Factory steam centralized conveying system

Abstract

The utility model discloses a factory steam centralized conveying system. Comprising a first high-pressure steam boiler (1), a first desuperheater (2), a first low-pressure steam boiler (3), a first pressure matcher (4), a second high-pressure steam boiler (5), a second desuperheater (6), a second low-pressure steam boiler (7), a second pressure matcher (8), an air exhaust main pipe (9), an auxiliary steam header (10), a steam seal temperature and pressure reducer (11), a waste heat boiler deaerator (12), a waste heat boiler high-pressure evaporator (13) and a boiler make-up aquatic water heater (14). The utility model relates to the technical field of heat supply systems, in particular to a centralized steam conveying system for factories. The utility model has the advantages that high-pressure steam is cooled by the desuperheater and then is conveyed to each steam using station together with low-pressure steam through the pressure matcher, and the steam is reasonably used in a graded manner according to different steam requirements of each station.

Description

Technical Field

[0001] The utility model relates to the technical field of heating systems, and particularly relates to a centralized steam conveying system for factories. Background Art

[0002] Due to the many advantages of natural gas power generation, such as environmental protection, energy conservation, safety and reliability, it is increasingly being applied. During the entire power generation process, the utilization of steam and the layout of the conveying system are directly related to the energy consumption utilization rate. Content of the Utility Model

[0003] The purpose of the utility model is to provide a centralized steam conveying system for factories in view of the above deficiencies.

[0004] The utility model includes a first high-pressure steam boiler, a first desuperheater, a first low-pressure steam boiler, a first pressure matcher, a second high-pressure steam boiler, a second desuperheater, a second low-pressure steam boiler, a second pressure matcher, an extraction main pipe, an auxiliary steam header, a steam seal desuperheating and pressure reducing device, a deaerator for the waste heat boiler, a high-pressure evaporator of the waste heat boiler, a raw water heater for boiler make-up water, and a natural gas dew point heater.

[0005] The steam outlet of the first high-pressure steam boiler is communicated with the steam inlet of the first desuperheater through a pipeline, and the steam outlets of the first low-pressure steam boiler and the first desuperheater are respectively communicated with the steam inlets of the first pressure matcher.

[0006] The steam outlet of the second high-pressure steam boiler is communicated with the steam inlet of the second desuperheater through a pipeline, and the steam outlets of the second low-pressure steam boiler and the second desuperheater are respectively communicated with the steam inlets of the second pressure matcher.

[0007] The steam outlets of the first pressure matcher and the second pressure matcher are respectively communicated with the extraction main pipe through a tee pipe. The end of the extraction main pipe is provided with a first air outlet, and a second air outlet is provided on the extraction main pipe between the two tee pipes. Cut-off valves are respectively provided on the extraction main pipe on both sides of the second air outlet. The second air outlet is communicated with the inlet of the auxiliary steam header through a pipeline. A plurality of branch air outlets are provided on the auxiliary steam header, and the plurality of branch air outlets are respectively communicated with the corresponding steam seal desuperheating and pressure reducing device, deaerator for the waste heat boiler, high-pressure evaporator of the waste heat boiler, raw water heater for boiler make-up water, natural gas dew point heater, and the first air outlet through pipelines.

[0008] The steam outlets between the first pressure matcher and the second pressure matcher are communicated through a pressure relief and vent pipe. Pressure relief and vent valves are provided on the pressure relief and vent pipe and the inlets of the two tee pipes.

[0009] A U-shaped connecting pipe is connected to the pressure relief and vent pipe, and stop valves are respectively provided at both ends of the U-shaped connecting pipe. The pressure relief and vent valve on the pressure relief and vent pipe is arranged on the U-shaped connecting pipe between the two stop valves.

[0010] The pressure relief and vent pipe is a DN350 steel pipe.

[0011] Multiple groups of steam regulating valves are provided between the first low-pressure steam boiler and the steam inlet of the first pressure matcher, and between the second low-pressure steam boiler and the steam inlet of the second pressure matcher.

[0012] The steam outlet pipes of the first pressure matcher and the second pressure matcher are both DN250 steel pipes.

[0013] The inlet end pipe of the tee is a DN350 steel pipe.

[0014] The extraction main pipe is a DN450 steel pipe.

[0015] Both the first pressure matcher and the second pressure matcher are multi-nozzle pressure matchers.

