxide is arranged in the air bag, the steam input pipe is further provided with a triggering component for controlling the expansion of the air bag, the triggering component comprises a plurality of metal heat conducting fins inserted on the steam input pipe, and the metal heat conducting fins are used for conducting steam heat in the steam input pipe to the air bag.

3. The heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 1, wherein a plurality of cold water pipes are arranged on the heater shell in a circumferential array by taking the axis of the heater shell as a shaft, the cold water pipes are used for conveying cold water, and the input ends of the cold water pipes are communicated with straight pipes.

4. The energy recovery system of a heat-engine plant heating and steam extraction pipeline according to claim 2, wherein the spiral guide plate is sleeved on the inner wall of the heater shell, and a guide column coaxial with the spiral guide plate is further sleeved at the center of the spiral guide plate.

5. The heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 4, wherein two ends of the flow guide column are respectively matched with the front end sealing cover and the end sealing cover, rounded corners are formed at two ends of the flow guide column, and after steam is input into the heater shell through the steam input pipe, the steam can flow along a path of the spiral flow guide plate under the flow guide of the flow guide column and the spiral flow guide plate until the steam is discharged out of the heater shell.

6. A heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 3, wherein a plurality of straight pipes are provided with flow rate adjusting pipes communicated with the corresponding straight pipes, and the inner diameter of each flow rate adjusting pipe is larger than the inner diameter of each straight pipe.

7. The heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 6, wherein a plurality of control rods are respectively sleeved in the corresponding straight pipes in a sliding manner, and a plurality of valve plates at the same relative position are fixedly sleeved at one ends of the corresponding control rods and are consistent with the inner diameters of the corresponding straight pipes.

8. The heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 7, wherein the bottom ends of the control rods are fixedly connected with arc blocks, a fixed disc is further installed on the outer wall of one end of the straight pipe, the control rods are slidably sleeved on the corresponding fixed disc, and a plurality of arc blocks are attached to the outer wall of the air bag.

9. The energy recovery system of the heat-engine plant heating and steam extraction pipeline according to claim 8, wherein a plurality of control rods are respectively sleeved with springs, and two ends of each spring are respectively connected to the corresponding fixed disc and the corresponding arc-shaped block.

10. The heat-engine plant heat supply steam extraction pipeline energy recovery system according to claim 2, wherein one end of the plurality of metal heat-conducting fins located outside the steam input pipe is connected with a same heat-conducting metal ring, a plurality of hoops which are uniformly distributed are arranged on the heat-conducting metal ring, and the air bags are sleeved in the hoops.

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