CN215572323U

CN215572323U - Energy-saving heat exchange system

Info

Publication number: CN215572323U
Application number: CN202122086565.4U
Authority: CN
Inventors: 张可奎
Original assignee: Qingdao Dacheng Kefa Textile Technology Co ltd
Current assignee: Qingdao Dacheng Kefa Textile Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-01-18
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses an energy-saving heat exchange system, which relates to the technical field of heat exchangers and comprises a heat exchanger, wherein the heat exchanger comprises a shell and an inner pipe group arranged in the shell, and a closed interlayer space is enclosed between the shell and the inner pipe group; the two ends of the shell are respectively provided with a combustion port and a waste gas outlet; one end of the inner pipe group is opened and communicated with the combustion port, and the end of the inner pipe group, which is far away from the combustion port, is communicated with the waste gas outlet; the outer side wall of the shell is also provided with a fresh air inlet and a fresh air outlet which are communicated with the interlayer space. The utility model provides an energy-saving heat exchange system which has stable work, high heat exchange efficiency and outstanding energy-saving effect and can reduce product pollution.

Description

Energy-saving heat exchange system

Technical Field

The utility model relates to the technical field of heat exchangers, in particular to an energy-saving heat exchange system.

Background

The heat exchanger is an energy-saving device for transferring heat between materials between two or more than two fluids with different temperatures, the heat is transferred from the fluid with higher temperature to the fluid with lower temperature, the temperature of the fluid reaches the index specified by the process so as to meet the requirements of process conditions, and meanwhile, the heat exchanger is one of main devices for improving the energy utilization rate, and is applied to the industries of textile, food, packaging and the like.

At present, most heat exchangers heat fluid in an electric heating mode to realize heat exchange; however, the electric heating mode has the obvious problem of high energy consumption, and is not in line with the national energy-saving call. For this reason, some manufacturers have attempted to use natural gas-fired heating instead of electric heating. However, for specific industry fields, such as food or textile industries with high requirements for environmental protection and product components, the problem of pollution caused by burning natural gas is a difficult problem in front of manufacturers.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an energy-saving heat exchange system, which utilizes combustion natural gas to replace the traditional electric heating mode, so that air and fresh air which are heated by combustion respectively flow through an inner pipe group and an interlayer space, the air and the fresh air are effectively separated, the energy consumption is greatly reduced, the energy is saved, meanwhile, the pollution is effectively avoided, and the product quality is effectively guaranteed.

The technical purpose of the utility model is realized by the following technical scheme:

an energy-saving heat exchange system comprises a heat exchanger, wherein the heat exchanger comprises a shell and an inner pipe group arranged in the shell, and a closed interlayer space is defined between the shell and the inner pipe group; the two ends of the shell are respectively provided with a combustion port and a waste gas outlet; one end of the inner pipe group is opened and communicated with the combustion port, and one end of the inner pipe group, which is far away from the combustion port, is communicated with the waste gas outlet; and the outer side wall of the shell is also provided with a fresh air inlet and a fresh air outlet which are communicated with the interlayer space.

By adopting the technical scheme, in work, air heated by combustion enters the inner pipe group through the combustion port and is discharged from the waste gas outlet; meanwhile, fresh air enters the interlayer space from the fresh air inlet to exchange heat; in the process, air heated by combustion and fresh air are subjected to sufficient heat exchange through the internal pipe group, and after the heat exchange is completed, hot air is discharged through the fresh air outlet for production and use. Therefore, on one hand, the heating mode of burning natural gas is more energy-saving, and the energy saving can reach more than 50 percent at most; on the other hand, pollutants generated by burning natural gas are separated by the inner pipe, so that hot air required by production is effectively prevented from being polluted, clean production is ensured, the production quality of products is fully ensured, and the requirements of parts of regions with higher standards for product components at home and abroad can be particularly met.

The utility model is further configured to: the inner pipe group comprises an inner pipe fixedly arranged in the shell, one end of the inner pipe is opened and communicated with the combustion port, and a first sealing plate is fixed at one end of the inner pipe, which is far away from the combustion port; a second sealing plate is fixed on one side of the inner wall of the shell, which is far away from the combustion port; a plurality of shunt tubes are connected between the first sealing plate and the second sealing plate, and two ends of each shunt tube are respectively communicated with the inner tube and the waste gas outlet.

Through adopting above-mentioned technical scheme, the during operation, the air of heating just can the burner port get into the inner tube earlier, then shunts and gets into each shunt tubes in first shrouding position, finally discharges and discharges away through the exhaust outlet from each shunt tube. So, because the air of heating in each shunt tubes department has realized the reposition of redundant personnel, in the intermediate layer space, the new trend can fully contact with each shunt tubes, helps improving the heat exchange efficiency between the air of heating and the new trend, guarantees its heat transfer effect, under the condition that the power consumption is the same, can guarantee to provide the hot-blast that satisfies its temperature demand for production.

