JP2022117252A - dust collector - Google Patents

Abstract

To provide a dust collector which can prevent a filter from being deteriorated due to a temperature difference between a foreign object-containing gas and a cleaning gas.SOLUTION: A dust collector 1 includes: a housing 2 which is a device body to which a foreign object-containing gas is supplied; a filter 3 which is installed at the housing 2 and captures foreign objects in the foreign object-containing gas; a cleaning gas injection part 4 which injects a cleaning gas AR3 for cleaning the filter 3 to the filter 3; a temperature detection part 61 which detects at least one of a temperature of the filter 3 and a temperature related to the temperature of the filter 3; and a temperature adjustment part 7 which adjusts the temperature of the cleaning gas AR3 based on a detection result of the temperature detection part 61.SELECTED DRAWING: Figure 2

Description

The present invention relates to a dust collector.

Exhaust gases containing soot and dust are generated from various processes of incinerating and melting combustible wastes. Exhaust gas is treated by a bag filter device equipped with a filter cloth and discharged outside the device (see Patent Literature 1, for example). In the bag filter device described in Patent Document 1, soot and dust are removed from the exhaust gas by passing the exhaust gas through the filter cloth.

In the bag filter device described in Patent Document 1, the filter cloth can be cleaned by injecting the pulse jet gas toward the filter cloth.
Further, in the bag filter device described in Patent Document 1, the pulse jet gas can be heated to a temperature equal to or lower than the heat resistance temperature of the filter cloth. By injecting the heated pulse jet gas onto the filter cloth, it is possible to avoid the progress of deliquescence and sticking of the reaction product, which causes clogging of the filter cloth.

JP-A-2004-81958

In the bag filter device described in Patent Document 1, the filter cloth is in contact with both the exhaust gas and the pulse jet gas. There is a problem of becoming

SUMMARY OF THE INVENTION An object of the present invention is to provide a dust collector capable of preventing deterioration of a filter due to a temperature difference between a gas containing foreign matter and a cleaning gas.

In one aspect of the dust collector of the present invention, a device main body to which foreign matter-containing gas containing foreign matter is supplied,
a filter that is installed in the device main body and captures the foreign matter in the foreign matter-containing gas as the foreign matter-containing gas passes through;
a cleaning gas injection unit for injecting a cleaning gas for cleaning the filter onto the filter;
a temperature detection unit that detects at least one of the temperature of the filter and a temperature related to the temperature of the filter;
and a temperature adjustment unit that adjusts the temperature of the cleaning gas based on the detection result of the temperature detection unit.

According to the present invention, the temperature of the cleaning gas can be adjusted by the temperature adjusting section according to the temperature of the gas containing foreign matter. As a result, the temperature difference between the foreign matter-containing gas and the cleaning gas, that is, the difference between the two temperatures can be eliminated as much as possible. As a result, the filter in contact with the foreign matter-containing gas and the cleaning gas can be prevented from deteriorating due to the temperature difference between the two gases.

FIG. 1 is a vertical cross-sectional view showing a first embodiment of a dust collector (normal use state) of the present invention. FIG. 2 is a vertical cross section showing the first embodiment of the dust collector (cleaning state) of the present invention. FIG. 3 is a block diagram of the main part of the dust collector of the present invention. FIG. 4 is a vertical cross section showing a second embodiment of the dust collector of the present invention (normal use state). FIG. 5 is a vertical cross section showing a third embodiment of the dust collector of the present invention (in normal use). FIG. 6 is a vertical cross section showing a fourth embodiment of the dust collector of the present invention (in normal use). FIG. 7 is a vertical sectional view showing a fifth embodiment of the dust collector of the present invention (normal use state).

