CN205477791U - Low -grade waste heat energy supply system of industry - Google Patents

Low -grade waste heat energy supply system of industry Download PDF

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CN205477791U
CN205477791U CN201521092789.4U CN201521092789U CN205477791U CN 205477791 U CN205477791 U CN 205477791U CN 201521092789 U CN201521092789 U CN 201521092789U CN 205477791 U CN205477791 U CN 205477791U
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heat
subsystem
water
supply
waste heat
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邓毕力
许明超
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Liming Beijing Energy Saving Technology Co ltd
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Liming Beijing Energy Saving Technology Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

The utility model relates to a low -grade waste heat energy supply system of industry, including waste heat acquisition subsystem, energy station subsystem, heat supply subsystem, organic rankine cycle power generation subsystem and life hot water supply subsystem. This department is all to be crossed the low -grade residual heat resources of waste heat acquisition subsystem in to the industrial enterprise production process and carries out comprehensive recovery, it stores up and optimizes and distribute the heat supply subsystem to make the waste heat concentrate in the energy station subsystem, in organic rankine cycle power generation subsystem and the life hot water supply subsystem, satisfy town dweller and industrial enterprise's heating, power consumption and life hot water etc. Are multiple with the ability demand, form the energy supply system, realize the comprehensive recovery utilization of low -grade waste heat high efficiency and scale in the whole year.

