CN204003103U - A kind of distributed energy supply equipment that adopts rock gas and solar association circulation - Google Patents

Abstract

The utility model provides a distributed energy supply device adopting natural gas and solar energy combined cycle, which comprises a natural gas combustion flue gas circulation unit, a water vapor circulation unit and an organic working medium circulation unit; a natural gas combustion flue gas circulation unit and a water vapor circulation unit Connected, the steam circulation unit is also connected with the organic working medium circulation unit. The equipment uses natural gas and solar energy to carry out a combined cycle, reducing the use of gas and improving the utilization rate of solar energy; the energy supply system is established by using the combined cycle of water vapor and organic working fluid to realize the cascade utilization of energy.

Description

A distributed energy supply device using natural gas and solar combined cycle

technical field

The utility model relates to the field of natural gas distributed energy and solar thermal energy, in particular to a combined cycle device and method for natural gas distributed (gas turbine or gas internal combustion engine) energy and solar thermal energy.

Background technique

Gas distributed energy is based on cogeneration technology of heat, power and cooling, connected to large power grids and natural gas pipeline networks, and provides energy services such as electricity, steam, hot water and air-conditioning cold water (or wind) to users in a certain area at the same time. . It is a clean, efficient, small-scale and decentralized second-generation energy technology developed abroad in the 1970s. Because of its flexible load changes, low initial investment, reliable power supply performance, small transmission loss, environmental protection and cleanliness, it has attracted more and more attention in the world's energy field.

Solar energy is an inexhaustible and inexhaustible clean and healthy energy for the earth. It is an alternative energy source with the broadest application prospects. , mitigation of climate change, etc., are of great significance.

Due to the disadvantages of solar heat utilization equipment and technology applications, such as being unavailable in the absence of sunshine and cold weather, they cannot meet the needs of continuous heating for buildings; and the current gas price is high, and the operating cost of triple power supply is relatively high. Therefore, how to establish a combined cycle of natural gas and solar energy to realize cascade utilization of energy, reduce the use of gas, and improve the utilization rate of solar energy. become an urgent problem to be solved.

Contents of the invention

The technical problem to be solved by the utility model is: to provide a distributed energy supply equipment using natural gas and solar energy combined cycle, which uses natural gas and solar energy to carry out combined cycle, reduces the use of gas, improves the utilization rate of solar energy, and uses water vapor Establish an energy supply system with the combined cycle of organic working fluid to realize cascade utilization of energy.

The technical solution adopted by the utility model is: a distributed energy supply equipment using natural gas and solar energy combined cycle, including natural gas combustion flue gas circulation unit, water vapor circulation unit and organic working medium circulation unit; natural gas combustion flue gas circulation unit It is connected with the water vapor circulation unit, and the water vapor circulation unit is also connected with the organic working medium circulation unit.

Said equipment, the natural gas combustion flue gas circulation unit includes a combustor, a gas turbine, a waste heat recovery device and a flow distribution device connected in sequence, and the flow distribution device is also connected to the smoke exhaust device through a heating device and a refrigeration device; the waste heat recovery device is also connected to the water vapor The circulation units are connected, and the gas turbine is also connected with the first generator.

Said equipment, the steam circulation unit includes a steam turbine, a heat exchanger, a booster pump, a deaerator and a solar heat collector connected in sequence, the outlet of the solar heat collector is also connected with the waste heat recovery device, and the steam turbine is connected to There is a second generator; the heat exchanger is also connected with the organic working medium circulation unit.

In the described equipment, the organic working medium circulation unit includes an organic turbine, a condenser, and an organic working medium booster pump connected in sequence, and the organic working medium booster pump is also connected with the organic turbine through a heat exchanger, and the organic working medium booster pump is connected to the organic turbine through a heat exchanger. There is also a third generator.

Said equipment, the solar heat collector includes a solar composite parabolic heat collector vacuum tube for generating high temperature steam, and the vacuum tube has a metal-coated layer and metal fins.