BEST MODE FOR CARRYING OUT THE INVENTION A dust collector of the present invention will be described in detail below based on preferred embodiments shown in the accompanying drawings. For convenience of explanation, the upper side in FIGS. 1, 2 and 4 to 7 is hereinafter referred to as "upper (or upper)" and the lower side as "lower (or lower)".
<First Embodiment>
A first embodiment of the dust collector of the present invention will be described with reference to FIGS. 1 to 3. FIG.

The dust collector 1 shown in FIG. 1 is, for example, installed in industrial facilities such as iron and steel manufacturing facilities, in addition to processing facilities for processing industrial waste and household waste, and is used for incinerators, crushing facilities, etc. (hereinafter referred to as "incinerator is used to purify foreign matter-containing gas (dust-containing air) AR1 discharged from the air. Then, the purified foreign matter-containing gas AR1 is discharged into the atmosphere, for example, as a foreign matter-removed gas (purified air) AR2.

As shown in FIGS. 1 and 2, the dust collector 1 includes a housing 2 which is a main body of the device, and a plurality of filters 3 for capturing foreign matter EM such as dust (including dust) contained in the foreign matter-containing gas AR1. , a cleaning gas injection unit 4 for injecting a cleaning gas (air) AR3, a discharge unit 5 for discharging purified air AR2, a temperature detection unit 61 for detecting the temperature related to the temperature of the filter 3, and the temperature of the cleaning gas AR3. and a temperature adjustment unit 7 for adjusting the temperature. Further, as shown in FIG. 3 , the dust collector 1 also includes a control section 8 electrically connected to the cleaning gas injection section 4 , the temperature detection section 61 and the temperature adjustment section 7 . The configuration of each part will be described below.

The housing 2 has, for example, a truncated cone shape in this embodiment, and is supported in a posture with its central axis O2 along the vertical direction. The interior of the housing 2 is partitioned into two upper and lower spaces by a partition wall 23 . The lower space is the first chamber 21 through which the foreign matter-containing gas AR1 passes. The upper space is a second chamber 22 through which the foreign matter-removed gas AR2, which has been purified by removing foreign matter EM such as dust from the foreign matter-containing gas AR1, passes.
The partition wall 23 divides the interior of the housing 2 into two spaces vertically, and also functions as a support for supporting each filter 3 . Each filter 3 is arranged at intervals along the horizontal direction. Note that the number of filters 3 to be arranged is not particularly limited.

Further, the bottom portion 24 of the housing 2 is tapered. As a result, when the foreign matter EM falls as will be described later, the foreign matter EM can be concentrated and collected in the central portion of the bottom portion 24 . Then, the foreign matter EM collected in the central portion of the bottom portion 24 is discharged from the housing 2 . Thereby, it is possible to prevent the foreign matter EM from remaining in the housing 2 .

Each filter 3 is a filter medium arranged between the first chamber 21 and the second chamber 22 . Each filter 3 is made of ceramic. As the constituent material of the filter 3, for example, heat-resistant materials (high-temperature materials) such as metal, alumina, silica, and glass can be used in addition to ceramics.
Each filter 3 has a cylindrical shape or rectangular tube shape along the vertical direction, and has an upper end opening to the second chamber 22 and a lower end closed. As the foreign matter-containing gas AR1 passes through the filter 3 from the outside toward the inside, the foreign matter EM contained in the foreign matter-containing gas AR1 is captured by the filter 3 as shown in FIG. As a result, the foreign matter EM can be removed from the foreign matter-containing gas AR1, thereby generating the foreign matter-removed gas AR2. Such a state (operation) is called a "normal use state (dust collection state)".

Further, the housing 2 includes an introduction pipe (introduction flow path) 28 for introducing the foreign matter-containing gas AR1 into the first chamber 21 of the housing 2, and an introduction pipe (introduction flow path) 28 for discharging the foreign matter-removing gas AR2 from the second chamber 22 of the housing 2. A discharge pipe (discharge channel) 52 is connected.
The introduction pipe 28 communicates with the first chamber 21 . Also, the introduction pipe 28 is connected to the incinerator on the opposite side of the housing 2 . Thereby, the foreign matter-containing gas AR1 generated in the incinerator can be supplied into the first chamber 21 of the housing 2 through the introduction pipe 28 .

