CN218380555U - Waste incineration power plant circulating cooling water heat comprehensive utilization system - Google Patents
Waste incineration power plant circulating cooling water heat comprehensive utilization system Download PDFInfo
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- CN218380555U CN218380555U CN202222210339.7U CN202222210339U CN218380555U CN 218380555 U CN218380555 U CN 218380555U CN 202222210339 U CN202222210339 U CN 202222210339U CN 218380555 U CN218380555 U CN 218380555U
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Abstract
The utility model belongs to the technical field of msw incineration power generation, in particular to waste incineration power plant's circulative cooling hydrothermal comprehensive utilization system. The technical scheme is as follows: a circulating cooling water heat comprehensive utilization system of a waste incineration power plant comprises a condenser, wherein a cooling water outlet of the condenser is connected with a water source heat pump through a pipeline, the other end of the water source heat pump is connected with a cooling tower system through a pipeline, the cooling tower system is connected with a cooling water circulating pump through a pipeline, and the other end of the cooling water circulating pump is connected with a cooling water inlet of the condenser through a pipeline; the water source heat pump is connected with a heat supply circulating pump through a pipeline, the other end of the heat supply circulating pump is connected with a plurality of heat supply units which are connected in parallel, and the other ends of the heat supply units are converged and then connected to the heat supply circulating pump through the pipeline. The utility model provides a make full use of recirculated cooling water thermal waste incineration power plant recirculated cooling water heat comprehensive utilization system.
Description
Technical Field
The utility model belongs to the technical field of msw incineration power generation, in particular to waste incineration power plant's circulative cooling hydrothermal comprehensive utilization system.
Background
Waste incineration power generation belongs to thermal power generation, and a condenser is cooled by a cooling tower system to maintain normal thermodynamic cycle. The utility model discloses mainly carry out the comprehensive utilization to the circulative cooling water heat dissipation among the thermal power system, the heat that the circulative cooling water evaporation was taken away accounts for whole thermodynamic system thermal 35% ~ 45%, and the heat is huge. Because the temperature of the circulating cooling water is generally 30-40 ℃, the heat of the circulating cooling water is not effectively utilized by the existing garbage power plant process, and the circulating cooling water is exhausted to the atmospheric environment through a mechanical cooling tower system or a natural ventilation cooling tower system, so that energy waste is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model aims to provide a circulating cooling water heat comprehensive utilization system of a waste incineration power plant which makes full use of circulating cooling water heat.
The utility model discloses the technical scheme who adopts does:
a circulating cooling water heat comprehensive utilization system of a waste incineration power plant comprises a condenser, wherein a cooling water outlet of the condenser is connected with a water source heat pump through a pipeline, the other end of the water source heat pump is connected with a cooling tower system through a pipeline, the cooling tower system is connected with a cooling water circulating pump through a pipeline, and the other end of the cooling water circulating pump is connected with a cooling water inlet of the condenser through a pipeline; the water source heat pump is connected with a heat supply circulating pump through a pipeline, the other end of the heat supply circulating pump is connected with a plurality of heat supply units which are connected in parallel, and the other ends of the heat supply units are collected and then connected to the heat supply circulating pump through a pipeline.
The utility model discloses let in water source heat pump with exhaust recirculated cooling water in the condenser, draw out the heat high efficiency in the recirculated water. The circulating cooling water in the water source heat pump exchanges heat with external water, so that the heated external water is used for building heating, domestic water, production raw water heating, heating demineralized water and the like. The utility model discloses utilize the low-grade heat of water source heat pump circulation cold water to the condenser to carry out "promotion", make it can satisfy the demand of required heat "quality" in power plant's daily production, the life, reduced the use of electric power and the heat dissipation of power plant, the energy saving effectively, reduce the station service electricity, improve the hot comprehensive utilization of power plant.
As the preferred scheme of the utility model, the heating unit is including the heating equipment who is used for building heating. The heated outside water can be delivered to a heating facility at a heat energy utilization point for building heating.
As the preferable scheme of the utility model, the heat supply unit includes domestic water equipment. The heated external water can be delivered to domestic water equipment, and hot water with the temperature of 40-50 ℃ is generated by heat exchange for daily life.
