KR101211375B1 - A Waste Heat Recovery System For Tenter Exhaust Fumes - Google Patents

Abstract

The present invention relates to a waste heat recovery system of the tenter exhaust gas, and for this purpose, a tenter chamber having a plurality of injection pipes for supplying high temperature hot air therein so as to dry the fiber fabric, and connected to the tenter chamber. A first duct configured to induce and discharge high-temperature exhaust gas containing tar generated after drying of the fiber fabric; A first branch duct and a second branch duct integrally connected on the root of the first duct to branch the first duct into two; First heat exchange means installed in each of the branch ducts and installed in a plurality of sections so as to collect tar by fusion of tar included in the exhaust gas to a surface through heat exchange with high temperature exhaust gas; Carbonization means arranged in sections between each of the first heat exchange means to carbonize the tar together with the tar fused to the surface of the first heat exchange means by simultaneously applying heat to the tar; A second duct connected to each injection pipe so as to replace the heat collected by the first heat exchange means by using a second heat exchange means to supply high temperature hot air to each injection pipe of the tenter chamber; And when the first heat exchange means included in any one of the branch ducts of the first and second branch ducts is operated to collect the tar, the other branch duct blocks the exhaust gas at a high temperature and simultaneously operates only the carbonization means. And a valve installed at the inlet side of the first and second branch ducts so as to carbonize the high temperature to regulate hot air.

Description

A Waste Heat Recovery System For Tenter Exhaust Fumes

The present invention relates to a waste heat recovery system for the tenter group, and more particularly, to recover waste heat from the high-temperature exhaust gas discharged through the drying process of the synthetic fiber fabric in the tenter, and reused in the drying process of the synthetic fiber fabric, In addition, the tar contained in the high-temperature exhaust gas can be automatically removed through the collection and carbonization process so that no maintenance is required and the pollution of the emitted exhaust gas can be minimized to protect the atmospheric environment. It relates to a tenter exhaust gas waste heat recovery system of the structure.

Generally, in the prior art, a tenter is mainly used to perform a drying process in the processing of a textile fabric.

The temperature inside the tenter during the drying processing of the textile fabric is maintained at 180 ℃ ~ 220 ℃ to discharge the hot air through the nozzle mainly in the high temperature hot air method to dry the textile fabric.

The temperature of the exhaust gas discharged after the drying process of the fabric is about 150 ° C., and this exhaust gas contains enormous thermal energy.

In order to recover this energy, a heat exchanger is installed to exchange heat with the exhaust gas to heat the combustion air.

In this process, tar, fine dust, and other contaminants contained in the exhaust gas are attached to the heat exchanger heat exchanger surface, which hinders heat transfer, thereby reducing heat exchange efficiency and even shutting down the entire system due to deterioration of the heat exchanger. A condition may occur.

In order to prevent this, a conventional system may be provided with a cleaning system, and the nozzle may be used to clean the inner surface of the heat exchanger with hot water at high pressure or to scrape the inner surface with the inner surface cleaning system to remove foreign substances such as tar.

However, it seems that there is no problem at the beginning of the foreign matter cleaning system, but if you do not pay attention to it, the tar adheres to the heating surface and the contamination continues, or if it progresses further, the foreign material cleaning system can no longer function. It will stop working.

There are many other mechanical problems that can cause the cleaning system to go down. In other words, the heat exchange system or the foreign matter cleaning system has reached an inoperable state and needs to be removed from the system and cleaned.

The present invention has been made in view of the above problems, an object of the present invention is to recover the waste heat from the high-temperature exhaust gas discharged through the drying process of the synthetic fiber fabric in the tenter to reuse in the drying process of the synthetic fiber fabric In addition, it is possible to automatically remove the tar contained in the hot exhaust gas through the collection and carbonization process so that no maintenance is required and the pollution of the emitted exhaust gas can be minimized to protect the atmospheric environment. The present invention provides a tenter exhaust gas waste heat recovery system.

