CN211781374U

CN211781374U - Solar auxiliary heating system based on biomass cogeneration unit

Info

Publication number: CN211781374U
Application number: CN201921932637.9U
Authority: CN
Inventors: 陈衡; 邸树帅; 曾宇川; 薛凯; 姚健男; 徐钢
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-10-27
Anticipated expiration: 2029-11-11

Abstract

The utility model discloses a solar energy auxiliary heating system based on living beings combined heat and power generation unit belongs to heat supply technical field. The system mainly comprises a boiler, a steam turbine system, a generator, a solar photo-thermal power generation system, a heat supply network heating system and the like. According to the system, solar energy is collected by a solar heat collector, part of heat is transferred to heat conducting oil, and the heat conducting oil enters a primary heat supply network heater to perform primary heating on heat supply network circulating water. When the water temperature at the outlet of the first-stage heat supply network heater meets the heat supply requirement, the water is directly supplied to a heat user; when the water temperature is insufficient, steam extracted by a steam turbine of the biomass power plant enters a secondary heat supply network heater to carry out secondary heating on circulating water of the heat supply network. The solar energy thermal power generation system supplies heat by using heat in the solar energy thermal power generation system, fully utilizes solar energy, does not need energy storage, and reduces the technical requirement and the manufacturing cost of the solar energy thermal power generation system; the solar energy is used for supplying heat, so that steam extraction of the steam turbine is reduced, and energy is saved.

Description

Solar auxiliary heating system based on biomass cogeneration unit

Technical Field

The utility model belongs to the technical field of the heat supply, in particular to solar energy auxiliary heating system based on living beings cogeneration units.

Background

In recent years, most of thermal power plants in coastal areas in northern China develop cogeneration to reduce power supply coal consumption. The production mode of cogeneration conforms to the principle of energy cascade utilization. In northern areas of China, the method of bulk coal burning is mostly adopted for heating in winter, the pollution is great, the efficiency is low, and the pollution problem can be effectively treated by changing the central heating mode. According to the basic concept and the thirteen-five plan of ecological civilization construction in China, the total energy consumption is controlled within 50 hundred million tons of standard coal in 2020, the total emission of pollutants such as sulfur dioxide, nitrogen oxide and the like is reduced by more than 10% compared with that in 2015, and the aim of reducing the carbon emission of single GDP by 4000-4500 on the basis of 2005 is strived. Therefore, the energy conservation and emission reduction has very important significance for the long-term development of energy and environment in China and even the world.

Solar power generation is a power generation mode using clean renewable energy, and is greatly supported by national policies. With the increasing of the proportion of renewable energy sources and the accelerated development of electrification technologies, the power industry is in the leading edge zone of energy transformation. Due to the rapid promotion of wind energy and solar energy power generation, renewable energy sources lead to global power generation. At present, the proportion of wind energy and solar energy in the total power generation is only 8%, and a large lifting space is provided. When the existing energy storage technology cannot make breakthrough progress, solar energy and heat supply are combined, and redundant solar energy is utilized to be a better direction.

The utility model discloses in, give the conduction oil with unnecessary solar energy transmission to be used for heating the heat supply network return water, make full use of this kind of clean renewable energy of solar energy, and solar photo-thermal power generation system does not need energy storage equipment, has reduced solar photo-thermal power generation system's technical demand and cost. Because the solar energy is utilized to carry out primary heating on the backwater of the heat supply network, the steam extraction quantity of the steam turbine is reduced, the energy is saved, and the energy utilization efficiency of the whole system is improved. The reference significance is provided for the construction of the solar power station in the future.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that present solar photothermal power system is insufficient to solar energy utilization and energy storage capacity is lower, give the conduction oil with unnecessary solar energy transmission for heating the heat supply network return water, make full use of this kind of clean renewable energy of solar energy, and solar photothermal power system does not need energy storage equipment, has reduced solar photothermal power system's technical demand and cost. Because the solar energy is utilized to carry out primary heating on the backwater of the heat supply network, the steam extraction quantity of the steam turbine is reduced, the energy is saved, and the energy utilization efficiency of the whole system is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a solar auxiliary heating system based on a biomass cogeneration unit mainly comprises a boiler, a steam turbine, a heat collector, a primary heat supply network heater and a secondary heat supply network heater; the system is characterized in that a boiler, a steam turbine, a condenser, a condensate pump, a heat exchanger, a deaerator and a water feeding pump are sequentially connected to form power generation steam circulation of a biomass power plant; the generator is connected with the steam turbine and converts kinetic energy into electric energy; the heat collector absorbs sunlight and transfers redundant heat to the heat conducting oil, and the heat conducting oil enters the primary heat supply network heater to heat the circulating water of the heat supply network and returns to the heat collector after releasing heat; during steam extraction of the steam turbine, one part of steam enters a deaerator, the other part of steam enters a secondary heat supply network heater to heat supply network circulating water, and drained water after heat supply returns to a condenser; the heat supply network circulating water absorbs heat from the primary heat supply network heater and the secondary heat supply network heater and then enters a heat user for heat supply, and the heat supply network circulating water after heat supply enters the primary heat supply network heater to form circulation.

