CN110788001A - Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln - Google Patents

Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln Download PDF

Info

Publication number
CN110788001A
CN110788001A CN201911066912.8A CN201911066912A CN110788001A CN 110788001 A CN110788001 A CN 110788001A CN 201911066912 A CN201911066912 A CN 201911066912A CN 110788001 A CN110788001 A CN 110788001A
Authority
CN
China
Prior art keywords
dust concentration
dust
air
air inlet
lime kiln
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911066912.8A
Other languages
Chinese (zh)
Other versions
CN110788001B (en
Inventor
周浩宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongye Changtian International Engineering Co Ltd
Original Assignee
Zhongye Changtian International Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhongye Changtian International Engineering Co Ltd filed Critical Zhongye Changtian International Engineering Co Ltd
Priority to CN201911066912.8A priority Critical patent/CN110788001B/en
Publication of CN110788001A publication Critical patent/CN110788001A/en
Application granted granted Critical
Publication of CN110788001B publication Critical patent/CN110788001B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/02—Arrangement of air or material conditioning accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/04—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06—Feeding or discharging arrangements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/10—Preheating, burning calcining or cooling
    • C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00—Control of flow ratio
    • G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/135—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by sensing at least one property of the mixture
    • G05D11/138—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by sensing at least one property of the mixture by sensing the concentration of the mixture, e.g. measuring pH value
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The invention discloses a winnowing device for removing fine particle dust in a lime kiln, a control method and the lime kiln, wherein the winnowing device comprises: the top of the cylinder body is provided with an air outlet, and the upper part of the cylinder body is provided with a feed inlet; the rotary reflection plate type winnowing mechanism comprises a rotary reflection grate plate arranged in a cylinder, a plurality of air distribution holes are formed in the rotary reflection grate plate, one end of the rotary reflection grate plate is arranged on the side wall of the cylinder, the other end of the rotary reflection grate plate is a free end, a rotary motor is arranged on the outer wall of the cylinder, and the output end of the rotary motor is connected with the rotary reflection grate plate through a rotary coupling; and the air inlet device is arranged at the lower part of the barrel and is positioned below the rotary reflecting plate type winnowing mechanism, and the air inlet device is used for blowing air flow into the barrel. The winnowing device and the lime kiln effectively solve the problems of serious environmental pollution and serious waste of fine ore resources during discharging of the existing lime kiln.

Description

Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln
Technical Field
The invention relates to the technical field of lime production equipment, in particular to a winnowing device for removing fine particle dust in a lime kiln, a control method and the lime kiln.
Background
Lime is an important auxiliary raw material widely used in the metallurgical industry. In the processes of sintering of iron-making raw materials, iron-making reduction, pretreatment of molten iron and external refining, lime is used as an additive, has the functions of adjusting the alkalinity of furnace charge, slagging, desulfurization and the like, and plays an important role in smoothly carrying out the iron-making and steel-making processes.
The lime kiln is a core device in the lime production process, raw material limestone is heated to 1100 ℃ in the lime kiln, and the raw material limestone is calcined to generate product lime. The currently widely used lime kiln types are mainly vertical kilns (see figure 1). More lime fine particle dust is generated in the production process of the lime kiln. Because the existing lime kiln is not provided with a lime kiln fine particle dust removal and separation system, the finished ore discharged from a discharge port at the lower part of the lime kiln contains a large amount of lime powder ore, residue after pulverized coal burning and the like, and the dust can scatter and splash when being discharged from the discharge port along with the finished ore, thereby forming serious environmental dust pollution and deteriorating the operation environment beside a machine; in addition, fine particle dust can be scattered in the surrounding environment under the action of environmental wind in the process of feeding opening and belt conveying, and most of the dust is limestone powder ore which can be directly recycled, so that serious resource waste is caused.
