Gas cyclone cloth bag integrated treatment equipment for dust-containing steam and dust removal method

Abstract

The invention provides dust-containing steam gas cyclone cloth bag integrated treatment equipment and a dust removal method, and relates to the technical field of dust removal. The dust-containing steam gas cyclone cloth bag integrated treatment equipment comprises a cloth bag dust remover and a cyclone dust remover communicated with a gas inlet of the cloth bag dust remover; an air outlet of the cyclone dust collector is provided with a conical pipe which extends downwards and has a gradually reduced diameter; an upper opening of the conical pipe is communicated with an air inlet of the bag-type dust collector; the cyclone dust collector comprises a hot flue gas inlet and a dust-containing steam inlet; the hot flue gas inlet and the dust-containing steam inlet are respectively positioned on the side wall of the cyclone dust collector opposite to the height of the conical pipe; the air inlet direction of the hot flue gas inlet and the air inlet direction of the dust-containing steam inlet are in the same horizontal direction and are respectively arranged along the tangential direction of the cyclone dust collector shell. The low-temperature dust-containing steam is heated to become dust-containing dry gas, and pre-dedusting is realized; the technical problems that a large amount of condensed water is generated during dust removal of gas in dust-containing steam, dust adheres to the surface of a filtering element, the dust removal effect is poor, the filtering element is blocked, and the dust remover loses efficacy are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal, and in particular to a gas cyclone bag integrated treatment device for dusty steam and a dust removal method. Background Art

[0002] In the field of pulverized coal pyrolysis, whether it is the drying of coal or the extraction of part of the water vapor in the low-temperature section of the pyrolysis kiln for water-containing pulverized coal, a large amount of coal dust is contained in the water vapor. The treatment of this kind of dust often adopts bag filters, spray towers, impact wet dust collectors, wet electrostatic precipitators, water film cyclone dust collectors, Venturi dust collectors, scrubbers, etc.

[0003] When only using a bag filter, when the dusty gas of saturated or nearly saturated steam enters the bag filter with a low ambient temperature, when the steam temperature approaches the dew point temperature, a large amount of condensed water will be generated, resulting in dust adhering to the surface of the filter element, poor dust cleaning effect, blockage of the filter element, and failure of the dust collector.

[0004] Similar to spray towers, water film cyclone dust collectors, etc., for pulverized coal with a fineness less than 100 microns, especially when the particulate matter is less than 20 microns, it is difficult to dissolve in water, the dust is easy to fly, the environment is harsh, and the difficulty and cost of water treatment make it difficult for enterprises to survive.

[0005] Wet electrostatic precipitators are usually used as "fine" dust collectors supporting other wet dust collectors, and have strict requirements on the dust concentration at the equipment inlet. In addition, they have high energy consumption, complex equipment, high maintenance costs, and are not suitable for hydrophobic dust. Especially when the dust is conductive, it will cause production and safety accidents due to the internal generation of electric sparks.

[0006] In view of this, the present invention is specifically proposed. Summary of the Invention

[0007] One of the purposes of the present invention is to provide a gas cyclone bag integrated treatment device for dusty steam to solve the technical problem that a large amount of condensed water is generated during the gas dust removal in the existing dusty steam, resulting in dust adhering to the surface of the filter element, poor dust cleaning effect, blockage of the filter element, and failure of the dust collector.

[0008] Another purpose of the present invention is to provide a dust removal method for dusty steam.

[0009] In order to achieve the above purposes of the present invention, the following technical solutions are specifically adopted:

[0010] In the first aspect, the present invention provides a gas cyclone bag integrated treatment device for dusty steam, including a bag filter and a cyclone dust collector communicated with the air inlet of the bag filter;

[0011] The air outlet of the cyclone dust collector is provided with a conical tube that extends downward and gradually decreases in diameter. The upper mouth of the conical tube is communicated with the air inlet of the bag filter.

[0012] The cyclone dust collector includes a hot flue gas inlet and a dusty steam inlet, and the hot flue gas inlet and the dusty steam inlet are respectively located on the side wall of the cyclone dust collector opposite to the height of the conical tube.