According to a feature of the present invention for achieving the above object, the first invention relates to a waste heat recovery system of the tenter exhaust gas, the hot exhaust gas discharged through the drying process of the synthetic fiber fabric in the tenter In a waste heat recovery system for recovering waste heat from the waste water, the tenter chamber is provided with a plurality of injection pipes for supplying hot air to the inside to dry the fabric fabric, and is connected to the tenter chamber to dry the fabric fabric. A first duct for inducing and evacuating a high-temperature exhaust gas containing tar generated; A first branch duct and a second branch duct integrally connected on the root of the first duct to branch the first duct into two; First heat exchange means installed in each of the branch ducts and installed in a plurality of sections so as to collect tar by fusion of tar included in the exhaust gas to a surface through heat exchange with high temperature exhaust gas; Carbonization means arranged in sections between each of the first heat exchange means to carbonize the tar together with the tar fused to the surface of the first heat exchange means by simultaneously applying heat to the tar; A second duct connected to each injection pipe so as to replace the heat collected by the first heat exchange means by using a second heat exchange means to supply high temperature hot air to each injection pipe of the tenter chamber; And when the first heat exchange means included in any one of the branch ducts of the first and second branch ducts is operated to collect the tar, the other branch duct blocks the exhaust gas at a high temperature and simultaneously operates only the carbonization means. And a valve installed at the inlet side of the first and second branch ducts so as to carbonize the high temperature to regulate hot air.

The second invention, in the first invention, the carbonization means is a catalyst consisting of a heat transfer mat in the form of a mesh, and platinum (Pt), palladium (Pd) and platinum-rhodium (Pt-Rh) stored in the heat transfer mat It is characterized by consisting of particles.

The third invention, in the first invention, the first heat exchange means is a radiator for cooling the hot exhaust gas to fuse the tar on the surface, and the first tank connected to the radiator and the inlet side to supply a low-temperature refrigerant; And a second tank for storing heat-exchanged high temperature refrigerant connected to the outlet side of the radiator, and a pump provided at the inlet side of the radiator to push the refrigerant of the first tank to the second tank. It is characterized by.

The fourth invention, in the third invention, the second heat exchange means is composed of a heat pipe is inserted into the second tank is partially inserted into the second tank in which the high temperature refrigerant is stored, the other side is exposed to the inside of the second duct, The heat pipe exposed inside the second duct is characterized in that a plurality of heat radiation fins are provided.

The fifth invention, in the first or fourth invention, the second duct is characterized in that the blower fan is further provided to supply heat to the heat dissipated through the heat pipe to each injection pipe of the tenter chamber.

According to a sixth invention, in the first invention, two pressure sensors are further provided inside the first branch duct and the second branch duct, and each pressure sensor has a first heat exchange means and a carbonization means. Characterized in that arranged on both sides.

Seventh invention, in the sixth invention, each pressure sensor is characterized in that the pressure difference is generated when the tar is fused to the first heat exchange means and the carbonization means, characterized in that for controlling the valve in accordance with the pressure difference.

In an eighth invention, in the first invention, a filter and a wet scrubber are further provided at the rear end of the first duct.

The tenter-based exhaust gas waste heat recovery system of the present invention is configured to be automatically removed through the tar collection and carbonization process included in the high-temperature exhaust gas, thereby requiring no maintenance.

In addition, carbonization dust can be removed through a filter and a scrubber to minimize the pollution of the exhaust gas is effective to protect the atmospheric environment.

1 is a block diagram of a tenter exhaust gas waste heat recovery system according to the present invention,
2 is a configuration diagram of the first heat exchange means and carbonization means extracted from FIG.
3 is a configuration diagram showing the second duct and the second heat exchange means extracted in FIG.
4 is a first operation of the tenter exhaust gas waste heat recovery system according to the present invention,
5 is a second operation of the tenter exhaust gas waste heat recovery system according to the present invention,
FIG. 6 is an enlarged view of a first branch duct and a second branch duct showing a carbonization means arrangement of another embodiment taken from FIG.

Hereinafter, the tenter exhaust gas waste heat recovery system according to the present invention will be described in detail together with the accompanying drawings.

1 is a configuration diagram of a tenter exhaust gas waste heat recovery system according to the present invention, Figure 2 is a configuration diagram of the first heat exchange means and carbonization means extracted from Figure 1, Figure 3 is a second duct extracted from Figure 1 And a second heat exchange means.