Disclosure of Invention
The invention mainly aims to provide a winnowing device for removing fine particle dust in a lime kiln, a control method and the lime kiln, and aims to solve the problems of serious environmental pollution and serious waste of powder ore resources during discharging of the lime kiln in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an air separation device for removing fine particulate dust of a lime kiln, the air separation device comprising:
the top of the cylinder body is provided with an air outlet, and the upper part of the cylinder body is provided with a feed inlet;
the rotary reflection plate type winnowing mechanism comprises a rotary reflection grate plate arranged in a cylinder, a plurality of air distribution holes are formed in the rotary reflection grate plate, one end of the rotary reflection grate plate is arranged on the side wall of the cylinder, the other end of the rotary reflection grate plate is a free end, a rotary motor is arranged on the outer wall of the cylinder, and the output end of the rotary motor is connected with the rotary reflection grate plate through a rotary coupling;
and the air inlet device is arranged at the lower part of the barrel and is positioned below the rotary reflecting plate type winnowing mechanism, and the air inlet device is used for blowing air flow into the barrel.
Furthermore, a plurality of sets of rotating reflecting plate type winnowing mechanisms are arranged in the cylinder body along the height direction.
Furthermore, a plurality of sets of rotary reflecting plate type winnowing mechanisms are alternately arranged on two sides of the inner cavity of the cylinder, and the rotary reflecting grate plates are obliquely arranged downwards and can periodically and uniformly rotate back and forth by cantilevers within an included angle of 0-30 degrees with the horizontal plane.
Furthermore, the barrel comprises a vertical barrel, the rotary reflecting plate type winnowing mechanism is installed in the vertical barrel, the upper end of the vertical barrel is connected with a reducing barrel, the diameter of the upper part of the reducing barrel is smaller than that of the lower part of the reducing barrel, and the air outlet is formed in the upper part of the reducing barrel.
Further, the air inlet device includes:
the annular air duct is arranged around the outer side of the lower part of the cylinder;
the output end of the fan is communicated with the annular air duct through an air inlet main pipeline;
the air inlet branch pipe, the one end and the annular duct intercommunication of air inlet branch pipe, the inner chamber lower part intercommunication of the other end and the barrel of air inlet branch pipe, air inlet branch pipe is many, and many air inlet branch pipes set up along barrel circumference equipartition.
Furthermore, an air inlet main pipe valve is arranged on the air inlet main pipeline, and an air inlet branch pipe valve is arranged on the air inlet branch pipeline.
Further, the air separation device also comprises a control system, and the control system comprises:
the dust concentration detector is arranged at the air outlet and is used for detecting the concentration of dust in the gas discharged from the air outlet;
the controller, the dust concentration detector, the fan, the air inlet main pipe valve and the air inlet branch pipe valve are all connected with the controller.
According to another aspect of the invention, there is provided a control method of the air separation device for removing fine particle dust in the lime kiln, which comprises the following steps:
s100: acquiring a dust concentration signal in the gas discharged from the air outlet through a dust concentration detector, sending the dust concentration signal to a controller to be compared with a preset value, and judging whether the dust concentration in the discharged gas reaches the standard or not by the controller;
s200: if the dust concentration in the discharged gas does not reach the standard, the controller controls the output power of the fan to be increased, the dust concentration signal in the gas discharged from the air outlet is obtained again through the dust concentration detector after the gas is continuously operated for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned;
s300: if the dust concentration in the discharged gas does not reach the standard, the controller controls the output power of the fan to be increased, the opening degree of the air inlet main pipe valve is increased, the dust concentration signal in the gas discharged from the air outlet is obtained again through the dust concentration detector after the air inlet main pipe valve continuously operates for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned;
s400: if the dust concentration in the discharged gas does not reach the standard, the controller controls the output power of the fan to be increased, the opening degree of the main air inlet pipe valve is increased, the opening degree of the branch air inlet pipe valve is increased, the dust concentration signal in the gas discharged from the air outlet is obtained again through the dust concentration detector after the operation is continued for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned; and if the dust concentration still does not reach the standard, determining the dust concentration to be in a new normal state, and defining the dust concentration at the moment as a new preset value.