[0013] The inlet directions of the hot flue gas inlet and the dusty steam inlet are in the same horizontal direction, and are respectively arranged along the tangential direction of the outer shell of the cyclone dust collector.

[0014] Furthermore, the bag filter further includes a cylindrical shell I, and the upper mouth of the conical tube is communicated with the lower end of the cylindrical shell I.

[0015] Preferably, a temperature measuring element I for monitoring the temperature of the mixed gas is provided on the cylindrical shell I and is located below the bag filter.

[0016] Preferably, an exhaust port is provided above the bag filter.

[0017] Furthermore, the cyclone dust collector further includes a cylindrical shell II. The outer wall of the upper mouth of the conical tube is hermetically connected to the inner wall of the cylindrical shell II, and the lower end of the cylindrical shell I is connected to the upper end of the cylindrical shell II.

[0018] The hot flue gas inlet and the dusty steam inlet are respectively located on the cylindrical shell II, and the inlet directions of the hot flue gas inlet and the dusty steam inlet are respectively arranged along the tangential direction of the cylindrical shell II.

[0019] Preferably, the height of the cylindrical shell II is the same as the height of the conical tube.

[0020] Furthermore, the horizontal height of the upper edge of the hot flue gas inlet and the upper edge of the dusty steam inlet ≤ the horizontal height of the upper end of the conical tube.

[0021] Furthermore, spiral guide vanes are respectively provided in the hot flue gas inlet and the dusty steam inlet.

[0022] Preferably, the spiral directions of the spiral guide vanes provided in the hot flue gas inlet and the spiral guide vanes provided in the dusty steam inlet are opposite.

[0023] Preferably, the spiral guide vane is a single spiral guide vane, and the spiral angle of the single spiral guide vane is 10° to 30°, preferably 15°.

[0024] Furthermore, the ratio of the lower mouth diameter to the upper mouth diameter of the conical tube is 0.68 to 0.77:1.

[0025] Preferably, the ratio of the vertical height of the conical tube to the upper diameter of the conical tube is 0.27 to 0.34:1.

[0026] Furthermore, the cyclone dust collector further includes a conical ash hopper hermetically connected to the lower end of the cylindrical housing II.

[0027] Preferably, the upper diameter of the conical ash hopper matches the diameter of the cylindrical housing II.

[0028] Preferably, a dust discharge valve for controlling the opening and closing of the lower opening of the conical ash hopper is provided at the lower opening of the conical ash hopper.

[0029] Preferably, a second temperature measuring element for monitoring the temperature of the mixed gas is provided on the conical ash hopper and is located below the conical tube.

[0030] In a second aspect, the present invention provides a method for dust removal of dusty steam, including opening the hot flue gas inlet of the above-mentioned gas cyclone bag integrated treatment equipment, introducing hot flue gas to preheat to 130°C to 160°C, and opening the dusty steam inlet to introduce dusty steam for treatment.

[0031] Furthermore, it also includes controlling the inlet air temperature of the bag filter to be 110°C to 180°C and the moisture content of the dust removal ash to be 5% to 16%.

[0032] Preferably, the temperature of the hot flue gas is 150°C to 300°C.

[0033] Furthermore, the method for controlling the inlet air temperature of the bag filter includes adjusting the hot flue gas flow rate according to the temperature of the first temperature measuring element and / or the humidity of the dust removal ash discharged from the conical ash hopper.