Advantage of the utility model:

1. Use natural gas and solar energy to carry out combined cycle, reduce the use of gas, and improve the utilization rate of solar energy;

2. Establish an energy supply system with a combined cycle of water vapor and organic working fluid to realize cascade utilization of energy.

Description of drawings

Fig. 1 is a system structure diagram of the present utility model (taking a gas turbine as an example);

Fig. 2 is the flow chart of energy cascade utilization of the present utility model;

In the figure: 1-combustion chamber; 2-gas turbine; 3-generator 1; 4-waste heat recovery device; 5-distribution device; 6-heating device; 7-refrigeration device; ;10-generator 2; 11-heat exchanger; 12-boost pump; 13-deaerator; 14-solar collector; 15-organic turbine; 16-generator 3; 17-condenser; 18-Organic working fluid booster pump.

Detailed ways

The utility model studies the use of natural gas and solar energy as energy sources, and establishes an energy supply system based on combined cycle of water vapor and organic working fluid. Low-carbon development mode; the working medium adopts water vapor and organic working medium for combined cycle, water vapor contains a large amount of latent heat of gasification, and organic working medium may make better use of the latent heat of vaporization of water vapor, which has great potential in the cascade utilization of combined cycle energy Significance.

A combined cycle of natural gas and solar energy is composed of a flue gas cycle, a water vapor cycle, and an organic working fluid cycle, wherein the flue gas cycle is composed of a compressor, a combustion chamber, a gas turbine, a generator 1, a waste heat recovery device, and a flow splitter , heating device, refrigeration device, and smoke exhaust device; the water vapor cycle is composed of steam turbine, generator 2, heat exchanger, booster pump, deaerator, solar collector, and waste heat recovery device; organic working fluid The cycle is composed of an organic turbine, a generator 3, a condenser, and an organic working fluid booster pump.

The waste heat recovery device in the steam cycle can properly distribute the heat of the flue gas entering the split device according to the heat collection of the solar collector; the solar CPC (composite parabolic collector) vacuum tube used to generate high-temperature steam has a coating Metal layers and metal fins.

The utility model relates to a combined cycle of natural gas and solar energy, in particular to a combined cycle device and method of natural gas distributed (gas turbine or gas internal combustion engine) energy and solar photothermal, which includes flue gas circulation, water vapor circulation, The cycle of organic working medium is as follows:

1. Flue gas circulation of natural gas combustion: gas enters the combustion chamber, becomes high-temperature and high-pressure flue gas through combustion, drives the gas turbine to generate electricity, and the exhaust gas enters the waste heat recovery device, and part of it enters the shunt device to provide heat for the heating device and refrigeration device;

2. Water vapor cycle: the water that has been boosted and deoxygenated is heated by the solar collector, and then enters the waste heat recovery device to exchange heat with the exhaust gas of the gas turbine to increase the temperature of the water vapor so that it reaches a superheated state. The steam enters the steam turbine for power generation, and the tail gas of the power generation enters the heat exchanger;

3. Organic working medium circulation: Utilize the characteristics that organic working medium can be quickly gasified at low temperature and low pressure, absorb the heat of the heat exchanger, vaporize the organic working medium, and enter the organic turbine (organic working medium steam turbine) to drive the generator To generate electricity, the tail gas enters the condenser.

The utility model aims at the disadvantages of the existing "solar heat utilization equipment and technology application that cannot be used when there is no sunshine and cold weather, and cannot meet the demand for continuous heating of buildings; and the current gas price is relatively high, and the operating cost of triple supply is relatively high" To solve the problem, establish a combined cycle of natural gas and solar energy, use natural gas and solar energy for combined cycle, reduce the use of gas, improve the utilization rate of solar energy, establish an energy supply system with combined cycle of water vapor and organic working fluid, and realize cascade utilization of energy.