Further, whether the dust concentration in the discharged gas reaches the standard or not is judged by the controller, and the method specifically comprises the following steps:
the dust concentration value lambda in the gas discharged from the air outletReal timeAnd the historical average dust concentration value lambda of the air outletAverageCalculating according to the following formula to obtain the current real-time dust difference rate kReal time；
kReal time＝(λReal time-λAverage)/λAverage
The current real-time dust difference value kReal timeThe difference value k from the preset dust valueSetting upComparing;
if k isReal timeGreater than a predetermined dust difference kSetting upThe dust concentration in the discharged gas does not reach the standard;
if k isReal timeLess than or equal to the preset dust difference rate kSetting upThe dust concentration in the discharged gas reaches the standard;
wherein k isSetting upThe specific value of (a) is determined according to the average particle size of the limestone entering the lime kiln.
According to another aspect of the invention, a lime kiln is provided, which comprises a kiln body, a discharge port of the lime kiln is arranged at the lower part of the kiln body, the lime kiln is also provided with the air separation removal device, and the discharge port of the lime kiln is connected with a feed port in the air separation removal device through a material conveying chute.
By applying the technical scheme of the invention, the rotary reflecting plate type winnowing mechanism is arranged in the barrel, the air outlet is arranged at the top of the barrel, the air inlet device is arranged below the rotary reflecting plate type winnowing mechanism at the lower part of the barrel, air flow is blown into the barrel through the air inlet device, and the air flow rises through the rotary reflecting plate type winnowing mechanism and then flows out through the air outlet; the material to be winnowed is put into the cylinder from the feeding hole, falls onto the rotary reflecting grate plate in the cylinder, is driven by the rotary motor, the rotary coupling drives the rotary reflecting grate plate to periodically and uniformly rotate by the cantilever in a certain angle, and the material slides downwards on the rotary reflecting grate plate; meanwhile, high-speed airflow is blown into the lower part of the cylinder through the air inlet device, and the airflow passes through the air distribution holes on the rotary reflecting grate plate from bottom to top, so that the airflow passes through the material layer moving on the rotary reflecting grate plate, and dust mixed in the material is brought into the airflow and is discharged out of the cylinder through the air outlet. The dust collecting device is arranged at the air outlet, so that dust can be collected. The winnowing device effectively solves the problems of serious environmental pollution and serious waste of fine ore resources during discharging of the existing lime kiln.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a lime kiln of the prior art.
FIG. 2 is a schematic structural diagram of a lime kiln according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of an air separation device according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a rotating reflector plate type winnowing mechanism in the winnowing device according to the embodiment of the invention.
Fig. 5 is a schematic structural view of a first air distribution hole arrangement manner of the rotating reflection plate type air separation mechanism in the air separation device according to the embodiment of the present invention.
Fig. 6 is a schematic structural view of a second air distribution hole arrangement manner of the rotating reflection plate type air separation mechanism in the air separation device according to the embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a third arrangement of air distribution holes of a rotating reflector plate type air separation mechanism in the air separation device according to the embodiment of the present invention.
Fig. 8 is a schematic structural view of an air intake device in the air separation device according to the embodiment of the present invention.
Fig. 9 is a flowchart illustrating a method of controlling the air classification device according to the embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a barrel; 11. an air outlet; 12. a vertical cylinder; 13. a reducing cylinder; 20. rotating the reflecting plate type winnowing mechanism; 21. rotating the reflecting grate plate; 22. a rotating electric machine; 23. a rotating coupling; 30. an air intake device; 31. an annular air duct; 32. a fan; 33. an air inlet branch pipe; 34. a main air inlet pipeline; 35. the air inlet main pipe valve; 36. an air inlet branch pipe valve; 40. a dust concentration detector; 100. a kiln body; 110. a discharge hole of the lime kiln; 120. a material conveying chute; 211. and air distribution holes.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in the description and in the claims of the present application do not denote any order, quantity, or importance, but rather the intention is to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Example 1:
referring to fig. 3 to 8, an air separation device for removing fine particle dust of a lime kiln according to an embodiment of the present invention mainly includes a cylinder 10, a rotating baffle type air separation mechanism 20, and an air intake device 30. Wherein, the top of the cylinder 10 is provided with an air outlet 11, and the upper part of the cylinder 10 is provided with a feed inlet; the rotating reflection plate type winnowing mechanism 20 comprises a rotating reflection grate plate 21 arranged in the cylinder 10, a plurality of air distribution holes 211 are formed in the rotating reflection grate plate 21, one end of the rotating reflection grate plate 21 is installed on the side wall of the cylinder 10, the other end of the rotating reflection grate plate 21 is a free end, a rotating motor 22 is installed on the outer wall of the cylinder 10, and the output end of the rotating motor 22 is connected with the rotating reflection grate plate 21 through a rotating coupling 23; the air intake device 30 is installed at the lower part of the cylinder 10 and located below the rotating reflection plate type winnowing mechanism 20, and the air intake device 30 is used for blowing air flow into the cylinder 10.