When the temperature of the circulating water of the heat supply network at the outlet of the first-level heat supply network heater reaches the requirement, the circulating water is directly supplied to a heat user; when the temperature is lower, and heat consumer heat demand is big, perhaps sunshine is not enough and light heat supply network circulating water can't be used, when leading to the temperature not enough, biomass power plant steam turbine takes out partial steam and gets into the heating network circulating water that second grade heating network heater heating came out from first grade heating network heater, and the drainage after exothermic gets back to the condenser.

The utility model has the advantages of it is following and beneficial effect:

the clean renewable energy source of solar energy is fully utilized, and the solar photo-thermal power generation system does not need energy storage equipment, so that the technical requirement and the manufacturing cost of the solar photo-thermal power generation system are reduced. Because the solar energy is utilized to carry out primary heating on the backwater of the heat supply network, the steam extraction quantity of the steam turbine is reduced, the energy is saved, and the energy utilization efficiency of the whole system is improved.

Drawings

Fig. 1 is a diagram of a solar auxiliary heating system based on a biomass cogeneration unit: 1-a boiler; 2-a steam turbine; 3, a generator; 4-a condenser; 5-a condensate pump; 6-a heater; 7-a deaerator; 8-a water supply pump; 9-a secondary heat supply network heater; 10-first order heat supply network heater; 11-a heat collector;

Detailed Description

The utility model provides a solar energy auxiliary heating system based on living beings combined heat and power generation unit, do further explanation to this system theory of operation below combining the figure and the concrete implementation mode.

FIG. 1 shows a solar auxiliary heating system based on a biomass cogeneration unit

A solar auxiliary heating system based on a biomass cogeneration unit mainly comprises a boiler (1), a steam turbine (2), a heat collector (11), a primary heat supply network heater (10) and a secondary heat supply network heater (9); the system is characterized in that a boiler (1), a steam turbine (2), a condenser (4), a condensate pump (5), a heat exchanger (6), a deaerator (7) and a water feeding pump (8) are sequentially connected to form power generation steam circulation of a biomass power plant; the generator (3) is connected with the steam turbine (2) and converts kinetic energy into electric energy; the heat collector (11) absorbs sunlight and transfers redundant heat to heat-conducting oil, and the heat-conducting oil enters the primary heat supply network heater (10) to heat the circulating water of the heat supply network, releases heat and returns to the heat collector (11); in the extraction steam of the steam turbine (2), one part enters a deaerator (7), the other part enters a secondary heat supply network heater (9) to heat supply network circulating water, and the drained water after heat supply returns to a condenser (4); the heat supply network circulating water absorbs heat from the primary heat supply network heater (10) and the secondary heat supply network heater (9) and then enters a heat user for heat supply, and the heat supply network circulating water after heat supply enters the primary heat supply network heater (10) to form circulation.

When the temperature of the circulating water of the heat supply network at the outlet of the primary heat supply network heater (10) meets the requirement, the circulating water is directly supplied to a heat user; when the temperature is low, the heat demand of a heat user is high, or the sunlight is insufficient, the photo-thermal heating heat supply network circulating water cannot be used, and the water temperature is insufficient, the steam turbine (2) of the biomass power plant extracts part of steam to enter the secondary heat supply network heater (9) to heat the heat supply network circulating water coming out from the primary heat supply network heater (10), and the drained water after heat release returns to the condenser (4).

The above-mentioned embodiment is not the limit of the present invention, and the technical personnel in the technical field are in the utility model discloses a change, modification, addition or replacement that technical scheme within range made also all belong to the protection scope of the utility model.

Claims

1. A solar auxiliary heating system based on a biomass cogeneration unit mainly comprises a boiler (1), a steam turbine (2), a heat collector (11), a primary heat supply network heater (10) and a secondary heat supply network heater (9); the system is characterized in that a boiler (1), a steam turbine (2), a condenser (4), a condensate pump (5), a heat exchanger (6), a deaerator (7) and a water feeding pump (8) are sequentially connected to form power generation steam circulation of a biomass power plant; the generator (3) is connected with the steam turbine (2) and converts kinetic energy into electric energy; the heat collector (11) absorbs sunlight and transfers redundant heat to heat-conducting oil, and the heat-conducting oil enters the primary heat supply network heater (10) to heat the circulating water of the heat supply network, releases heat and returns to the heat collector (11); in the extraction steam of the steam turbine (2), one part enters a deaerator (7), the other part enters a secondary heat supply network heater (9) to heat supply network circulating water, and the drained water after heat supply returns to a condenser (4); the heat supply network circulating water absorbs heat from the primary heat supply network heater (10) and the secondary heat supply network heater (9) and then enters a heat user for heat supply, and the heat supply network circulating water after heat supply enters the primary heat supply network heater (10) to form circulation.