As shown in Figures 1 to 3, the present invention is to recover the waste heat from the high-temperature exhaust gas discharged through the drying process of the synthetic fiber fabric in the tenter, reused in the drying process of the synthetic fiber fabric, and also the high temperature exhaust The tar contained in the gas can be automatically removed through the collection and carbonization process so that no maintenance is required and the pollution of the emitted exhaust gas can be minimized to protect the atmospheric environment. Exhaust gas waste heat recovery system.

The tenter exhaust gas waste heat recovery system includes a tenter chamber 10, a first duct 20 connected to the tenter chamber 10, and a first duct 20 connected to a root of the first duct 20. The first branch duct 21 and the second branch duct 22, the first heat exchange means 30 and the carbonization means 40 is installed in each of the branch duct (21, 22) to collect and carbonize the tar; The second heat exchange means 60 replaces the heat collected by the first heat exchange means 30 and supplies it to the tenter chamber 10.

Here, the tenter chamber 10 is a device which pulls the synthetic fiber 12 flat by applying a predetermined tension to the fabric, and drys it by hot air.

At this time, the injection pipe 11 is formed in the longitudinal direction in order to supply high temperature hot air in the upper and lower portions of the tenter chamber 10, the synthetic fiber 12 fabric between the injection pipe 11 is constant It is conveyed by tension.

At this time, tar is included in the high-temperature exhaust gas discharged through the tenter chamber 10 during the drying process of the synthetic fiber 12. Such exhaust gas is induced and discharged through the first duct 20 connected to the tenter chamber 10.

The first duct 20 is connected to the tenter chamber 10 to induce and discharge high-temperature exhaust gas containing tar generated after drying of the fabric of the synthetic fiber 12.

In addition, the first branch duct 21 and the second branch duct 22 are integrally connected on the root of the first duct 20 to branch the first duct 20 into two.

Here, the first branch duct 21 and the second branch duct 22 may be any one of the branch ducts 21 and 22 selected as a movement path of the high-temperature exhaust gas induced and discharged through the first duct 20. It is possible to carry out the process of collecting the tar contained in the exhaust gas or carbonizing it by changing it.

To this end, the first branch duct 21 and the second branch duct 22 have a structure in which the first heat exchange means 30 and the carbonization means 40 are interlaced.

The first heat exchange means 30 has a structure in which a plurality of sections are installed to allow the tar included in the exhaust gas to be fused to the surface through heat exchange with the high temperature exhaust gas to collect the tar.

The first heat exchange means 30 is a radiator 31 that cools the exhaust gas at a high temperature to fuse the tar to the surface, and a first tank 32 connected to the radiator 31 and the inlet side to supply a low temperature refrigerant. ), A second tank 33 which stores the heat exchanged high temperature refrigerant connected to the outlet side of the radiator 31, and the refrigerant of the first tank 32 can be pumped to the second tank 33. It is configured to include a pump 34 provided on the inlet side of the radiator 31 so that.

Here, the radiator 31 is not limited to this, but may be configured by arranging the pipes in a zigzag form so as to increase the surface area.

In addition, the first heat exchange means 30 purifies the coolant in the first tank 32 in which the cool coolant is stored in accordance with the pumping of the pump 34 to the second tank 33 via the radiator 31, thereby providing a high temperature exhaust gas. Is changed into a low temperature exhaust gas and at the same time, the tar contained in the exhaust gas is fused to the surface of the radiator 31 to collect the tar.

At this time, the refrigerant stored in the second tank 33 is replaced with a high temperature exhaust gas to store a refrigerant of a relatively high temperature. At this time, the second tank 33 has a second refrigerant to reuse the heat of the high temperature refrigerant. Heat exchange means 60 is connected.

Then, the heat collected by the first heat exchange means 30 is replaced by the second heat exchange means 60, and high temperature hot air can be supplied to each injection pipe 11 of the tenter chamber 10. The second duct 50 is connected to each of the injection pipes 11.

Here, the second heat exchange means 60 is partially inserted into the second tank 33 in which the high temperature refrigerant is stored, and the other side thereof is a heat pipe 61 inserted to expose the inside of the second duct 50. Although configured, the heat pipe 61 exposed to the inside of the second duct 50 is provided with a plurality of heat dissipation fins 62.