The discharge pipe 52 is part of the discharge section 5 and communicates with the second chamber 22 . The discharge section 5 has a pump or fan (exhaust fan) (not shown) provided in the middle of the discharge pipe 52 . The discharge pipe 52 is also connected to a chimney (exhaust tower) 53 on its downstream side.
By operating a pump or a fan (exhaust fan), the foreign matter-removed gas AR2 in the second chamber 22 can be rapidly discharged through the discharge pipe 52 and the chimney 53 in this order.

As shown in FIG. 1, when each filter 3 captures the foreign matter EM, the foreign matter EM may adhere to the filter 3 as it is. In this case, the filter 3 may be clogged depending on the degree of adherence of the foreign matter EM. In the dust collector 1 , the clogging of the filter 3 can be eliminated by the cleaning gas ejection part 4 . Such a state (operation) is called a "cleaning state (discarding state)". The cleaning gas ejection part 4 has an introduction pipe 42 for introducing a cleaning gas AR<b>3 for cleaning the filter 3 into the housing 2 .
The introduction pipe 42 is inserted into the second chamber 22 of the housing 2 . The introduction pipe 42 is connected to the cleaning gas supply pipe 43 on the side opposite to the housing 2 . This allows the cleaning gas AR3 to pass through the introduction pipe 42 as compressed air.

The introduction pipe 42 has a nozzle 421 facing each filter 3 . As shown in FIG. 2 , each nozzle 421 can jet the cleaning gas AR3 that has passed through the introduction pipe 42 toward the inside of the filter 3 facing the nozzle 421 . As a result, the foreign matter EM adhering to the filter 3 can be blown off to the outside of the filter 3 and removed, so that clogging of the filter 3 can be eliminated.
Note that the foreign matter EM separated from the filter 3 falls inside the first chamber 21 of the housing 2 and reaches the bottom 24 of the housing 2 . After that, the foreign matter EM is collected in the central portion of the bottom portion 24 and discharged from the housing 2 .

As described above, in the dust collector 1, when the filter 3 is clogged by the foreign matter EM attached to the filter 3, the filter 3 is cleaned from the second chamber 22 side to the first chamber 21 side. Gas AR3 can be ejected. As a result, a cleaning state is established, clogging of the filter 3 can be eliminated, and the subsequent normal use state can be stably continued.

As shown in FIG. 3, the control section 8 is electrically connected to the cleaning gas injection section 4, the temperature detection section 61, and the temperature adjustment section 7, and controls these operations. The control unit 8 has a CPU 81 and a storage unit 82 . The CPU 81 can execute a control program stored in advance in the storage unit 82, for example. The control program includes, for example, a program for putting the dust collector 1 into a normal use state, a program for putting the dust collector 1 into a cleaning state, and the like.

As described above, in normal use, the foreign matter-containing gas AR1 passes through each filter 3 from the outside toward the inside. At this time, the foreign matter-containing gas AR1 is generally at a high temperature of about 170 degrees or higher. Therefore, each filter 3 is in contact with the foreign matter-containing gas AR1 when the foreign matter-containing gas AR1 passes through, and thus is heated by the high-temperature state of the foreign matter-containing gas AR1.

In the cleaning state, each filter 3 is sprayed with a cleaning gas AR3. Therefore, each filter 3 that has been heated in the normal use state comes into contact with the cleaning gas AR3 in the cleaning state. Therefore, each filter 3 is accompanied by a temperature change due to the cleaning gas AR3.
For example, if the cleaning gas AR3 is at room temperature, the temperature changes significantly, which may cause the filters 3 to easily deteriorate.

