CN210319374U - Ball valve stop valve composite steam drainage system - Google Patents

Abstract

The utility model discloses a ball valve stop valve complex steam drainage system, include: a steam line; the steam pipeline is vertically connected below the steam pipeline, and a pneumatic ball valve and a pneumatic stop valve are arranged on the steam pipeline; the collecting pipe is horizontally arranged below the drain pipe and is connected with the drain pipe; and the inlet end of the drainage flash tank is connected with the water outlet end of the header. The drain water in the steam pipeline sequentially passes through the drain pipeline and the collecting pipe and finally is gathered in the drain flash tank. The pneumatic stop valve has poor tightness but is resistant to scouring, and is used when the working medium is not clean, so that the sealing surface of the pneumatic hydrophobic ball valve is protected; the pneumatic ball valve has good tightness but is not resistant to scouring, and is only used after the cleanliness of working media is increased, so that the working media are prevented from being lost, and the good heat economy of a unit is kept.

Description

Ball valve stop valve composite steam drainage system

Technical Field

The utility model relates to a hydrophobic recovery technical field, concretely relates to ball valve stop valve complex steam drainage system.

Background

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.

The design specification of steam-water pipelines of a thermal power plant (DL/T5054-2016) stipulates that only one manual stop valve is generally arranged for starting a steam-water pipeline, and a pneumatic steam-water stop valve is generally arranged for a unit with higher automation degree. The drainage refers to steam condensate in steam equipment for a steam pipeline, and in order to ensure smooth steam heat supply, the part of the steam condensate needs to be discharged out of the steam pipeline in time. The steam-water system of power plant is in the trial run or overhauls the maintenance back, and the filth and the impurity that exist in a large number in equipment and steam conduit can be along with hydrophobic drain pipe drain away, and the sealed face of trap can take place the damage after long-time the washing, and steam conduit working medium reveals when leading to normal operating easily, influences unit operation economic nature. Moreover, if the dirt in the steam pipeline is more, the blockage of the drainage pipeline is easily caused, and the normal drainage of the drainage is influenced.

Disclosure of Invention

To the technical problem who exists among the above-mentioned prior art, the utility model aims at providing a ball valve stop valve complex steam drainage system.

In order to solve the technical problem, the technical scheme of the utility model is that:

a ball valve shut-off valve hybrid steam trap system comprising:

a steam line;

the steam pipeline is vertically connected below the steam pipeline, and a pneumatic ball valve and a pneumatic stop valve are arranged on the steam pipeline;

the collecting pipe is horizontally arranged below the drain pipe and is connected with the drain pipe;

and the inlet end of the drainage flash tank is connected with the water outlet end of the header.

The drain water in the steam pipeline sequentially passes through the drain pipeline and the collecting pipe and finally is gathered in the drain flash tank. The pneumatic stop valve has poor tightness but is resistant to scouring, and is used when the working medium is not clean, so that the sealing surface of the pneumatic hydrophobic ball valve is protected; the pneumatic ball valve has good tightness but is not resistant to scouring, and is only used after the cleanliness of working media is increased, so that the working media are prevented from being lost, and the good heat economy of a unit is kept.

In some embodiments, a manual shut-off valve is also provided on the drain header.

In some embodiments, a conical diversion piece is arranged at the joint of the drainage pipeline and the steam pipeline, the large-diameter end of the conical diversion piece is communicated with the bottom of the steam pipeline, and the small-diameter end of the conical diversion piece is connected with the upper end of the drainage pipeline.

Because more dirt and impurities possibly exist in the steam pipeline, the dirt exists in the hydrophobic water, and if the opening of the joint of the hydrophobic pipeline and the steam pipeline is smaller, the dirt is easily gathered at the joint, so that the opening is blocked. Set up toper water conservancy diversion spare, can increase the opening of junction, effectively prevent the gathering of filth, avoid blockking up. When the dirt flows to the small-diameter end of the conical diversion part along with the drainage water, the drainage water increases the flow velocity under the action of a certain height difference, generates a certain impact force, and can smoothly flush the dirt at the small-diameter end of the diversion part into the drainage pipeline.

The vertical setting of drain pipe also can prevent the jam of filth.

In some embodiments, the lower outlet of the hydrophobic conduit is vertically disposed. Clogging can be further prevented.

In some embodiments, the bottom interior wall of the header is sloped downwardly toward the hydrophobic flash tank.

The drain flowing down from the drain pipeline carries solid dirt to flow into the drain flash tank along the downward-inclined collecting pipe more easily, so that the solid dirt can be effectively prevented from being deposited in the collecting pipe.

In some embodiments, the outer wall of the casing of the hydrophobic flash tank is provided with a jacket, and the jacket is provided with a condensed water inlet and a condensed water outlet. And condensed water is introduced into the jacket, so that the high-temperature drain in the drain flash tank can be cooled, and the cooled drain is discharged and reused.

Furthermore, a drain outlet of the drain flash tank is positioned at the bottom of the drain flash tank.

Furthermore, the bottom of the hydrophobic flash tank is in an inverted cone shape. High temperature is hydrophobic after the condensation, flows from the bottom of hydrophobic flash tank, because probably contain a large amount of impurity in the hydrophobic, sets up the bottom into the back taper, and solid impurity is discharged from the bottom more easily, prevents to gather in hydrophobic flash tank.

