WO2018232732A1

WO2018232732A1 - Heat exchange system for waste heat recovery

Info

Publication number: WO2018232732A1
Application number: PCT/CN2017/089733
Authority: WO
Inventors: 顾裕忠
Original assignee: 顾裕忠
Priority date: 2017-06-23
Filing date: 2017-06-23
Publication date: 2018-12-27

Abstract

A heat exchange system for waste heat recovery comprises a steam waste heat inlet (1), a condensate outlet (2), a circulation pump (3), and a water storage tank (4). The steam waste heat inlet (1) and the condensate outlet (2) are connected by a helical heat exchange tube (5). The helical heat exchange tube (5) is directly disposed in a waste heat exchange water tank (6). The waste heat exchange water tank (6) and the water storage tank (4) form a circulating water circuit via a pipeline (7) and the circulation pump (3). An inner wall of the helical heat exchange tube (5) sleeves on a core tube (51) to form a dual-layer heat exchange tube. The system uses the helical heat exchange tube (5) to recover steam waste heat, and heat energy that previously could not be utilized is stored in water. A controller (9) is provided to automatically control circulation between the waste heat exchange water tank (6) and the water storage tank (4), thereby realizing automated control. Hot air passes through the dual-layer heat exchange tube, and the heated core tube (51) is capable of thermal insulation, such that the hot air entering the dual-layer heat exchange tube is prevented from being immediately cooled and becoming condensate. Heat in boiler flue gas is effectively utilized, conserving energy and protecting the environment.

Description

Waste heat recovery heat exchange system

Technical field

The utility model relates to a heat exchange system, in particular to a waste heat recovery heat exchange system.

Background technique

In the modern industry, many processing processes need to be carried out at high temperatures. For example, in the fur industry, steam is required to be heated during steam setting. A large amount of steam is lowered to a certain temperature after being used, that is, the effect of setting and warming the skin is not possible. When this type of steam is directly recovered, it causes a certain amount of energy was wasted, and the heat generated during its natural cooling also has a certain impact on the working environment.

Utility model content

It is an object of the present invention to provide a waste heat recovery heat exchange system that solves one or more of the above prior art.

The utility model provides a waste heat recovery heat exchange system, which comprises a steam waste heat inlet, a condensed water outlet, a circulation pump and a water storage tank. The steam waste heat inlet and the condensed water outlet are connected by a spiral heat exchange tube, and the spiral heat exchange tube is directly arranged. In the waste heat exchange water tank, the waste heat exchange water tank forms a circulating water circuit through the pipeline and the circulation pump and the water storage tank, and the inner wall of the spiral heat exchange tube is provided with a core tube to form a double-layer heat exchange tube.

The utility model has the beneficial effects that: the spiral heat exchange tube recovers the residual heat of the storage steam, stores the heat energy that could not be used in the water, and sets a controller to automatically control the circulation between the waste heat exchange water tank and the water storage tank. With automatic control, the hot air passes through the double-layer heat exchange tube, and the core tube can be insulated by heating, so that the hot air enters the heat exchange tube and becomes condensed water immediately after the cold, effectively utilizing the heat in the boiler exhaust gas, thereby saving energy. Protected the environment.

In some embodiments, the controller further includes a temperature detector disposed in the waste heat exchange water tank and the water storage tank, the temperature detector and the controller being electrically connected, and the controller is further electrically connected to the circulation pump. The operation of the circulation pump is automatically controlled by the controller comparing the water temperature in the waste heat exchange water tank and the water storage tank.

In some embodiments, the diameter of the core tube is smaller than the inner diameter of the heat exchange tube, and the outer circumference of the core tube and the inner wall of the heat exchange tube form a space for heat conduction air. Preheating through the core tube and air conduction to the water in the water tank for heat exchange change.

DRAWINGS

1 is a schematic structural view of a waste heat recovery heat exchange system provided by the present invention;

2 is a transverse cross-sectional view showing an embodiment of a spiral heat exchange tube in a waste heat recovery heat exchange system provided by the present invention;

3 is a transverse cross-sectional view showing another embodiment of a spiral heat exchange tube in a waste heat recovery heat exchange system according to the present invention.

