Anti-condensation dust removal device

Abstract

The invention discloses an anti-condensation dust removal device which comprises an annular flow guide tail fan cover, a tail fan cover outlet flue gas pipe, a multi-pipe turbulence flue gas heating device, a filter chamber inlet flue gas pipe, a cold supplementing and temperature adjusting device, a filter chamber, a filter bag back flushing device, a partition heat tracing device and an exhaust unit, wherein the partition heat tracing device is used for respectively heating different wall surfaces of the filter chamber; the air outlet end of the annular flow guide tail fan cover is connected with the air inlet end of the multi-pipe turbulent flow smoke heating device through a tail fan cover outlet smoke pipe, the air outlet end of the multi-pipe turbulent flow smoke heating device is connected with the air inlet end of the filter chamber through a filter chamber inlet smoke pipe, and the air outlet end of the filter chamber is connected with the exhaust unit. And the cold supplementing and temperature adjusting device is connected with an inlet flue gas pipe of the filter chamber. By adopting the anti-condensation dust removal device disclosed by the invention, the problems of dust hardening, filter bag blockage, box corrosion and excessive emission in the dust removal process of treating high-temperature and high-humidity flue gas by the existing dust remover are solved.

Description

Technical Field

[0001] The invention relates to the technical field of air purification, and in particular to an anti-condensation dust removal device. Background Art

[0002] In the production process of finished powder products such as stone powder and potash fertilizer, terminal drying treatment is required. The drying process is carried out in the drying drum. The high-temperature flue gas generated by natural gas or coal directly heats the wet material of the powder in the drying drum to promote its dehydration. During the dehydration process, the exhaust gas coming out of the drying drum contains a large amount of powder particles and a large amount of water vapor, which is usually in an overheated state. At this time, the temperature of the dust removal device is too low or the temperature fluctuates greatly, which is very easy to cause condensation. Once condensed, the powder is very easy to absorb moisture and harden, causing the surface of the filter bag to be blocked. At the same time, the acidic substances produced by powders such as potash fertilizer are also very easy to cause corrosion of the dust collector box, seriously affecting the service life of the equipment. However, the existing dust removal devices often only perform simple surface insulation treatment, without considering more technical measures for heat loss compensation, increasing flue gas temperature and maintaining temperature stability. It is impossible to eliminate condensation during the operation of the dust removal device, and thus cannot meet the long-term stable operation requirements of the dust removal device. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an anti-condensation dust removal device to solve the problems of dust compaction, filter bag clogging, box corrosion and excessive emissions that occur in existing dust collectors during the dust removal process of high-temperature and high-humidity flue gas.

[0004] The present invention solves the above-mentioned problems through the following technical means: an anti-condensation dust removal device, comprising an annular guide tail wind hood, a tail wind hood outlet smoke pipe, a multi-tube turbulent smoke heating device, a filter chamber inlet smoke pipe, a cooling and temperature regulating device, a filter chamber, a filter bag backblowing device, a zoned heating device for heating different wall surfaces of the filter chamber respectively, and an exhaust unit; the air outlet end of the annular guide tail wind hood is connected to the air inlet end of the multi-tube turbulent smoke heating device through the tail wind hood outlet smoke pipe, the air outlet end of the multi-tube turbulent smoke heating device is connected to the air inlet end of the filter chamber through the filter chamber inlet smoke pipe, and the air outlet end of the filter chamber is connected to the exhaust unit; the cooling and temperature regulating device is connected to the filter chamber inlet smoke pipe; the filter bag backblowing device comprises a blowing air bag, a compressed air pipeline connected to the blowing air bag, and a compressed air secondary heating device arranged on the compressed air pipeline, the compressed air secondary heating device comprises a primary heater and a secondary heater, and the primary heater and the secondary heater are both provided with a heating element and a first temperature sensor.

[0005] Furthermore, the annular air guide tail wind hood includes a tail wind hood cavity and a plurality of U-shaped guide plates arranged at horizontal intervals in the tail wind hood cavity, the guide plates are arranged vertically, and the plurality of guide plates are sequentially socketed; the height dimensions of the plurality of guide plates from the inner circle to the outer circle gradually increase; the dimensions of the opening ends of the plurality of guide plates from the inner circle to the outer circle from the corresponding side walls of the tail wind hood cavity gradually increase, and the left-right spacing dimensions of adjacent guide plates are smaller than the front-to-back spacing dimensions.

[0006] Furthermore, it also includes a vibration motor and a vibration rod connected to the output end of the vibration motor, and the vibration rod is fixedly connected to all the guide plates.

[0007] Furthermore, the multi-tube turbulent flue gas heating device includes a pressure stabilizer, a mixed flow chamber and multiple turbulent branch pipes. The pressure stabilizer is connected to the mixed flow chamber through the turbulent branch pipe. The air inlet end of the mixed flow chamber is connected to the tail wind hood outlet smoke pipe, and the air outlet end of the mixed flow chamber is connected to the filter chamber inlet smoke pipe. The length of the mixed flow chamber is A, and the distance between the turbulent branch pipe and the air inlet end of the mixed flow chamber is 0.1-0.3A, ensuring that the high-temperature wind and the smoke have sufficient mixing distance in the mixed flow chamber.