Furthermore, a steam outlet is arranged at the top of the hydrophobic flash tank. The vapor is discharged through the vapor outlet and the internal pressure of the flash tank is reduced.

When the unit is stopped or the load is low, the manual stop valve, the pneumatic drainage ball valve and the pneumatic drainage stop valve are all kept open, so that the drainage smoothness of the steam pipeline is ensured; when the load of the unit rises gradually, the manual stop valve and the pneumatic drain ball valve are still kept in an open state, the medium is prevented from scouring the sealing surface of the valve, and the pneumatic drain stop valve is only used for controlling the opening and closing of the drain pipe system; after the unit load surpassed drain pipe system operation scope steady operation, the trunk line blowdown was accomplished, and working medium cleanliness factor rose, and the destruction effect that erodees of drainage to the sealed face of trap reduces by a wide margin, and the pneumatic drainage ball valve of putting into operation carries out the system and closes this moment, also can close pneumatic drainage ball valve and pneumatic drainage stop valve simultaneously. The manual shut-off valve acts as a backup valve in the event of a power operated valve failure and remains open during start-up and normal operation.

The utility model has the advantages that:

the pneumatic stop valve has poor tightness but is resistant to scouring, and is used when the working medium is not clean, so that the sealing surface of the pneumatic hydrophobic ball valve is protected; the pneumatic ball valve has good tightness but is not resistant to scouring, and is only used after the cleanliness of working media is increased, so that the working media are prevented from being lost, and the good heat economy of a unit is kept.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a hydrophobic flash tank according to an embodiment of the present invention.

The system comprises a steam pipeline 1, a manual stop valve 2, a pneumatic ball valve 3, a pneumatic stop valve 4, a hydrophobic flash tank 5, a header 6, a steam outlet 7, a hydrophobic inlet 8, a manhole 9, a hydrophobic outlet 10, a condensed water inlet 11 and a condensed water outlet 12.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 and 2, a ball valve cut-off valve combined steam trap system comprises: a steam pipe 1; the steam pipeline 1 is vertically connected below the drainage pipeline, the drainage pipeline is provided with a pneumatic ball valve 3, a pneumatic stop valve 4 and a manual stop valve 2, a conical flow guide part is arranged at the joint of the drainage pipeline and the steam pipeline 1, the large-diameter end of the conical flow guide part is communicated with the bottom of the steam pipeline 1, and the small-diameter end of the conical flow guide part is connected with the upper end of the drainage pipeline; and the collecting pipe 6 is horizontally arranged below the drain pipe and is connected with the drain pipe, and the outlet at the lower end of the drain pipe is vertically arranged. The bottom inner wall of the header 6 is disposed to slope downward toward the flash tank 5. The solid dirt carried by the drain flowing down from the drain pipeline flows into the drain flash tank 5 along the downward-inclined collecting pipe 6 more easily, and the solid dirt can be effectively prevented from being deposited in the collecting pipe.

The inlet end of the flash tank 5 is connected to the outlet end of the header 6. As shown in FIG. 3, the outer wall of the casing of the hydrophobic flash tank 5 is provided with a jacket, and the jacket is provided with a condensed water inlet 11 and a condensed water outlet 12. Condensed water is introduced into the jacket, so that the high-temperature drain in the drain flash tank 5 can be cooled, and the cooled drain is discharged and reused. The drain outlet of the drain flash 5 is located at the bottom of the drain flash 5. The bottom of the drain flash tank 5 is in an inverted cone shape. High temperature is hydrophobic through the condensation after, flows from the bottom of hydrophobic flash tank 5, because probably contain a large amount of impurity in the hydrophobic, sets up the bottom into the back taper, and solid impurity is discharged from the bottom more easily, prevents to gather in hydrophobic flash tank 5. The top of the hydrophobic flash tank 5 is provided with a steam outlet 7. The drainage flash tank 5 is of a vertical tank structure and can also be of a horizontal structure.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. The utility model provides a compound steam drainage system of ball valve stop valve which characterized in that: the method comprises the following steps:

a steam line;

the steam pipeline is vertically connected below the steam pipeline, and a pneumatic ball valve and a pneumatic stop valve are arranged on the steam pipeline;

the collecting pipe is horizontally arranged below the drain pipe and is connected with the drain pipe;

and the inlet end of the drainage flash tank is connected with the water outlet end of the header.

2. The steam trap system of claim 1, wherein: and a manual stop valve is also arranged on the drain header.

3. The steam trap system of claim 1, wherein: the junction of drain pipe and steam conduit is provided with toper water conservancy diversion spare, and its major diameter end communicates with steam conduit's bottom, and the minor diameter end is connected with drain pipe's upper end.

4. The steam trap system of claim 3, wherein: and the outlet at the lower end of the drainage pipeline is vertically arranged.

5. The steam trap system of claim 4, wherein: the inner wall of the bottom of the header pipe is arranged downwards towards the drainage flash tank.

6. The steam trap system of claim 1, wherein: the outer wall of the shell of the drainage flash tank is provided with a jacket, and a condensed water inlet and a condensed water outlet are arranged on the jacket.

7. The steam trap system of claim 6, wherein: and a drain outlet of the drain flash tank is positioned at the bottom of the drain flash tank.

8. The steam trap system of claim 7, wherein: the bottom of the drainage flash tank is in an inverted cone shape.

9. The steam trap system of claim 1, wherein: and a steam outlet is formed in the top of the drainage flash tank.

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