CN201921616U - Cyclone dust removal device for high-temperature high-concentration gas - Google Patents

Abstract

The utility model discloses a cyclone dedusting device for high-temperature and high-concentration gas, which comprises a casing, a material inlet is arranged in the middle of the casing, a clean air outlet is arranged at the upper part of the casing, a material outlet is arranged at the lower part of the casing, and a material outlet is arranged at the bottom of the casing. A filter area is provided between the material inlet and the clean air outlet, and the filter area is composed of at least two metal microfiltration membrane filter elements. The utility model improves the traditional gas cyclone dust removal device, and sets a metal microfiltration membrane filter element in the cyclone dust removal device, which greatly improves the pertinence and high efficiency of gas-solid separation, and reduces the dust content of the clean gas to 50mg/nm ³ or less, and can be used in high temperature systems exceeding 300°C; at the same time, the device can also effectively separate most of the solid particles with larger particle sizes through centrifugation before the gas is filtered, reducing the filtration load, so that the device can be used in high temperature Concentrated dusty gas purification, and maintain long-term operation, and achieved good technical results.

Description

A cyclone dust removal device for high temperature and high concentration gas

technical field

The utility model relates to a cyclone dust removal device, in particular to a cyclone dust removal device for high-temperature and high-concentration gas.

Background technique

Industrial dust removal usually adopts the method of centrifugal separation. The application of centrifugal separation device has a history of hundreds of years, because of its simple structure, low cost, can be made of a variety of materials, wide operating range, high separation efficiency, it is still widely used in chemical industry, mining, metallurgy, machinery, light industry and other industries. use. Centrifugal separation devices can be divided into solid-solid separation, solid-gas separation, liquid-gas separation, etc. Among them, the dust-containing gas cyclone dust removal device belongs to the solid-gas centrifugal separation, which uses the action of inertial centrifugal force to separate dust particles from the dust-containing gas. The upper part of its main body is cylindrical and the lower part is conical. The dust-laden gas enters tangentially through the intake pipe, and is restrained by the wall of the vessel for spiral motion in the vertical direction. Under the action of inertial centrifugal force, the particles are thrown to the wall of the container, and then fall along the wall to the ash discharge port at the bottom of the cone to be separated from the air flow. The gas after the primary separation is spirally moved from bottom to top around the central axis for secondary separation, and the separated gas is finally discharged from the top exhaust pipe. Usually, the downward spiral airflow is called outer swirl, and the upward spiral airflow is called inner swirl. The rotation directions of the inner and outer swirl gases are the same. The upper part of the external swirl is the main dust removal area. Centrifugal separation devices are generally used to remove particles with a diameter of 5 μm or more in the airflow. The processing accuracy is not high.

Chinese patent ZL99223796.3 discloses a wet dust purifier, which includes a housing with an air inlet and an air outlet, a rain and fog device is installed in the housing, and a rotating shaft driven by an electric motor is installed on the rotating shaft. There are several water trays, and water spray pipes are arranged between the water trays, and the water trays throw the water sprayed from the water spray pipes to form a purification zone in the flow channel of the pharynx air, and purify the pharynx air. For example, Chinese patent CN 201058307 discloses a centrifugal separator, which includes a shell with an outer protective layer and a central tube. The shell is welded by a cylinder and a vertebral cylinder, and the central tube is welded together with the shell through a cover plate. The upper part of the casing is also welded with a tangential injection pipe, the lower end of the center pipe is provided with a cone, and a swirl pipe is installed between the center pipe and the casing, and its top end is welded with the cover plate. However, if the above-mentioned cyclone dedusting device does not adopt wet purification, the degree of gas purification cannot be guaranteed. If wet purification is adopted, the amount of ash discharged will be increased and water resources will be wasted.

Contents of the invention

The purpose of this utility model is to provide a cyclone dedusting device for high-temperature and high-concentration gas in view of the defects of the existing technology. By setting a centrifugal separation area and a metal microfiltration membrane filter element, most solid particles with large particle sizes can be effectively separated. , reduce the filtration burden, improve the pertinence and effectiveness of gas-solid separation, so that the device can be used for high-temperature and high-concentration gases, and has a stronger dust removal effect.

In order to achieve the above purpose, the utility model proposes a cyclone dust removal device for high-temperature and high-concentration gas, which includes a housing, a material inlet is provided in the middle of the housing, and a clean air outlet is provided in the upper part of the housing. The lower part of the casing is provided with a material outlet, and the casing is provided with a filter area between the material inlet and the clean air outlet, and the filter area is composed of at least two metal microfiltration membrane filter elements.

In the above-mentioned cyclone dust removal device for high-temperature and high-concentration gas, preferably, the space between the material inlet and the clean air outlet of the housing is cylindrical, and the material inlet and the material inlet of the housing are cylindrical. The outlets are inverted cones.

For the above-mentioned cyclone dust removal device for high-temperature and high-concentration gas, preferably, a back-blowing regeneration device for cleaning fouling of the metal microfiltration membrane filter element is installed on the housing.

In the above-mentioned cyclone dust removal device for high-temperature and high-concentration gas, preferably, the back-blowing regeneration device includes a gas surge tank, and the gas surge tank is connected with at least two The metal microfiltration membrane filter element is opposite to the conduit.

In the above-mentioned cyclone dust removal device for high-temperature and high-concentration gas, preferably, a pulse electromagnetic valve is arranged on the conduit.