[0008] Furthermore, the pressurizer includes a pressurizer inlet pipe, a pressurizer body and a plurality of turbulent branch short pipes; the pressurizer inlet pipe is centrally installed on the upper part of the pressurizer body, and the plurality of turbulent branch short pipes are symmetrically installed on both sides of the central axis of the pressurizer inlet pipe; the plurality of turbulent branch pipes include a plurality of external turbulent branch pipes and a plurality of internal turbulent branch pipes; the plurality of external turbulent branch pipes are symmetrically arranged on the outside of the mixed flow chamber, and the plurality of internal turbulent branch pipes are symmetrically arranged on the inside of the mixed flow chamber; the plurality of turbulent branch short pipes are connected to the plurality of turbulent branch pipes one by one, and the plurality of turbulent branch pipes are connected to the mixed flow chamber.

[0009] Furthermore, the cooling and temperature regulating device comprises a cooling pipe connected to the inlet flue gas pipe of the filter chamber, and a cooling regulating valve and a second temperature sensor installed in the cooling pipe; the outer surface of the cooling pipe is provided with pipe insulation.

[0010] Furthermore, an air stop valve is also installed on the cold supply pipe, and the closed cavity formed by the cold supply regulating valve, the cold supply pipe and the air stop valve forms an insulating chamber.

[0011] Furthermore, the outer surface of the filter chamber is provided with a double-layer insulation to prevent cold bridges; the filter chamber comprises an air intake unit, a plurality of filter units, an air outlet unit, and a plurality of ash collecting units; the air intake unit comprises an air intake main pipe and a plurality of air intake branches, the air intake main pipe is connected to the inlet smoke pipe of the filter chamber, and the other end of the air intake main pipe is connected to a plurality of air intake branches, and the air intake branches are connected to a plurality of filter units correspondingly; the filter unit comprises a box body, a filter bag and a bag cage, and a flower plate, the flower plate is installed on the upper part of the box body, the filter bag and the bag cage are fixed below the flower plate, and a vent connected to the filter bag and the bag cage is provided on the flower plate; the air outlet unit comprises a clean air chamber, a valve mechanism, and an air outlet main pipeline, the clean air chamber is installed on the upper part of the filter unit, and the clean air chamber is connected to the air outlet main pipeline through the valve mechanism; the plurality of ash collecting units are arranged corresponding to the plurality of filter units, and the ash collecting unit is located below the filter unit; the outlet of the ash collecting unit is provided with an air locking and ash unloading device, and an ash conveying device is provided below the air locking and ash unloading device.

[0012] Furthermore, the zoned heating device includes a confluence, a diverter, a plurality of branch heating coils and connecting pipes. The outer surfaces of each filter unit and each ash collecting unit are provided with branch heating coils. The diverter is connected to the heat medium inlet end of the branch heating coil through a connecting pipe, and the heat medium outlet end of the branch heating coil is connected to the confluence through a connecting pipe.

[0013] Furthermore, the exhaust unit includes an induced draft fan, an exhaust duct and a chimney, the induced draft fan is installed on the exhaust duct, and the exhaust duct is connected to the main air outlet duct.

[0014] Beneficial effects of the present invention:

[0015] By setting up a multi-tube turbulent flue gas heating device, the high-temperature wind is allowed to pass through the stabilizer air inlet pipe, the stabilizer body and the turbulent branch short pipe in sequence, enter multiple turbulent branch pipes, and then be diverted through multiple turbulent branch pipes to enter the mixed flow chamber and mix with the flue gas, so that the flue gas can be quickly and evenly heated in the mixed flow chamber, the flue gas temperature can be increased, and the risk of condensation can be reduced; further, by setting up a double-layer insulation anti-cold bridge insulation attached to the outer surface of the filter chamber, including plane anti-cold bridge insulation, corner anti-cold bridge insulation, plane frame anti-cold bridge insulation and support contact surface anti-cold bridge insulation, all high-temperature flue gas contacts Double-layer insulation is carried out on the surface to prevent cold bridges, so that the flue gas in the filter room and the outdoor air can be completely insulated and condensed. The compressed air is heated in two stages by setting a compressed air secondary heating device to increase the temperature of the compressed air for pulse injection, which can avoid condensation on the bag surface caused by the isentropic expansion and cooling of the compressed air during the pulse injection process to a certain extent. Zoned heating devices are set on the outer surfaces of the filter unit and the ash collecting unit to effectively compensate for the heat loss on the surface of the dust removal device, maintain the temperature stable during the operation of the dust removal device, and reduce the risk of condensation on the dust removal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In the attached picture:

[0019] Figure 1 A schematic diagram showing the overall assembly structure of the anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram showing a first tail wind cover structure and flow field of an anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0021] Figure 3 A schematic diagram showing a second tail wind cover structure and flow field of the anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0022] Figure 4 A schematic diagram showing the structure of a guide plate of an anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0023] Figure 5 A schematic diagram showing the structure of a third tail wind cover of the anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0024] Figure 6 A schematic structural diagram of a multi-tube turbulent flue gas heating device for preventing condensation and removing dust in an embodiment of the present invention is shown;

[0025] Figure 7 A schematic diagram showing the structure of a voltage stabilizer and a turbulent branch pipe of an anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0026] Figure 8 A schematic diagram showing the flow of flue gas inside a multi-tube turbulent flue gas heating device of an anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0027] Fig. 9 A schematic diagram showing the structure of a cooling and temperature regulating device of an anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0028] Fig.10 A schematic diagram showing the structure of a single-valve cooling and temperature regulating device for an anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0029] Fig.11 A schematic diagram of a plane anti-cold bridge insulation device for preventing condensation and removing dust according to an embodiment of the present invention is shown;