Description

Industry low grade residual heat energy supply system
Technical field
This utility model belongs to energy-conserving and environment-protective technical field, particularly to a kind of industry low grade residual heat energy supply system.
Background technology
Industrial processes need to consume the substantial amounts of energy, and in the technological process of production, produces substantial amounts of waste heat.Continuous propelling along with China's industrial energy saving work, the industrial exhaust heat of middle GOOD TASTE has been obtained for the most effectively utilizing at present, but the liquid of such as less than 100 DEG C, the industry low grade residual heat such as flue gas of less than 400 DEG C, the most extensively and be in a large number present in the high energy consumption industries such as iron and steel, non-ferrous metal, building materials, petrochemical industry, chemical industry and electric power.This part of waste heat is low because of its energy grad, and traditional Land use systems cannot meet requirement, is not generally fully utilized, and causes substantial amounts of energy waste, and exacerbates environmental pollution.
Town dweller's life and industrial processes also exist the energy demand such as substantial amounts of heating, electricity consumption and domestic water.These produce and life is with causing serious atmospheric pollution essentially from fossil energy.Especially a large amount of uses of coal, are one of the main reason of northern area Heating Period haze weather.Therefore, in the area that energy consumption is bigger, if taking effective manner, recycle by low grade residual heat produced by the industrial undertaking of cities and towns periphery, substitute fossil energy, meet the use energy demand of the productive life of town dweller and industrial undertaking, China's energy-saving and emission-reduction and prevention and control of air pollution work will be promoted effectively.
In recent years, along with the continuous progress of power-saving technology, some low grade residual heat recoverying and utilizing methods and device started appearance.Wherein: the engineer applied utilizing low grade residual heat heating to begin with some little scopes is attempted;The low grade residual heat electricity generation system using organic Rankine bottoming cycle is initially entered into the commercial applications stage;The system being used again by heat pump lifting waste heat taste is also suggested.But, there is many restrictions in the application of these method and apparatus, such as: if being only used for heating, waste heat can be caused cannot to use in non-heating period;If being only used for generating, efficiency of energy utilization is the highest;And promote waste heat by newly-increased heat pump and sample, not only need to consume a part of high-grade electric energy, but also improve the investment construction cost of system.
Visible, the most still lack and a kind of industry low grade residual heat can be realized the method and device system that high efficiency and scale recycle in the whole year, meet the multiple energy demand such as town dweller and the heating of industrial undertaking, electricity consumption and domestic hot-water.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art; the purpose of this utility model is to provide a kind of industry low grade residual heat energy supply system; UTILIZATION OF VESIDUAL HEAT IN end heat outputting, electricity and domestic hot-water; meet the multiple energy demand such as town dweller and the heating of industrial undertaking, electricity consumption and domestic hot-water, in high efficiency and the scale comprehensive utilization of the existing waste heat of annual interior-excess.
The purpose of this utility model can be achieved through the following technical solutions:
Industry low grade residual heat energy supply system, including waste heat acquisition subsystem, energy source station subsystem, supplies thermal sub-system, organic Rankine bottoming cycle power generation sub-system and domestic hot-water supply subsystem;
Described waste heat acquisition subsystem is gathered circulating pump, afterheat heat exchanger and connecting line by waste heat and control valve is connected in sequence;
Described energy source station subsystem is made up of thermophore, energy supply circulating pump, recovery tank and connecting line and control valve;
Described confession thermal sub-system is mainly made up of heat supply initial station heat exchanger, heat circulation pump and heat supplying pipeline and control valve, is connected to cities and towns central heating network, it is achieved central heating;
Described organic Rankine bottoming cycle power generation sub-system is in turn connected to form closed circuit by organic working medium circulating pump, preheater, vaporizer, screw expander, condenser, fluid reservoir and pipeline and control valve, and produced electric energy by described screw expansion machine driving generator, it is achieved grid-connected power supply;
Described domestic hot-water supply subsystem is mainly delivered to user by domestic hot-water's feed pump through corresponding pipeline and control valve, it is achieved domestic hot-water supply;
In described waste heat acquisition subsystem, the front end of afterheat heat exchanger gathers circulating pump by waste heat and control valve is connected with the preheater in the recovery tank in described energy source station subsystem and described organic Rankine bottoming cycle power generation sub-system respectively, and its rear end is connected with the thermophore in described energy source station subsystem by connecting pipeline;
In described confession thermal sub-system, control valve, heat circulation pump and heat supply initial station heat exchanger are sequentially connected with by connecting line, are ultimately connected to cities and towns central heating network;