In the air separation device for removing fine particle dust of the lime kiln, the rotary reflecting plate type air separation mechanism 20 is arranged in the cylinder 10, the air outlet 11 is arranged at the top of the cylinder 10, the air inlet device 30 is arranged below the rotary reflecting plate type air separation mechanism 20 at the lower part of the cylinder 10, airflow is blown into the cylinder 10 through the air inlet device 30, and the airflow rises through the rotary reflecting plate type air separation mechanism 20 and then flows out through the air outlet 11; the material to be winnowed is thrown into the cylinder 10 from the feeding hole, the material falls onto the rotary reflecting grate plate 21 in the cylinder 10, the rotary coupling 23 drives the rotary reflecting grate plate 21 to periodically and uniformly rotate back and forth by cantilevers within a certain angle under the drive of the rotary motor 22, and the material slides downwards on the rotary reflecting grate plate 21; meanwhile, high-speed airflow is blown into the lower part of the cylinder 10 through the air inlet device 30, and the airflow passes through the air distribution holes 211 on the rotary reflecting grate plate 21 from bottom to top, so that the airflow passes through the material layer moving on the rotary reflecting grate plate 21, and dust mixed in the material is brought into the airflow and is discharged out of the cylinder 10 through the air outlet 11. Set up dust collection device in air outlet 11 department and can collect the dust. The winnowing device effectively solves the problems of serious environmental pollution and serious waste of fine ore resources during discharging of the existing lime kiln.
Further, referring to fig. 2, in the present embodiment, a plurality of sets of rotating reflection plate type winnowing mechanisms 20 are installed in the cylinder 10 along the height direction; the multiple sets of rotating reflection plate type winnowing mechanisms 20 are alternately arranged at two sides of the inner cavity of the cylinder body 10, the rotating reflection grate plates 21 are obliquely arranged downwards, and the rotating directions of the adjacent rotating reflection plate type winnowing mechanisms 20 are opposite. So set up, when the rotatory reflection castor board 21 of first layer was made clockwise, the rotatory reflection castor board 21 of second layer was made anticlockwise rotation, and the rotatory reflection castor board 21 of third layer is made clockwise rotation, just so can play the effect of vibration screening to the material, has further improved the selection by winnowing effect. The rotary reflection grate plate 21 can make periodic uniform cantilever back and forth rotation within 0-30 degrees of an included angle with the horizontal plane.
Referring to fig. 5, 6 and 7, in the present embodiment, the arrangement of the air distribution holes 211 on the rotating reflection grate 21 may be in various forms, such as a horizontal array, an inclined array or a ring arrangement.
Referring to fig. 2, in the present embodiment, the cylinder 10 includes a vertical cylinder 12, the rotating reflection plate type air separation mechanism 20 is installed in the vertical cylinder 12, a reducing cylinder 13 is connected to an upper end of the vertical cylinder 12, an upper diameter of the reducing cylinder 13 is smaller than a lower diameter thereof, and the air outlet 11 is disposed at an upper portion of the reducing cylinder 13. So set up, be favorable to discharging fine particle dust from air outlet 11 better.