[0030] Fig.12A schematic diagram of preventing cold bridges at corners and heat preservation of an anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0031] Fig.13 A schematic diagram of a plane skeleton cold bridge prevention and heat preservation of an anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0032] Fig.14 A schematic diagram of heat preservation of the support contact surface of the anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0033] Fig.15 A schematic structural diagram of a compressed air secondary heating device of an anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0034] Fig.16 A schematic diagram showing the structure of a zoned heating device of an anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0035] Fig.17 A schematic diagram showing a process flow diagram of a zoned heating device for an anti-condensation and dust removal device according to an embodiment of the present invention;

[0036] Fig.18 A schematic diagram showing the structure of a filter chamber of an anti-condensation dust removal device according to an embodiment of the present invention is shown;

[0037] Fig.19 A schematic diagram showing the structure of an exhaust unit of an anti-condensation and dust removal device according to an embodiment of the present invention is shown;

[0038] Fig. 20 A schematic diagram of a process flow diagram of a combination of a high-temperature wind heat source and an anti-condensation dust removal device in an embodiment of the present invention is shown;

[0039] The above drawings include the following reference numerals:

[0040] 1. Annular guide tail wind cover; 1-1. Tail wind cover cavity; 1-2. Guide plate; 1-3. Vibration motor; 1-4. Vibration rod; 2. Tail wind cover outlet smoke pipe; 3. Multi-tube turbulent smoke heating device; 3-1. Stabilizer; 3-1-1. Stabilizer air inlet pipe; 3-1-2. Stabilizer body; 3-1-3. Turbulence branch short pipe; 3-2. Turbulence branch pipe; 3-2-1. External turbulence branch pipe; 3-2-2. Internal turbulence branch pipe; 3-3. Mixed flow chamber; 3-3-1. External turbulence 3-3-2, internal turbulent circulation mixed flow field; 4, filter chamber inlet smoke pipe; 5, supplementary cooling temperature control device; 5-1, supplementary cooling pipeline; 5-2, supplementary cooling regulating valve; 5-3, air stop valve; 5-4, second temperature sensor; 5-5, insulation chamber; 5-6, pipeline insulation; 6, double-layer insulation anti-cold bridge insulation; 6-1, plane anti-cold bridge insulation; 6-2, corner anti-cold bridge insulation; 6-3, plane frame anti-cold bridge insulation; 6-4, support contact surface anti-cold bridge insulation; 7 , filter chamber; 7-1, filter unit; 7-1-1, box; 7-1-2, filter bag and bag cage; 7-1-3, flower plate; 7-2, ash collection unit; 7-3, air intake unit; 7-3-1, air intake main pipe; 7-3-2, air intake branch pipe; 7-4, air outlet unit; 7-4-1, clean air chamber; 7-4-2, valve mechanism; 7-4-3, air outlet main pipe; 8, injection air bag; 9, compressed air pipeline; 10, compressed air secondary heating device; 10-1, primary heater; 1 0-2, secondary heater; 10-3, heating element; 10-4, first temperature sensor; 10-5, connecting pipe; 11, zoned heating device; 11-1, concentrator; 11-2, splitter; 11-3, branch heating coil; 11-4, connecting pipeline; 12, air locking and ash unloading device; 13, ash conveying device; 14, exhaust unit; 14-1, exhaust duct; 14-2, induced draft fan; 14-3, chimney; 15, hot air furnace; 16, hot air duct; 17, high-temperature fan. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become clearer and more specific. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0042] like Figures 1 to 20As shown, the present embodiment discloses an anti-condensation dust removal device, comprising an annular guide tail wind hood 1, a tail wind hood outlet smoke pipe 2, a multi-tube turbulent smoke heating device 3, a filter chamber inlet smoke pipe 4, a cooling temperature regulating device 5, a filter chamber 7, a filter bag backflush device, a zoned heating device 11 for heating different wall surfaces of the filter chamber respectively, and an exhaust unit 14; the air outlet end of the annular guide tail wind hood 1 is connected to the air inlet end of the multi-tube turbulent smoke heating device 3 through the tail wind hood outlet smoke pipe 2, and the air outlet end of the multi-tube turbulent smoke heating device 3 is connected to the air inlet end of the filter chamber inlet smoke pipe 4 through the filter chamber inlet smoke pipe 5. The air pipe 4 is connected to the air inlet end of the filter chamber 7, and the air outlet end of the filter chamber 7 is connected to the exhaust unit 14; the cooling and temperature regulating device 5 is connected to the inlet smoke pipe 4 of the filter chamber; the filter bag backblowing device includes a blowing air bag 8, a compressed air pipeline 9 connected to the blowing air bag, and a compressed air secondary heating device 10 arranged on the compressed air pipeline, and the compressed air secondary heating device includes a primary heater 10-1 and a secondary heater 10-2, and the primary heater and the secondary heater are both provided with a heating element 10-3 and a first temperature sensor 10-4.

[0043] The annular air guide tail wind hood includes a tail wind hood cavity 1-1 and a plurality of U-shaped guide plates 1-2 arranged at horizontal intervals in the tail wind hood cavity. The guide plates are arranged vertically and the plurality of guide plates are sequentially socketed; the height dimensions of the plurality of guide plates from the inner circle to the outer circle gradually increase; the dimensions of the opening ends of the plurality of guide plates from the inner circle to the outer circle from the corresponding side walls of the tail wind hood cavity gradually increase, and the left-right spacing dimensions of adjacent guide plates are smaller than the front-rear spacing dimensions.

