CN112569775A - Dry-type tail gas desulfurization system - Google Patents
Dry-type tail gas desulfurization system Download PDFInfo
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- CN112569775A CN112569775A CN202011595964.7A CN202011595964A CN112569775A CN 112569775 A CN112569775 A CN 112569775A CN 202011595964 A CN202011595964 A CN 202011595964A CN 112569775 A CN112569775 A CN 112569775A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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Abstract
The invention relates to a dry-type tail gas desulfurization system, which comprises a desulfurization reaction tower, a gas inlet, a gas outlet and a circulating inlet, wherein the circulating inlet is formed in the side wall of the desulfurization reaction tower; the front dust remover is provided with an air inlet and a discharge hole; the circulating hopper is provided with a feeding hole and a discharging hole; circulating an ash sliding pipe; the gas outlet of the desulfurization reaction tower is communicated with the gas inlet of the front dust remover, the discharge hole of the front dust remover is communicated with the feed inlet of the circulating hopper, one end of the circulating ash-sliding pipe is communicated with the circulating inlet of the desulfurization reaction tower, and the other end of the circulating ash-sliding pipe is communicated with the circulating hopper; the circulating ash chute is internally provided with a material scattering piece at a circulating inlet close to the desulfurization reaction tower, and is used for scattering materials entering the desulfurization reaction tower, the materials can impact on the material scattering piece and are scattered under the interception of the material scattering piece, and the scattered materials can be blown away upwards by airflow in the desulfurization reaction tower more easily after flowing into the desulfurization reaction tower, so that the dry-type tail gas desulfurization system can work stably and reliably.
Description
Technical Field
The invention relates to a dry-type tail gas desulfurization system.
Background
In industrial production, it is often involved in conveying powdery material into a reactor, for example, in a dry-process tail gas desulfurization system, desulfurization ash is conveyed into a reaction tower, the bottom of the reaction tower is connected with an air inlet pipe, the air inlet pipe blows sulfur-containing gas into the reaction tower from the bottom of the reaction tower, the sulfur-containing gas forms an upward air flow in the reaction tower, the air flow is fully mixed with the desulfurization ash entering the reaction tower for desulfurization, and the blowing desulfurization ash flows upwards out of the reaction tower.
In the actual working process, the desulfurized ash can be recycled, and the desulfurized ash discharged from the reaction tower is collected by the recycling collection box, then is conveyed by the screw conveyor and finally directly flows into the reaction tower through the ash sliding pipe. Swift current ash pipe all is the direct injection reaction tower among the prior art, because the desulfurization ash can absorb moisture at the desulfurization in-process and become damp and have certain stickness, the desulfurization ash that adds in is the minimum powdered of particle size, and the desulfurization in-process need be to continuous a large amount of desulfurization ashes of delivering to in the reaction tower, therefore, the desulfurization ash can get into the reaction tower with concentrated strand form, ascending air current is difficult to upwards blow the desulfurization ash that becomes the strand completely in the reaction tower, the phenomenon of the ash that falls in the bottom of the reaction tower can appear, pile up too much and will block up the air inlet, influence desulfurization system's steady operation.
Disclosure of Invention
The invention aims to provide a dry tail gas desulfurization system, which aims to solve the technical problem that the dry tail gas desulfurization system in the prior art can not stably operate because the air inlet is easily blocked by the ash falling from the bottom of a reaction tower.
The dry-type tail gas desulfurization system adopts the following technical scheme:
a dry-type tail gas desulfurization system comprises a desulfurization reaction tower, a gas inlet, a gas outlet and a circulating inlet, wherein the circulating inlet is formed in the side wall of the desulfurization reaction tower; the front dust remover is provided with an air inlet and a discharge hole; the circulating hopper is provided with a feeding hole and a discharging hole; circulating an ash sliding pipe; the gas outlet of the desulfurization reaction tower is communicated with the gas inlet of the front dust remover, the discharge hole of the front dust remover is communicated with the feed inlet of the circulating hopper, one end of the circulating ash-sliding pipe is communicated with the circulating inlet of the desulfurization reaction tower, and the other end of the circulating ash-sliding pipe is communicated with the circulating hopper; and a material dispersing part is arranged at a circulating inlet close to the desulfurization reaction tower in the circulating ash chute and is used for dispersing materials entering the desulfurization reaction tower.
