CN204469454U - Gas-filtering device - Google Patents

Abstract

The utility model discloses the gas-filtering device that one contributes to promptly and accurately finding " ash is built bridge " phenomenon, comprise multiple spaced filter element and the deashing device for filter element, the internal penetration externally to filter element of gas to be filtered from these filter elements of this gas-filtering device is entered during work, the filtering gas entering filter element interior is discharged after the end of filter element is flowed out from gas-filtering device again, the dust being retained in filter element outside to be then piled up in gradually between filter element and to depart from from filter element under the work of deashing device intermittent, this gas-filtering device also comprises temperature-detecting device, and in the front end temperature element of the described temperature-detecting device gap between filter element and in the course of the work the dust being formed on filter element outside at interval covered.Said apparatus can help the concrete time determining that " ash is built bridge " phenomenon produces, and destroys " ash is built bridge " to start deashing device in time.

Description

Gas filter

technical field

The utility model relates to a gas filtering device.

Background technique

The structure of the existing gas filtering device is generally as follows: a horizontal orifice plate is fixedly installed in the cylinder body, and a plurality of filter elements perpendicular to the orifice plate are arranged at intervals on the orifice plate, and one end of these filter elements is installed in the hole. On the plate with the other end facing down, there is also an independent cavity above the orifice plate that is isolated from the space below the orifice plate by the orifice plate and the filter element. When filtering, the gas to be filtered in the space below the orifice plate Permeate from the outside of these filter elements to the inside of the filter elements, the filtered gas entering the inside of the filter elements flows out from the upper end of the filter elements and then enters the cavity and is output from the cavity. The cavity acts on each filter element to realize back blowing and dust removal of the filter elements.

During production and use, it is found that when the filter device with the above-mentioned structure is in operation for a long time, it is easy for dust to accumulate and bridge between the filter elements (that is, form "ash bridge"), which will cause the problem of blockage and failure of the filter elements. In view of such problems, the current solution is mainly to install a high-pressure gas purging facility on the filter device for the dust accumulated and bridged between the filter elements, so as to destroy the dust accumulated and bridged between the filter elements through high-pressure airflow. However, the existing gas filter devices cannot accurately monitor the specific time when "ash bridging" occurs, resulting in the inability to remove "ash bridging" in a timely and effective manner, further causing problems such as dust scaling and inability to clean ash. .

Utility model content

The utility model aims to provide a gas filtering device which is helpful for timely and accurately discovering the phenomenon of "ash bridging".

The gas filter device of the utility model comprises a plurality of filter elements arranged at intervals and a dust cleaning device for the filter elements. During operation, the gas to be filtered entering the gas filter device penetrates from the outside of these filter elements to the inside of the filter element, and enters the filter element. The filtered gas inside the filter element flows out from the end of the filter element and then is discharged from the gas filter device. The dust trapped outside the filter element gradually accumulates between the filter elements and is filtered from the air under the intermittent work of the dust cleaning device. The element is detached; the gas filter device also includes a temperature detection device, the front end temperature measuring element of the temperature detection device is located in the gap between the filter elements and is covered by the dust formed outside the filter element at intervals during the working process.

Depending on the special installation position of the temperature measuring element, during the operation of the gas filter device, when the front temperature measuring element of the temperature detection device is covered by dust formed outside the filter element, it indicates that "ash bridge" begins to form, which means When the temperature measuring element is covered by dust, the detection temperature of the temperature detection device will be different from the detection temperature of the temperature detection device when the temperature measuring element is not covered by dust, so as to help determine the specific cause of the "ash bridging" phenomenon. Time, in order to start the dust removal device in time to destroy the "ash bridge", and the temperature measuring element will be exposed again after dust removal.

Aiming at the application of the above-mentioned gas filter device under a specific condition, the utility model further provides a gas filter device using a sintered metal porous material filter element, which includes a plurality of filters arranged at intervals and uses a sintered metal porous material as the filter material Filter elements and dust cleaning devices for filter elements. During operation, the gas to be filtered that enters the gas filter device permeates from the outside of these filter elements to the inside of the filter elements, and the filtered gas that enters the inside of the filter elements flows out from the end of the filter elements. Then it is discharged from the gas filter device, and the dust trapped outside the filter element is gradually accumulated between the filter elements and separated from the filter element under the interval work of the dust cleaning device, and the above dust also contains The chemical composition of the exothermic reaction of the material; the gas filter device also includes a temperature detection device. cover.