[0016] The advantages of the present utility model are as follows: After the high-pressure steam is cooled by the desuperheater, it is transported to each steam usage station together with the low-pressure steam through the pressure matcher. According to the different steam demands of each station, the steam is rationally classified and used, effectively saving energy consumption and improving the utilization rate of steam. Brief Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the present utility model. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, 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. Therefore, it should not be construed as a limitation on the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0021] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "connect" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] As shown in the drawings, the utility model includes a first high-pressure steam boiler 1, a first desuperheater 2, a first low-pressure steam boiler 3, a first pressure matcher 4, a second high-pressure steam boiler 5, a second desuperheater 6, a second low-pressure steam boiler 7, a second pressure matcher 8, an extraction main pipe 9, an auxiliary steam header 10, a steam seal desuperheating and pressure reducing device 11, a deaerator for waste heat boiler 12, a high-pressure evaporator for waste heat boiler 13, a raw water heater for boiler make-up water 14, and a natural gas dew point heater 15.

[0023] The steam outlet of the first high-pressure steam boiler 1 is communicated with the steam inlet of the first desuperheater 2 through a pipeline, and the steam outlets of the first low-pressure steam boiler 3 and the first desuperheater 2 are respectively communicated with the steam inlets of the first pressure matcher 4.

[0024] The steam outlet of the second high-pressure steam boiler 5 is communicated with the steam inlet of the second desuperheater 6 through a pipeline, and the steam outlets of the second low-pressure steam boiler 7 and the second desuperheater 6 are respectively communicated with the steam inlets of the second pressure matcher 8.

[0025] The steam outlets of the first pressure matcher 4 and the second pressure matcher 8 are respectively communicated with the extraction main pipe 9 through the three-way pipes 18. The end of the extraction main pipe 9 is provided with a first air outlet 20. A second air outlet 21 is provided on the extraction main pipe 9 between the two three-way pipes 18, and stop valves are respectively provided on the extraction main pipe 9 on both sides of the second air outlet 21. The second air outlet 21 is communicated with the inlet of the auxiliary steam header 10 through a pipeline. The auxiliary steam header 10 is provided with a plurality of branched air outlets, and the plurality of branched air outlets are respectively communicated with the corresponding steam seal desuperheater 11, the waste heat boiler deaerator 12, the waste heat boiler high-pressure evaporator 13, the boiler make-up water raw water heater 14, the natural gas dew point heater 15 and the first air outlet 20 through pipelines.

[0026] The steam outlets between the first pressure matcher 4 and the second pressure matcher 8 are communicated through a pressure relief and vent pipe 24, and pressure relief and vent valves 25 are provided on the pressure relief and vent pipe 24 and the inlets of the two three-way pipes 18.

[0027] A U-shaped connecting pipe 26 is connected to the pressure relief and vent pipe 24, and stop valves are respectively provided at both ends of the U-shaped connecting pipe 26. The pressure relief and vent valve 25 on the pressure relief and vent pipe 24 is arranged on the U-shaped connecting pipe 26 between the two stop valves. In the shutdown state, the pressure relief and vent valve 25 is used to relieve the pressure of the pipeline and discharge the gas in the pipeline. The pressure relief and vent valve 25 on the U-shaped connecting pipe 26 can separately vent the gas output by the first pressure matcher 4 or the second pressure matcher 8 as needed.

[0028] The pressure relief and vent pipe 24 is a DN350 steel pipe.

[0029] Multiple groups of steam regulating valves 27 are provided between the first low-pressure steam boiler 3 and the steam inlet of the first pressure matcher 4 and between the second low-pressure steam boiler 7 and the steam inlet of the second pressure matcher 8. The steam flow rate entering the first pressure matcher 4 or the second pressure matcher 8 can be adjusted as needed to facilitate controlling its pressure.

[0030] The steam outlet pipes of the first pressure matcher 4 and the second pressure matcher 8 are both DN250 steel pipes.

[0031] The inlet end pipe of the three-way pipe 18 is a DN350 steel pipe.

[0032] The extraction main pipe 9 is a DN450 steel pipe.

[0033] The diameters of the pipelines through which the steam flows from the first pressure matcher 4 and the second pressure matcher 8 to the extraction main pipe 9 gradually increase, so that the steam pressure output from the extraction main pipe 9 to each working station remains stable.

[0034] Both the first pressure matcher 4 and the second pressure matcher 8 are multi-nozzle pressure matchers.