Therefore, the dust collector 1 is configured to be able to solve such problems. This configuration and operation will be described below.
As shown in FIGS. 1 and 2, the dust collector 1 includes a temperature detection section 61 and a temperature adjustment section 7 .

The temperature detection unit 61 is a temperature sensor (thermistor) that detects a temperature related to the temperature of the filter 3 .
In this embodiment, the temperature detection unit 61 is arranged and fixed to a portion of the exhaust pipe 52 as close to the housing 2 as possible, for example. Thereby, the temperature detection unit 61 can detect the temperature of the foreign matter-removed gas AR2 passing through the discharge pipe 52 as the temperature related to the temperature of the filter 3 .

The foreign matter-removed gas AR2 is a gas in which the foreign matter-containing gas AR1 has passed through each filter 3 to remove the foreign matter EM from the foreign matter-containing gas AR1. make up the department. Therefore, the temperature of the foreign matter-removed gas AR2 can be sufficiently used as the temperature related to the temperature of the filter 3 .

The temperature adjuster 7 is a device that adjusts the temperature of the cleaning gas AR3 based on the detection result of the temperature detector 61 . The temperature adjustment section 7 has a first storage section 71 and a second storage section 72 that temporarily store the cleaning gas AR3, and a heating section 73 that heats the cleaning gas AR3.

The first reservoir 71 and the second reservoir 72 are tanks that independently store the cleaning gas AR3. The first storage section 71 is connected to the supply source 44 of the cleaning gas AR3 via a connection pipe 741 on its upstream side, and the second storage section 72 is connected on its upstream side via a connection pipe 742 to the supply source 44 . It is connected with the source 44 . As a result, the cleaning gas AR3 can be supplied to the first storage portion 71 and the second storage portion 72 and stored temporarily.

The first reservoir 71 is connected to the cleaning gas supply pipe 43 via a connection pipe 743 on its downstream side, and the second reservoir 72 is connected to the cleaning gas supply pipe 43 via a connection pipe 744 on its downstream side. It is connected to the gas supply pipe 43 . As shown in FIG. 2, the cleaning gas AR3 stored in the first storage portion 71 and the second storage portion 72 can be delivered to the introduction pipe 42 by the cleaning gas supply pipe 43 .

A first switching valve 771 is provided in the middle of the connecting pipe 743 , and a second switching valve 772 is provided in the middle of the connecting pipe 744 .
Both the first switching valve 771 and the second switching valve 762 are electromagnetic valves that switch between passing and blocking of the cleaning gas AR3. Thus, it is possible to select whether to obtain the cleaning gas AR3 from the first reservoir 71 or from the second reservoir 72 .

The heating unit 73 includes a first helical tube 731 spirally wound around the outer circumference of the first reservoir 71 , a first electric heating element 732 provided inside the first reservoir 71 , and a second reservoir 72 . and a second electric heating element 734 provided inside the second reservoir 72 .
The first helical tube 731 and the second helical tube 733 are connected to the discharge pipe 52 via a connecting pipe 751 on the upstream side, and are connected to the discharge pipe 52 via a connecting pipe 752 on the downstream side. It is

Thereby, as shown in FIG. 1, the foreign matter removing gas AR2 can be supplied to the first helical tube 731 and the second helical tube 733 through the connecting tube 751. As shown in FIG. As described above, the foreign matter removal gas AR2 is in a high temperature state. As a result, the foreign matter removing gas AR2 can heat the cleaning gas AR3 together with the first reservoir 71 while passing through the first helical tube 731 . Similarly, the foreign matter removing gas AR2 can heat the cleaning gas AR3 together with the second reservoir 72 while passing through the second helical tube 733 .

Then, the heated foreign matter removing gas AR2 is returned to the exhaust pipe 52 via the connecting pipe 752 .
Thus, the heating part 73 is configured to be able to heat the cleaning gas AR3 in the first storage part 71 and the second storage part 72 . The heat of the foreign matter removing gas AR2 can be used for the heating. As a result, the heat of the foreign matter removing gas AR2 can be effectively used without waste.