As the preferred scheme of the utility model, the heat supply unit is including the former water tank that is used for heating the raw water that gets into thermodynamic system. The heated external water can be conveyed to the raw water tank for heating the raw water to about 25 ℃, so that the membrane flux is improved, the service life is prolonged, and the water temperature entering a thermodynamic system is improved. Generally, northern surface water is about 5 ℃ in winter, and the use of steam for heating raw water can be reduced by heating the raw water, so that the heat utilization rate of a power plant is integrally improved.
As the preferred scheme of the utility model, the heat supply unit includes the demineralized water tank. The outside water of heating can be carried to the demineralized water tank, makes the demineralized water of 25 ℃ further heat to 45 ℃ originally, improves the oxygen-eliminating device feedwater temperature, reduces the steam consumption of oxygen-eliminating device, can improve the comprehensive heat utilization ratio of power plant.
As the utility model discloses an optimal scheme, be provided with the frequency conversion fan that is used for cooling down to the circulating water on the cooling tower system. The variable frequency fan can cool the circulating cooling water in the cooling tower system, and the return water temperature of the condenser is ensured to meet the process requirements of the power generation system.
As the utility model discloses an optimal scheme, all be provided with temperature sensor on cooling tower system and the cooling water circulating pump, temperature sensor is connected with the frequency conversion fan electricity. The utility model discloses being provided with temperature sensor at cooling tower system, cooling water circulating pump export, setting up the frequency conversion fan at the cooling tower system simultaneously, the frequency conversion fan is according to the temperature sensor feedback temperature adjustment air volume that cooling tower system, cooling water circulating pump export were established, ensures that the return water temperature of condenser satisfies power generation system's technological requirement.
As the preferred scheme of the utility model, the cooling tower system includes the cooling tower, is provided with the pond under the cooling tower.
The utility model has the advantages that:
the utility model discloses let in water source heat pump with exhaust recirculated cooling water in the condenser, draw out the heat high efficiency in the recirculated water. The circulating cooling water in the water source heat pump exchanges heat with external water, so that the heated external water is used for heating buildings, domestic water, raw water for production, heating demineralized water and the like. The utility model discloses utilize the low-grade heat of water source heat pump to the cold water of circulation of condenser to carry out "promotion", make it can satisfy the demand of required heat "quality" in power plant's daily production, the life, reduced the use of electric power and the heat dissipation of power plant, the energy saving effectively, reduce the station service power, improve the heat comprehensive utilization of power plant.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a condenser; 2-water source heat pump; 3-a cooling tower system; 4-cooling water circulating pump; 5-heat supply circulating pump; 61-heating equipment; 62-domestic water equipment; 63-raw water tank; 64-demineralized water tank.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, the circulating cooling water heat comprehensive utilization system of the refuse incineration power plant of the embodiment includes a condenser 1, a cooling water outlet of the condenser 1 is connected with a water source heat pump 2 through a pipeline, the other end of the water source heat pump 2 is connected with a cooling tower system 3 through a pipeline, the cooling tower system 3 is connected with a cooling water circulating pump 4 through a pipeline, and the other end of the cooling water circulating pump 4 is connected with a cooling water inlet of the condenser 1 through a pipeline; the water source heat pump 2 is connected with a heat supply circulating pump 5 through a pipeline, the other end of the heat supply circulating pump 5 is connected with a plurality of heat supply units which are connected in parallel, and the other ends of the heat supply units are collected and then connected to the heat supply circulating pump 5 through a pipeline. Wherein, cooling tower system 3 includes the cooling tower, is provided with the pond under the cooling tower.
The utility model discloses utilize condenser 1's cooling water as water source heat pump 2's heat source, the cooling water behind the water source heat pump 2 extraction heat gets into cooling tower system 3, is getting into condenser 1 through 4 pressurizations of cooling water circulating pump. In the process, the water source heat pump 2 is driven by electric power, can obtain 5-7 times of heat energy input, and generates hot water at about 55-60 ℃ for producing domestic water.
The utility model discloses let in water source heat pump 2 with exhaust recirculated cooling water in condenser 1, draw out the heat high efficiency in the recirculated water. The circulating cooling water in the water source heat pump 2 exchanges heat with external water, and the heated external water is used for heating buildings, domestic water, raw water for production, heating demineralized water and the like. The utility model discloses utilize water source heat pump 2 to carry out "promotion" to the low-grade heat of the cold water of circulation of condenser 1, make it can satisfy the demand of required heat "quality" in power plant's daily production, the life, reduced the use of electric power and the heat dissipation of power plant, energy saving effectively, reduction station service power improves the heat comprehensive utilization of power plant.