[0034] The gas cyclone bag integrated treatment equipment for dusty steam provided by the present invention, the conical tube is both the outlet of the cyclone dust collector, and at the same time, it is also the inlet of the bag filter and the dust discharge port for the dust to fall in the bag filter; through the hot flue gas inlet and the dusty steam inlet, the hot flue gas and the dusty steam enter the cyclone dust collector along the tangential direction to be fully mixed, so that the low-temperature dusty steam is heated up to become dusty dry gas. At the same time, under the action of the cyclone dust collector, pre-dust removal of the dusty dry gas is realized, and it enters the bag filter along the conical tube, reducing the dust removal pressure of the bag filter; after the low-temperature dusty steam is mixed and preheated to become dusty dry gas, it can avoid condensation and dew formation in the filter bag, causing the problem of bag clogging, and realize normal dust filtration like a dry dust collector. At the same time, compared with the existing dust removal solutions, the water treatment problem brought by the purification of dusty steam is basically eliminated; the hot flue gas can use the self-produced industrial waste flue gas at 150 to 300°C to realize the full utilization of the basically valueless waste gas. Compared with traditional dust removal equipment, the overall structure of this equipment is simple, the operation is reliable, the dust collection is easy, the obtained dust contains 5 - 16% moisture, does not generate dust, and greatly reduces the equipment investment and operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 FIG. 8 is a schematic diagram of the overall structure of a gas cyclone - bag integrated treatment device for dusty steam provided in Embodiment 1 of the present invention;

[0037] Figure 2 FIG. 12 is a schematic cross - sectional structure diagram of a gas cyclone - bag integrated treatment device for dusty steam provided in Embodiment 1 of the present invention.

[0038] Reference numerals: 1 - cylindrical shell; 11 - first cylindrical shell; 12 - second cylindrical shell;

[0039] 2 - bag filter;

[0040] 3 - cyclone separator; 311 - hot flue gas inlet; 312 - dusty steam inlet; 313 - spiral guide vane;

[0041] 4 - conical tube; 5 - conical ash hopper; 6 - ash discharge valve; 7 - first temperature measuring element; 8 - second temperature measuring element; 9 - exhaust port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present invention shall have the meanings commonly understood by those of ordinary skill in the art. The meanings and scopes of the terms should be clear. However, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or extrinsic definition. In this application, unless otherwise specified, the use of "or" means "and / or". In addition, the use of the term "comprising" and other forms is non - restrictive.

[0043] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0044] On the one hand, the present invention provides a gas cyclone - bag integrated treatment device for dusty steam, including a bag filter 2 and a cyclone separator 3 communicated with the air inlet of the bag filter 2;

[0045] The air outlet of the cyclone dust collector 3 is provided with a conical pipe 4 that extends downward and gradually reduces in diameter. The upper opening of the conical pipe 4 is communicated with the air inlet of the bag filter 2.

[0046] The cyclone dust collector 3 includes a hot flue gas inlet 311 and a dusty steam inlet 312. The hot flue gas inlet 311 and the dusty steam inlet 312 are respectively located on the side wall of the cyclone dust collector 3 opposite to the height of the conical pipe 4.

[0047] The inlet directions of the hot flue gas inlet 311 and the dusty steam inlet 312 are in the same horizontal direction and are respectively arranged along the tangential direction of the outer shell of the cyclone dust collector 3.

[0048] The conical pipe 4 is both the air outlet of the cyclone dust collector 3, and at the same time, the air inlet of the bag filter 2, and also the ash discharge port for the dust to fall in the bag filter. Through the hot flue gas inlet 311 and the dusty steam inlet 312, the hot flue gas and the dusty steam enter the cyclone dust collector along the tangential direction to be fully mixed, so that the low-temperature dusty steam is heated to become dusty dry gas. At the same time, under the action of the cyclone dust collector 3, pre-dust removal of the dusty dry gas is realized, and it enters the bag filter 2 along the conical pipe 4, reducing the dust removal pressure of the bag filter 2. After the low-temperature dusty steam is mixed and preheated to become dusty dry gas, it can avoid condensation and dew formation in the filter bag, causing the problem of bag clogging, and realize normal dust filtration like a dry dust collector. At the same time, compared with the existing dust removal scheme, the water treatment problem caused by the purification of dusty steam is basically eliminated. The hot flue gas can use the self-produced industrial waste flue gas at 150 - 300 °C to realize the full utilization of the basically worthless waste gas. Compared with the traditional dust removal equipment, the overall structure of this equipment is simple, the operation is reliable, the dust collection is easy, the obtained dust contains 5 - 16% moisture, does not generate dust, and greatly reduces the equipment investment and operation cost.