Practice has found that when the filter element uses sintered metal porous materials (such as sintered iron-aluminum intermetallic compound porous materials) as the filter material, and the gas to be filtered is submerged arc furnace gas, the oxides in the submerged arc furnace gas dust, The alkali metal component will react exothermicly with the above-mentioned filter material. In this case, by arranging the front-end temperature-measuring element of the temperature detection device on the outer surface of the filter element, when the front-end temperature-measurement element of the temperature detection device is formed When the dust on the outside of the filter element is covered, the detection temperature of the temperature detection device will increase significantly due to the above-mentioned exothermic reaction, so that the specific time of the "ash bridging" phenomenon can be accurately determined, so as to start the cleaning device in time Destroy "Ash Bridge".

Further description will be made below in conjunction with the accompanying drawings and specific implementation methods. Additional aspects and advantages of the present invention will be set forth in part in the description which follows, and part will be apparent from the description which follows, or can be learned by practice of the present invention.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the gas filter device of the present invention.

Fig. 2 is a structural schematic diagram of another specific embodiment of the gas filtering device of the present invention.

Fig. 3 is a signal connection diagram of the dust removal controller, the temperature detection device, and the dust removal device in the gas filter device of the present invention.

Detailed ways

As shown in Figures 1 and 3, a high-temperature gas filter device has a horizontally arranged orifice plate (not shown in the figure) fixedly installed in its cylinder 8, and a plurality of holes perpendicular to the orifice plate are installed at intervals on the orifice plate. filter elements 1, one end of these filter elements 1 is installed on the orifice plate and the other end is set downward, there is also a space above the orifice plate that is isolated from each other by the orifice plate and the filter element and the space below the orifice plate Independent cavity (not shown in the figure), when filtering, the gas to be filtered in the space below the orifice plate penetrates from the outside of these filter elements 1 to the inside of the filter element 1, and the filtered gas entering the inside of the filter element 1 passes through the filter element 1. After the upper end flows out, it enters the cavity and is output from the cavity. During back blowing, the back blowing working gas introduced by the back blowing soot cleaning device acts on each filter element 1 through the cavity to realize the protection of the filter elements 1. Back blowing to remove dust. The soot cleaning device 2 of the gas filter device only includes a back blowing soot cleaning device. The filter element 1 of the high-temperature gas filter device is a filter tube that uses iron-aluminum intermetallic compound porous material as the filter material. These filter tubes are vertically arranged in the gas filter device and arranged at intervals along the horizontal direction. There are anti-swing limit structures connected to each filter tube under the bottom of the filter tube. The anti-swing limit structure can adopt a variety of different designs. The purpose is to limit the lower end of each filter tube in the horizontal direction to prevent filter The pipe swings. The anti-sway limit structure specifically adopted in this embodiment includes a support member 9 fixed inside the gas filter device and positioning rods that protrude upward from the support member 9 and are respectively adapted to the lower end positioning holes of the corresponding filter elements 1. 10. Due to the setting of the anti-swing limiting structure, a "gray bridge" is first formed at the gap above the anti-swing limiting structure and close to the lower ends of the filter tubes. Therefore, the high-temperature gas filter device in this specific embodiment also Including a temperature detection device 3, the front temperature measuring element 4 of the temperature detection device 3 is located above the anti-swing limit structure and close to the gap between the lower ends of the filter tubes and is equidistant from the surrounding adjacent filter elements, so that in high temperature gas During the operation of the filter device, the temperature measuring element 4 will be gradually covered by the formed "ash bridging" dust, at this time, the detection temperature of the temperature detection device 3 will be significantly reduced (the dust does not contain the The chemical composition of the exothermic reaction), thus it can be judged that the "ash bridging" is formed, and then the cleaning device 2 is started to destroy the "ash bridging". After the temperature measuring element 4 is exposed, the detection temperature of the temperature detection device 3 returns to normal. In order to facilitate the installation and long-term stable use of the temperature measuring element 4, a rigid support protection sleeve 5 is also provided inside the gas filter device, and one end of the rigid support protection sleeve 5 is bent and extended into the gap between the filter elements 1 The temperature measuring element 4 is installed in the gap, and the other end of the rigid support protection sleeve 5 is connected to the temperature measurement port 6 on the outer wall of the gas filter device. The rigid support protection sleeve 5 is provided with a connection temperature detection device 3 and its In this way, the temperature measuring element 4 is supported by the rigid support protective sleeve 5, and the signal line connecting the temperature detection device 3 and its front temperature measuring element 4 is protected. In addition, as shown in Figure 3, the gas filter device of the present embodiment also includes a soot removal controller 7, which is connected with the temperature detection device 3 and the ash removal device 2 respectively, so that it can pass through The dust removal controller 7 directly controls the start and stop of the dust removal device 2 according to the detected temperature of the temperature detection device 3 to realize automation.