It should be noted that the heat supply circulation pump 5 may also be arranged on the return pipe between the plurality of heat supply units and the water source heat pump 2.
The heating unit comprises heating equipment 61 for building heating, domestic water equipment 62, a raw water tank 63 for heating raw water entering a thermodynamic system, and a demineralized water tank 64, wherein the heating equipment 61, the domestic water equipment 62, the raw water tank 63 and the demineralized water tank 64 are connected in parallel. The heated outside water can be supplied to the heating facility 61 of the thermal energy utilization point for building heating. The heated external water can be delivered to the domestic water equipment 62, and heat exchange is carried out to generate hot water with the temperature of 40-50 ℃ for daily life. The heated external water can be delivered to the raw water tank 63 for heating the raw water to about 25 ℃, so that the membrane flux is improved, the service life is prolonged, and the temperature of the water entering the thermodynamic system is improved. Generally, northern surface water is about 5 ℃ in winter, and the use of steam for heating raw water can be reduced by heating the raw water, so that the heat utilization rate of a power plant is integrally improved. The outside water of heating can be carried to demineralized water tank 64, makes the demineralized water of 25 ℃ further heat to 45 ℃ originally, improves the oxygen-eliminating device feedwater temperature, reduces the steam consumption of oxygen-eliminating device, can improve the comprehensive heat utilization ratio of power plant.
The utility model discloses a 2 techniques of water source heat pump to the recirculated cooling water is as the heat source, draws out the heating, the domestic water that are used for the factory building with the heat high efficiency in the recirculated water, reduces the power consumptive of the original air conditioner in factory, water heater. In addition, the heat extracted by the water source heat pump 2 can be used for heating raw water, the temperature of the raw water is increased, the membrane flux of the demineralized water system is enhanced, the osmotic membrane is in the optimal temperature working environment, the water outlet temperature of the demineralized water is increased, and the steam consumption of the deaerator is reduced.
In order to accurately control the temperature of return water entering the condenser 1, a variable frequency fan for cooling circulating water is arranged on the cooling tower system 3; and temperature sensors are arranged on the cooling tower system 3 and the cooling water circulating pump 4 and are electrically connected with the variable frequency fan. The utility model discloses be provided with temperature sensor in cooling tower system 3, 4 exports of cooling water circulating pump, set up the frequency conversion fan at cooling tower system 3 simultaneously, the frequency conversion fan is according to the temperature sensor feedback temperature adjustment air volume that cooling tower system 3, 4 exports of cooling water circulating pump were established, ensures that condenser 1's return water temperature satisfies power generation system's technological requirement.
The utility model discloses mainly the hot quality from recirculated cooling water is lower, combines the production of rubbish power plant, to the demand condition of low-grade heat in the life, and this part used heat of comprehensive utilization turns into the demand heat source of power plant. The utility model can solve the heat loss of the cooling circulating water and improve the heat utilization rate of the power plant; the steam demand of the deaerator and the raw water heating steam demand are saved, the output of the boiler is improved, and the system generating capacity is increased; the power consumption of heating and domestic hot water is reduced, and the comprehensive power consumption rate of a power plant is reduced.
Example (b):
in general, the circulating water of the condenser 1 has an outlet temperature of 37 ℃ and a return temperature of 32 ℃. The water outlet temperature of the water source heat pump 2 is 50-60 ℃, and the temperature can meet the temperature requirement of building heating. The temperature of the domestic water is generally 40-45 ℃, and the domestic water is mainly used for washing hands, bathing and the like. The optimal membrane flux water temperature of raw water is 25 ℃, but the surface water inlet temperature in general winter is about 5 ℃, and steam heating is needed. The water outlet of the water source heat pump at 250-60 ℃ can be utilized to heat the raw water by arranging a heat exchanger in the raw water tank 63, so that the temperature of the raw water reaches the process requirement.
