CN204154028U

CN204154028U - Flue gas source heat pump hot-water system

Info

Publication number: CN204154028U
Application number: CN201420452806.XU
Authority: CN
Inventors: 吴金星; 王超; 刘艳会; 王明强; 栗俊芬; 彭旭
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2014-08-12
Filing date: 2014-08-12
Publication date: 2015-02-11
Anticipated expiration: 2024-08-12

Abstract

The utility model discloses a kind of flue gas source heat pump hot-water system.Flue gas source heat pump hot-water system comprises heat pipe evaporator, gas-liquid separator, compressor, shell-and-tube cooler, reservoir, device for drying and filtering and choke valve, described parts stainless steel tube is in turn connected into a closed cycle system, passes into cold-producing medium in system; Described heat pipe evaporator comprises endotherm section smoke box and heat release section cylindrical shell, installs helical corrugation fin additional with augmentation of heat transfer in smoke box outside every root heat pipe, and heat release section adopts cylinder to improve resistance to pressure; Described shell-and-tube cooler adopts inwall micro-rib pipe and pipe external spiral fin to support.When flue gas source heat pump hot-water system runs, flue gas enters the heat pipe evaporator of heat pump hot-water system, by heat pipe, heat is passed to cold-producing medium, and cold-producing medium delivers to heating tap water in shell-and-tube cooler by compressor.Flue gas source heat pump hot-water system energy directly high efficiente callback low-temperature flue gas waste heat, adopts heat pipe evaporator, can avoid the refrigrant leakage that flue gas corrosion causes.

Description

Flue gas source heat pump hot-water system

Technical field

The utility model relates to a kind of heat pump, particularly relates to a kind of flue gas source heat pump hot-water system, belongs to heat recovery field.

Background technology

A large amount of high-temperature flue gas is discharged in the running such as gas fired-boiler, kiln, fin-tube type gas-water-to-water heat exchanger Mist heat recovering is utilized to be technology comparatively ripe at present, but because it is subject to the restriction of heat transfer temperature difference and waste heat recovery economy, the partial heat in high-temperature flue gas can only be reclaimed, so can low-temperature flue gas be produced after gas-water-to-water heat exchanger recovery waste heat, its exhaust gas temperature is still at about 80 DEG C, and a large amount of low temperature exhaust heats is not recovered and utilizes and directly enter air, causes huge energy waste.

Air source heat pump take surrounding air as thermal source; absorb the heat of air and improve its grade and produce the equipment of hot-air or hot water; be used widely in southern area because of the feature of its efficient energy-saving; but under the environmental condition that northern area winter temperature is very low; the heating efficiency of air source heat pump can reduce greatly; and often there will be frosting problem, which limits air source heat pump applying at northern area.

If traditional air source heat pump is used for flue gas waste heat recovery, air source heat pump adopts Fin and tube evaporator usually, after operation of heat pump a period of time, there will be the heat exchanger tube corrosion and damage of evaporimeter and makes refrigrant leakage, thus cause whole heat pump to be paralysed, cause economic loss.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of flue gas source heat pump hot-water system, and energy is high efficiente callback low-temperature flue gas waste heat directly, avoids the refrigrant leakage that flue gas corrosion causes.

The utility model adopts following technical scheme: a kind of flue gas source heat pump hot-water system, comprise heat pipe evaporator, gas-liquid separator, compressor, shell-and-tube cooler, reservoir, device for drying and filtering and choke valve, described parts connect successively with stainless steel tube and form a closed cycle system, pass into cold-producing medium in system.Described heat pipe evaporator is using steel-water gravity heat pipe as crucial heat transfer element, comprise the endotherm section smoke box of bottom and the heat release section cylindrical shell on top, helical corrugation fin is installed additional to improve heat transfer property outside every root heat pipe in smoke box, heat release section cylindrical shell adopts cylinder to improve resistance to pressure, use dull and stereotyped as seal diaphragm between two sections, again as the tube sheet of fixing heat pipe, seal diaphragm can also prevent flue gas and cold-producing medium cross pollution.Described shell-and-tube cooler adopts fixed tube sheet type, and its heat exchanger tube adopts inwall micro-rib pipe, and the outer winding screw fin of heat exchanger tube, spiral fin is again as tube bundle support.