The beneficial effects are that: the material is at the end of circulation swift current ash pipe, and the material can strike on the bulk cargo spare, is broken up under the interception of bulk cargo spare, and to scattering all around when speed slows down, avoids the material to become concentrated strand flow to the desulfurization reaction tower in, and the material of dispersion flows can upwards blow away by the air current in the desulfurization reaction tower more easily behind the desulfurization reaction tower in to the material flow, avoids the material to block up the air inlet at the bottom of the desulfurization reaction tower deposit, ensures that dry-type tail gas desulfurization system can reliable and stable work.
Further, the caliber of the circulating inlet is larger than the pipe diameter of the circulating ash chute.
The beneficial effects are that: so make the end of circulation swift current ash pipe be the flaring structure, the circulation swift current ash pipe of avoiding circulation entrance obtains the pipe wall and causes the interference to the scattering of material, ensures that the material can be with as far as possible degree of scattering swift current to the desulfurization reaction tower in, reduces the possibility that desulfurization reaction tower bottom air inlet is blockked up, improves dry-type tail gas desulfurization system job stabilization nature.
Further, along the flow direction of the materials, the bulk cargo pieces are provided with at least two layers, and the bulk cargo pieces of the adjacent two layers are arranged in a staggered mode.
The beneficial effects are that: set up the bulk cargo piece staggered arrangement of multilayer bulk cargo piece and adjacent layer for the material can be by interception dispersion many times on its flow path, realizes breaking up more abundant the material, reduces the possibility that desulfurization reaction tower bottom air inlet is blockked up, improves the stability of dry-type tail gas desulfurization system work.
Further, the bulk material part is provided with a herringbone bulk material surface.
The beneficial effects are that: each bulk cargo piece all has two inclined planes for the bulk cargo piece has greater bulk cargo ability.
Furthermore, the circulating ash sliding pipe is divided into an upper pipe section and a dispersing pipe section along the flowing direction of the materials, the dispersing pipe section is triangular, one side of the triangular dispersing pipe section is provided with a discharge port in butt joint with the circulating inlet, the upper pipe section is connected to one of the other two sides of the dispersing pipe section, and the dispersing part is arranged in the dispersing pipe section.
The beneficial effects are that: by the arrangement, the circulating ash sliding pipe is convenient to connect with the desulfurization reaction tower, and the circulating ash sliding pipe can be ensured to have a large discharge hole.
Further, along the flowing direction of the materials, the pipe wall of the circulating ash chute is provided with air ports, at least part of the air ports correspond to the bulk material pieces, and the air ports are used for being connected with corresponding air blowing equipment so as to blow air flow into the circulating ash chute and blow the materials by utilizing the air flow.
The beneficial effects are that: the air current that blows out through the gas port is in coordination with the bulk cargo piece, realizes the more abundant decentralized processing to the material, and meanwhile, after the bulk cargo piece disperses, the concentration degree of material reduces by a wide margin for the material is blown off by the air current that blows out through the gas port more easily, reduces the requirement to the velocity of flow of the gas that the gas port blew out, reduces the manufacturing degree of difficulty of dry-type tail gas desulfurization system.
Further, a portion of the ports are located in the wall of the circulating ash chute upstream of the dispersion member to blow the material away before it impinges on the dispersion member.
The beneficial effects are that: the gas port on the pipe wall of the circulating ash sliding pipe at the upstream of the bulk material piece, the bulk material piece and the gas port corresponding to the bulk material piece on the pipe wall of the circulating ash sliding pipe form a three-level bulk material structure, so that the materials can be more fully dispersed.
Further, at least part of the air ports are positioned on the bottom pipe wall of the circulating ash chute.
The beneficial effects are that: the bottom of swift current ash pipe sets up the gas port, can prevent through the air current that blows out through the gas port that the material from hardening in the bottom of swift current ash pipe, ensures that the material can be in circulating smooth and easy flowing towards the desulfurization reaction tower in the swift current ash ring, and then improves dry-type tail gas desulfurization system working property's stability.