[0049] In some specific embodiments, the filter bags of the bag filter 2 are made of materials with high temperature resistance, acid and alkali resistance, and good hydrophobicity. Specifically, any one of PTFE, PPS, or acrylic.

[0050] In some specific embodiments, the bag filter 2 further includes a cylindrical shell 11. The upper opening of the conical pipe 4 is communicated with the lower end of the cylindrical shell 11.

[0051] In some specific embodiments, a temperature measuring element 7 for monitoring the temperature of the mixed gas is provided on the cylindrical shell 11 and is located below the bag filter 2.

[0052] In some specific embodiments, an exhaust port 9 is provided above the bag filter 2.

[0053] In some specific embodiments, the cyclone dust collector 3 further includes a cylindrical housing II 12. The outer wall of the upper opening of the conical tube 4 is sealingly connected to the inner wall of the cylindrical housing II 12, and the lower end of the cylindrical housing I 11 is connected to the upper end of the cylindrical housing II 12.

[0054] The hot flue gas inlet 311 and the dust-containing steam inlet 312 are respectively located on the cylindrical housing II 12. The inlet directions of the hot flue gas inlet 311 and the dust-containing steam inlet 312 are respectively arranged along the tangential direction of the cylindrical housing II 12.

[0055] Preferably, the height of the cylindrical housing II 12 is the same as the height of the conical tube 4.

[0056] In some specific embodiments, the horizontal height of the upper edge of the hot flue gas inlet 311 and the upper edge of the dust-containing steam inlet 312 ≤ the horizontal height of the upper end of the conical tube 4.

[0057] In some specific embodiments, spiral guide vanes 313 are respectively provided in the hot flue gas inlet 311 and the dust-containing steam inlet 312. The arrangement of the spiral guide vanes 313 enables the hot flue gas and the dust-containing steam to have a self-rotation effect when entering the cyclone dust collector 3. The two airflows are not only centrifugally mixed around the upper part of the ash hopper, but also further mixed and stirred around the self-rotation, making the mixing of the two gases more uniform.

[0058] In some specific embodiments, the spiral directions of the spiral guide vanes 313 provided in the hot flue gas inlet 311 and the spiral guide vanes 313 provided in the dust-containing steam inlet 312 are opposite; the opposite spiral directions enable the two airflows to be mixed more fully, and the swirling speed is greatly reduced. After entering the bag dust removal part from the cyclone dust removal part, the formation of vortices is reduced, and the degree of damage to the filter element is greatly reduced.

[0059] In some specific embodiments, the spiral guide vane 313 is a single spiral guide vane, and the spiral angle of the single spiral guide vane is 10° to 30°.

[0060] Among them, the spiral angle of the single spiral guide vane can be, but is not limited to, 10°, 12°, 14°, 15°, 16°, 18°, 20°, 22°, 24°, 26°, 28° or 30°, and can also be any degree between 10° and 30°, preferably 15°.

[0061] In some specific embodiments, the ratio of the lower diameter of the conical tube 4 to the upper diameter of the conical tube 4 is 0.68-0.77:1. On the one hand, it prevents the lower diameter from being too small, resulting in excessive wind speed of the mixed gas entering the bag dust collector, causing poor dust unloading of the bag dust collector, secondary dust, and direct blowing of the mixed gas to the filter bag, shortening the service life of the filter bag; on the other hand, it prevents the lower diameter from being too large or the cone angle of the conical tube from being too large, increasing the wind resistance of the cyclone dust collector, causing serious wear of the equipment, and shortening the service life of the equipment.

[0062] In some specific embodiments, the ratio of the vertical height of the conical tube 4 to the upper diameter of the conical tube 4 is 0.27-0.34:1. On the one hand, the height of the conical tube is prevented from being too small, and the incoming hot flue gas and dust-containing steam directly enter the bag dust removal without passing through the cyclone dust removal. Not only can the hot flue gas and dust-containing steam not be mixed evenly, the local temperature is uneven, and the cyclone pre-dust removal effect cannot be fully exerted, so that the bag dust removal effect is reduced; on the other hand, the height of the conical tube 4 is prevented from being too large, which increases the equipment volume and cost. When the height of the conical tube 4 is too large, the height of the ash hopper becomes relatively small, and the ash in the ash hopper is difficult to settle, which not only has a great impact on the pre-dust removal, but also the dust dropped by the bag dust removal is difficult to fall into the ash hopper, which is extremely unfavorable to the overall dust removal effect.