In described organic Rankine bottoming cycle power generation sub-system, organic working medium circulating pump, preheater, vaporizer, screw expander, condenser, fluid reservoir and control valve are sequentially connected with by connecting line, meanwhile, and condenser external cooling water;Vaporizer and preheater connect the energy supply circulating pump in described energy source station subsystem by connecting line and control valve, and are connected the waste heat collection circulating pump in described waste heat acquisition subsystem by connecting line and control valve;Screw expander connects electromotor, and institute's electricity is connected to the grid;
In described domestic hot-water supply subsystem, domestic hot-water's feed pump is connected with the thermophore in described energy source station subsystem with control valve by connecting line.
Described low grade residual heat refers to industrial exhaust heat, specifically refers to the liquid of 60~100 DEG C and the flue gas of 200~400 DEG C.
Described waste heat acquisition subsystem, the heat-exchange working medium of energy source station subsystem, confession thermal sub-system and domestic hot-water supply subsystem is water, and the working medium of described organic Rankine bottoming cycle power generation sub-system is lower boiling organic working medium.
Described control valve is electromagnetic type, and equipped with radio frequency control apparatus.
Described waste heat gathers circulating pump, energy supply circulating pump, heat circulation pump, organic working medium circulating pump and domestic hot-water's feed pump and is equipped with frequency conversion facility, and equipped with radio frequency control apparatus.
In described waste heat acquisition subsystem: the external low grade residual heat of afterheat heat exchanger, according to the difference of heat resource form, heat exchanger types is the one in water-water heat exchanger or air-water heat exchanger accordingly;Gather circulating pump by VFC waste heat, when making in the thermophore in the energy source station subsystem described in the entrance of subsystem outlet water at tail end, reach required temperature and flow.
In described energy source station subsystem: the heat energy accumulation that described waste heat acquisition subsystem is gathered by thermophore, and realize smooth output by energy supply circulating pump;By controlling related valve, the hot water accumulated in thermophore can be partly or entirely pumped in the heat supply initial station heat exchanger of described confession thermal sub-system by energy supply circulating pump according to demand, or carry out heat exchange to the vaporizer and preheater of described organic Rankine bottoming cycle power generation sub-system, simultaneously, moreover it is possible to be further advanced by domestic hot-water's feed pump and be pumped in described domestic hot-water supply subsystem;Carrying through energy supply circulating pump from thermophore hot water out, after completing heat exchange, part is by recovery tank, and remainder directly by non-return valve, gathers circulating pump via the waste heat in described waste heat acquisition subsystem, finally empties back in described waste heat acquisition subsystem;Recovery tank has moisturizing and water-retention energy supply, to maintain the mass balance taking thermal cycle;Thermophore and recovery tank are equipped with sensor-based system, including temperature, pressure and level sensor.
In described organic Rankine bottoming cycle power generation sub-system: preheater and vaporizer are shell-and-tube organic working medium-water-to-water heat exchanger, organic working medium wherein with hot water heat exchange after, become the gas working medium of high pressure, drive screw expander acting, thus pushing generator generating;Gas working medium after expanding, becomes liquid to enter into fluid reservoir through external cooling water condensation within the condenser, then returns to, in preheater and vaporizer, complete whole organic Rankine bottoming cycle electricity generation grid-connecting by working medium pump, it is achieved power supply.
In described confession thermal sub-system: heat supply initial station heat exchanger is liquid-liquid type heat exchanger, after the heat exchange wherein of heat supply backwater, heat circulation pump is delivered to cities and towns central heating network through a pipe network, it is achieved heat supply.
In described domestic hot-water supply subsystem: domestic hot-water is delivered to user via the thermophore from described energy source station subsystem of domestic hot-water's feed pump, it is achieved domestic hot-water supply.
Compared with prior art, this utility model has the advantages that
1. industry low grade residual heat can be realized high efficiency in the whole year and scale recycles, substitute fossil energy, promote energy-saving and emission-reduction and prevention and control of air pollution;
2. meet the multiple energy demand such as town dweller and the heating of industrial undertaking, electricity consumption and domestic hot-water.
Accompanying drawing explanation
Fig. 1 is system principle schematic diagram of the present utility model.
Wherein: waste heat gathers circulating pump 1;Afterheat heat exchanger 2;Thermophore 3;Energy supply circulating pump 4;Heat supply initial station heat exchanger 5;Recovery tank 6;Vaporizer 7;Preheater 8;Heat circulation pump 9;Organic working medium circulating pump 10;Screw expander 11;Electromotor 12;Condenser 13;Fluid reservoir 14;Thermophore sensor-based system (including temperature, pressure, water level) 15;Recovery tank sensor-based system (including temperature, pressure, water level) 16;Domestic hot-water's feed pump 17;Control valve 1801~1814.
Detailed description of the invention
Below in conjunction with Fig. 1, this utility model is described further.
Embodiment 1: as it is shown in figure 1, industry low grade residual heat energy supply system, including waste heat acquisition subsystem, energy source station subsystem, supply thermal sub-system, organic Rankine bottoming cycle power generation sub-system and domestic hot-water supply subsystem.