Drawings
FIG. 1 is a schematic configuration diagram of embodiment 1 of a dry tail gas desulfurization system according to the present invention;
FIG. 2 is a schematic view showing a part of a desulfurization reaction tower and a part of a circulating ash tube in embodiment 1 of a dry type off-gas desulfurization system according to the present invention;
the names of the components corresponding to the corresponding reference numerals in the drawings are:
1. a desulfurization reaction tower; 2. a front dust remover; 3. a circulating hopper; 4. a lower screw conveyor; 5. circulating an ash sliding pipe; 6. a post-dust collector; 7. an inlet flue gas flue; 8. a bulk material component; 9. an upper pipe section; 10. a bulk material pipe section; 11. and (4) air blowing equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present in the embodiments of the present invention, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the recitation of "comprising an … …" may occur without the exclusion of additional like elements present in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Example 1 of the dry tail gas desulfurization system in the present invention:
as shown in fig. 1, the device comprises a desulfurization reaction tower 1, a front dust remover 2, a circulating hopper 3, a lower screw conveyor 4, a circulating ash chute 5 and a rear dust remover 6. Wherein, the bottom of desulfurization reaction tower 1 is provided with the air inlet, and the air inlet is connected with air inlet flue 7, lets in the sulfur-containing tail gas into desulfurization reaction tower 1 through air inlet flue 7, and the sulfur-containing tail gas forms from bottom to top high-speed air current in desulfurization reaction tower 1. The upper part of the front dust remover 2 is provided with an air inlet, the lower part of the front dust remover is provided with a discharge hole, an air outlet of the desulfurization reaction tower 1 is communicated with the air inlet of the front dust remover 2, the circulating hopper 3 is provided with a feed inlet and a discharge hole, the discharge hole of the front dust remover 2 is communicated with the feed inlet of the circulating hopper 3, and the discharge hole of the circulating hopper 3 is connected with the lower screw conveyor 4. The circulating ash-sliding pipe 5 is connected between the lower screw conveyor 4 and the desulfurization reaction tower 1, and the circulating ash-sliding pipe 5 is obliquely arranged, so that the material collected by the circulating hopper 3, namely the desulfurization ash, can flow into the desulfurization reaction tower 1 along the circulating ash-sliding pipe 5. The desulfurization reaction tower 1 is provided with a circulating inlet for materials to flow into.
In order to ensure that the material can flow into the desulfurization reaction tower 1 in a dispersed state, as shown in fig. 2, a dispersing member 8 for dispersing the material entering the desulfurization reaction tower 1 is provided in the circulating ash chute 5 near the circulating inlet of the desulfurization reaction tower 1.
In this embodiment, the circulating ash chute 5 includes two butt-jointed sections, wherein one section is an upper section 9, the upper section 9 is connected with the lower screw conveyor 4, the other section is a bulk material section 10, and the bulk material section 10 is connected between the desulfurization reaction tower 1 and the upper section 9. The bulk material 8 is arranged in a bulk material tube section 10.
In this embodiment, the dispersing pipe section 10 is triangular, the left side of the triangular dispersing pipe section 10 is provided with a discharge port butted with the circulation inlet, and the upper pipe section 9 is connected to the upper side of the dispersing pipe section 10. In other embodiments, the upper tube section may also be attached to the right side of the dispersion tube section.
In order to prevent the wall of the circulating ash chute 5 from restricting the dispersion of the material, the size of the circulation inlet is larger than the inner diameter of the circulating ash chute 5 in this embodiment. In other embodiments, to reduce the manufacturing difficulty of the dry desulfurization system, the size of the recycle inlet may be set to be consistent with the inner diameter of the recycle ash chute 5 on the premise that the tube wall of the recycle ash chute 5 does not restrict the dispersion of the material.
As shown in fig. 2, the bulk material 8 in this embodiment is an angle steel structure and has a chevron-shaped bulk material surface, and in other embodiments, the bulk material may also be a pipe fitting with a triangular cross section. Regarding the quantity of bulk cargo 8, be provided with four layers of bulk cargo 8 along the flow direction of material in this embodiment, wherein, first, the three-layer all sets up two bulk cargo 8 side by side, and second, four layers respectively set up a bulk cargo 8, and two adjacent intraformational bulk cargo 8 stagger arrangement for the material can realize a lot of bulk cargo in circulation swift current ash pipe 5.
Regarding the installation structure of the bulk material 8 in the circulating ash chute 5, in the embodiment, the two ends of the bulk material 8 are fixedly connected with the inner wall of the circulating ash chute 5 to fix the bulk material 8 in the circulating ash chute 5, and the bulk material 8 is horizontally arranged in the circulating ash chute 5. In other embodiments, the number of the bulk cargo pieces can be adaptively increased or decreased according to specific situations, and structurally, the bulk cargo pieces can also be inclined straight plates which are obliquely arranged in the circulating ash chute, and each bulk cargo piece only has one bulk cargo surface.