[0044] It also includes a vibration motor 1-3 and a vibration rod 1-4 connected to the output end of the vibration motor, and the vibration rod is fixedly connected to all the guide plates.

[0045] The multi-tube turbulent flue gas heating device includes a pressure stabilizer 3-1, a mixed flow chamber 3-3 and multiple turbulent branch pipes 3-2. The pressure stabilizer is connected to the mixed flow chamber through the turbulent branch pipes. The air inlet end of the mixed flow chamber is connected to the tail air hood outlet flue gas pipe, and the air outlet end of the mixed flow chamber is connected to the filter chamber inlet flue gas pipe.

[0046] The pressurizer comprises a pressurizer intake pipe 3-1-1, a pressurizer body 3-1-2 and a plurality of turbulent branch short pipes 3-1-3; the pressurizer intake pipe 3-1-1 is centrally installed on the upper part of the pressurizer body 3-1-2, and a plurality of turbulent branch short pipes 3-1-3 are symmetrically installed on both sides of the central axis of the pressurizer intake pipe 3-1-1; the plurality of turbulent branch pipes 3-2 comprise a plurality of outer turbulent branch pipes 3-2-1 and a plurality of inner turbulent branch pipes 3-2-2; the plurality of outer turbulent branch pipes 3-2-1 are symmetrically installed on the upper part of the pressurizer body 3-1 ... Arranged on the outside of the mixed flow chamber 3-3, multiple internal turbulent flow branch pipes 3-2-2 are symmetrically arranged on the inside of the mixed flow chamber 3-3; multiple turbulent flow branch short pipes 3-1-3 are connected to multiple turbulent flow branch pipes 3-2 one by one, and multiple turbulent flow branch pipes 3-2 are connected to the mixed flow chamber 3-3; the length of the mixed flow chamber 3-3 is A, and the distance between the turbulent flow branch pipe 3-2 and the air inlet end of the mixed flow chamber is 0.1-0.3A, ensuring that the high-temperature wind and the flue gas have sufficient mixing distance in the mixed flow chamber 3-3.

[0047] The cooling and temperature regulating device 5 comprises a cooling pipe 5-1 connected to the filter chamber inlet smoke pipe 4, a cooling regulating valve 5-2 and a second temperature sensor 5-4 installed on the cooling pipe 5-1; the outer surface of the cooling pipe 5-1 is provided with pipe insulation 5-6.

[0048] An air stop valve 5-3 is also installed on the cooling supply pipe 5-1, and the closed cavity formed by the cooling supply regulating valve 5-2, the cooling supply pipe 5-1 and the air stop valve 5-3 forms an insulating chamber 5-5.

[0049] The outer surface of the filter chamber 7 is provided with a double-layer insulation and anti-cold bridge insulation 6; the filter chamber 7 includes an air intake unit 7-3, multiple filter units 7-1, an air outlet unit 7-4, and multiple ash collection units 7-2; the air intake unit 7-3 includes an air intake main pipe 7-3-1 and multiple air intake branches 7-3-2, the air intake main pipe 7-3-1 is connected to the filter chamber inlet smoke pipe 4, the other end of the air intake main pipe 7-3-1 is connected to multiple air intake branches 7-3-2, and the air intake branches 7-3-2 are connected to multiple filter units 7-1 correspondingly; the filter unit includes a box body 7-1-1, a filter bag and a bag cage 7-1-2, and a flower plate 7-1-3, the flower plate 7-1-3 is installed on the upper part of the box body 7-1-1, the filter bag and the bag cage 7-1 -2 is fixed below the flower plate 7-1-3, and the flower plate 7-1-3 is provided with a vent connected with the filter bag and the bag cage 7-1-2; the air outlet unit 7-4 includes a clean air chamber 7-4-1, a valve mechanism 7-4-2, and an air outlet main pipeline 7-4-3, the clean air chamber 7-4-1 is installed on the upper part of the filter unit 7-1, and the clean air chamber 7-4-1 is connected with the air outlet main pipeline 7-4-3 through the valve mechanism 7-4-2; a plurality of the ash collecting units 7-2 are arranged corresponding to the plurality of the filter units 7-1, and the ash collecting units 7-2 are located below the filter units 7-1; the outlet of the ash collecting unit 7-2 is provided with an air locking and ash unloading device 12, and an ash conveying device 13 is arranged below the air locking and ash unloading device 12.

[0050] Furthermore, the zoned heating device 11 includes a concentrator 11-1, a diverter 11-2, a plurality of branch heating coils 11-3 and a connecting pipe 11-4. The outer surface of each filter unit 7-1 and each ash collecting unit 7-2 is provided with a branch heating coil 11-3. The diverter 11-2 is connected to the heat medium inlet end of the branch heating coil 11-3 through the connecting pipe 11-4, and the heat medium outlet end of the branch heating coil 11-3 is connected to the concentrator 11-1 through the connecting pipe 11-4.

[0051] Furthermore, the exhaust unit 14 includes an induced draft fan 14-2, an exhaust duct 14-1 and a chimney 14-3. The induced draft fan 14-2 is installed on the exhaust duct 14-1, and the exhaust duct 14-1 is connected to the main air outlet duct 7-4-3.

[0052] To make the above technical solution clearer, the specific implementation process of this application is further described below:

[0053] According to the flow path of the flue gas in the device, after the flue gas is generated from the drying drum, it passes through the annular guide tail wind hood 1, the tail wind hood outlet flue gas pipe 2, the multi-tube turbulent flue gas heating device 3, the filter chamber inlet flue gas pipe 4, the filter chamber 7, and the exhaust unit 14 in sequence.

