Flue gas dust removal mechanism and kiln device

Abstract

The utility model provides a flue gas dust removal mechanism and a kiln device.The flue gas dust removal mechanism comprises a shell assembly, the shell assembly sequentially comprises an ash bucket section, a filtering section and a purifying section from bottom to top, the bottom of the ash bucket section is provided with a slag outlet, a circulating opening is formed between the filtering section and the ash bucket section, and the purifying section is provided with a gas outlet; the purification assembly is arranged in the filtering section; the flue gas flow guide assembly comprises a flow guide shell and a flue gas inlet pipe, the flow guide shell is located on the outer side of the shell assembly, a flue dust pretreatment space is formed by the flow guide shell and the shell assembly, the circulation opening is located in the lowest position of the flue dust pretreatment space, and an inlet of the flue gas inlet pipe is located outside the flue dust pretreatment space; an outlet of the smoke inlet pipe is located in the smoke dust pretreatment space, and a preset distance is formed between an inlet of the smoke inlet pipe and the outer wall of the filtering section. According to the technical scheme, the problems that the secondary dust raising amount of the ash bucket section is large, and the filtering burden of the purification assembly is large are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas dedusting, and in particular to a flue gas dedusting mechanism and a kiln device. BACKGROUND

[0002] After the kiln is burned, the flue gas contains a large amount of impurities such as NOx, SOx and dust particles, which directly pollute the atmosphere if directly discharged. According to environmental protection requirements, the flue gas of the kiln can be discharged into the atmosphere only after being treated to meet the qualified requirements. The application number 202211247412.6 of the biomass boiler tail extension sulfur-nitrogen dust ultra-low emission purification treatment system and method is used for purification treatment.

[0003] The reaction kettle is an important component of the kiln flue gas treatment system, such as Figure 1 The single reaction kettle structure thereof is composed of a flue gas inlet A, a lower ash bucket B, an upper box body C, a catalyst ceramic pipe D, a flue gas outlet E, a purification chamber F, a flower plate G and a dirty chamber I. The working principle is that the flue gas outlet E is connected with the induced draft fan, the purification chamber F is under negative pressure under the action of the induced draft fan, the dirty flue gas enters the dirty chamber I through the flue gas inlet A, under the negative pressure state of the purification chamber F, the dirty flue gas is filtered and catalyzed through the catalyst ceramic pipe D, the dust particles are intercepted by the catalyst ceramic pipe D and fall into the lower ash bucket B when reaching a certain weight, and the NOx and SOx are rapidly reacted to generate clean gases such as nitrogen, oxygen and water vapor under the action of the catalyst ceramic pipe D catalyst, and then flow into the purification chamber F and are discharged into the atmosphere through the chimney under the action of the induced draft fan.

[0004] The current structure has the following problems: when the dirty flue gas flows through the lower ash bucket B, a large amount of secondary dust is generated, which increases the filtering burden of the ceramic pipe D. CONTENT OF THE INVENTION

[0005] One of the technical problems to be solved by the present application is that the secondary dust of the ash bucket section is large, and the filtering burden of the purification assembly is large.

[0006] To solve the above technical problems, the present application provides a flue gas dedusting mechanism, which comprises: a shell assembly, the shell assembly comprises an ash bucket section, a filtering section and a purification section from bottom to top, the bottom of the ash bucket section has a slag outlet, the filtering section and the ash bucket section have a flow-through opening therebetween, and the purification section has a gas outlet; a purification assembly arranged in the filtering section; a flue gas flow guide assembly, the flue gas flow guide assembly comprises a flow guide shell and a flue gas inlet pipe, the flow guide shell is located outside the shell assembly and forms a dust pretreatment space with the shell assembly, the flow-through opening is located at the lowest part of the dust pretreatment space, the inlet of the flue gas inlet pipe is located outside the dust pretreatment space, the outlet of the flue gas inlet pipe is located inside the dust pretreatment space, and the inlet of the flue gas inlet pipe has a predetermined distance from the outer wall of the filtering section.

[0007] In some embodiments, the flow guide shell comprises a mounting wall, a top wall and two connecting side walls, the two connecting side walls gradually increase in width from bottom to top, the mounting wall is located on the side of the two connecting side walls away from the shell assembly, the top wall is located on the top of the mounting wall and the two connecting side walls.

[0008] In some embodiments, the flue gas flow guide assembly further comprises a homogenizing plate, the homogenizing plate is located between the outlet of the flue gas inlet pipe and the outer wall of the shell assembly.