The utility model is further configured to: the fresh air inlet and the fresh air outlet correspond to the inner shunt pipe section and the inner pipe section in the shell respectively, and the length ratio of the inner shunt pipe section to the inner pipe section in the shell is 1.2-1.5.

By adopting the technical scheme, the length ratio of the shunt pipe section to the inner pipe section is controlled, on one hand, the length of the shunt pipe section is ensured to be larger than that of the inner pipe section, so that the fresh air can be ensured to be fully subjected to heat exchange in the interlayer space, and the required temperature is ensured to be reached; on the other hand, because the inlet of the shunt pipe is obviously reduced in diameter, especially when part of the shunt pipe is blocked, if the internal space of the inner pipe section is too small, the pressure in the inner pipe section may be too high, thereby affecting the working stability of the heat exchanger.

The utility model is further configured to: the shunt tubes are straight tubes or bent tubes.

By adopting the technical scheme, the straight pipe or the bent pipe has the advantages and benefits. The straight pipe has the advantages that airflow flows more smoothly without dead angles, but the heat exchange effect is influenced to a certain extent due to the fact that the heat exchange path is relatively short and the heat exchange time is limited. The advantage of adopting the return bend has prolonged the heat transfer route, and indirect extension heat transfer time helps abundant heat transfer, but the inside dead angle that appears easily of return bend, and the later stage is difficult to the clearance.

The utility model is further configured to: transition fillets are formed at the edges of the two axial ends of the inner tube.

Through adopting above-mentioned technical scheme, through setting up the transition fillet at interior well tubular shaft axial both ends border for the gas flow is more smooth and easy, avoids appearing the dead angle.

The utility model is further configured to: a plurality of heat storage balls are fixed between the shunt pipes.

By adopting the technical scheme, the heat storage balls are arranged among the shunt pipes, and can absorb redundant heat and continuously release the heat in the subsequent heat exchange process; especially when the heat supply is insufficient or the internal pipeline is blocked to cause the reduction of the heat exchange efficiency during the combustion of the natural gas, the heat storage ball can play a role in temporary heat supply, and the influence of adverse conditions on the field production is reduced.

The utility model is further configured to: the waste gas outlet is of a trumpet-shaped structure.

The utility model is further configured to: the heat exchange system further comprises an air filter and a fan, wherein the air inlet of the fan is connected with the air outlet of the air filter, and the air outlet of the fan is connected with a fresh air inlet through a pipeline.

Through adopting above-mentioned technical scheme, before the new trend gets into the intermediate layer space through the new trend entry, filter the air through air cleaner, help further pollution abatement.

The utility model is further configured to: and the waste gas outlet is communicated with the air inlet of the fan.

Through adopting above-mentioned technical scheme, to the occasion that product standard required relatively lower (carrying out according to specific industry standard), can communicate waste gas outlet and fan air intake for heated air after the heat transfer passes through waste gas outlet and gets into the fan, makes it mix with the new trend, then gets into the intermediate layer space through the new trend entry and carries out the heat transfer. By adopting the mode, the waste heat in the air discharged from the waste gas outlet can be fully utilized, and the energy consumption is further reduced.

In conclusion, the beneficial technical effects of the utility model are as follows:

(1) the natural gas is used for replacing the traditional electric heating mode, so that the air and the fresh air which are heated by combustion flow through the internal pipe group and the interlayer space respectively, the air and the fresh air are effectively separated, the energy consumption is greatly reduced, the energy is saved, and meanwhile, the pollution is effectively avoided, so that the product quality is effectively guaranteed;

(2) The internal pipe group is arranged into a structural form of combining the internal pipe section and the shunt pipe section, and the length ratio of the shunt pipe section to the internal pipe section is strictly controlled, so that the heat exchange efficiency is greatly improved on the premise of ensuring heat supply, and the further reduction of energy consumption is facilitated;

(3) through setting up air cleaner to link to each other waste gas outlet and fan air intake, not only can further reduce product pollution, the waste heat that can make full use of heated air moreover can further reduce the energy consumption.

Drawings

FIG. 1 is a schematic overall structure of one embodiment of the present invention;

FIG. 2 is a schematic diagram of a heat exchanger according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a heat exchanger according to another embodiment of the present invention.

Reference numerals: 100. a heat exchanger; 110. a housing; 111. a burner port; 112. an exhaust gas outlet; 113. a fresh air inlet; 114. a fresh air outlet; 120. an inner tube set; 121. an inner tube; 122. a first seal plate; 123. a second seal plate; 124. a shunt tube; 200. a fan; 300. an air cleaner; 400. an interlayer space; 500. and a heat storage ball.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying examples.