A submerged arc furnace gas filter device as shown in Figures 2 and 3 differs from the high-temperature gas filter device shown in Figure 1 in that the submerged arc furnace gas filter device is trapped outside the filter element 1 during use. The dust contains chemical components (oxides, alkali metal components) that react exothermicly with the filter material, therefore, the front-end temperature measuring element 4 of the temperature detection device 3 is arranged above the anti-sway limit structure and close to the filter tube At the gap between the lower ends, and directly in contact with the outer surface of one of the filter tubes, when the front temperature measuring element 4 of the temperature detection device 3 is covered by the dust formed on the outside of the filter element 1, due to the oxides in the dust, Alkali metals have a certain exothermic reaction with the filter material at high temperature, so that the detection temperature of the temperature detection device 3 rises significantly, thus confirming the occurrence of the "ash bridging" phenomenon, and thus starting the ash cleaning device 2 to destroy the "ash bridging" .

Claims (7)

1. gas-filtering device, comprise multiple spaced filter element (1) and the deashing device (2) for filter element (1), the internal penetration externally to filter element (1) of gas to be filtered from these filter elements (1) of this gas-filtering device is entered during work, enter the inner filtering gas of filter element (1) to discharge from gas-filtering device again after the end of filter element (1) is flowed out, be retained in the outside dust of filter element (1) to be then piled up in gradually between filter element (1) and to depart from from filter element (1) under the work of deashing device (2) intermittent, it is characterized in that: this gas-filtering device also comprises temperature-detecting device (3), the front end temperature element (4) of described temperature-detecting device (3) is arranged in gap between filter element (1) and the dust being formed on filter element (1) outside at interval covered in the course of the work.

2. gas-filtering device as claimed in claim 1, it is characterized in that: the inside of this gas-filtering device is provided with rigid support protective casing (5), the temperature element (4) described in also installing is stretched in the gap between filter element (1) after one end bending of described rigid support protective casing (5), the other end of rigid support protective casing (5) is connected with the Temperature measuring ports (6) on gas-filtering device outer wall, be provided with in rigid support protective casing (5) connect temperature-detecting device (3) and the holding wire of front end temperature element (4).

3. gas-filtering device as claimed in claim 1 or 2, it is characterized in that: this gas-filtering device also comprises dust-removing control device (7), described dust-removing control device (7) is connected with described temperature-detecting device (3) and deashing device (2) signal respectively.

4. gas-filtering device as claimed in claim 1 or 2, it is characterized in that: described filter element (1) is chimney filter, these chimney filters are vertically arranged and are spaced in the horizontal direction in gas-filtering device, the below being positioned at filter element (1) in gas-filtering device is provided with the anti-sway position limiting structure be connected with each chimney filter respectively, above anti-sway position limiting structure and the gap location be close between chimney filter lower end is furnished with described temperature element (4).

5. gas-filtering device as claimed in claim 4, is characterized in that: described anti-sway position limiting structure comprise the supporting member (9) that is fixed on gas-filtering device inside and from supporting member (9) protrude upward and respectively with the backstay (10) that the lower end locating hole of corresponding each filter element (1) is suitable.

6. gas-filtering device as claimed in claim 1 or 2, is characterized in that: described deashing device (2) comprises back-blowing dust removing device.

7. gas-filtering device as claimed in claim 1 or 2, is characterized in that: described filter element (1) uses sintering diamond bit or sintered ceramic porous material to be filtering material.