As a further optimization, as shown in fig. 2, the bottom tube wall of the bulk material tube section 10 is provided with air ports at intervals along the material flow direction, and air blowing devices 11 are arranged corresponding to the air ports, and the positions of the air ports correspond to the positions of the bulk materials 8 along the material flow direction, so that after the materials impact on the bulk materials 8 to be dispersed, the materials can be further blown away by blowing high-speed air flow to the dispersed materials, and meanwhile, the air ports are arranged on the tube walls of the portion 10 of the bulk material tube section, so that the materials can be prevented from hardening on the bottom tube wall of the bulk material tube section 10. In order to prevent the air passage between the tuyere and the air blowing device 11 from being filled with the material, the air passage between the tuyere and the air blowing device 11 may be set in a curved structure, such as an L-shape. In other embodiments, the tuyere may be disposed on the side tube wall of the bulk material tube section, and of course, the tuyere may be disposed on the side tube wall and the bottom tube wall of the bulk material tube section at the same time.
Furthermore, in this embodiment, the bottom tube wall at the end where the upper tube section 9 is connected to the bulk material tube section 10 is also provided with an air port, and a corresponding air blowing device 11 is correspondingly provided, so that the material can be primarily blown away before entering the bulk material tube section 10, and the material can be prevented from hardening at the end of the upper tube section 9. In other embodiments, the tuyere can be arranged on the side wall of the upper pipe section 9, or both the bottom pipe wall and the side pipe wall of the end of the upper pipe section 9 connected with the bulk material pipe section 10. The blowing device 11 connected with the tuyere of the upper pipe section 9 and the bulk material pipe section 10 can be opened all the time or periodically.
During specific work, the material flows to desulfurization reaction tower 1 along circulation swift current ash pipe 5, when the end of flow through upper portion pipe section 9, the high-speed air current that blows out from the wind gap carries out preliminary blowing off to the material, the material that preliminary blowing off gets into in the bulk cargo pipe section 10, the material strikes on bulk cargo spare 8 at the in-process that flows in bulk cargo pipe section 10, disperse to around when slowing down under the interception of bulk cargo spare 8, meanwhile, the air current that blows off through the gas gap on bulk cargo pipe section 10 further blows off the material, then the material of dispersion gets into desulfurization reaction tower 1 through circulation entry in, float on the top under the blowing of air current in desulfurization reaction tower 1, avoid the material to block up the air inlet in the bottom of desulfurization reaction tower 1, ensure that dry-type tail gas desulfurization system can long-time stable work.
The difference between the embodiment 2 of the dry-type tail gas desulfurization system of the present invention and the embodiment 1 is that the scattering surface of the scattering member in the embodiment 1 is a straight surface, whereas in the embodiment, the scattering member is an umbrella-shaped structure, and the curved surface of the scattering member of the umbrella-shaped structure constitutes the scattering surface. For such bulk material pieces, the bulk material pieces can be fixed in the circulating ash chute by arranging connecting ribs between the bulk material pieces and the pipe wall of the circulating ash chute.
In embodiment 3 of the dry-type exhaust gas desulfurization system of the present invention, a difference between this embodiment and embodiment 1 is that in embodiment 1, the dry-type exhaust gas desulfurization system includes a blowing device disposed corresponding to the air port, and in this embodiment, the dry-type exhaust gas desulfurization system does not include a blowing device, but additionally allocates a corresponding blowing device after the dry-type exhaust gas treatment system is installed in the installation location.
The difference between the embodiment 4 of the dry-type tail gas desulfurization system of the present invention and the embodiment 1 is that in the embodiment, the upper pipe section and the bulk material pipe section are of an integrated structure, and the circulating ash chute is structurally divided into the upper pipe section and the bulk material pipe section.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (8)
1. A dry tail gas desulfurization system comprising:
the desulfurization reaction tower (1) is provided with a gas inlet, a gas outlet and a circulating inlet arranged on the side wall;
the front dust remover (2) is provided with an air inlet and a discharge hole;
a circulating hopper (3) having a feed inlet and a discharge outlet;
a circulating ash sliding pipe (5);
an air outlet of the desulfurization reaction tower (1) is communicated with an air inlet of the front dust remover (2), a discharge outlet of the front dust remover (2) is communicated with a feed inlet of the circulating hopper (3), one end of the circulating ash slip pipe (5) is communicated with a circulating inlet of the desulfurization reaction tower (1), and the other end of the circulating ash slip pipe is communicated with the circulating hopper (3);
it is characterized in that the utility model is characterized in that,
and a material dispersing part (8) is arranged at a circulating inlet close to the desulfurization reaction tower (1) in the circulating ash chute (5) and is used for dispersing materials entering the desulfurization reaction tower (1).