[0009] In some embodiments, the distance from the homogenizing plate to the outlet of the flue gas inlet pipe is L, the distance between the homogenizing plate and the outer wall of the shell assembly is D, and D is 1.5 to 4.6 times L.

[0010] In some embodiments, the homogenizing plate has a plurality of sieve holes, and the bottom edge of the homogenizing plate has a predetermined distance from the mounting wall.

[0011] In some embodiments, the ratio of the predetermined distance between the bottom edge of the homogenizing plate and the mounting wall to the height of the flow passage is the same as the ratio of the length of the mounting wall corresponding to the homogenizing plate to the overall mounting wall.

[0012] In some embodiments, the flow passage is a plurality of flow passages, the plurality of flow passages are uniformly distributed along the circumference of the shell assembly, and the flue gas flow guide assembly corresponds to the plurality of flow passages.

[0013] In some embodiments, the purification assembly comprises a catalyst ceramic pipe structure.

[0014] In some embodiments, the purification assembly further comprises a gas distribution plate structure, which is arranged on the side of the catalyst ceramic pipe structure away from the ash hopper section.

[0015] According to another aspect of the present application, a kiln device is also provided, comprising a kiln and a flue gas dust removal mechanism communicating with the flue gas outlet of the kiln, the flue gas dust removal mechanism being the above-mentioned dust removal mechanism.

[0016] The beneficial effects of the present application are as follows:

[0017] Through the above technical scheme, the flue gas dust removal mechanism provided by the present application sets the flue gas flow guide assembly in the filtering section, and the flue gas enters the flue gas dust pretreatment space through the flue gas inlet pipe, so that buffering, pre-dusting and the like are carried out in the flue gas dust pretreatment space, the secondary dust raising of the ash hopper section is reduced, the impact force of the flue gas on the ash hopper section is further reduced, the secondary dust raising of the ash hopper section is also reduced, and the purification burden of the purification assembly is greatly reduced. The technical scheme of the present application effectively reduces the problem of large secondary dust raising of the ash hopper section and large filtration burden of the purification assembly. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 A structural schematic diagram of a flue gas dust removal mechanism of the prior art is shown;

[0020] Figure 2 A structural schematic diagram of a flue gas dust removal mechanism disclosed by the embodiments of the present application is shown;

[0021] Figure 3 A structural schematic diagram of a flue gas dust removal mechanism of the prior art is shown; Figure 2 A structural schematic diagram of a flue gas dust removal mechanism of the prior art is shown;

[0022] Figure 4 A structural schematic diagram of a flue gas dust removal mechanism of the prior art is shown; Figure 3 A structural schematic diagram of a flue gas dust removal mechanism of the prior art is shown.

[0023] Explanation of reference signs:

[0024] 10, housing assembly; 11, hopper section; 12, filter section; 13, purification section; 20, purification assembly; 21, catalyst ceramic tube structure; 22, gas distribution flower plate structure; 30, flue gas flow guide assembly; 31, flow guide housing; 32, flue gas inlet pipe; 33, distribution plate; 100, flue dust pretreatment space. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be further described in detail below with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, and the present application can be implemented in many different forms, and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] The present application provides these embodiments in order to make the present application thorough and complete, and fully express the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation.

[0027] It should be noted that in the description of the present application, unless otherwise specified and limited, the meaning of "a plurality of" is greater than or equal to two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] In addition, "first", "second", and similar words used in the present application do not indicate any order, number or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0029] It should also be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. When it is described that a specific device is located between a first device and a second device, there can be or can not be an intermediate device between the specific device and the first device or the second device.

[0030] All terms used in the present application have the same meaning as understood by those skilled in the art to which the present application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or excessively formalized sense, unless specifically defined here.

[0031] Techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be considered as part of the specification.

[0032] The following gives a specific embodiment.

[0033] Please refer to Figures 2-4The utility model provides a flue gas dust removal mechanism, include: casing assembly 10, purification subassembly 20 and flue gas flow guide subassembly 30. Casing assembly 10 includes ash bucket section 11, filter section 12 and purification section 13 from bottom to top in proper order, ash bucket section 11's bottom has the slagging mouth, filter section 12 and ash bucket section 11 between have the through -flow mouth, and purification section 13 has the gas outlet. Purification subassembly 20 sets up in filter section 12. Flue gas flow guide subassembly 30 includes flow guide casing 31 and flue gas inlet pipe 32, flow guide casing 31 is located the outside of casing assembly 10, and with casing assembly 10 forms the smoke dust pretreatment space 100, and the through -flow mouth is located the lowest place of smoke dust pretreatment space 100, and the import of flue gas inlet pipe 32 is located the outside of smoke dust pretreatment space 100, and the export of flue gas inlet pipe 32 is located the inside of smoke dust pretreatment space 100, and the import of flue gas inlet pipe 32 and filter section 12's outer wall have predetermined distance.