[0063] In some specific embodiments, the cyclone dust collector 3 further includes a conical ash hopper 5 sealedly connected to the lower end of the cylindrical shell 12 .

[0064] In some specific embodiments, the diameter of the upper opening of the conical ash hopper 5 matches the diameter of the cylindrical shell 12; in some specific embodiments, the lower opening of the conical ash hopper 5 is provided with an ash discharge valve 6 for controlling the opening and closing of the lower opening of the conical ash hopper 5; in some specific embodiments, the conical ash hopper 5 is provided with a temperature measuring element 8 for monitoring the temperature of the mixed gas, and is located below the conical tube 4.

[0065] According to another aspect of the present invention, a dust removal method for dust-containing steam is also provided, comprising opening the hot flue gas inlet 311 of the above-mentioned gas cyclone bag integrated treatment equipment, introducing hot flue gas to be preheated to 130°C to 160°C, and opening the dust-containing steam inlet 312 to introduce dust-containing steam for treatment.

[0066] In some specific implementations, the air intake temperature of the bag filter 2 is controlled to be 110° C. to 180° C., and the moisture content of the dust is 5% to 16%.

[0067] In some specific embodiments, the temperature of the hot flue gas is 150°C to 300°C.

[0068] In some specific embodiments, the method for controlling the inlet temperature of the bag filter 2 includes adjusting the hot flue gas flow rate according to the temperature of the first temperature measuring element 7 and / or the humidity of the dust removed from the conical ash hopper 5.

[0069] The present invention will be further described below through embodiments. Unless otherwise specified, the materials in the embodiments are prepared according to existing methods or directly purchased from the market.

[0070] Embodiment 1

[0071] Combined Figure 1 and Figure 2 For illustration, a gas cyclone bag integrated treatment device for dusty steam has an overall cylindrical shape. The cylindrical main body is a cylindrical shell 1. The device is composed of two main parts integrated together, namely the upper bag filter 2 and the lower cyclone separator 3. Inside the connection part between the bag filter 2 and the cyclone separator 3, a conical pipe 4 with a larger upper part and a smaller lower part is provided. The cylindrical shell 1 can be connected in sections. The part above the upper opening of the conical pipe 4 is the first cylindrical shell 11, and the part below the upper opening of the conical pipe 4 is the second cylindrical shell 12. The outer circle of the upper opening of the conical pipe 4 is fixedly and sealedly connected to the inner circle of the second cylindrical shell 12. The height of the second cylindrical shell 12 is the same as the height of the conical pipe 4. The ratio of the lower opening diameter of the conical pipe to the upper opening diameter of the conical pipe 4 is 0.7:1, and the ratio of the height of the conical pipe 4 to the upper opening diameter of the conical pipe 4 is 0.3:1. At the height position of the conical pipe 4, a hot flue gas inlet 311 and a dusty steam inlet 312 are arranged tangentially along the second cylindrical shell 12, and are respectively communicated with the hot flue gas pipeline and the dusty steam pipeline;

[0072] Below the second cylindrical shell 12, a conical ash hopper 5 with a downwardly converging opening is provided. The upper opening diameter of the conical ash hopper 5 is the same as the diameter of the second section of the cylindrical shell 12 and is fixedly connected. A dust discharge valve 6 is provided below the conical ash hopper 5. The cavity formed among the second cylindrical shell 12, the conical pipe 4, the conical ash hopper 5, the hot flue gas inlet 311 and the dusty steam inlet 312 is the cyclone separator 3; the part above the conical pipe 4 forms the bag filter 2, and the filter bag material of the bag filter 2 is made of PTFE.