Specifically, referring to fig. 3 and 8, in the present embodiment, the air intake device 30 includes an annular air duct 31, a fan 32, an air intake branch duct 33, and an air intake main duct 34. Wherein, the annular air duct 31 is arranged around the lower outer side of the cylinder 10; the output end of the fan 32 is communicated with the annular air duct 31 through an air inlet main pipe 34; one end of the air inlet branch pipe 33 is communicated with the annular air duct 31, the other end of the air inlet branch pipe 33 is communicated with the lower part of the inner cavity of the cylinder 10, the air inlet branch pipes 33 are multiple, and the air inlet branch pipes 33 are uniformly distributed along the circumferential direction of the cylinder 10. So set up, can be from the lower part of barrel 10 all around to the interior selection by winnowing air current of drum 10 evenly, make the material selection by winnowing desorption effect of each position in the barrel 10 unanimous.
Further, referring to fig. 3 and 6, in the present embodiment, a main intake pipe valve 35 is installed on the main intake pipe 34, and a branch intake pipe valve 36 is installed on each branch intake pipe 33. With such an arrangement, the wind speed and the wind volume of the air flow blown into the barrel 10 can be conveniently controlled and adjusted by adjusting the opening degrees of the main air inlet pipe valve 35 and the branch air inlet pipe valve 36. The corresponding air separation process parameters can be conveniently adjusted according to the properties of the materials.
In order to realize the automatic control of the air separation removal process, the air separation device may further include a control system, which includes a dust concentration detector 40 and a controller (not shown in the figure), the dust concentration detector 40 is installed at the air outlet 11 for detecting the concentration of dust in the gas discharged from the air outlet 11, and the dust concentration detector 40 preferably employs a shadow dust concentration detector; the dust concentration detector 40, the fan 32, the air inlet main pipe valve 35 and the air inlet branch pipe valve 36 are all connected with the controller. Through setting up foretell control system, can improve the degree of automation of device, reduce artifical intensity of labour, also be favorable to improving work efficiency and wind selection effect simultaneously.
Referring to fig. 9, the control method of the air classification device adopting the control system is as follows:
s100: acquiring a dust concentration signal in the gas discharged from the air outlet 11 through a dust concentration detector 40, sending the dust concentration signal to a controller to be compared with a preset value, and judging whether the dust concentration in the discharged gas reaches the standard or not by the controller;
s200: if the dust concentration in the discharged gas does not reach the standard, the controller controls the output power of the fan 32 to be increased, the dust concentration detector 40 is used for obtaining a dust concentration signal in the gas discharged from the air outlet 11 after the gas is continuously operated for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned;
s300: if the dust concentration in the discharged gas does not reach the standard, the controller controls to increase the output power of the fan 32 and increase the opening degree of the air inlet main pipe valve 35, the dust concentration signal in the gas discharged from the air outlet 11 is obtained again through the dust concentration detector 40 after the operation is continued for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned;
s400: if the dust concentration in the discharged gas does not reach the standard, the controller controls the output power of the fan 32 to be increased, the opening degree of the main air inlet pipe valve 35 is increased, the opening degree of the branch air inlet pipe valve 36 is increased, after the continuous operation is carried out for a period of time, the dust concentration detector 40 is used for obtaining a dust concentration signal in the gas discharged from the air outlet 11 again, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned; and if the dust concentration still does not reach the standard, determining the dust concentration to be in a new normal state, and defining the dust concentration at the moment as a new preset value.
Specifically, the determining whether the dust concentration in the discharged gas is up to standard by the controller includes: the dust concentration value lambda in the gas discharged from the air outlet 11Real timeAnd the historical average dust concentration value lambda of the air outlet 11AverageCalculating according to the following formula to obtain the current real-time dust difference rate kReal time；
kReal time＝(λReal time-λAverage)/λAverage
The current real-time dust difference value kReal timeThe difference value k from the preset dust valueSetting upComparing;
if k isReal timeGreater than a predetermined dust difference kSetting upThe dust concentration in the discharged gas does not reach the standard;
if k isReal timeLess than or equal to the preset dust difference rate kSetting upThe dust concentration in the discharged gas reaches the standard;
wherein k isSetting upThe specific value of (a) is determined according to the average particle size of the limestone entering the lime kiln.