Take a garbage incineration line power plant with loading machine of 750t/d of 1 × 18MW as an example. The calorific value of the garbage is 7100kJ/kg, and the total heat generated by the incineration of the garbage in the whole plant is 221.88GJ. The water amount (annual average day) of the circulating cooling water generated by the whole plant is 4200t/h, and according to the temperature difference of 5 ℃, the heat required to be dissipated is 88.2GJ/h, which accounts for 39.6 percent of the total heat. The building heating area of the power plant is calculated according to 10000 square meters, and the unit heat load is calculated according to 100 w/square meter, so that the heat quantity is required to be 3.6GJ per hour. The water supplement amount of the boiler is 8t/h, and if the surface water temperature is 5 ℃, the heating to 25 ℃ needs 0.672GJ/h of heat; the heat required for heating the desalted water from 25 ℃ to 45 ℃ is 0.672GJ/h. Domestic water is determined according to 60 persons, each person needs 6t/d of hot water when the hot water is 100L per day, and the heat is 0.042GJ/h when the temperature of surface water is increased to 45 ℃, but the domestic water is generally concentrated and the heat consumption is high in a short time, and the calculation is calculated according to a 24-hour mean value. The total required heat quantity is as follows:
3.6+0.672+0.672+0.042＝4.986GJ。
to sum up, utilize the utility model discloses can improve the comprehensive heat utilization rate 2.24% of rubbish power plant's whole factory, retrieve heat loss 5.65%, can reduce the factory power rate, synthesize the rising of heat utilization rate and just can bring corresponding electricity generation income to the power plant, can also reduce the unnecessary carbon emission simultaneously.
According to the 750t/d waste incineration line as an example, the power of the water source heat pump 2 is 1385kW according to the heat of 4.986GJ/h, and the investment is increased by about 70 ten thousand yuan according to the price of 20.5 yuan/W of the current water source heat pump.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (8)
1. The utility model provides a refuse incineration power plant circulative cooling hydrothermal comprehensive utilization system which characterized in that: the system comprises a condenser (1), wherein a cooling water outlet of the condenser (1) is connected with a water source heat pump (2) through a pipeline, the other end of the water source heat pump (2) is connected with a cooling tower system (3) through a pipeline, the cooling tower system (3) is connected with a cooling water circulating pump (4) through a pipeline, and the other end of the cooling water circulating pump (4) is connected with a cooling water inlet of the condenser (1) through a pipeline; the water source heat pump (2) is connected with a heat supply circulating pump (5) through a pipeline, the other end of the heat supply circulating pump (5) is connected with a plurality of heat supply units which are connected in parallel, and the other ends of the heat supply units are collected and then connected to the heat supply circulating pump (5) through a pipeline.
2. The waste incineration power plant circulating cooling water heat comprehensive utilization system according to claim 1, characterized in that: the heating unit comprises a heating device (61) for heating a building.
3. The waste incineration power plant circulating cooling water heat comprehensive utilization system according to claim 1, characterized in that: the heating unit comprises a domestic water appliance (62).
4. The waste incineration power plant circulating cooling water heat comprehensive utilization system according to claim 1, characterized in that: the heat supply unit includes a raw water tank (63) for heating raw water entering the thermodynamic system.
5. The circulating cooling water heat comprehensive utilization system of the waste incineration power plant according to claim 1, characterized in that: the heat supply unit includes a demineralized water tank (64).
6. The waste incineration power plant circulating cooling water heat comprehensive utilization system according to claim 1, characterized in that: and a variable frequency fan used for cooling the circulating water is arranged on the cooling tower system (3).
7. The waste incineration power plant circulating cooling water heat comprehensive utilization system according to claim 6, characterized in that: and temperature sensors are arranged on the cooling tower system (3) and the cooling water circulating pump (4) and are electrically connected with the variable frequency fan.
8. The circulating cooling water heat comprehensive utilization system of the waste incineration power plant according to any one of claims 1 to 7, characterized in that: the cooling tower system (3) comprises a cooling tower, and a water pool is arranged below the cooling tower.
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| CN202222210339.7U CN218380555U (en) | 2022-08-22 | 2022-08-22 | Waste incineration power plant circulating cooling water heat comprehensive utilization system |
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| CN202222210339.7U CN218380555U (en) | 2022-08-22 | 2022-08-22 | Waste incineration power plant circulating cooling water heat comprehensive utilization system |
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