[0073] The upper edges of the hot flue gas inlet 311 and the dusty steam inlet 312 are lower than the upper opening of the conical pipe 4 in the height direction or flush with the upper opening of the conical pipe 4. In this embodiment, the upper edges of the hot flue gas inlet 311 and the dusty steam inlet 312 are flush with the upper opening of the conical pipe 4 in the height direction.

[0074] Spiral guide vanes 313 are respectively arranged inside the hot flue gas inlet 311 and the dusty steam inlet 312, and the spiral guide vanes 313 are single spiral guide vanes; among them, the spiral directions of the spiral guide vanes 313 arranged inside the hot flue gas inlet 311 and the spiral guide vanes 313 arranged inside the dusty steam inlet 312 are exactly opposite, one is left-handed and the other is right-handed; the spiral angle of the single spiral guide vane is 15°.

[0075] The temperature measuring element 7 at the bag filter 2 is used to monitor the temperature of the uniformly mixed gas, and the temperature measuring element 8 at the ash hopper is used to monitor the temperature at the gas mixing place, so as to regulate the intake air volume or temperature of the flue gas. An exhaust port 9 is arranged at the top of the bag filter 2.

[0076] Example 2

[0077] A dust removal method for dusty steam is described by taking the gas cyclone bag integrated treatment equipment for dusty steam provided in Example 1 as an example. The hot flue gas is the self-produced industrial waste flue gas at 150 - 300 °C, and specifically includes the following steps:

[0078] Before starting the machine, first open the hot flue gas inlet 311, introduce hot flue gas to preheat to 130 °C - 160 °C, and then open the dusty steam inlet 312 to introduce dusty steam for treatment; according to the temperature of the mixed gas at the bag filter and the humidity of the dust removed ash discharged from the ash hopper, adjust the hot flue gas flow rate, and control the intake air temperature of the bag filter to be 110 - 180 °C and the humidity of the dust removed ash to be 5% - 16% moisture content.

[0079] Application example

[0080] During the low - rank coal pyrolysis process using the low - temperature rotating bed technology, the obtained steam has a dust concentration of 10 - 15 g / m 3 ³, a temperature of 80 - 110 °C, a humidity of 50 - 100%, and the steam contains some oil and gas; the temperature of the flue gas for coal pyrolysis is between 150 - 300 °C.

[0081] This application example uses the gas cyclone bag integrated treatment equipment for dusty steam provided in Example 1, and performs dust removal treatment on the above - mentioned dusty steam according to the dust removal method provided in Example 2. The specific operation is carried out according to the following steps:

[0082] Before production, first use the waste heat flue gas at 180 - 260°C to preheat the whole equipment to 130 - 160°C, and then introduce the dust-containing gas. Adjust the flow rate of the hot flue gas according to the temperature of the mixed gas and the humidity of the dust removal ash, and control the inlet temperature of the bag filter at 110 - 180°C. The ash discharge from the ash hopper is continuous dry ash, and the external water content of the discharged ash is about 10%. This not only meets the economic requirements of air mixing but also meets the gas transportation requirements of the dust removal ash. After long-term operation, open the bag filter 2 to check the surface of the filter bag, and no bag sticking phenomenon is found, and the gas collection chamber is clean without dust, meeting the requirements of up-to-standard discharge.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas cyclone bag integrated treatment device for dusty steam, characterized in that: It comprises a bag dust collector (2) and a cyclone dust collector (3) connected to the air inlet of the bag dust collector (2); The air outlet of the cyclone dust collector (3) is provided with a tapered tube (4) extending downward and having a gradually decreasing diameter, and the upper opening of the tapered tube (4) is connected to the air inlet of the bag dust collector (2); The cyclone dust collector (3) comprises a hot flue gas inlet (311) and a dust-containing steam inlet (312), wherein the hot flue gas inlet (311) and the dust-containing steam inlet (312) are respectively located on a side wall of the cyclone dust collector (3) at a height opposite to that of the conical tube (4); The air intake direction of the hot flue gas inlet (311) and the air intake direction of the dust-containing steam inlet (312) are in the same horizontal direction and are respectively arranged along the tangent direction of the outer shell of the cyclone dust collector (3).