A first switching valve 761 is provided between the first spiral tube 731 and the connecting tube 751, and a second switching valve 762 is provided between the second spiral tube 733 and the connecting tube 751. there is
The first switching valve 761 is an electromagnetic valve (throttle valve) that switches between passing and blocking of the foreign matter removing gas AR2, and can adjust the supply amount of the foreign matter removing gas AR2 to the first spiral tube 731. FIG.
Similarly, the second switching valve 762 is also an electromagnetic valve (throttle valve) that switches between passage and blocking of the foreign matter removing gas AR2, and can adjust the supply amount of the foreign matter removing gas AR2 to the second helical pipe 733.

The first electric heating element 732 is a heater that generates heat when energized, and can heat the cleaning gas AR3 in the first reservoir 71 .
Similarly, the second electric heating element 734 is also a heater that generates heat when energized, and can heat the cleaning gas AR3 in the second reservoir 72 .

In the heating unit 73 configured as described above, the amount of the foreign matter removal gas AR2 supplied to the first helical tube 731 and the amount of heat generated by the first electric heating element 732 are combined to control the amount of the cleaning gas AR3 in the first storage unit 71. can be heated within a first temperature range. Further, by combining the amount of foreign matter removal gas AR2 supplied to the second helical tube 732 and the amount of heat generated by the second electric heating element 734, the cleaning gas AR3 in the second storage section 72 is heated to a temperature different from the first temperature range. It can be heated within two temperature ranges. In this embodiment, as an example, the relationship "(first temperature range)<(second temperature range)" is satisfied.

The foreign matter-containing gas AR1 generally flows into the housing 2 at a high temperature of about 170 degrees, but the temperature is not always maintained constant and varies within a range of about ±10 degrees. . Accordingly, the temperature of the foreign matter removal gas AR2 also changes.
The control unit 8 obtains the temperature of the foreign matter removal gas AR2 detected by the temperature detection unit 61, and determines whether the temperature is a first temperature lower than a threshold (for example, 170 degrees or higher) or a second temperature higher than the threshold. Determine whether or not

For example, when the temperature of the foreign matter removing gas AR2 is the first temperature and the cleaning state is set, the cleaning gas AR3 heated within the first temperature range is injected from the introduction pipe 42 to each filter 3 .
Further, when the temperature of the foreign matter removing gas AR2 is the second temperature, the cleaning gas AR3 heated within the second temperature range is injected from the introduction pipe 42 to each filter 3 when the cleaning state is established.

Thus, in the dust collector 1, the temperature of the cleaning gas AR3 can be adjusted according to the temperature of the foreign matter-containing gas AR1. As a result, the temperature difference between the foreign matter-containing gas AR1 and the cleaning gas AR3, that is, the temperature difference between the two can be eliminated as much as possible.
As a result, the filters 3 in contact with the foreign matter-containing gas AR1 and the cleaning gas AR3 can be prevented from deteriorating due to the temperature difference between the two gases.
In addition, the above is an example. For example, the heating unit 73 may be composed of only the first storage unit 71 and configured to be able to heat the cleaning gas AR3. In this case, the temperature of the cleaning gas AR3 can be adjusted in accordance with the temperature of the foreign matter-containing gas AR1 by providing another heating part and another cooling part in the middle of the path from the cleaning gas supply pipe 43 to the introduction pipe 42. good too.

<Second embodiment>
Hereinafter, a second embodiment of the dust collector of the present invention will be described with reference to FIG. 4. The description will focus on the differences from the above-described embodiment, and the description of the same items will be omitted.