Waste heat acquisition subsystem is gathered circulating pump 1, afterheat heat exchanger 2 and connecting line by waste heat and control valve 1801,1810,1814 forms;Energy source station subsystem is made up of thermophore 3, energy supply circulating pump 4, recovery tank 6 and connecting line and control valve 1802~1809;It is made up of heat supply initial station heat exchanger 5, heat circulation pump 9 and heat supplying pipeline and control valve 1811 for thermal sub-system;Organic Rankine bottoming cycle power generation sub-system is made up of organic working medium circulating pump 10, preheater 8, vaporizer 7, screw expander 11, condenser 13, fluid reservoir 14, electromotor 12 and connecting line and control valve 1813;Domestic hot-water supply subsystem is made up of domestic hot-water's feed pump 17 and connecting line and control valve 1812.
Waste heat acquisition subsystem, confession thermal sub-system, organic Rankine bottoming cycle power generation sub-system are connected with thermophore 3 and the recovery tank 6 of energy source station subsystem with the end of domestic hot-water supply subsystem, respectively to maintain quality and the energy balance of system;Domestic hot-water supply subsystem connects with the thermophore 3 of energy source station subsystem.
In waste heat acquisition subsystem, the afterheat of hot water that cryogenic heat exchanger 2 is external about 85 DEG C, control waste heat and gather the circulating water flow of circulating pump 1, make the hot water of the thermophore 3 in entrance energy source station subsystem reach about 70 DEG C.
Energy source station subsystem plays the accumulation of the energy to whole system, dispatches and balance control action.The heat energy accumulation that described waste heat acquisition subsystem is gathered by thermophore 3, and realize smooth output by energy supply circulating pump 4.In the winter time under heating period operating mode: control valve 1805 standard-sized sheet, in thermophore 3, hot water preferentially enters for, in thermal sub-system, meeting heat demand, if low grade residual heat resource is sufficient, control valve 1806 meanwhile partially opens, and hot water more than needed enters organic Rankine bottoming cycle power generation sub-system, is used for generating electricity;If low grade residual heat resource is inadequate, then completely close control valve 1806, organic Rankine bottoming cycle power generation sub-system out of service.Under non-heating period operating mode: control valve 1805 is fully closed, out of service for thermal sub-system;Control valve 1806 standard-sized sheet, during in thermophore 3, hot water enters organic Rankine bottoming cycle power generation sub-system, is used for generating electricity.Under heating period and non-heating period operating mode, in thermophore 3, hot water can also be delivered in domestic hot-water supply subsystem by domestic hot-water's feed pump 17 simultaneously, it is achieved domestic hot-water supply.From thermophore 3 hot water out after heat exchange, part is by recovery tank 6, and remainder directly by non-return valve 1814, gathers circulating pump 1 via waste heat, finally empties back in waste heat acquisition subsystem;Recovery tank 6 has moisturizing and water-retention energy supply, to maintain the mass balance taking thermal cycle;Being equipped with sensor-based system 15,16 in thermophore 3 and recovery tank 6, including temperature, pressure and level sensor, control system controls the operation of other correlation subsystem by these parameters, and meet user uses energy demand, and maintains the energy balance of whole system.
In heating period, thermophore 3, hot water enters in thermal sub-system, preferentially meets heat demand, and heat supply backwater therewith after heat exchange, is delivered to cities and towns central heating network by heat circulation pump 9 through a pipe network, it is achieved heat supply in the heat exchanger 5 of heat supply initial station.
When non-heating period or heating period and low grade residual heat resource abundance, the hot water in thermophore 3 sequentially enters in vaporizer 7 and preheater 8 and carries out heat exchange with organic working medium;Organic working medium absorbs heat energy successively in preheater 8 and vaporizer 7, becomes the gas working medium of high pressure, drives screw expander 11 to do work, thus pushing generator 12 generates electricity;Gas working medium after expanding, becomes liquid to enter into fluid reservoir 14 through external cooling water condensation in condenser 13, then returns to, in preheater 8 and vaporizer 7, complete whole organic Rankine bottoming cycle electricity generation grid-connecting by working medium pump 14, it is achieved power supply.
Under heating period and non-heating period operating mode, in thermophore 3, hot water can also be delivered to user via domestic hot-water's feed pump 17 simultaneously, it is achieved domestic hot-water supply.
Embodiment 2: as shown in Figure 1, the Regional Energy supply system recycled based on multiple low grade residual heat integrative, the present embodiment is same as in Example 1, the wherein fume afterheat of external about 300 DEG C of the afterheat heat exchanger 2 in waste heat acquisition subsystem, control waste heat and gather the circulating water flow of circulating pump 1, make the hot water of the thermophore 3 of entrance energy source station subsystem reach about 90 DEG C.
Above example combines accompanying drawing and is explained in detail of the present utility model being embodied as, but due at waste heat recovery end with utilize end can meet different with can demand there to be multiple combination mode.Those of ordinary skill in the art can be easy to these embodiments be improved and revised, without entering creative work.Therefore, this utility model is not limited to above-described embodiment, and those skilled in the art should be within protection domain of the present utility model according to announcement of the present utility model, the improvement made without departing from category of the present utility model and amendment.