Referring to fig. 1, an energy-saving heat exchange system includes a heat exchanger 100 and a fan 200 connected to the heat exchanger 100, and an air cleaner 300 is further connected to an air inlet of the fan 200. In operation, under the action of the fan 200, air is filtered by the air filter 300 and then enters the heat exchanger 100, and is used for production after heat exchange in the heat exchanger 100 is completed.

Referring to fig. 2, the heat exchanger 100 includes a housing 110 and an inner tube group 120 disposed inside the housing 110. Wherein, the whole body of the shell 110 can be set into a hollow cylinder structure, and the two axial ends are respectively provided with a combustion port 111 and an exhaust gas outlet 112; the combustion port 111 is used for connecting a combustor, heated air enters the shell 110, and waste gas after heat exchange is finished is discharged through a waste gas outlet 112; the exhaust outlet 112 may be configured as a bell mouth structure to facilitate exhaust gas discharge. It should be noted that, unlike the technical scheme of the traditional combustor that adopts an air compressor to supply air, in the technical scheme provided by the present invention, the air supply equipment used in cooperation with the combustor can use a centrifugal small fan; the air compressor air supply can take away about 20% of heat, is unfavorable for abundant heat transfer, and the energy-conservation about 20 times can be realized to the little fan of centrifugation than air compressor, and the advantage is more obvious.

The inner tube group 120 includes an inner tube 121 coaxially and fixedly disposed inside the casing 110, and one end of the inner tube 121 is open and communicated with the combustion port 111; the heated air directly enters the inner pipe 121 through the opening after entering the housing 110 through the burner port 111. A first sealing plate 122 is fixed at one end of the inner pipe 121 far away from the combustion port 111, and a second sealing plate 123 is fixed at one side of the inner wall of the shell 110 far away from the combustion port 111; a plurality of evenly distributed shunt tubes 124 are connected between the first sealing plate 122 and the second sealing plate 123, and two ends of the shunt tubes 124 are respectively communicated with the inner tube 121 and the exhaust outlet 112. In this manner, the inner tube set 120 forms a clearly separated section of the shunt tubes 124 and section of the inner tubes 121 within the housing 110, and the inner tube set 120 and the inner wall of the housing 110 just enclose a closed sandwich space 400 (the grid area in fig. 2). In actual operation, heated air directly enters the inner pipe 121 through the combustion port 111, flows along the inner pipe 121 and the branch pipes 124, and is finally discharged through the exhaust gas outlet 112; in this process, the heated air does not contact the air inside the sandwiched space 400.

The shunt tube 124 can be arranged as a straight tube or as a bent tube as required, and the two methods have advantages and disadvantages respectively. When the shunt tube 124 is in a straight tube shape, the airflow flows more smoothly without dead angles, but the heat exchange effect is influenced to a certain extent because the heat exchange path is relatively short and the heat exchange time is limited; when the shunt tubes 124 are in the form of bent tubes, the heat exchange path is obviously lengthened, which is beneficial to prolonging the heat exchange time, thereby improving the heat exchange effect; but, in contrast, the elbow is difficult to clean at a later time. Meanwhile, it should be noted that when the shunt tube 124 is in the form of a bent tube, it may be a common bent tube, or a continuous or other special-shaped bent tube, which may be determined according to the installation space in the housing 110 and the actual heat exchange efficiency requirement. In addition, in order to ensure smooth flow of air in the interlayer space 400, transition fillets (not shown) may be further provided at both axial end edges of the inner tube 121.

With reference to fig. 3, in another embodiment, in order to further improve the use effect of the heat exchanger 100, a plurality of heat storage balls 500 may be disposed between the shunt tubes 124 in an adhering manner; the heat storage ball 500 has the remarkable characteristics of low re-burning linear shrinkage, high-temperature loaded softening temperature, corrosion resistance, high strength, large heat storage and release quantity, good thermal shock stability, good heat conduction performance, small thermal expansion coefficient and the like, and is an excellent refractory material; thus, the heat storage ball 500 can absorb the redundant heat and continuously release the heat in the subsequent heat exchange process; especially, when the heat supply is insufficient or the heat exchange efficiency is reduced due to the blockage of the internal pipeline, the heat storage ball 500 can play a role in temporary heat supply, and the influence of adverse conditions on the field production is reduced.

Referring to fig. 1-2, the outer sidewall of the casing 110 is further provided with a fresh air inlet 113 and a fresh air outlet 114, and the fresh air inlet 113 and the fresh air outlet 114 are both internally communicated with the interlayer space 400; the fresh air inlet 113 is connected to the outlet of the fan 200 through a pipeline, and the fresh air outlet 114 is connected to a heat utilization device through a pipeline for production.