[0054] According to the flow path of dust in the device, the dust generated from the drying drum enters the annular guide tail wind hood 1 with the flue gas, and the large particles of dust are pre-treated and settled as the product under the action of the annular guide tail wind hood 1. The remaining dust passes through the annular guide tail wind hood 1, the tail wind hood outlet flue gas pipe 2, the multi-tube turbulent flue gas heating device 3, the filter chamber inlet flue gas pipe 4, and the filter chamber 7 in sequence. After being filtered in the filter chamber 7, the dust passes through the air locking ash unloading device 12 and the ash conveying device 13 in sequence.

[0055] According to the flow path of compressed air, the compressed air source is connected to the compressed air secondary heating device 10. The heated compressed air passes through the compressed air pipeline 9 and the spray air bag 8 in sequence, and is finally sprayed into the filter chamber 7 through the pulse control device for back-blowing and cleaning of the bag. The temperature drop of the heated compressed air after spraying and expansion will not reach the dew point of the flue gas, so the purpose of spraying to prevent condensation is achieved.

[0056] According to the flow path of the high-temperature wind, the high-temperature wind is generated from the high-temperature heat source and enters the multi-tube turbulent flue gas heating device 3, where it is mixed with the flue gas to increase the temperature of the flue gas.

[0057] According to the normal temperature air flow path of the supplementary cooling and temperature regulating device 5, when it is detected that the flue gas temperature is too high, in order to prevent the high temperature from affecting the equipment components, the normal temperature air passes through the supplementary cooling and temperature regulating device 5 and the filter chamber inlet flue gas pipe 4 in sequence, and mixes with the high temperature flue gas to reduce the flue gas temperature.

[0058] See also Figures 2 to 5 As shown, the annular flow guide tail wind hood 1 has a variety of different forms. Corresponding to different working conditions of flue gas, the first annular flow guide tail wind hood, the second annular flow guide tail wind hood, and the third annular flow guide tail wind hood can be selected.

[0059] See also Figure 2 It is the first type of annular tail wind hood. The interior of the first type of annular tail wind hood is a hollow structure. After the flue gas enters the hollow cavity from the drying drum, the flow velocity decays rapidly. Under the action of gravity sedimentation, larger dust particles settle, thereby achieving the purpose of pretreatment. Figure 2 The flue gas flow direction of the first type of annular guide tail wind hood is shown in Figure 1. The first type of annular guide tail wind hood is suitable for flue gas conditions with larger dust particle sizes.

[0060] See also Figure 3 , Figure 4 The second annular wind deflector cover is shown in FIG. 1 . A three-layer wind deflector plate 1-2 is arranged inside the second annular wind deflector cover. The wind deflector plates 1-2 are arranged in a certain pattern. Figure 3 , Figure 4In the middle, the installation distance dimensions d1>d2>d3, so that multiple guide plates are arranged in a stepped manner in the vertical direction. On the horizontal plane, the installation distance dimensions c3>c2>c1. At the same time, the installation dimensions a1, a2, and a3 are all smaller than the installation distance dimensions b1, b2, and b3, so that the multiple guide plates on the sealing side are tighter. This design allows the smoke to be diverted to the sides and the middle area after entering the guide plate, further increasing the residence time of the smoke in the annular guide tail wind hood 1, and further reducing the speed of the smoke in the annular guide tail wind hood 1, which is beneficial to the sedimentation of medium and large particles of dust, and the vertically arranged guide plates will neither significantly increase the smoke running resistance nor cause dust hanging material blockage. The second type of annular guide tail wind hood is suitable for smoke conditions with dust particles of moderate particle size.

[0061] See also Figure 5 The third annular guide tail wind hood is shown. The third annular guide tail wind hood is based on the second annular guide tail wind hood and adds a vibration motor 1-3 and a vibration rod 1-4. One end of the vibration rod 1-4 is fixedly connected to the guide plate 1-2, and the other end is connected to the vibration motor for vibrating and cleaning the dust adhered to the guide plate 1-2. The third annular guide tail wind hood is suitable for flue gas conditions containing sticky or easily compacted dust.

[0062] See also Figures 6 to 8 As shown, a multi-tube turbulent flue gas heating device 3 is exemplified. After the high-temperature wind is generated from the high-temperature heat source, it enters the stabilizer body 3-1-2 through the stabilizer air intake pipe 3-1-1, decelerates and increases pressure in the stabilizer body 3-1-2, and then enters the outer turbulent branch pipe 3-2-1 and the inner turbulent branch pipe 3-2-2 through the turbulent branch short pipe 3-1-3. The flue gas is evenly mixed with the flue gas in the mixed flow chamber 3-3 through the internal and external high-speed jets, and an outer turbulent circulation mixing flow field 3-3-1 and an inner turbulent circulation mixing flow field 3-3-2 are formed in the mixed flow chamber 3-3, thereby achieving the purpose of rapid and uniform temperature increase of the flue gas. Furthermore, the use of the multi-tube turbulent flue gas heating device 3 can avoid the excessively high temperature of the local flue gas entering the filter chamber 7 due to uneven heating, which causes irreversible high-temperature damage to the local bag and electrical components in the filter chamber 7.