In addition, the second duct 50 is further provided with a blower fan 51 to convert the heat radiated through the heat radiation fins 62 of the heat pipe 61 to hot air to convert the respective heat pipes of the tenter chamber 10 ( 11) can be configured to supply.

On the other hand, the carbonization means 40 is arranged in sections between each of the first heat exchange means 30 to melt the tar on the surface and at the same time apply heat to the tar together with the tar fused to the surface of the first heat exchange means 30 Carbonizes.

The carbonization means 40 is a catalyst consisting of a heat transfer mat 41 in the form of a mesh, and platinum (Pt), palladium (Pd) and platinum-rhodium (Pt-Rh) stored in the heat transfer mat 41. It consists of particles 42. In this case, the catalyst particles 42 may be formed by coating the surface of the heat transfer mat 41, and the function of the catalyst particles 42 is used because carbon can be carbonized even in a temperature range of 300 ° C. to 400 ° C.

That is, the carbonization means 40 heats the heat transfer mat 41 to carbonize the tar fused to the surfaces of the heat transfer mat 41 and the catalyst particles 42, and raises the main surface temperature to increase the first heat exchange means ( Tar fused to the surface of the radiator 31 which is 30) also serves to carbonize.

In addition, the carbonization means 40 and the first heat exchange means 30 may be of a size that is standardized to be superimposed and replaceably modular.

On the other hand, when the first heat exchange means 30 included in any one of the branch ducts 21 and 22 of the first and second branch ducts 21 and 22 is operated to collect tar, the other branch duct 21, 22) is installed at the inlet side of the first and second branch ducts (21, 22) to shut off the exhaust gas at the same time and to operate only the carbonization means 40 to carbonize the tar to control the hot air. One is the valve 23.

That is, when the valve 23 blocks the inlet side of the first branch duct 21, the first heat exchange means 30 installed in the first branch duct 21 stops operation and only the carbonization means 40 is operated. Thus, the tar fused to the first heat exchange means 30 and the carbonization means 40 is carbonized.

At the same time, the second branch duct 22 is opened to introduce the exhaust gas discharged from the first duct 20. At this time, the carbonization means 40 installed in the second branch duct 22 is stopped, and only the first heat exchange means 30 is operated to cool the exhaust gas and to fuse and collect the tar contained in the exhaust gas. .

That is, the first branch duct 21 and the second branch duct 22 perform the carbonization process of the tar according to the opening and closing of the valve 23, or perform the process of fusion of the tar.

In addition, the operation of the valve 23 is controlled by the pressure sensor 70 installed in each branch duct (21, 22). The first branch duct 21 and the second branch duct 22 are each provided with two pressure sensors 70, each of the pressure sensor 70 is the first heat exchange means 30, Carbonization means 40 is disposed on both sides with a function of sensing the pressure around.

In the pressure sensor 70, when the tar is fused to the first heat exchange means 30 and the carbonization means 40, pressure difference occurs in the front and rear, and the first heat exchange means 30 and Recognizing that a lot of tar is fused to the surface of the carbonization means 40 to block the inflow of exhaust gas through the valve 23 to perform a carbonization process.

On the other hand, the tar dust carbonized in the tar by the tar or carbonization means 40 contained in the exhaust gas of the low temperature through the tar fusion process by the first heat exchange means 30 on the discharge side of the first duct 20 The filter 80 may be further mounted.

In addition, the exhaust gas not filtered by the filter 80 may be completely removed through the cleaning dust collector 90 installed at the end of the first duct 20 so that only the clean exhaust gas is discharged to the outside. Of course.

Hereinafter, the operation relationship of the tenter exhaust gas waste heat recovery system according to the present invention will be described in detail with the accompanying drawings.

Figure 4 is a first operation of the tenter exhaust gas waste heat recovery system according to the present invention.

As shown in FIG. 4, each of the injection pipes 11 disposed in the tenter chamber 10 is connected to a heat generating means (heater) to supply high temperature hot air.

This high temperature hot air dries the synthetic fibers 12 in the tenter chamber 10 and is discharged as exhaust gas. In this case, the exhaust gas includes tar in the drying process of the synthetic fiber 12, and the exhaust gas containing the tar is induced and discharged through the first duct 20.

The hot exhaust gas induced and discharged through the first duct 20 is induced and discharged to the formulation first branch duct 21 by a valve 23 that blocks the inlet side of the second branch duct 22.