In the above-mentioned cyclone dust removal device for high-temperature and high-concentration gas, preferably, the device further includes a differential pressure transmitter connected to the pulse solenoid valve through a control cable.

The utility model improves the traditional gas cyclone dust removal device, and sets a metal microfiltration membrane filter element in the cyclone dust removal device, which greatly improves the pertinence and high efficiency of gas-solid separation, and reduces the dust content of the clean gas to 50mg/nm ³ or less, and can be used in high-temperature systems exceeding 300°C; at the same time, the device can also effectively separate most solid particles with large particle sizes, reduce the filtration load, make the device suitable for high-concentration dust-containing gases, and maintain long-term operation , and achieved better technical results.

Description of drawings

The above-mentioned features and advantages of the present utility model will become clearer and easier to understand through the following description of exemplary embodiments thereof in conjunction with the accompanying drawings.

Fig. 1 is the structure diagram of the cyclone dedusting device used for high-temperature and high-concentration gas of the utility model;

Explanation of reference numbers:

1-Material inlet, 2-Conduit, 3-Material outlet, 4-Centrifugal separation area, 6-Filtration area, 7-Clean air outlet, 8-Pulse solenoid valve, 9-Gas regulator tank, 10-Metal microfiltration membrane Filter element, 11-differential pressure transmitter, 12-housing.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, the utility model is used for the cyclone dedusting device of high-temperature and high-concentration gas. A material outlet 3 is provided, and a filter area 6 located between the material inlet 1 and the clean air outlet 7 is arranged in the housing 12 , and the filter area 6 is composed of at least two metal microfiltration membrane filter elements 10 . The space between the material inlet 1 and the clean air outlet 7 of the housing 12 is cylindrical, and the space between the material inlet 1 and the material outlet 3 of the housing 12 is an inverted cone, that is, the centrifugal separation zone 4 . The casing 12 is equipped with a back-blowing regeneration device for cleaning the fouling of the metal microfiltration membrane filter element 10 . The back-blowing regeneration device includes a gas surge tank 9 connected with at least two conduits 2 extending toward the filter area 6 and opposite to the metal microfiltration membrane filter element 10 . A pulse solenoid valve 8 is arranged on the conduit 2 . The device also includes a differential pressure transmitter 11 connected to the pulse solenoid valve 8 through a control cable.

The high-temperature and high-concentration dust-containing gas enters the cyclone dust collector along the tangential direction from the material inlet 1, and makes a spiral movement along the tangential direction. The large-sized dust particles are thrown to the outer wall under the action of centrifugal force and gravity, and slide along the outer wall to the bottom. When a certain amount of large-size dust particles accumulate at the bottom, the bottom valve is opened, and the dust particles are discharged from the material outlet 3; some finer catalyst particles are entrained by the gas near the central axis of the housing 12 and enter the filter zone 6. In the filter area 6, due to the filtering effect of the metal microfiltration membrane filter element 10, the catalyst entrained with the airflow is trapped on the surface of the metal microfiltration membrane filter element 10, and the gas is filtered through the metal microfiltration membrane filter element 10, and the clean gas is filtered by the metal microfiltration membrane filter element 10. Clean air exits 7.

Centrifugal separation zone 4 can effectively separate most solid particles with large particle size, reduce the filter load, make the device suitable for high-concentration dust-containing gas, and maintain long-term operation. The application of the metal microfiltration membrane filter element 10 improves the pertinence and high efficiency of gas-solid separation, so that the dust content of the clean gas can be reduced to below 50mg/nm ³ , and can be used in high-temperature systems exceeding 300°C. The metal microfiltration membrane filter element 10 is grouped and regenerated through the pulse solenoid valve 8 to automatically control the compressed gas to periodically blow back to ensure the continuous operation of the device.

It should be noted that the above content is a further detailed description of the utility model in conjunction with specific embodiments, and it cannot be determined that the specific embodiments of the utility model are limited thereto. Under the above-mentioned guidance of the utility model, those skilled in the art can Various improvements and modifications are made on the basis of the above-mentioned embodiments, and these improvements or modifications fall within the protection scope of the present utility model.

Claims (6)

1. A cyclone dedusting device for high-temperature and high-concentration gas, comprising a housing, characterized in that, the middle part of the housing is provided with a material inlet, the upper part of the housing is provided with a clean air outlet, and the lower part of the housing is provided with There is a material outlet, and the housing is provided with a filter area between the material inlet and the clean air outlet, and the filter area is composed of at least two metal microfiltration membrane filter elements. 2. The cyclone dust removal device for high-temperature and high-concentration gas according to claim 1, wherein the space between the material inlet and the clean air outlet of the housing is cylindrical, and the An inverted cone is formed between the material inlet and the material outlet. 3. The cyclone dedusting device for high-temperature and high-concentration gas according to claim 1, wherein a back-blowing regeneration device for cleaning metal microfiltration membrane filter element fouling is installed on the housing. 4. The cyclone dedusting device for high-temperature and high-concentration gas according to claim 3, wherein the back blowing regeneration device comprises a gas surge tank, and the gas surge tank is connected with at least two The filter area is a conduit opposite to the metal microfiltration membrane filter element. 5. The cyclone dust removal device for high-temperature and high-concentration gas according to claim 4, characterized in that a pulse solenoid valve is arranged on the conduit. 6. The cyclone dust removal device for high-temperature and high-concentration gas according to claim 4, characterized in that the device further comprises a differential pressure transmitter connected to the pulse solenoid valve through a control cable.

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