[0063] See also Fig. 9 , Fig.10As shown, an example of a cooling and temperature regulating device 5 is provided. When the second temperature sensor 5-4 detects that the flue gas temperature is too high, in order to prevent the ultra-high temperature flue gas from causing irreversible high temperature damage to the cloth bags and electrical components in the filter chamber 7, the air stop valve 5-3 is opened, and the opening of the cooling regulating valve 5-2 is adjusted according to the temperature feedback, so as to achieve the purpose of cooling and temperature regulating the ultra-high temperature flue gas. Furthermore, when the flue gas is not over-temperature, the cooling regulating valve 5-2 and the air stop valve 5-3 are in a normally closed state, and the cooling pipe 5-1, the cooling regulating valve 5-2, and the air stop valve 5-3 form a closed insulation chamber 5-5, which plays a role in isolating the normal temperature air and preventing condensation on the flue gas side of the cooling regulating valve 5-2. In addition, the pipeline insulation 5-6 also plays a role in heat insulation.

[0064] Fig.10 The invention provides a simpler supplementary cooling temperature regulating device 5, which eliminates the air stop valve 5-3 and reduces the investment cost of the control components. The invention is suitable for the working conditions where the flue gas dew point is relatively low or the flue gas operating temperature is relatively high and stable.

[0065] See also Figures 11 to 14 As shown, double-layer insulation and anti-cold bridge insulation 6 of different structural parts of the filter chamber 7 are exemplified, including: plane anti-cold bridge insulation 6-1; corner anti-cold bridge insulation 6-2; plane frame anti-cold bridge insulation 6-3; support contact surface anti-cold bridge insulation 6-4. The double-layer insulation and anti-cold bridge insulation 6 is attached to the outer surface of the filter chamber 7 and is used for insulation between the filter chamber 7 and the air at normal temperature. The double-layer insulation and anti-cold bridge insulation 6 prevents the formation of cold bridges by performing double-layer insulation on metal heat transfer components such as insulation fixings, corner frames, wall panel ribs, plane frames, and supports, thereby preventing the formation of local condensation in the filter chamber 7 that causes equipment corrosion and component damage.

[0066] See also Fig.15 As shown, an example of a compressed air two-stage heating device 10 includes: a first-stage heater 10-1; a second-stage heater 10-2; a heating element 10-3; a first temperature sensor 10-4; and a connecting pipe 10-5. The volumes of the first-stage heater 10-1 and the second-stage heater 10-2 can meet the compressed air consumption for at least one pulse jet cleaning. The first-stage heater 10-1 and the second-stage heater 10-2 are connected by a connecting pipe 10-5. Pulse jet cleaning is performed using heated compressed air, and the temperature of the compressed air after being sprayed and expanded is ensured to be above the flue gas dew point, thereby preventing local condensation on the bag surface and preventing the bag from becoming hardened.

[0067] See also Fig.15 , Fig.18As shown, one end of the compressed air secondary heating device 10 is connected to the compressed air source, and the other end is connected to multiple blowing air bags 8 through a compressed air pipeline 9. When any one of the blowing air bags 8 completes a pulse spray cleaning and consumes the compressed air in the blowing air bag 8, the subsequent supplementary compressed air comes from the secondary heater 10-2 heated to a specified temperature, thereby ensuring that the temperature of the supplemented compressed air is constant at the set temperature value. At the same time, the compressed air supplemented by the secondary heater 10-2 comes from the primary heater 10-1 heated to a specified temperature, ensuring that the compressed air in the secondary heater 10-2 can be used by any other blowing air bag 8 at any time. The primary heater 10-1 and the secondary heater 10-2 are both equipped with a temperature sensor 10-4 and a plurality of heating elements 10-3, which are used to independently and accurately control the heating temperature of the compressed air of each stage of the heater.

[0068] The arrangement of the compressed air secondary heating device 10 ensures that the temperature of the compressed air used for each pulse jet cleaning is uniform and constant.

[0069] See also Fig.16 , Fig.17 As shown, a zoned heating device 11 is exemplified, including: a flow collector 11-1; a flow divider 11-2; a branch heating coil 11-3; and a connecting pipe 11-4. The heat medium of the zoned heating device 11 can be steam, water, or other solutions. A plurality of branch heating coils 11-3 are respectively attached to the outer surface of each filter unit 7-1 and ash collection unit 7-2 in the filter chamber 7, and are located between the insulation layer and the wall.

[0070] Because the amount of flue gas processed by each filter unit 7-1 and ash collecting unit 7-2 of the filter chamber 7 is different, and the location and orientation of each filter unit 7-1 and ash collecting unit 7-2 will affect its thermal insulation effect. By adopting the zoned heating device 11, the heating amount of each filter unit 7-1 and ash collecting unit 7-2 can be adjusted according to the different heat loss of each filter unit 7-1 and ash collecting unit 7-2 of the filter chamber 7, and the heat loss of the filter unit 7-1 and ash collecting unit 7-2 can be compensated, thereby ensuring the uniform temperature of the entire anti-condensation dust removal device to the greatest extent and preventing local condensation.

[0071] After the heat medium enters the diverter 11-2, it is distributed to the branch heating coils 11-3 corresponding to each filter unit 7-1 and ash collection unit 7-2 according to the temperature control requirements through the connecting pipe 11-4 on the upper part of the diverter and the corresponding control valve. The return heat medium is collected in the confluence 11-1 through the connecting pipe 11-4 and discharged to the designated point.

[0072] The zoned heating device 11 shown in the example is an effective guarantee for the double-layer insulation and anti-cold bridge insulation 6. Through the dual guarantee of the double-layer insulation and anti-cold bridge insulation 6 and the zoned heating device 11, a stable and uniform temperature environment for the operation of the anti-condensation and dust removal device is ensured.

