CN213480199U

CN213480199U - Cogeneration system for multi-voltage industrial users by utilizing superheated steam energy

Info

Publication number: CN213480199U
Application number: CN202021350968.4U
Authority: CN
Inventors: 李成磊; 郑立军; 高新勇; 方昕玥; 汪晓龙; 曾军
Original assignee: Xinjiang Huadian Hami Thermal Power Co ltd; Huadian Electric Power Research Institute Co Ltd
Current assignee: Xinjiang Huadian Hami Thermal Power Co ltd; Huadian Electric Power Research Institute Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-06-18
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a many pressure industrial user utilize cogeneration system of superheated steam energy, including the steam turbine, the feed pump, steam heat exchanger, pressure adapter and low, in, the high pressure steam user, the steam extraction mouth of steam turbine supplies the access connection of vapour pipeline and steam heat exchanger heat source side through the industry, the export on steam heat exchanger heat source side falls into two the tunnel, be connected with low pressure steam user all the way, another way is connected with the low pressure access connection of pressure adapter, the import and the export on steam heat exchanger heat source side pass through steam bypass union coupling, the cold source access connection of feed pipe and steam heat exchanger, steam heat exchanger's cold source export and high pressure steam user and pressure adapter's high pressure access connection, the export and the medium pressure steam user of pressure adapter are connected. The utility model can provide steam with different pressure parameters under the condition of smaller investment, and is used for meeting diversified steam requirements of users; the problem of residual pressure loss is greatly avoided, and the loss of work-doing capability is reduced.

Description

Cogeneration system for multi-voltage industrial users by utilizing superheated steam energy

Technical Field

The utility model belongs to the technical field of the combined heat and power generation, concretely relates to many pressure industrial user utilizes the combined heat and power generation system of superheated steam energy.

Background

At present, in order to improve the comprehensive energy utilization efficiency of the thermal power generating unit and strive for more electricity generation utilization hours, the pure condensing unit is widely developed to supply heat. However, for different industrial steam users, the required steam pressure parameters have large differences due to different processes, and for a thermoelectric power unit, a steam pipeline is often laid to externally supply steam with one pressure parameter. This results in: when the pressure of the external steam supply of the thermoelectric unit is higher, residual pressure loss is caused for users with low-pressure steam requirements; when the pressure of the external steam supply of the thermoelectric unit is low, steam parameters can not meet the requirements for users with high-pressure steam requirements.

At present, aiming at the technical problem, the main technical solutions are as follows: (1) the Chinese patent 'high-low pressure two-stage industrial steam extraction and heat supply device of a steam turbine' with the application number of 201310667813.1 meets the requirements of high-low pressure two-stage steam of a heat user by leading out two high-low pressure steam pipe networks on the heat source side, but has the defect that two steam main pipelines need to be laid, thereby greatly increasing the investment cost of the pipe networks and the construction difficulty of the pipe networks; in particular, the same problem is encountered when a third or more vapor pressure parameter is required. The utility model discloses then mainly combine phase transition heat transfer, fluidic principle, carry out the steam generation of different pressure parameters in the user side, need not to increase the female pipeline of steam again, greatly reduce the pipe network investment cost and the construction degree of difficulty.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design reasonable, the dependable performance realizes the many pressure industrial user of high, medium, low pressure different parameter steam and utilizes the combined heat and power generation system of superheated steam energy.

The utility model provides a technical scheme that above-mentioned problem adopted is: a combined heat and power generation system utilizing superheated steam energy for multi-pressure industrial users is characterized by comprising a steam turbine, a water feed pump, a steam heat exchanger, a pressure matcher, a low-pressure steam user, a medium-pressure steam user and a high-pressure steam user, wherein a steam extraction port of the steam turbine is connected with an inlet on the heat source side of the steam heat exchanger through an industrial steam supply pipeline, a second valve is installed at the inlet on the heat source side of the steam heat exchanger, an outlet on the heat source side of the steam heat exchanger is divided into two paths, one path is connected with the low-pressure steam user through a third valve, the other path is connected with a low-pressure inlet of the pressure matcher through a fifth valve, the inlet and the outlet on the heat source side of the steam heat exchanger are connected through a steam bypass pipe, a fourth valve is installed on a steam bypass pipe, the water feed pipe is connected with a cold source inlet of the steam heat exchanger through the water, the high-pressure inlet of the pressure matcher is connected with the cold source outlet of the steam heat exchanger, a sixth valve is installed at the high-pressure inlet of the pressure matcher, and the outlet of the pressure matcher is connected with a medium-pressure steam user.

Further, a first valve is installed on the industrial steam supply pipeline.