The utility model patent will be described in further detail below through the description of specific embodiments, but this cannot be used to limit the protection scope of the utility model patent. Those skilled in the art can make various modifications or changes according to the basic idea of the utility model patent Improvement, but as long as it does not depart from the basic idea of the utility model patent, it is within the scope of the utility model patent.

The utility model will be further described in conjunction with the accompanying drawings.

As shown in Figure 1, the utility model consists of natural gas combustion flue gas circulation, water vapor circulation, and organic working medium circulation. Natural gas enters the combustion chamber, and after combustion, it becomes high-temperature and high-pressure flue gas, which enters the gas turbine for power generation, and the tail gas of power generation enters waste heat recovery. Part of the waste heat enters the split device along the flue gas circulation to provide cooling and heat, and the tail gas is discharged through the smoke exhaust device; the other part of the waste heat heats the water vapor generated by the solar collector in the water steam cycle unit, and the superheated steam enters the steam turbine to generate electricity ; The exhaust gas enters the heat exchanger and exchanges heat with the organic working medium circulating working medium. The organic working medium is gasified in the heat exchanger and enters the organic turbine for power generation, and the tail gas enters the condenser.

Among them, the natural gas combustion flue gas cycle is composed of a compressor, a combustion chamber, a gas turbine, a generator 1, a waste heat recovery device, a splitter device, a heat exchanger, a refrigeration device, and a smoke exhaust device; the water vapor cycle is composed of a steam turbine, a generator 2 , heat exchanger, booster pump, deaerator, solar collector, and waste heat recovery device; the organic working medium cycle is composed of an organic turbine, generator 3, condenser, and organic working medium booster pump. The waste heat recovery device in the steam cycle can properly distribute the heat of the flue gas entering the split device according to the heat collection of the solar collector.

Form a thermal system that uses gas and solar energy as energy sources, combustion chambers and solar thermal collectors as energy systems, and uses flue gas circulation, steam circulation, and organic working fluid circulation to realize energy cascade utilization. Gas turbines, steam turbines, organic turbines For the power system, it provides power for the generator, and provides cooling and heat requirements for the outside world with the flue gas refrigerator and heating device.

Claims (5)

1. A distributed energy supply device using natural gas and solar energy combined cycle, characterized in that: it includes a natural gas combustion flue gas circulation unit, a water vapor circulation unit and an organic working medium circulation unit; a natural gas combustion flue gas circulation unit and a water vapor cycle The unit is connected, and the steam circulation unit is also connected with the organic working medium circulation unit. 2. The equipment according to claim 1, characterized in that: the natural gas combustion flue gas circulation unit comprises a combustor (1), a gas turbine (2), a waste heat recovery device (4) and a flow splitter (5) connected in sequence, and the flow split The device (5) is also connected to the smoke exhaust device (8) through the heating device (6) and the refrigeration device (7); the waste heat recovery device (4) is also connected to the water vapor circulation unit, and the gas turbine (2) is also connected to A generator (3). 3. The device according to claim 2, characterized in that: the steam cycle unit comprises a steam turbine (9), a heat exchanger (11), a booster pump (12), a deaerator (13) and The solar heat collector (14), the outlet of the solar heat collector (14) is also connected with the waste heat recovery device (4), and the steam turbine (9) is connected with the second generator (10); the heat exchanger (11) also It is connected with the organic working fluid circulation unit. 4. The device according to claim 3, characterized in that: the organic working medium circulation unit comprises an organic turbine (15), a condenser (17) and an organic working medium booster pump (18) connected in sequence, and the organic working medium The mass booster pump (18) is also connected to the organic turbine (15) through a heat exchanger (11), and the organic turbine (15) is also connected with a third generator (16). 5. The device according to claim 3, characterized in that: the solar collector (14) comprises a solar composite parabolic collector vacuum tube for generating high temperature steam, and the vacuum tube has a metallized layer and metal fins .