CN202141024U - Integrated device for auxiliary steam system of solar and coal-fired thermal power plants - Google Patents

Abstract

The utility model discloses an integrated device of solar energy and auxiliary steam system of a coal-fired thermal power plant, which belongs to the field of solar heat utilization. In this device, the steam outlet of the solar heat collecting steam generator is connected with the inlet of the auxiliary steam header of the auxiliary steam system of the thermal power plant through the temperature reduction and pressure reducing valve and the automatic regulating valve, and the outlet of the auxiliary steam header is passed through the solar heat collecting steam generator The drain valve is connected to the drain inlet of the solar collector steam generator, and the outlet and inlet of the auxiliary steam header are respectively connected to the valve of the original auxiliary steam source pipeline and the drain valve of the auxiliary steam header. The utility model can solve the problems of high energy consumption, environmental pollution, and instability and discontinuity in solar thermal power generation in coal-fired thermal power plants, and can be used to transform the auxiliary steam system of traditional coal-fired thermal power plants.

Description

Integrated device for auxiliary steam system of solar and coal-fired thermal power plants

technical field

The utility model belongs to the field of solar heat utilization, in particular to an integrated device of solar energy and auxiliary steam system of a coal-fired thermal power plant.

Background technique

The "Twelfth Five-Year Plan" outline proposes to promote the reform of energy production and utilization, build a safe, stable, economical and clean modern energy industry system, accelerate the development of new energy, and promote the clean and efficient use of traditional energy. As a large coal-consuming coal-fired power plant in my country, it is not only a secondary energy production industry, but also a major consumer of primary energy. Thermal power plants have problems such as high energy consumption and environmental pollution. To achieve high performance, low energy consumption, and low pollution operation of thermal power units, a multi-energy utilization system that complements traditional coal-fired thermal power with new energy can be considered.

As an inexhaustible, inexhaustible and renewable clean energy, solar energy is mostly used with the heat generated by it as the carrier of intermediate energy, so as to obtain a certain fluid temperature, such as medium and high temperature solar steam. However, there are problems affected by weather and seasons in the utilization of solar energy.

In the way of solar concentrated heat utilization, the steam quality produced by the trough solar collector is the closest to the steam used in the auxiliary steam system of thermal power plants. The introduction of new energy types of solar energy into the auxiliary steam system of traditional coal-fired thermal power plants not only proposes new ideas for energy-saving transformation of thermal power plants, but also enables large-scale utilization of solar energy, reduces emissions of various pollutants and greenhouse gases, and overcomes the Changes lead to intermittent solar energy rather than continuous, stable power generation and other deficiencies.

Utility model content

The purpose of this utility model is to provide a solar energy and coal-fired power plant auxiliary steam system integrated device in order to solve the problems of high energy consumption, polluted environment, and instability and discontinuity in solar thermal power generation. .

An integrated device for the auxiliary steam system of solar and coal-fired thermal power plants. The inlet of the auxiliary steam header of the auxiliary steam system of the power plant, the outlet of the auxiliary steam header is connected to the drain inlet of the solar collector steam generator through the steam trap valve of the solar collector steam generator, and the inlet of the auxiliary steam header is also connected to the original auxiliary steam The outlet of the steam source pipeline valve is connected, the outlet of the auxiliary steam header is also connected with the inlet of the auxiliary steam header drain valve, the outlet of the auxiliary steam header drain valve is connected to the inlet of the condenser drain collector of the thermal power plant, and the auxiliary steam header The steam outlet of the box is connected to the auxiliary steam user.

The solar collector steam generator is usually a trough solar collector.

The solar heat collecting steam generator is equipped with a solar pyranometer.

The working principle is: when the solar radiation is sufficient, the original auxiliary steam source of the thermal power plant is cut off, and the steam generated by the solar collector steam generator is used as the auxiliary steam source to supply the auxiliary steam header. When the solar radiation is insufficient, by simultaneously adjusting the solar heat collecting steam generator and the original auxiliary steam source, the complementary operation of the two is realized to supply the auxiliary steam header. At night or when the solar collector fails, switch back to the original auxiliary steam source of the thermal power plant and return to the original thermal power generation condition.

The beneficial effects of the utility model are: the utility model adopts the auxiliary steam system combining the solar heat collecting steam generator and the auxiliary steam source of the thermal power plant, and solves the gap caused by the solar thermal power generation mode directly depending on the season and the weather and instability problems; eliminating the need to build large-scale solar heat storage facilities, saving investment. This method also makes full use of the advantages of conventional coal-fired thermal power generation such as low cost and high power, complements the advantages of solar energy, realizes the complementary operation of traditional coal-fired thermal power and solar energy, and provides a new idea for the energy-saving transformation of traditional coal-fired thermal power plants.

Description of drawings

Figure 1 is a schematic diagram of an integrated device for auxiliary steam systems in solar and coal-fired thermal power plants, where the dotted line represents the drain pipeline.

Labels in the figure: 1—auxiliary steam header, 2—auxiliary steam user, 3—auxiliary steam header drain valve, 4—condenser drain collector inlet, 5—solar collector steam generator drain Valve, 6—solar heat collecting steam generator, 7—solar pyranometer, 8—temperature and pressure reducing valve, 9—automatic adjustment valve, 10—auxiliary steam source pipeline valve.