As shown in FIG. 4 , in the present embodiment, the dust collector 1 includes a moisture content detection unit 63 that detects the amount of moisture contained in the foreign matter removal gas AR2 instead of the flow rate detection unit 62 . The water content detection unit 63 is composed of, for example, an infrared moisture meter and is electrically connected to the control unit 8 .
Here, let us consider a case where the temperature of the cleaning gas AR3 is adjusted simply based on the detection result of the temperature detection section 61. FIG. In this case, when the cleaning gas AR3 is injected to the filter 3, the filter 3 may reach the dew point, and moisture contained in the foreign matter-containing gas AR1 (foreign matter-removing gas AR2) may condense on the filter 3.

Therefore, the temperature adjustment unit 7 adjusts the temperature of the cleaning gas AR3 based on the detection result of the temperature detection unit 61 and the detection result of the water content detection unit 63. FIG. That is, the temperature adjustment unit 7 raises the temperature of the cleaning gas AR3 according to the detection result of the water content detection unit 63, because dew condensation is likely to occur when the water content is large. Conversely, when the water content is small, dew condensation is less likely to occur. Therefore, by keeping the temperature controlled by the temperature control unit 7 constant or lower, the occurrence of dew condensation can be suppressed. Thereby, the occurrence of dew condensation on the filter 3 can be prevented.
Note that the water content detection unit 63 is not limited to the one shown in FIG.

<Third embodiment>
Hereinafter, a third embodiment of the dust collector of the present invention will be described with reference to FIG. 5. The description will focus on the differences from the above-described embodiment, and the description of the same items will be omitted.

As shown in FIG. 5, in the present embodiment, the dust collector 1 includes a component amount detection section 64 that detects the amount of components contained in the foreign matter-removed gas AR2. The component amount detection unit 64 is configured to detect the component amount by, for example, spectroscopic analysis, and is electrically connected to the control unit 8 . Components contained in the foreign matter removal gas AR2 include, for example, a sulfur component and a chlorine component.
In this embodiment, the component amount detection unit 64 is arranged and fixed at the end of the branch pipe 54 branching from the middle of the discharge pipe 52 .

Here, let us consider a case where the temperature of the cleaning gas AR3 is adjusted simply based on the detection result of the temperature detection section 61. FIG. In this case, when the cleaning gas AR3 is injected to the filter 3, the filter 3 reaches the acid dew point, generating sulfuric acid and hydrochloric acid, which may corrode the housing 2 and the like.

Therefore, the temperature adjustment unit 7 adjusts the temperature of the cleaning gas AR3 based on the detection result of the temperature detection unit 61 and the detection result of the component amount detection unit 64. FIG. That is, the temperature adjustment unit 7 raises the temperature of the cleaning gas AR3 by the temperature adjustment unit 7 when the detection result of the component amount detection unit 64 indicates that the amount of the component is large. This makes it difficult for the filter 3 to reach the acid dew point, thereby suppressing the generation of sulfuric acid and hydrochloric acid. Corrosion of the housing 2 and the like can thereby be prevented.
In addition, the component amount detection unit 64 is not limited to the one shown in FIG.

<Fourth Embodiment>
Hereinafter, a fourth embodiment of the dust collector of the present invention will be described with reference to FIG. 6. The description will focus on the differences from the above-described embodiment, and the description of the same items will be omitted.

As shown in FIG. 6, in the present embodiment, the dust collector 1 includes a flow rate detector 62 that detects the flow rate of the foreign matter removing gas AR2. The flow detection unit 62 is configured by, for example, an ultrasonic flowmeter or an electromagnetic flowmeter, and is electrically connected to the control unit 8 .
In this embodiment, the flow rate detector 62 is arranged and fixed facing (adjacent to) the temperature detector 61, for example. This makes it possible to detect the flow rate of the foreign matter removing gas AR2 under the same conditions as the temperature detection section 61 .