Described compressor adopts high temperature screw compressor, and the maximum temperature of compressed media can reach 85 DEG C.

Gas-liquid separator is connected with, in case the wet running of compressor between described heat pipe evaporator and compressor.

Reservoir and device for drying and filtering is connected with between described shell-and-tube cooler and choke valve.

Flue gas source heat pump hot-water system comprises three technological processes when running:

(1) exhaust-heat absorption flow process: low-temperature flue gas enters the heat pipe evaporator lower end smoke box of flue gas source heat pump hot-water system, in smoke box fume afterheat absorb by heat pipe evaporator section, by the working medium in heat pipe, heat is passed to heat pipe condenser section, liquid refrigerant outside heating-condensing section, after cold-producing medium heat absorption, evaporation becomes gaseous state, flue gas after cooling enters environment by the exhanst gas outlet of smoke box, completes exhaust-heat absorption flow process.

(2) waste heat transfer process: the cold-producing medium after heat absorption vaporization enters compressor through the gas-liquid separator of flue gas source heat pump hot-water system, gaseous refrigerant is compressed rear pressure and temperature and is raised, enter into shell-and-tube cooler afterwards, complete waste heat transfer process.

(3) UTILIZATION OF VESIDUAL HEAT IN flow process: the high temperature liquid refrigerant from compressor flows through from the tube side of shell-and-tube cooler, liquid state is condensed into after heat release, liquid refrigerant gets back to heat pipe evaporator through reservoir, device for drying and filtering and choke valve, heated when running water flows through the shell side of shell-and-tube cooler simultaneously, hot water is transported to heat user by outside network, completes UTILIZATION OF VESIDUAL HEAT IN flow process.

After the utility model adopts technique scheme, compared with prior art there is following beneficial effect: one is the heat pump hot-water system using low-temperature flue gas as thermal source, can not only high efficiente callback low-temperature flue gas waste heat, save the energy, and the hot water of higher temperature can be produced, also make the heating efficiency of heat pump hot-water system greatly improve, reduce the production cost of hot water, the problem such as efficiency low and frosting when simultaneously also avoid air source heat pump winter operation; Two is that flue gas source heat pump hot-water system adopts heat pipe evaporator, not only achieves the efficient heat transfer between flue gas and cold-producing medium, but also solves the problem causing refrigrant leakage because of the heat exchanger tube corrosion and damage of evaporimeter; Three is that the heat exchanger tube of shell-and-tube cooler adopts inwall micro-rib pipe, the condensation heat transfer efficiency of tube refrigerant can be improved, the outer winding screw fin of heat exchanger tube, extratubal fluid can be impelled to spin around tube wall face flowing, the flow-disturbing effect specifically strong to fluid, to improve heat transfer outside a tube efficiency.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of flue gas source heat pump hot-water system.

Fig. 2 is the vertical section schematic diagram of heat pipe evaporator.

Fig. 3 is the cross sectional representation of inwall micro-rib pipe.

Fig. 4 is the schematic diagram of pipe external spiral fin.

Reference numeral, 1-heat pipe evaporator; 101-heat pipe evaporator section; 102-heat pipe condenser section; 2-gas-liquid separator; 3-compressor; 4-shell-and-tube cooler; 5-reservoir; 6-device for drying and filtering; 7-choke valve; 8-heat exchanger tube; 9-spiral fin.

Detailed description of the invention

By reference to the accompanying drawings detailed description of the invention of the present utility model is described.

A kind of flue gas source heat pump hot-water system comprises heat pipe evaporator 1, gas-liquid separator 2, compressor 3, shell-and-tube cooler 4, reservoir 5, device for drying and filtering 6, choke valve 7, wherein be connected with gas-liquid separator 2 between heat pipe evaporator 1 and compressor 3, reservoir 5 and device for drying and filtering 6 is connected with between shell-and-tube cooler 4 and choke valve 7, be in turn connected into a closed circulatory system with stainless steel tube between above-mentioned parts, in system, pass into cold-producing medium.