Detailed ways

The following examples can enable those skilled in the art to understand the utility model more comprehensively, but do not limit the utility model in any way.

Example 1:

As shown in Figure 1, the integrated device for the auxiliary steam system of solar energy and coal-fired thermal power plants, the device includes auxiliary steam header 1, auxiliary steam header drain valve 3, solar thermal collector steam generator drain valve 5, solar thermal collector steam generator 6. Temperature and pressure reduction valve 8, automatic adjustment valve 9 and auxiliary steam source pipeline valve 10, the steam outlet of solar heat collecting steam generator 6 is connected to the inlet of temperature and pressure reduction valve 8, temperature and pressure reduction valve 8 The outlet of the automatic adjustment valve 9 is connected to the inlet of the automatic adjustment valve 9, and the outlet of the automatic adjustment valve 9 and the outlet of the original auxiliary steam source pipeline valve 10 of the thermal power plant are connected to the inlet of the auxiliary steam header 1 of the auxiliary steam system of the thermal power plant, and the auxiliary steam header The outlet of box 1 is connected to the inlet of steam trap valve 5 of the solar collector steam generator and the inlet of drain valve 3 of the auxiliary steam header, and the outlet of drain valve 5 of the solar collector steam generator is connected to the drain valve of solar collector steam generator 6 The inlet and the outlet of the auxiliary steam header drain valve 3 are connected to the inlet 4 of the steam collector of the thermal power plant condenser, and the steam outlet of the auxiliary steam header 1 is connected to the auxiliary steam user 2. The pyranometer 7 is installed on the solar heat collecting steam generator 6 .

In this embodiment, the solar collector steam generator 6 is a commercially available trough solar collector, and the temperature range of the steam generated is 300-400°C.

The working principle of this embodiment:

When the solar radiation measured by the solar pyranometer 7 meets a given requirement, the auxiliary steam source pipeline valve 10 and the auxiliary steam header drain valve 3 are automatically closed. The automatic regulating valve 9 on the pipeline between the solar heat collecting steam generator 6 and the auxiliary steam header 1 is automatically opened, and the steam generated by the solar heat collecting steam generator 6 passes through the temperature and pressure reducing valve 8 and the automatic regulating valve 9 from its outlet The auxiliary steam header 1 is input, and the temperature and pressure reduction valve 8 automatically adjusts the steam parameters generated by the solar heat collecting steam generator 6 to be basically consistent with the steam parameters required by the auxiliary steam header 1. The steam condensed by the auxiliary steam header 1 enters the solar thermal steam generator 6 through the opened solar thermal steam generator steam trap valve 5 and continues to be heated to generate steam, and the cycle is repeated.

When it is cloudy and rainy, the solar radiation measured by the solar pyranometer 7 does not meet the given requirements, and the automatic adjustment valve 9 and the steam trap valve 5 of the solar heat collecting steam generator are automatically adjusted to a smaller value, and the auxiliary steam source pipeline valve 10 and the auxiliary steam connection The tank trap valve 3 is automatically adjusted to make the steam in the auxiliary steam header 1 meet the steam consumption requirements of the auxiliary steam user 2, thereby realizing complementary auxiliary operation of solar energy and traditional coal combustion. Due to the reduction of auxiliary steam source steam, the working capacity of the steam turbine is enhanced, and the coal consumption of power generation will be significantly reduced.

When reason such as night or solar heat collector failure solar heat collecting steam generator 6 can't produce steam, now solar radiation meter 7 records solar radiation and is zero, automatic adjustment valve 9 and solar collecting steam generator drain valve 5 automatically Close, the original auxiliary steam source pipeline valve 10 and the auxiliary steam header drain valve 3 are automatically opened, and the system returns to the original thermal power generation working condition.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (3)

1. A solar energy and coal-fired thermal power plant auxiliary steam system integrated device is characterized in that: the device includes an auxiliary steam header (1) and a solar heat collecting steam generator (6), a solar heat collecting steam generator (6 ) steam outlet is connected to the inlet of the auxiliary steam header (1) of the auxiliary steam system of the thermal power plant through the temperature and pressure reducing valve (8) and the automatic adjustment valve (9), and the outlet of the auxiliary steam header (1) is passed through the solar heat collecting steam The generator drain valve (5) is connected to the drain inlet of the solar collector steam generator (6), and the inlet of the auxiliary steam header (1) is also connected to the outlet of the original auxiliary steam source pipeline valve (10) of the thermal power plant. The outlet of the auxiliary steam header (1) is also connected to the inlet of the auxiliary steam header drain valve (3), and the outlet of the auxiliary steam header drain valve (3) is connected to the inlet (4) of the condenser drain collector of the thermal power plant, The steam outlet of the auxiliary steam header (1) is connected to the auxiliary steam user (2). 2. The device according to claim 1, characterized in that: the solar heat collecting steam generator (6) is a trough solar heat collector. 3. The device according to claim 1, characterized in that: said solar heat collecting steam generator (6) is equipped with a solar pyranometer (7).

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