Detailed ways

The utility model provides a waste heat recovery heat exchange system, and the utility model is introduced in detail below with reference to the accompanying drawings and specific embodiments:

As shown in FIG. 1-3, the waste heat recovery heat exchange system described in the embodiment mainly includes a steam waste heat inlet 1, a condensate outlet 2, a circulation pump 3, and a water storage tank 4, and a steam waste heat inlet 1 and a condensed water outlet 2 The spiral heat exchange tubes 5 are connected, and the steam waste heat inlet 1 and the condensate water outlet 2 are flanged to the spiral heat exchange tubes 5. The spiral heat exchange tube 5 is directly laid in the waste heat exchange water tank 6, and the waste heat exchange water tank 6 forms a circulating water circuit through the pipeline 7 and the circulation pump 3 and the water storage tank 4, and the inner wall of the spiral heat exchange tube 5 is provided with a core tube 51. Double layer heat exchange tube.

A temperature detector 8 is disposed in the residual heat exchange water tank 6 and the water storage tank 4, and the temperature detector 8 and the controller 9 are electrically connected, and the controller 9 is also electrically connected to the circulation pump 3. The operation of the circulation pump 3 is automatically controlled by the controller 9 comparing the temperature of the water in the heat exchange water tank 6 and the water storage tank 4.

The core tube 51 is made of a non-metal material, and the non-metal material includes an inorganic non-metal material and an organic polymer material, such as ceramics, graphite, cement, and the like. The outer circumference of the core tube 51 is tightly fitted with the inner wall of the spiral heat exchange tube 5. The non-metallic core tube 51 can store preheating and has the ability to gradually dissipate heat, so as to prevent the residual heat from entering the metal tube and quenching even if it is condensed water, heat. Significantly reduced, no further heat exchange. The diameter of the core tube 51 is smaller than the inner diameter of the spiral heat exchange tube 5. The outer circumference of the core tube 51 and the inner wall of the spiral heat exchange tube 5 constitute a heat conduction air space 52, and the preheating heat exchange is performed through the core tube 51 and the water in the air conduction water tank.

In addition, the core tube 51 can also be made of a clay material, and the outer circumference of the core tube 51 is tightly fitted with the inner wall of the spiral heat exchange tube 5, and the precast ceramic core tube is installed in the spiral heat exchange tube 5.

The diameter of the core tube 51 is smaller than the inner diameter of the spiral heat exchange tube 5, and the outer circumference of the core tube 51 and the inner wall of the spiral heat exchange tube 5 are filled with cement to form a tube liner 53, and the above-mentioned prefabricated core tube tightly matched with the inner wall of the spiral heat exchange tube 5 The processing precision is high and the cost is increased. The outer diameter of the prefabricated core tube is smaller than the inner diameter of the heat exchange tube, and then the cement is filled. After solidification, the core tube can be extracted, and only the cost of the tube liner can be greatly reduced.

What has been described above is only some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and scope of the invention.

Claims

A waste heat recovery heat exchange system, comprising: steam waste heat inlet (1), condensate water outlet (2), circulation pump (3), water storage tank (4) and waste heat exchange water tank (6), steam waste heat inlet ( 1) is connected with the condensed water outlet (2) through a spiral heat exchange tube (5), which is directly disposed in the waste heat exchange water tank (6), and the waste heat exchange water tank (6) passes The pipeline (7) and the circulation pump (3) and the water storage tank (4) constitute a circulating water circuit, and the inner wall of the spiral heat exchange tube (5) is provided with a core tube (51) to form a double-layer heat exchange tube.
A waste heat recovery heat exchange system according to claim 1, further comprising a controller (9), wherein the residual heat exchange water tank (6) and the water storage tank (4) are respectively provided with temperature detectors (8) The temperature detector (8) and the controller (9) are electrically connected, while the controller (9) is also electrically connected to the circulation pump (3).
A waste heat recovery heat exchange system according to claim 1, wherein the core tube (51) has a smaller diameter than the inner diameter of the spiral heat exchange tube (5), and the core tube (51) has an outer circle and a spiral heat exchange. The inner wall of the tube (5) constitutes a thermally conductive air compartment (52).