2. The dry tail gas desulfurization system according to claim 1, wherein the diameter of the circulation inlet is larger than the diameter of the circulation ash chute (5).
3. Dry tail gas desulfurization system according to claim 1 or 2, characterized in that the dispersion member (8) is provided with at least two layers in the flow direction of the material, the dispersion members (8) of two adjacent layers being arranged offset.
4. Dry tail gas desulfurization system according to claim 1 or 2, characterized in that the dispersion member (8) has a chevron-shaped dispersion surface.
5. The dry tail gas desulfurization system according to claim 1 or 2, wherein the circulating ash chute (5) is divided into an upper pipe section (9) and a dispersion pipe section (10) in the material flow direction, the dispersion pipe section (10) is triangular, one side of the triangular dispersion pipe section (10) is provided with a discharge port butted against a circulation inlet, the upper pipe section (9) is connected to one of the other two sides of the dispersion pipe section (10), and the dispersion member (8) is disposed in the dispersion pipe section (10).
6. The dry tail gas desulfurization system according to claim 1 or 2, characterized in that the circulating ash chute (5) has gas ports on its wall along the material flow direction, at least some of the gas ports corresponding to the material scattering members (8), and the gas ports are used to connect with corresponding blowing devices (11) to blow gas flow into the circulating ash chute (5) to blow the material by the gas flow.
7. Dry tail gas desulfurization system according to claim 6, characterized in that some of the gas ports are located in the wall of the circulating ash tube (5) upstream of the dispersion member (8) to blow the material before it impinges on the dispersion member (8).
8. The dry tail gas desulfurization system according to claim 6, wherein at least a part of the gas ports are formed in the bottom wall of the circulating ash tube (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011595964.7A CN112569775A (en) | 2020-12-29 | 2020-12-29 | Dry-type tail gas desulfurization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011595964.7A CN112569775A (en) | 2020-12-29 | 2020-12-29 | Dry-type tail gas desulfurization system |
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| CN112569775A true CN112569775A (en) | 2021-03-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005313035A (en) * | 2004-04-27 | 2005-11-10 | Sumitomo Heavy Ind Ltd | Exhaust gas treatment apparatus |
| CN101559321A (en) * | 2009-05-15 | 2009-10-21 | 武汉凯迪电力环保有限公司 | Material circulating device of circulating fluid bed flue gas desulphurization system |
| CN102976101A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Desulfurized ash delivery device |
| KR101340389B1 (en) * | 2013-04-18 | 2014-01-10 | 한국에너지기술연구원 | Spouted bed type reactor for semi-dry flue gas desulfurization and multi- stage desulfurization method using thereof |
| CN208145760U (en) * | 2018-01-03 | 2018-11-27 | 陕西蔚蓝节能环境科技集团有限责任公司 | A kind of lime pneumatic conveying disperser |
-
2020
- 2020-12-29 CN CN202011595964.7A patent/CN112569775A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005313035A (en) * | 2004-04-27 | 2005-11-10 | Sumitomo Heavy Ind Ltd | Exhaust gas treatment apparatus |
| CN101559321A (en) * | 2009-05-15 | 2009-10-21 | 武汉凯迪电力环保有限公司 | Material circulating device of circulating fluid bed flue gas desulphurization system |
| CN102976101A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Desulfurized ash delivery device |
| KR101340389B1 (en) * | 2013-04-18 | 2014-01-10 | 한국에너지기술연구원 | Spouted bed type reactor for semi-dry flue gas desulfurization and multi- stage desulfurization method using thereof |
| CN208145760U (en) * | 2018-01-03 | 2018-11-27 | 陕西蔚蓝节能环境科技集团有限责任公司 | A kind of lime pneumatic conveying disperser |
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Application publication date: 20210330 |