It should be noted that, in order to ensure the heat exchange effect between the fresh air and the heated air, the fresh air inlet 113 and the fresh air outlet 114 respectively correspond to the division pipe 124 and the inner pipe 121 in the casing 110, that is, the fresh air can contact the division pipe 124 for heat exchange as soon as entering the interlayer space 400 through the fresh air inlet 113. Simultaneously, for further improving the heat transfer effect, can also strictly control the length ratio of above-mentioned shunt tubes 124 section and inner tube 121 section, the length ratio of the two can be controlled between 1.2 ~ 1.5, ensures on the one hand that the new trend can fully exchange heat with shunt tubes 124, and on the other hand guarantees the stability of equipment operation.

Meanwhile, for the occasion with relatively low requirement of product standard (executed according to specific industry standard), in order to further reduce energy consumption, the waste gas outlet 112 can be communicated with the air inlet of the fan 200 through a pipeline. Since the air discharged through the exhaust outlet 112 generally has a large amount of waste heat; thus, at the exhaust port through the exhaust gas outlet 112, it can be mixed with the fresh air from the air filter 300 in the fan 200 and discharged into the heat exchanger 100 again through the fresh air inlet 113 for secondary heat exchange; in this way, the waste heat in the air discharged from the exhaust outlet 112 can be fully utilized, thereby further reducing energy consumption.

The working principle of the embodiment is as follows: in operation, air heated by the burner enters the inner tube 121 through the burner port 111, and flows through the inner tube 121 and the branch pipes 124 in sequence; in this process, the fan 200 discharges the filtered fresh air into the interlayer space 400 through the fresh air inlet 113, so that the fresh air exchanges heat with the hot air flowing in the inner tube group 120. After heat exchange, the heated air in the inner tube group 120 can be discharged through the exhaust gas outlet 112; if necessary, under the action of the fan 200, the air discharged from the exhaust outlet 112 can be mixed with fresh air and enter the interlayer space 400 through the fresh air inlet 113 for further utilization. In this way, on the one hand, the inner tube bank 120 separates the air heated by the burner from the fresh air, which reduces pollution; on the other hand, if necessary, the air discharged from the exhaust outlet 112 can reenter the interlayer space 400 to realize waste heat utilization, and the energy consumption can be greatly reduced on the basis of ensuring the heat exchange effect by matching with the shunt pipe 124 section arranged in the shell 110.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.

Claims

1. An energy-saving heat exchange system comprises a heat exchanger (100), and is characterized in that: the heat exchanger (100) comprises a shell (110) and an inner tube group (120) arranged inside the shell (110), wherein a closed interlayer space (400) is enclosed between the shell (110) and the inner tube group (120); two ends of the shell (110) are respectively provided with a combustion port (111) and a waste gas outlet (112); one end of the inner tube group (120) is opened and communicated with the combustion port (111), and one end of the inner tube group (120) far away from the combustion port (111) is communicated with the waste gas outlet (112); and the outer side wall of the shell (110) is also provided with a fresh air inlet (113) and a fresh air outlet (114) which are communicated with the interlayer space (400).

2. The energy-saving heat exchange system of claim 1, wherein: the inner pipe group (120) comprises an inner pipe (121) fixedly arranged in the shell (110), one end of the inner pipe (121) is opened and communicated with the combustion port (111), and a first sealing plate (122) is fixedly arranged at one end, far away from the combustion port (111), of the inner pipe (121); a second sealing plate (123) is fixed on one side of the inner wall of the shell (110) far away from the combustion port (111); a plurality of shunt tubes (124) are connected between the first sealing plate (122) and the second sealing plate (123), and two ends of each shunt tube (124) are respectively communicated with the inner tube (121) and the exhaust gas outlet (112).

3. The energy-saving heat exchange system according to claim 2, wherein: fresh air inlet (113) and fresh air outlet (114) correspond interior shunt tubes (124) section and inner tube (121) section in casing (110) respectively, just the length ratio of interior shunt tubes (124) section and inner tube (121) section in casing (110) is 1.2 ~ 1.5.

4. The energy-saving heat exchange system according to claim 2, wherein: the shunt pipe (124) is a straight pipe or an elbow pipe.

5. The energy-saving heat exchange system according to claim 2, wherein: transition fillets are formed at the edges of the two axial ends of the inner pipe (121).

6. The energy-saving heat exchange system according to claim 2, wherein: a plurality of heat storage balls (500) are fixed between the shunt pipes (124).

7. An energy saving heat exchange system according to any one of claims 1 to 6, wherein: the waste gas outlet (112) is of a trumpet-shaped structure.

8. An energy saving heat exchange system according to any one of claims 1 to 6, wherein: the heat exchange system further comprises an air filter (300) and a fan (200) with an air inlet connected with an air outlet of the air filter (300), wherein the air outlet of the fan (200) is connected with a fresh air inlet (113) through a pipeline.

9. The energy-saving heat exchange system according to claim 8, wherein: and the waste gas outlet (112) is communicated with an air inlet of the fan (200).