[0034] Through the above technical scheme, the flue gas dust removal mechanism provided by the embodiment sets the flue gas flow guide subassembly in the filter section, the flue gas enters the smoke dust pretreatment space 100 through the flue gas inlet pipe, so that buffering, pre-dust removal and the like are carried out through the smoke dust pretreatment space, the secondary dust raising of the ash bucket section is reduced, and the impact of the flue gas on the outer wall of the filter section is further reduced, so that the secondary dust raising of the ash bucket section is also reduced, and the purification burden of the purification subassembly is further greatly reduced. The technical scheme of the embodiment effectively reduces the problems of the secondary dust raising of the ash bucket section being relatively large and the filtration burden of the purification subassembly being relatively large.

[0035] As Figure 3 shown, in the technical scheme of the embodiment, the flow guide casing 31 includes a mounting wall, a top wall and two connecting side walls, the two connecting side walls gradually increase in width from bottom to top, the mounting wall is located on the side of the two connecting side walls away from the casing assembly 10, the flue gas inlet pipe 32 is mounted on the mounting wall, and the top wall is located at the top of the mounting wall and the two connecting side walls. The space of the smoke dust pretreatment space 100 gradually decreases from top to bottom, and the dust removal effect is better. It should be noted that the bottom edge of the mounting wall is welded or integrally formed with the outer wall of the casing assembly 100. The two connecting side walls are completely similar, similar to an inverted triangular plate, and the arc-shaped plate is adopted in the embodiment, so that the flow resistance loss of the flue gas is small.

[0036] As Figure 3 and Figure 4As shown in the technical scheme of the embodiment, the flue gas flow guide assembly 30 further comprises a homogenizing plate 33, which is located between the outlet of the flue gas inlet pipe 32 and the outer wall of the shell assembly 10. The homogenizing plate 33 is arranged to make the flue gas uniformly distributed, and the flue gas encounters the homogenizing plate 33, so that a part of the flue dust falls, thereby changing the paths of the gas and the solid. As another embodiment, the outlet of the inner wall of the flue gas inlet pipe 32 is in the shape of a spiral downward arc, so that the flue dust entering the flue dust pretreatment space 100 is separated not only by gravity but also by centrifugal force, and the separation effect is better, the separation efficiency is higher, and the purity of the separated gas is higher.

[0037] As shown in the technical scheme of the embodiment, Figure 3 and Figure 4 As shown in the technical scheme of the embodiment, the distance from the homogenizing plate 33 to the outlet of the flue gas inlet pipe 32 is L, and the distance between the homogenizing plate 33 and the outer wall of the shell assembly 10 is D, D is 1.5 to 4.6 times of L. Such a structure makes the flue gas separation effect better. The impact of the flue gas on the homogenizing plate 33 when the kinetic energy is large makes the flue gas separation effect better, and in addition, the flue gas has enough distance to further separate after encountering the homogenizing plate 33. In the technical scheme of the embodiment, D is 3 times of L.

[0038] As shown in the technical scheme of the embodiment, Figure 3 In the technical scheme of the embodiment, the homogenizing plate 33 has a plurality of sieve holes, and the bottom edge of the homogenizing plate 33 has a predetermined distance from the mounting wall. In this way, the flue dust and the gas of the flue gas can pass through the gap between the bottom edge of the homogenizing plate 33 and the mounting wall, effectively avoiding the accumulation of flue dust. The homogenizing plate 33 mainly plays the roles of blocking large-particle dust, homogenizing airflow distribution, and controlling airflow speed.

[0039] As shown in the technical scheme of the embodiment, Figure 3 In the technical scheme of the embodiment, the ratio of the predetermined distance between the bottom edge of the homogenizing plate 33 and the mounting wall to the height of the flow passage is the same as the ratio of the length of the mounting wall corresponding to the homogenizing plate 33 to the overall mounting wall. Such a structure makes the flow of the gas more smooth, and it is not easy to form a dead angle where the gas cannot flow. The flow passage of the embodiment is one, and the flue gas flow guide assembly 30 is also one.