Flue gas source heat pump hot-water system comprises following technological process when running:

(1) low-temperature flue gas enters the heat pipe evaporator 1 lower end smoke box of flue gas source heat pump hot-water system, in smoke box fume afterheat absorb by heat pipe evaporator section 101, by the working medium in heat pipe, heat is passed to heat pipe condenser section 102, liquid refrigerant outside heating-condensing section 102, after cold-producing medium heat absorption, evaporation becomes gaseous state, flue gas after cooling enters environment by the exhanst gas outlet of smoke box, completes exhaust-heat absorption flow process.

(2) cold-producing medium after heat absorption vaporization enters compressor 3 through the gas-liquid separator 2 of flue gas source heat pump hot-water system, and gaseous refrigerant is compressed rear pressure and temperature and raises, and enters into shell-and-tube cooler 4 afterwards, completes waste heat transfer process.

(3) high temperature liquid refrigerant from compressor 3 flows through from the tube side of shell-and-tube cooler 4, liquid state is condensed into after heat release, liquid refrigerant gets back to heat pipe evaporator 1 through reservoir 5, device for drying and filtering 6 and choke valve 7, heated when running water flows through the shell side of shell-and-tube cooler 4 simultaneously, hot water is transported to heat user by outside network, completes UTILIZATION OF VESIDUAL HEAT IN flow process.

Illustrate the specific works process of flue gas source heat pump hot-water system below: low-temperature flue gas enters heat pipe evaporator 1 lower end smoke box, steel-water gravity heat pipe that working medium evaporating temperature is 30 DEG C is furnished with in smoke box, flue gas runs into the low-temperature heat exchange wall of heat pipe and releases the gasification latent heat of sensible heat and steam, flue-gas temperature is down to about 40 DEG C by 80 DEG C, enters environment by the exhanst gas outlet of smoke box.After fume afterheat is absorbed by heat pipe evaporator section 101, by the working medium in heat pipe, heat is passed to heat pipe condenser section 102, liquid refrigerant outside heating-condensing section, the evaporating temperature of cold-producing medium is 25 DEG C, after cold-producing medium heat absorption, evaporation becomes gaseous state, compressor 3 is entered through gas-liquid separator 2, high temperature (65 DEG C) cold-producing medium after being compressed by compressor 3 enters into the tube side of shell-and-tube cooler 4, liquid state is condensed into after heat release, liquid refrigerant gets back to heat pipe evaporator 1 through reservoir 5, device for drying and filtering 6 and choke valve 7, completes a refrigerant circulation.The shell side that simultaneously running water flows through shell-and-tube cooler 4 is heated to 55 DEG C from 25 DEG C, and hot water is transported to heat user by outside network.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims

1. A flue gas source heat pump hot water system, comprising a heat pipe evaporator, a gas-liquid separator, a compressor, a shell-and-tube condenser, a liquid reservoir, a dry filter and a throttle valve, characterized in that: The components are connected in sequence with stainless steel pipes to form a closed cycle system, and refrigerant is introduced into the system. The heat pipe evaporator uses a steel-water gravity heat pipe as the key heat transfer element, including the lower heat-absorbing section smoke box and the upper heat-releasing section cylinder, and each heat pipe in the smoke box is equipped with spiral corrugated fins outside. The cylinder body of the hot section adopts a cylinder body, and a flat plate is used as a sealing partition between the two sections, and is also used as a tube plate for fixing the heat pipe. The shell-and-tube condenser adopts a fixed tube-sheet type, and the heat exchange tube adopts a micro-finned tube on the inner wall, and spiral fins are wound outside the tube, and the spiral fins are used as a tube bundle support.

2. The flue gas source heat pump hot water system according to claim 1, wherein the compressor is a high-temperature screw compressor.

3. The flue gas source heat pump hot water system according to claim 1, characterized in that: a gas-liquid separator is connected between the heat pipe evaporator and the compressor.

4. The flue gas source heat pump hot water system according to claim 1, characterized in that: a liquid receiver and a dry filter are connected between the shell-and-tube condenser and the throttle valve.