Claims (9)

1. industry low grade residual heat energy supply system, is characterized in that: includes waste heat acquisition subsystem, energy source station subsystem, supply thermal sub-system, organic Rankine bottoming cycle power generation sub-system and domestic hot-water supply subsystem;
Described waste heat acquisition subsystem includes that waste heat gathers circulating pump (1), afterheat heat exchanger (2) and connecting line and control valve (1801,1810,1814);
Described energy source station subsystem includes thermophore (3), energy supply circulating pump (4), recovery tank (6) and connecting line and control valve (1802~1809);Described confession thermal sub-system includes heat supply initial station heat exchanger (5), heat circulation pump (9) and heat supplying pipeline and control valve (2011);
Described organic Rankine bottoming cycle power generation sub-system includes organic working medium circulating pump (10), preheater (8), vaporizer (7), screw expander (11), condenser (13), fluid reservoir (14), electromotor (12) and connecting line and control valve (1813);
Described domestic hot-water supply subsystem includes domestic hot-water's feed pump (17) and connecting line and control valve (1812);
Described low grade residual heat refers to industrial exhaust heat, specifically refers to the liquid of 60~100 DEG C and the flue gas of 200~400 DEG C;
In described waste heat acquisition subsystem, the front end of afterheat heat exchanger (2) gathers circulating pump (1) by waste heat and control valve (1810,1814) is connected with the recovery tank (6) in described energy source station subsystem and the preheater (8) in described organic Rankine bottoming cycle power generation sub-system respectively, and its rear end is connected with the thermophore (3) in described energy source station subsystem by connecting pipeline;
In described confession thermal sub-system, control valve (1811), heat circulation pump (9) and heat supply initial station heat exchanger (5) are sequentially connected with by connecting line, are ultimately connected to cities and towns central heating network;
In described organic Rankine bottoming cycle power generation sub-system, organic working medium circulating pump (10), preheater (8), vaporizer (7), screw expander (11), condenser (13), fluid reservoir (14) and control valve (1813) are sequentially connected with by connecting line, meanwhile, condenser (13) external cooling water;Vaporizer (7) and preheater (8) connect the energy supply circulating pump (4) in described energy source station subsystem by connecting line and control valve (1806), and are connected waste heat collection circulating pump (1) in described waste heat acquisition subsystem by connecting line and control valve (1814,1810);Screw expander (11) connects electromotor, and institute's electricity is connected to the grid;
In described domestic hot-water supply subsystem, domestic hot-water's feed pump (17) is connected with the thermophore (3) in described energy source station subsystem with control valve (1812) by connecting line.
Energy supply system the most according to claim 1, is characterized in that: in described waste heat acquisition subsystem, and afterheat heat exchanger (2) type is water-water heat exchanger or the one of air-water heat exchanger;Gather circulating pump (1) by VFC waste heat, when making in the thermophore (3) in the energy source station subsystem described in the entrance of subsystem outlet water at tail end, reach required temperature and flow.
Energy supply system the most according to claim 1 and 2, it is characterized in that: in described energy source station subsystem, the heat energy accumulation that described waste heat acquisition subsystem is gathered by thermophore (3), and realize smooth output by energy supply circulating pump (4);By controlling relevant control valve (1805~1806), the hot water accumulated in thermophore (3) can be partly or entirely pumped in heat supply initial station heat exchanger (5) of described confession thermal sub-system by energy supply circulating pump (4) according to demand, or carry out heat exchange to the vaporizer (7) and preheater (8) of described organic Rankine bottoming cycle power generation sub-system, simultaneously, moreover it is possible to be further advanced by domestic hot-water's feed pump (17) and be pumped in described domestic hot-water supply subsystem;From thermophore (3) hot water out after energy supply circulating pump (4) pumping heat exchange, part is by recovery tank (6), remainder is directly by non-return valve (1814), gather circulating pump (1) via the waste heat in described waste heat acquisition subsystem, finally empty back in described waste heat acquisition subsystem;Recovery tank (6) has moisturizing and water-retention energy supply, to maintain the mass balance of system;Thermophore (3) and recovery tank (6) are equipped with sensor-based system (15,16), including temperature, pressure and level sensor.
Energy supply system the most according to claim 1 and 2, it is characterized in that: in described organic Rankine bottoming cycle power generation sub-system, preheater (8) and vaporizer (7) are shell-and-tube organic working medium-water-to-water heat exchanger, organic working medium wherein with hot water heat exchange after, become the gas working medium of high pressure, drive screw expander (11) acting, thus pushing generator (12) generates electricity;Gas working medium after expanding, liquid is become to enter into fluid reservoir (14) through external cooling water condensation in condenser (13), return in preheater (8) and vaporizer (7) by organic working medium circulating pump (10) again, complete electricity generation grid-connecting after whole organic Rankine bottoming cycle, it is achieved power supply.
Energy supply system the most according to claim 1 and 2, it is characterized in that: in described confession thermal sub-system, heat supply initial station heat exchanger (5) is liquid-liquid type heat exchanger, after the heat exchange wherein of heat supply backwater, it is delivered to cities and towns central heating network, it is achieved heat supply by heat circulation pump (9).
Energy supply system the most according to claim 1 and 2, it is characterized in that: in described domestic hot-water supply subsystem, domestic hot-water is delivered to user via the domestic hot-water's feed pump (17) thermophore (3) from described energy source station subsystem, it is achieved domestic hot-water supply.
Energy supply system the most according to claim 1 and 2, it is characterized in that: described waste heat acquisition subsystem, the heat-exchange working medium of energy source station subsystem, confession thermal sub-system and domestic hot-water supply subsystem is water, and the working medium of described organic Rankine bottoming cycle power generation sub-system is lower boiling organic working medium.
Energy supply system the most according to claim 1, is characterized in that, described control valve (1801~1813) is electromagnetic type, and equipped with radio frequency control apparatus.
Energy supply system the most according to claim 1, it is characterized in that, described waste heat gathers circulating pump (1), energy supply circulating pump (4), heat circulation pump (9), organic working medium circulating pump (10) and domestic hot-water's feed pump (17) and is equipped with frequency conversion facility, and equipped with radio frequency control apparatus.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111219909A (en) * 2020-01-15 2020-06-02 华电电力科学研究院有限公司 Distributed energy station regional energy supply method with energy storage device and combined with industrial waste heat

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111219909A (en) * 2020-01-15 2020-06-02 华电电力科学研究院有限公司 Distributed energy station regional energy supply method with energy storage device and combined with industrial waste heat

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