[0040] As another embodiment, the flow passage is multiple, and the multiple flow passages are uniformly distributed along the circumference of the shell assembly 10. The flue gas flow guide assembly 30 corresponds to the multiple flow passages one by one. The arrangement of the multiple flow passages makes the distribution effect of the gas entering the filtering section 12 better, so that the gas distribution of the purification assembly 20 is more uniform. The flow passage can be arranged in three, and the central angles of the adjacent flow passages are 120°.

[0041] In the technical scheme of the embodiment, the purification assembly 20 comprises a catalytic ceramic tube structure 21. Such structure has the functions of purification, filtration and catalytic reaction.

[0042] As shown in Figure 2 In the technical scheme of the embodiment, the purification assembly 20 further comprises a gas distribution flower plate structure 22, which is arranged on the side of the catalytic ceramic tube structure 21 away from the hopper section 11. The arrangement of the gas distribution flower plate structure 22 further ensures that the purified gas is distributed more evenly after entering the purification section.

[0043] According to another aspect of the present application, there is also provided a kiln device, which comprises a kiln and a flue gas dedusting mechanism connected to the smoke outlet of the kiln, and the flue gas dedusting mechanism is the dedusting mechanism described above.

[0044] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical scheme disclosed herein according to the above description.

[0045] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, but not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A flue gas dedusting mechanism, characterized in that: The dust removal mechanism comprises: a shell assembly (10) comprising, from bottom to top, a hopper section (11) having a slag outlet at the bottom, a filter section (12) having a flow-through opening with the hopper section (11), and a purification section (13) having a gas outlet; a purification assembly (20) arranged in the filter section (12); a flue gas guide assembly (30) comprising a guide shell (31) located outside the shell assembly (10) and forming a flue dust pretreatment space (100) with the shell assembly (10), the flow-through opening being located at the lowest part of the flue dust pretreatment space (100), and a flue gas inlet pipe (32) having an inlet located outside the flue dust pretreatment space (100) and an outlet located inside the flue dust pretreatment space (100), the inlet of the flue gas inlet pipe (32) being located at a predetermined distance from the outer wall of the filter section (12).

2. A flue gas dedusting mechanism according to claim 1, characterized in that, The guide shell (31) comprises a mounting wall, a top wall, and two connecting side walls, the two connecting side walls gradually increasing in width from bottom to top, the mounting wall being located on the side of the two connecting side walls away from the shell assembly (10), the flue gas inlet pipe (32) being mounted on the mounting wall, and the top wall being located at the top of the mounting wall and the two connecting side walls.

3. A flue gas dedusting mechanism according to claim 2, characterized in that, The flue gas guide assembly (30) further comprises a homogenizing plate (33) located between the outlet of the flue gas inlet pipe (32) and the outer wall of the shell assembly (10).

4. A flue gas dedusting mechanism according to claim 3, characterized in that, The distance from the homogenizing plate (33) to the outlet of the flue gas inlet pipe (32) is L, and the distance from the homogenizing plate (33) to the outer wall of the shell assembly (10) is D, D being 1.5 to 4.6 times L.

5. A flue gas dedusting mechanism according to claim 3, characterized in that, The homogenizing plate (33) has a plurality of screen holes, and the bottom edge of the homogenizing plate (33) is located at a predetermined distance from the mounting wall.

6. A flue gas dedusting mechanism according to claim 5, characterized in that, The ratio of the predetermined distance between the bottom edge of the homogenizing plate (33) and the mounting wall to the height of the flow-through opening is the same as the ratio of the length of the mounting wall corresponding to the homogenizing plate (33) to the overall length of the mounting wall.

7. The flue gas dedusting mechanism according to claim 1, characterized in that, The flow-through opening is a plurality of flow-through openings, and the plurality of flow-through openings are uniformly distributed along the circumference of the shell assembly (10), and the flue gas guide assembly (30) corresponds to the plurality of flow-through openings.

8. A flue gas dedusting mechanism according to any one of claims 1 to 6, characterized in that, The purification assembly (20) comprises a catalyst ceramic tube structure (21).

9. A flue gas dedusting mechanism according to claim 8, characterized in that, The purification assembly (20) further comprises a gas distribution plate structure (22) arranged on the side of the catalyst ceramic tube structure (21) away from the hopper section (11).

10. A kiln apparatus, characterised in that, The dust removal mechanism comprises: a kiln and a flue gas dust removal mechanism connected to the flue gas outlet of the kiln, the flue gas dust removal mechanism being any one of the dust removal mechanisms according to claims 1 to 9.

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