[0035] Working mode: The high-pressure steam of the first high-pressure steam boiler 1 is cooled by the first desuperheater 2 and then enters the extraction main pipe 9 in combination with the low-pressure steam of the first low-pressure steam boiler 3 under the matching of the first pressure matcher 4. At the same time, the high-pressure steam of the second high-pressure steam boiler 5 is cooled by the second desuperheater 6 and then enters the extraction main pipe 9 in combination with the low-pressure steam of the second low-pressure steam boiler 7 under the matching of the second pressure matcher 8. A part of the steam in the extraction main pipe 9 enters the auxiliary steam header 10 through the second outlet 21 and is distributed to the steam seal desuperheater 11, the deaerator of the waste heat boiler 12, the high-pressure evaporator of the waste heat boiler 13, the raw water heater for boiler make-up water 14, and the natural gas dew point heater 15 through the auxiliary steam header 10. The first outlet 20 is used to discharge the remaining gas after the distribution is completed.

Claims

1. A factory steam centralized transportation system, characterized in that It includes a first high-pressure steam boiler (1), a first desuperheater (2), a first low-pressure steam boiler (3), a first pressure matcher (4), a second high-pressure steam boiler (5), a second desuperheater (6), a second low-pressure steam boiler (7), a second pressure matcher (8), an extraction header (9), an auxiliary steam header (10), a steam seal desuperheating and pressure reducing device (11), a waste heat boiler deaerator (12), a waste heat boiler high-pressure evaporator (13), a boiler make-up water raw water heater (14), and a natural gas dew point heater (15). The steam outlet of the first high-pressure steam boiler (1) is communicated with the steam inlet of the first desuperheater (2) through a pipeline, and the steam outlets of the first low-pressure steam boiler (3) and the first desuperheater (2) are respectively communicated with the steam inlets of the first pressure matcher (4). The steam outlet of the second high-pressure steam boiler (5) is communicated with the steam inlet of the second desuperheater (6) through a pipeline, and the steam outlets of the second low-pressure steam boiler (7) and the second desuperheater (6) are respectively communicated with the steam inlets of the second pressure matcher (8). The steam outlets of the first pressure matcher (4) and the second pressure matcher (8) are respectively communicated with the extraction header (9) through a tee pipe (18). The end of the extraction header (9) is provided with a first air outlet (20). A second air outlet (21) is provided on the extraction header (9) between the two tee pipes (18), and stop valves are respectively provided on the extraction header (9) on both sides of the second air outlet (21). The second air outlet (21) is communicated with the inlet of the auxiliary steam header (10) through a pipeline. A plurality of branched air outlets are provided on the auxiliary steam header (10), and the plurality of branched air outlets are respectively communicated with the corresponding steam seal desuperheating and pressure reducing device (11), waste heat boiler deaerator (12), waste heat boiler high-pressure evaporator (13), boiler make-up water raw water heater (14), natural gas dew point heater (15), and the first air outlet (20) through pipelines.

2. The factory steam centralized transportation system according to claim 1, characterized in that The steam outlets of the first pressure matcher (4) and the second pressure matcher (8) are communicated with each other through a pressure relief and vent pipe (24). Pressure relief and vent valves (25) are provided on the pressure relief and vent pipe (24) and the inlets of the two tee pipes (18).

3. A factory steam centralized conveying system according to claim 2, characterized in that A U-shaped connecting pipe (26) is connected to the pressure relief and vent pipe (24), and stop valves are respectively provided at both ends of the U-shaped connecting pipe (26). The pressure relief and vent valve (25) on the pressure relief and vent pipe (24) is arranged on the U-shaped connecting pipe (26) between the two stop valves.

4. The factory steam centralized transportation system according to claim 2, characterized in that The pressure relief and vent pipe (24) is a DN(350) steel pipe.

5. A factory steam centralized transportation system according to claim 1, characterized in that A plurality of groups of steam regulating valves (27) are provided between the first low-pressure steam boiler (3) and the steam inlet of the first pressure matcher (4) and between the second low-pressure steam boiler (7) and the steam inlet of the second pressure matcher (8).

6. The factory steam centralized transportation system according to claim 1, characterized in that The steam outlet pipes of the first pressure matcher (4) and the second pressure matcher (8) are both DN250 steel pipes.

7. A factory steam centralized transportation system according to claim 1, characterized in that The inlet end pipeline of the tee pipe (18) is a DN350 steel pipe.

8. A factory steam centralized conveying system according to claim 1, characterized in that The extraction header (9) is a DN450 steel pipe.

9. The factory steam centralized conveying system according to claim 1, characterized in that Both the first pressure matcher (4) and the second pressure matcher (8) are multi-nozzle pressure matchers.

Images