For example, when the temperature of the temperature detection unit 61 is a predetermined temperature (for example, 170° C.), the flow rate of the foreign matter removing gas AR2 is too small, resulting in a decrease in the amount of heat. The temperature of the left and right filters 3 indicated by 6 (the filter 3 closer to the wall of the housing 2) undergoes a temperature drop compared to the central filter 3 .
In such a state, even if an attempt is made to remove the foreign matter EM with the cleaning air AR3, the filter 3 and the foreign matter EM themselves are cold, so there is a possibility that the foreign matter EM will be difficult to drop.
Therefore, when the flow rate detecting portion 62 detects that the flow rate of the foreign matter removing gas AR2 is low, the temperature of the temperature adjusting portion 7 is raised to make it easier to remove the foreign matter from the filter 3 . As a result, the temperature of the filter 3 itself can be increased, and the function of the left and right filters 3 near the housing 2 to remove the foreign matter EM with the cleaning air AR3 is prevented from being impaired.
As a result, the temperature of the cleaning gas AR3 can be accurately adjusted regardless of the flow rate of the foreign matter removing gas AR2 (without being affected).

<Fifth Embodiment>
Hereinafter, a fifth embodiment of the dust collector of the present invention will be described with reference to FIG. 7. The description will focus on the differences from the above-described embodiment, and the description of the same items will be omitted.

As shown in FIG. 7, in this embodiment, the dust collector 1 includes a catalyst unit 91 having a catalyst and a heating unit 92 that heats the catalyst unit 91 (catalyst).
The catalyst part 91 is a filter installed between the temperature detection part 61 of the discharge pipe 52 and the connection pipe 751, and allows the foreign matter removal gas AR2 to pass through.

The heating unit 92 is composed of, for example, a heater that generates heat when energized, and is electrically connected to the control unit 8 . As the heating unit 92, other than the heater, for example, a heat exchanger for exchanging heat of high-temperature gas, such as a steam machine, can be used.
The foreign matter-removed gas AR2 is further purified by coming into contact with the catalyst heated by the heating section 92 when passing through the catalyst section 91 .
Further, the foreign matter removing gas AR2 is heated while passing through the catalyst section 91, and the temperature further rises. Part of the foreign matter removing gas AR2 flows into the connecting pipe 751 and is used to heat the cleaning gas AR3.

Thus, in the present embodiment, the heat of the foreign matter removing gas AR2 after coming into contact with the catalyst portion 91 can be used to heat the cleaning gas AR3. As a result, the heat of the foreign matter removing gas AR2 can be effectively used without waste, and the cleaning gas AR3 can be heated to a higher temperature at a low cost.

Although the illustrated embodiment of the dust collector of the present invention has been described above, the present invention is not limited to this, and each part constituting the dust collector may have any configuration capable of exhibiting the same function. can be replaced with Moreover, arbitrary components may be added.
Moreover, the dust collector of the present invention may be a combination of any two or more configurations (features) of the above embodiments.

Although the temperature detection unit 61 is configured to detect the temperature related to the temperature of the filter 3 in each of the above-described embodiments, it is not limited to this. For example, the temperature detection unit 61 may be configured to detect the temperature of the filter 3 itself, or may be configured to detect both the temperature of the filter 3 and a temperature related to the temperature of the filter 3. good too.

When the temperature detection unit 61 detects the temperature of the filter 3 itself, a thermography, for example, can be used as the temperature detection unit 61 .
Further, when the temperature detection unit 61 detects both the temperature of the filter 3 and the temperature related to the temperature of the filter 3, the detection result of the temperature detection unit 61 is the average temperature of these or the temperature can be used, whichever is higher. Then, the temperature adjustment unit 7 adjusts the temperature of the cleaning gas AR3 based on the detection result of this temperature detection unit 61 .

Moreover, the temperature detecting portion 61 may be directly installed on the retainer corresponding to the bone portion of the filter 3 .
Moreover, the temperature detection unit 61 may be installed in the introduction pipe 28 and the introduction pipe 28 . In this case, the temperature of the filter 3 can be predicted based on the values of the temperature detection section 61 provided in the introduction pipe 28 and the temperature detection section 61 provided in the discharge pipe 52 .
As the temperature related to the temperature of the filter 3, the temperature of the introduction pipe 28 may be used, or the temperature inside the housing 2 may be used.