Compared with the prior art, the utility model, have following advantage and effect: (1) the utility model can provide steam with different pressure parameters such as high, medium and low, and meet diversified steam requirements of users; (2) the utility model is technically innovative on the user side, and compared with the traditional technology, the steam is supplied to the outside by taking the user with the maximum steam pressure requirement as a reference, thereby greatly avoiding the problem of residual pressure loss and reducing the loss of working capacity; (3) the utility model discloses for the innovation technique through increasing the female pipe number and solving the problem, greatly reduced the investment cost and the construction degree of difficulty of project.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: the system comprises a steam turbine 1, a feed pump 2, a steam heat exchanger 3, a pressure matcher 4, a low-pressure steam user 5, a medium-pressure steam user 6, a high-pressure steam user 7, an industrial steam supply pipeline 8, a first valve 9, a second valve 10, a third valve 12, a fourth valve 19, a fifth valve 13, a steam bypass pipe 14, a feed pipe 15, a sixth valve 18 and a seventh valve 17.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1, in the present embodiment, a cogeneration system using superheated steam energy for multiple pressure industrial users comprises a steam turbine 1, a feed pump 2, a steam heat exchanger 3, a pressure adapter 4, a low pressure steam user 5, a medium pressure steam user 6 and a high pressure steam user 7, wherein a steam extraction port of the steam turbine 1 is connected to an inlet on the heat source side of the steam heat exchanger 3 through an industrial steam supply pipeline 8, a first valve 9 is installed on the industrial steam supply pipeline 8, a second valve 10 is installed on an inlet on the heat source side of the steam heat exchanger 3, an outlet on the heat source side of the steam heat exchanger 3 is divided into two paths, one path is connected to the low pressure steam user 5 through a third valve 12, the other path is connected to a low pressure inlet of the pressure adapter 4 through a fifth valve 13, an inlet and an outlet on the heat source side of the steam heat exchanger 3 are connected through a steam bypass pipe 14, and a fourth valve 19 is installed, the water supply pipe 15 is connected with the cold source inlet of the steam heat exchanger 3 through the water supply pump 2, the cold source outlet of the steam heat exchanger 3 is connected with the high-pressure steam user 7 through the seventh valve 17, the high-pressure inlet of the pressure matcher 4 is connected with the cold source outlet of the steam heat exchanger 3, the sixth valve 18 is installed at the high-pressure inlet of the pressure matcher 4, and the outlet of the pressure matcher 4 is connected with the medium-pressure steam user 6.

In the embodiment, the steam heat exchanger 3 is a phase change heat exchanger, and the superheat degree of high-temperature steam is utilized to heat feed water to produce steam with high pressure parameters; the pressure matcher 4 generates medium pressure steam intermediate between high and low pressures by mixing high pressure steam with low pressure steam.

The operation method comprises the following steps:

when the steam user is only low pressure steam user 5, at this moment, steam heat exchanger 3 and pressure matcher 4 do not all put into operation, and the industrial steam that industry extraction steam pipe 8 supplied out can satisfy steam user demand, and its operation is adjusted and is: the second valve 10, the third valve 12, the fifth valve 13, the sixth valve 18 and the seventh valve 17 are closed, the first valve 9 and the fourth valve 19 are opened, and the steam turbine 1 supplies steam to the low-pressure steam consumer 5 directly through the industrial steam extraction pipe 8.

When the steam users comprise the low-pressure steam users 5, the medium-pressure steam users 6 and the high-pressure steam users 7, the industrial steam supplied through the industrial steam extraction pipe 8 can not meet diversified steam pressure requirements any more, at the moment, the steam heat exchanger 3 and the pressure matcher 4 are put into operation, namely, the second valve 10, the fifth valve 13, the sixth valve 18 and the seventh valve 17 are opened and adjusted, the third valve 12 is closed, the superheat degree of the industrial steam is utilized to heat the supplied water, the high-pressure steam is produced and supplied to the high-pressure steam users 7, and the high-pressure steam is mixed with the low-pressure steam through the pressure matcher 4 to form medium-pressure steam which is supplied to the medium-pressure steam users 6.

Those not described in detail in this specification are well within the skill of the art.

In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A heat and power cogeneration system utilizing superheated steam energy for multi-pressure industrial users is characterized by comprising a steam turbine (1), a water feeding pump (2), a steam heat exchanger (3), a pressure matcher (4), a low-pressure steam user (5), a medium-pressure steam user (6) and a high-pressure steam user (7), wherein a steam extraction port of the steam turbine (1) is connected with an inlet on the heat source side of the steam heat exchanger (3) through an industrial steam supply pipeline (8), a second valve (10) is installed at an inlet on the heat source side of the steam heat exchanger (3), an outlet on the heat source side of the steam heat exchanger (3) is divided into two paths, one path is connected with the low-pressure steam user (5) through a third valve (12), the other path is connected with a low-pressure inlet of the pressure matcher (4) through a fifth valve (13), and the inlet and the outlet on the heat source side of the steam heat exchanger (3) are connected through, and install fourth valve (19) on steam by-pass pipe (14), feed pipe (15) are through the cold source access connection of feed pump (2) with steam heat exchanger (3), the cold source export of steam heat exchanger (3) is connected with high-pressure steam user (7) through seventh valve (17), the high-pressure import of pressure matcher (4) and the cold source exit linkage of steam heat exchanger (3), and install sixth valve (18) at the high-pressure import of pressure matcher (4), the export of pressure matcher (4) is connected with medium pressure steam user (6).

2. Cogeneration system according to claim 1, characterised in that said industrial steam supply duct (8) is equipped with a first valve (9).