2. The gas cyclone bag integrated treatment equipment according to claim 1, characterized in that: The bag filter (2) further comprises a cylindrical shell (11), and the upper opening of the conical tube (4) is connected to the lower end of the cylindrical shell (11); Preferably, a temperature measuring element (7) for monitoring the temperature of the mixed gas is provided on the cylindrical shell (11) and is located below the bag filter (2); Preferably, an exhaust port (9) is provided above the bag filter (2).

3. The gas cyclone bag integrated treatment equipment according to claim 2, characterized in that: The cyclone dust collector (3) further comprises a second cylindrical shell (12), the outer wall of the upper opening of the conical tube (4) is sealedly connected to the inner wall of the second cylindrical shell (12), and the lower end of the first cylindrical shell (11) is connected to the upper end of the second cylindrical shell (12); The hot flue gas inlet (311) and the dust-containing steam inlet (312) are respectively located on the cylindrical shell body 2 (12), and the air intake direction of the hot flue gas inlet (311) and the air intake direction of the dust-containing steam inlet (312) are respectively arranged along the tangent direction of the cylindrical shell body 2 (12); Preferably, the height of the cylindrical shell 2 (12) is the same as the height of the conical tube (4).

4. The gas cyclone bag integrated treatment equipment according to claim 1, characterized in that: The horizontal heights of the upper edges of the hot flue gas inlet (311) and the dust-containing steam inlet (312) are less than or equal to the horizontal height of the upper end of the conical tube (4).

5. The gas cyclone bag integrated treatment equipment according to claim 4, characterized in that: The hot flue gas inlet (311) and the dusty steam inlet (312) are respectively provided with spiral guide vanes (313); Preferably, the spiral guide vanes (313) arranged in the hot flue gas inlet (311) and the spiral guide vanes (313) arranged in the dust-laden steam inlet (312) have opposite spiral directions; Preferably, the spiral guide blade (313) is a single spiral guide blade, and the spiral angle of the single spiral guide blade is 10° to 30°, preferably 15°.

6. The gas cyclone bag integrated treatment equipment according to claim 1, characterized in that: The ratio of the lower diameter of the tapered tube (4) to the upper diameter of the tapered tube (4) is 0.68 to 0.77:1; Preferably, the ratio of the vertical height of the tapered tube (4) to the upper diameter of the tapered tube (4) is 0.27 to 0.34:

1.

7. The gas cyclone bag integrated treatment equipment according to claim 3, characterized in that: The cyclone dust collector (3) also includes a conical ash hopper (5) sealed to the lower end of the second cylindrical shell (12); Preferably, the diameter of the upper opening of the conical ash hopper (5) matches the diameter of the cylindrical shell 2 (12); Preferably, the lower opening of the conical ash hopper (5) is provided with an ash discharge valve (6) for controlling the opening and closing of the lower opening of the conical ash hopper (5); Preferably, the conical ash hopper (5) is provided with a second temperature measuring element (8) for monitoring the temperature of the mixed gas, and is located below the conical tube (4).

8. A method for removing dust from dusty steam, characterized in that: The method comprises opening the hot flue gas inlet (311) of the gas cyclone bag integrated treatment device according to any one of claims 1 to 7, introducing hot flue gas to preheat it to 130°C to 160°C, and opening the dusty steam inlet (312) to introduce dusty steam for treatment.

9. The dust removal method according to claim 8, characterized in that: The method also includes controlling the air intake temperature of the bag filter (2) to be 110° C. to 180° C. and the moisture content of the dust collected to be 5% to 16%; Preferably, the temperature of the hot flue gas is 150°C to 300°C.

10. The dust removal method according to claim 9, characterized in that: The method for controlling the air intake temperature of a bag filter (2) comprises adjusting the hot flue gas flow rate according to the temperature of a temperature measuring element (7) and / or the humidity of the dust discharged from the conical ash hopper (5).

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