The high temperature exhaust gas induced and discharged to the first branch duct 21 is replaced with heat by a low temperature refrigerant flowing through the radiator 31, which is the first heat exchange means 30, so that the first heat exchange means 30 and the carbonization means ( Tar is fused to the surface of 40).

At the same time, in the second branch duct 22 in which the high temperature exhaust gas is blocked by the valve 23, the carbonization means 40 is operated so that the tar fused to the surfaces of the carbonization means 40 and the first heat exchange means 30 is removed. Will be removed.

At this time, the tar dust generated in the second branch duct 22 is discharged together with the low temperature exhaust gas induced and discharged through the first branch duct 21. This is because the pressure in the first branch duct 21 is lowered due to the high velocity of the exhaust gas flowing into the first branch duct 21 and the pressure in the second branch duct 22 is relatively high. 22) Tar dust inside is naturally discharged and can be discharged with low temperature exhaust gas.

The exhaust gas is discharged as a clean exhaust gas while removing tar dust through the filter 80 and the cleaning dust collector 90.

In addition, the second tank 33 connected to the radiator 31 in the first branch duct 21 is replaced with a high temperature exhaust gas to store a refrigerant having a relatively high temperature. In this case, the second tank 33 is stored in the second tank 33. The high temperature refrigerant is heat replaced by the heat pipe 61 of the second heat exchange means 60 and reused.

More specifically, the heat dissipation fins 62 of the heat pipe 61 connected to the second tank 33 are exposed in the second duct 50, and the heat dissipated through the heat dissipation fins 62 is the second duct 50. Is supplied to the respective injection pipes 11 of the tenter chamber 10 by the blowing fan 51 provided in the). Therefore, it is possible to increase the energy efficiency of the heat generating means 13 is installed to supply hot air to each injection pipe (11).

5 is a second operation diagram of a tenter exhaust gas waste heat recovery system according to the present invention.

As shown in FIG. 5, when tar is fused to the first heat exchange means 30 and the carbonization means 40 in the first branch duct 21, the first heat exchange means 30 and the carbonization means 40 Pressure difference occurs in the front and rear, this pressure difference is sensed by the pressure sensor (70).

The pressure sensor 70 recognizes that a large amount of tar is fused to the surfaces of the first heat exchange means 30 and the carbonization means 40 when a pressure difference greater than the set reference pressure occurs. The inlet side of the first branch duct 21 is closed through the valve 23 so as not to be introduced into the exhaust gas.

If the valve 23 blocks the inlet side of the first branch duct 21, the first heat exchange means 30 installed in the first branch duct 21 stops operation and only the carbonization means 40 is operated. The tar fused to the surfaces of the first heat exchange means 30 and the carbonization means 40 is carbonized.

In this case, when the carbonization means 40 is operated, the radiator 31 of the first heat exchange means 30 receives the high temperature refrigerant stored in the second tank 33 through the pump 34 so that heat can be discharged. The tank 32 can be recycled backward.

At the same time, the second branch duct 22 is opened to introduce the exhaust gas discharged from the first duct 20. At this time, the carbonization means 40 installed in the second branch duct 22 is stopped, and only the first heat exchange means 30 is operated to cool the exhaust gas and to fuse the tar contained in the exhaust gas.

6 is an enlarged view showing a carbonization means arrangement state of another embodiment extracted from FIG.

As shown in FIG. 6, the carbonization means 40 includes a plurality of gas burner tubes 44 and catalyst particle layers 42 disposed between the heat resistant mat layer 43 in a mesh form and the heat resistant mat layer 43. It is composed of

The heat resistant mat layer 43 is disposed between the first heat exchange means 30, the gas burner tube 44, and the catalyst particle layer 42. The heat resistant mat layer 43 functions to minimize heat loss and filter tar by preventing heat generated when the gas burner pipe 44 is operated from each branch duct 21 and 22.

 In addition, the gas burner tube 44 may be disposed between the heat resistant mat layer 43, the first heat exchange means 30, and the catalyst particle layer 42, and the heat resistant mat layer 43 and the first heat exchange means 30. It may be configured to carbonize the tar fused to the surface of the catalyst particle layer 42.