[0073] In some other embodiments, the heat medium may be electric energy, the diverter 11-2 and the concentrator 11-1 may be corresponding bus cables, the connecting pipeline 11-4 may be corresponding electric wires and circuit breakers, and the branch heating coil 11-3 may be corresponding high-temperature electric heating tapes.

[0074] See also Fig.18 As shown, the structure and function of the filter chamber 7 are described, including:

[0075] Filter unit 7-1, including box body 7-1-1, filter bag and bag cage 7-1-2, flower plate 7-1-3; ash collection unit 7-2;

[0076] An air intake unit 7-3, comprising an air intake main pipe 7-3-1 and an air intake branch pipe 7-3-2;

[0077] The gas outlet unit 7-4 comprises a clean gas chamber 7-4-1, a valve mechanism 7-4-2, and a gas outlet main pipeline 7-4-3.

[0078] The filter bag and bag cage 7-1-2 are installed under the flower plate 7-1-3. After the smoke passes through the air intake main pipe 7-3-1, it is distributed to multiple air intake branches 7-3-2. Each air intake branch 7-3-2 is equipped with an adjusting door for smoke flow distribution. The distributed smoke enters the upper area of ​​the ash collection unit 7-2, enters the filter unit 7-1, and after being filtered and purified by the filter bag and bag cage 7-1-2, the clean gas enters the clean air chamber 7-4-1, and the dust is collected in the ash collection unit 7-2. The clean gas in the clean air chamber 7-4-1 is collected to the main air outlet pipe 7-4-3 through the valve mechanism 7-4-2, and the other end of the main air outlet pipe 7-4-3 is connected to the exhaust unit 14. Through the above process, the smoke is filtered and purified in the filter chamber 7.

[0079] See also Fig.19 As shown, the exhaust unit 14 is described, including: an exhaust duct 14-1; an induced draft fan 14-2; and a chimney 14-3. The exhaust unit receives the clean gas exhausted from the filter chamber 7 on the one hand, and discharges the clean gas into the atmosphere on the other hand. At the same time, the induced draft fan 14-2 provides operating power for the anti-condensation dust removal device.

[0080] See also Fig. 20As shown, a combination of a certain high-temperature wind heat source and a multi-tube turbulent flue gas heating device 3 is exemplified, including: a hot air furnace 15, a hot air duct 16, and a high-temperature fan 17. The hot air furnace 15 is a hot air device inherent to the drying drum. In this embodiment, without adding heat source equipment, the hot air furnace 15 of the drying drum itself can be used as a heat source, and the multi-tube turbulent flue gas heating device 3 can be introduced through the hot air duct 16 and the high-temperature fan 17. In this embodiment, the high-temperature fan 17 provides power for high-temperature wind on the one hand, and more importantly, adjusts the flow rate of high-temperature wind entering the multi-tube turbulent flue gas heating device 3 through speed regulation, valve regulation, etc., so as to achieve precise temperature control.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An anti-condensation dust removal device, characterized in that: The invention comprises an annular guide tail wind hood (1), a tail wind hood outlet smoke pipe (2), a multi-tube turbulent smoke heating device (3), a filter chamber inlet smoke pipe (4), a cooling and temperature regulating device (5), a filter chamber (7), a filter bag back-blowing device, a zoned heating device (11) for heating different wall surfaces of the filter chamber respectively, and an exhaust unit (14); the air outlet end of the annular guide tail wind hood (1) is connected to the air inlet end of the multi-tube turbulent smoke heating device (3) through the tail wind hood outlet smoke pipe (2), and the air outlet end of the multi-tube turbulent smoke heating device (3) is connected to the filter chamber inlet smoke pipe (4) through the filter chamber inlet smoke pipe (4). The air inlet end of the filter chamber (7) is connected, and the air outlet end of the filter chamber is connected to the exhaust unit; the cooling and temperature regulating device (5) is connected to the inlet smoke pipe (4) of the filter chamber; the filter bag back-blowing device includes a blowing air bag (8), a compressed air pipeline (9) connected to the blowing air bag, and a compressed air secondary heating device (10) arranged on the compressed air pipeline, and the compressed air secondary heating device includes a primary heater (10-1) and a secondary heater (10-2), and the primary heater and the secondary heater are both provided with a heating element (10-3) and a first temperature sensor (10-4).

2. The anti-condensation dust removal device according to claim 1, characterized in that: The annular air guide tail wind hood comprises a tail wind hood cavity (1-1) and a plurality of U-shaped air guide plates (1-2) arranged at intervals in a horizontal manner in the tail wind hood cavity, wherein the air guide plates are arranged vertically and the plurality of air guide plates are sleeved in sequence; the height dimensions of the plurality of air guide plates gradually increase from the inner circle to the outer circle; the dimensions of the opening ends of the plurality of air guide plates from the inner circle to the outer circle from the corresponding side walls of the tail wind hood cavity gradually increase, and the left-right spacing dimension of adjacent air guide plates is smaller than the front-rear spacing dimension.

3. The anti-condensation dust removal device according to claim 2, characterized in that: It also comprises a vibration motor (1-3) and a vibration rod (1-4) connected to the output end of the vibration motor, wherein the vibration rod is fixedly connected to all the guide plates.