In each of the embodiments described above, the temperature adjustment unit 7 has two reservoirs for temporarily storing the cleaning gas AR3, but the number of reservoirs installed is not limited to two. It may be three or more.

Reference Signs List 1 dust collector 2 housing 21 first chamber 22 second chamber 23 partition wall 24 bottom 28 introduction pipe (introduction flow path)
3 filter 4 cleaning gas injection part 42 introduction pipe 43 cleaning gas supply pipe 44 supply source 5 discharge part 52 discharge pipe (discharge flow path)
53 Chimney (exhaust tower)
54 branch pipe 61 temperature detection unit 62 flow rate detection unit 63 water content detection unit 64 component amount detection unit 7 temperature adjustment unit 71 first storage unit 72 second storage unit 73 heating unit 731 first spiral tube 732 first electric heating element 733 second 2 spiral tube 734 second electric heating element 741 connecting tube 742 connecting tube 743 connecting tube 744 connecting tube 751 connecting tube 752 connecting tube 761 first switching valve 762 second switching valve 771 first switching valve 772 second switching valve 8 control section 81 CPU
82 storage unit 91 catalyst unit 92 heating unit AR1 gas containing foreign matter (dust-containing air)
AR2 Foreign matter removal gas (purified air)
AR3 cleaning gas (air)
EM Foreign matter O2 Central axis

Claims (9)

a device main body to which foreign matter-containing gas containing foreign matter is supplied;
a filter that is installed in the device main body and captures the foreign matter in the foreign matter-containing gas as the foreign matter-containing gas passes through;
a cleaning gas injection unit for injecting a cleaning gas for cleaning the filter onto the filter;
a temperature detection unit that detects at least one of the temperature of the filter and a temperature related to the temperature of the filter;
A dust collector, comprising: a temperature adjustment section that adjusts the temperature of the cleaning gas based on the detection result of the temperature detection section. a discharge passage connected to the device main body, through which the foreign matter-removed gas is discharged after the foreign matter is captured from the foreign matter-containing gas by the filter;
2. The dust collector according to claim 1, wherein the temperature detection unit detects the temperature of the foreign matter removing gas as the temperature related to the temperature of the filter. A flow rate detection unit that detects the flow rate of the foreign matter removal gas,
3. The dust collector according to claim 2, wherein the temperature adjustment section adjusts the temperature of the cleaning gas based on the detection result of the flow rate detection section. a moisture content detection unit that detects the amount of moisture contained in the foreign matter removal gas;
The dust collector according to claim 2 or 3, wherein the temperature adjustment section adjusts the temperature of the cleaning gas based on the detection result of the moisture content detection section. A component amount detection unit that detects the amount of components contained in the foreign matter removal gas,
The dust collector according to any one of claims 2 to 4, wherein the temperature adjustment section adjusts the temperature of the cleaning gas based on the detection result of the component amount detection section. The dust collector according to any one of claims 1 to 5, wherein the temperature adjustment section has a heating section that heats the cleaning gas. The temperature adjustment unit has a plurality of storage units that temporarily store the cleaning gas,
7. The dust collector according to claim 6, wherein the heating section is configured to be able to heat the cleaning gas in each storage section. a discharge passage connected to the device main body, through which the foreign matter-removed gas is discharged after the foreign matter is captured from the foreign matter-containing gas by the filter;
The dust collector according to claim 6 or 7, wherein the heating section uses heat of the foreign matter removing gas to heat the cleaning gas. a catalyst unit having a heated catalyst and being in contact with the foreign matter removing gas is installed in the discharge channel;
9. A dust collector according to claim 8, wherein the heat of said foreign matter removing gas after coming into contact with said catalyst portion is used for heating said cleaning gas.

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