Although the present invention has been described in connection with the preferred embodiments mentioned above, various other modifications and variations will be possible without departing from the spirit and scope of the invention. It is, therefore, to be understood that the appended claims are intended to cover such modifications and changes as fall within the true scope of the invention.

10: tenter chamber 11: injection tube 12: synthetic fiber
13: heat generating means
20: first duct 21: first branch duct 22: second branch duct
23: valve
30: first heat exchange means 31: radiator 32: first tank
33: second tank 34: pump
40: carbonization means 41: heat transfer mat 42: catalyst particles, catalyst particle layer
43: heat resistant mat layer 44: gas burner tube
50: second duct 51: blowing fan
60: second heat exchange means 61: heat pipe 62: heat radiation fin
70: pressure sensor
80: filter
90: cleaning dust collector

Claims (9)

In the waste heat recovery system for recovering waste heat from the high-temperature exhaust gas discharged through the drying process of the synthetic fiber fabric in the tenter,
A tenter chamber provided with a plurality of injection tubes for supplying high temperature hot air therein so as to dry the textile fabric,
A first duct connected to the tenter chamber to induce and discharge a high-temperature exhaust gas containing tar generated after drying of the textile fabric;
A first branch duct and a second branch duct integrally connected on the root of the first duct to branch the first duct into two;
First heat exchange means installed in each of the branch ducts and installed in a plurality of sections so as to collect tar by fusion of tar included in the exhaust gas to a surface through heat exchange with high temperature exhaust gas;
Carbonization means arranged in sections between each of the first heat exchange means to carbonize the tar together with the tar fused to the surface of the first heat exchange means by simultaneously applying heat to the tar;
A second duct connected to each injection pipe so as to replace the heat collected by the first heat exchange means by using a second heat exchange means to supply high temperature hot air to each injection pipe of the tenter chamber;
When the first heat exchange means included in any one of the branch ducts of the first and second branch ducts is operated to collect tar, the other branch duct blocks the exhaust gas at a high temperature and simultaneously operates only the carbonization means. A tenter exhaust gas waste heat recovery system, comprising: a valve installed at an inlet side of the first and second branch ducts so as to be carbonized to control hot air.
The method of claim 1,
The carbonization means is a tenter group consisting of a mesh-type heat transfer mat and catalyst particles made of platinum (Pt), palladium (Pd) and platinum-rhodium (Pt-Rh) stored in the heat transfer mat. Exhaust gas waste heat recovery system.
The method of claim 1,
The first heat exchange means includes a radiator for cooling hot exhaust gas to fuse tar on a surface, a first tank connected to the radiator and an inlet side to supply a low temperature refrigerant, and a heat exchanger connected to the outlet side of the radiator. And a second tank for storing the high temperature refrigerant, and a pump provided at an inlet side of the radiator to pressurize the refrigerant of the first tank to the second tank. system.

The method of claim 3,
The second heat exchange means is composed of a heat pipe which is inserted into the other side is partially inserted into the second tank in which the high temperature refrigerant is stored, and one side is exposed to the inside of the second duct,
The heat pipe exposed to the inside of the second duct tenter exhaust gas waste heat recovery system, characterized in that a plurality of heat radiation fins are provided.
The method according to claim 1 or 4,
The second duct is a tenter exhaust gas waste heat recovery system, characterized in that the blower fan is further provided to supply heat radiated through the heat pipe to each injection pipe of the tenter chamber.
The method of claim 1,
Two pressure sensors are further provided inside the first branch duct and the second branch duct, and each pressure sensor is disposed on both sides of the first heat exchange unit and the carbonization unit. Exhaust gas waste heat recovery system.
The method according to claim 6,
The pressure sensor is a pressure difference is generated when the tar is fused to the first heat exchange means and the carbonization means, the tenter exhaust gas waste heat recovery system, characterized in that for controlling the valve in accordance with the pressure difference.
The method of claim 1,
A tenter exhaust gas waste heat recovery system, further comprising a filter and a wet scrubber at a rear end of the first duct.
The method of claim 1,
The carbonization means is a tenter exhaust gas waste heat recovery system, characterized in that composed of a mesh-type heat-resistant mat layer and a plurality of gas burner tubes and catalyst particle layers disposed between the heat-resistant mat layer.

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