4. The anti-condensation dust removal device according to claim 1, characterized in that: The multi-tube turbulent flue gas heating device (3) comprises a pressure stabilizer (3-1), a mixed flow chamber (3-3) and a plurality of turbulent flow branch pipes (3-2), the pressure stabilizer is connected to the mixed flow chamber via the turbulent flow branch pipes, the air inlet end of the mixed flow chamber is connected to the tail air hood outlet flue gas pipe, and the air outlet end of the mixed flow chamber is connected to the filter chamber inlet flue gas pipe.

5. The anti-condensation dust removal device according to claim 4, characterized in that: The pressurizer comprises a pressurizer intake pipe (3-1-1), a pressurizer body (3-1-2) and a plurality of turbulent branch short pipes (3-1-3); the pressurizer intake pipe (3-1-1) is centrally installed on the upper part of the pressurizer body (3-1-2), and the plurality of turbulent branch short pipes (3-1-3) are symmetrically installed on both sides of the central axis of the pressurizer intake pipe (3-1-1); the plurality of turbulent branch pipes (3-2) comprise a plurality of outer turbulent branch pipes (3-2-1) and a plurality of inner turbulent branch pipes (3-2-2); the plurality of outer The turbulent branch pipes (3-2-1) are symmetrically arranged on the outside of the mixed flow chamber (3-3), and the plurality of inner turbulent branch pipes (3-2-2) are symmetrically arranged on the inside of the mixed flow chamber (3-3); the plurality of turbulent branch short pipes (3-1-3) are connected to the plurality of turbulent branch pipes (3-2) one by one, and the plurality of turbulent branch pipes (3-2) are connected to the mixed flow chamber (3-3); the length of the mixed flow chamber (3-3) is A, and the distance between the turbulent branch pipes (3-2) and the air inlet end of the mixed flow chamber is 0.1-0.3A.

6. The anti-condensation dust removal device according to claim 1, characterized in that: The supplementary cooling and temperature regulating device (5) comprises a supplementary cooling pipe (5-1) connected to the filter chamber inlet smoke pipe (4), and a supplementary cooling regulating valve (5-2) and a second temperature sensor (5-4) installed on the supplementary cooling pipe (5-1); the outer surface of the supplementary cooling pipe (5-1) is provided with pipe insulation (5-6).

7. The anti-condensation dust removal device according to claim 6, characterized in that: An air stop valve (5-3) is also installed on the cooling supply pipe (5-1), and a closed cavity formed by the cooling supply regulating valve (5-2), the cooling supply pipe (5-1) and the air stop valve (5-3) forms a heat-insulating chamber (5-5).

8. The anti-condensation dust removal device according to claim 1, characterized in that: The outer surface of the filter chamber (7) is provided with a double-layer thermal insulation anti-cold bridge insulation (6), and the double-layer thermal insulation anti-cold bridge insulation (6) includes plane anti-cold bridge insulation (6-1); corner anti-cold bridge insulation (6-2); plane frame anti-cold bridge insulation (6-3); support contact surface anti-cold bridge insulation (6-4); the filter chamber (7) includes an air intake unit (7-3), a plurality of filter units (7-1), an air outlet unit (7-4), and a plurality of ash collection units (7-2); the air intake unit (7 -3) comprises an air intake main pipe (7-3-1) and a plurality of air intake branches (7-3-2), the air intake main pipe (7-3-1) is connected to the inlet smoke pipe (4) of the filter chamber, the other end of the air intake main pipe (7-3-1) is connected to a plurality of air intake branches (7-3-2), the air intake branches (7-3-2) are connected to a plurality of filter units (7-1) correspondingly; the filter unit comprises a box body (7-1-1), a filter bag and a bag cage (7-1-2), and a flower plate (7-1-3), the The flower plate (7-1-3) is installed on the upper part of the box body (7-1-1), the filter bag and the bag cage (7-1-2) are fixed below the flower plate (7-1-3), and the flower plate (7-1-3) is provided with a ventilating port connected with the filter bag and the bag cage (7-1-2); the air outlet unit (7-4) comprises a clean air chamber (7-4-1), a valve mechanism (7-4-2), and an air outlet main pipeline (7-4-3); the clean air chamber (7-4-1) is installed on the filter At the upper part of the unit (7-1), the clean air chamber (7-4-1) is connected to the main air outlet pipe (7-4-3) through a valve mechanism (7-4-2); a plurality of ash collecting units (7-2) are arranged corresponding to a plurality of filter units (7-1), and the ash collecting units (7-2) are located below the filter units (7-1); an air locking and ash unloading device (12) is arranged at the outlet of the ash collecting unit (7-2), and an ash conveying device (13) is arranged below the air locking and ash unloading device (12).

9. The anti-condensation dust removal device according to claim 1, characterized in that: The zoned heating device (11) comprises a flow collector (11-1), a flow splitter (11-2), a plurality of branch heating coils (11-3) and a connecting pipeline (11-4); the outer surface of each filter unit (7-1) and each ash collection unit (7-2) is provided with a branch heating coil (11-3); the flow splitter (11-2) is connected to a heat medium inlet end of the branch heating coil (11-3) via a connecting pipeline (11-4); and the heat medium outlet end of the branch heating coil (11-3) is connected to the flow collector (11-1) via a connecting pipeline (11-4).

10. The anti-condensation dust removal device according to claim 1, characterized in that: The exhaust unit (14) comprises an induced draft fan (14-2), an exhaust duct (14-1) and a chimney (14-3); the induced draft fan (14-2) is installed on the exhaust duct (14-1); and the exhaust duct (14-1) is connected to the main air outlet duct (7-4-3).

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