If the dust concentration still does not reach the standard after the step S400, defaulting that the dust concentration reaches a new normal state of a working condition at the moment, and re-determining the historical average dust concentration value lambdaAverage。
In the above control method, kSetting upThe relationship with the average particle size of the limestone entering the lime kiln is shown in the following table.
Figure BDA0002259664160000071
The winnowing removal device for fine particle dust in the lime kiln of the embodiment utilizes the functions of taking away and suspending fine particles by fluid in fluid mechanics, and controls the air speed of the air flow entering the cylinder 10 from the lower part in the range of taking away the limestone material particles with larger particle size and the limestone material particles with smaller particle size. The range of flow rate parameters for different functions of the fluid for different particulate limestone materials is shown in the following table:
at rest Suspended in water Carry away
>8mm limestone material <7m/s 7-10m/s >10m/s
<8mm limestone material <5m/s 5-8m/s >8m/s
As can be seen from the above table, when the winnowing removal device of the present embodiment is used for winnowing limestone particles with a particle size of less than 8mm, the wind speed should be controlled between 8-10 m/s. However, this is only the basic condition, and when different equipment is used for winnowing, the different equipment structures cause different particle motion states, and the requirements on wind speed are different. The wind speed can be generally corrected by a factor k, and the k value is different for different device structures. The k value of the winnowing removal device of the embodiment is between 0.7 and 0.8.
Example 2:
referring to fig. 2 to 8, a lime kiln according to an embodiment of the present invention includes a kiln body 100, a discharge port 110 of the lime kiln is provided at a lower portion of the kiln body 100, the lime kiln is further provided with an air separation removal device according to an embodiment 1 of the present invention, and the discharge port 110 of the lime kiln is connected with a feed port of the air separation removal device through a material conveying chute 120. The structure of the winnowing removal device is the same as that of the embodiment 1, and the details are not repeated.
Generally, by adopting the air separation device and the lime kiln with the air separation device, a large amount of dust such as lime powder ore and residues after coal powder burning contained in the finished lime product ore can be effectively taken away by high-speed air; during discharging, fine particle dust cannot scatter and splash at the discharge port 110 of the lime kiln, so that the operation environment beside the machine is effectively improved; through installing dust collection device in air outlet 11 department, can collect the dust material that the selection by winnowing was come out, can realize the recycle of resource, to saving process cost, improving process economic benefits and have obvious effect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a wind selector of desorption lime kiln fine particle dust which characterized in that, wind selector includes:
the air purifier comprises a barrel (10), wherein an air outlet (11) is formed in the top of the barrel (10), and a feeding hole is formed in the upper part of the barrel (10);
the rotary reflection plate type winnowing mechanism (20) comprises a rotary reflection grate plate (21) arranged in the barrel (10), a plurality of air distribution holes (211) are formed in the rotary reflection grate plate (21), one end of the rotary reflection grate plate (21) is installed on the side wall of the barrel (10), the other end of the rotary reflection grate plate (21) is a free end, a rotary motor (22) is installed on the outer wall of the barrel (10), and the output end of the rotary motor (22) is connected with the rotary reflection grate plate (21) through a rotary coupling (23);
the air inlet device (30) is arranged at the lower part of the cylinder body (10) and is positioned below the rotary reflecting plate type air separation mechanism (20), and the air inlet device (30) is used for blowing air flow into the cylinder body (10).
2. The air separation device for removing fine particle dust of lime kilns as claimed in claim 1, characterized in that a plurality of sets of said rotating baffle plate type air separation mechanisms (20) are installed in the height direction in said cylinder (10).
3. The air separation device for removing fine particle dust of lime kiln as claimed in claim 2, wherein a plurality of sets of said rotary reflecting plate type air separation mechanisms (20) are alternately installed at both sides of the inner cavity of said cylinder (10), said rotary reflecting grate plate (21) is inclined downward and can make periodic uniform cantilever back and forth rotation within 0-30 ° of the included angle with the horizontal plane.
4. The air separation device for removing fine particle dust of lime kiln as claimed in claim 1, wherein said barrel (10) comprises a vertical cylinder (12), said rotating baffle type air separation mechanism (20) is installed in said vertical cylinder (12), a reducing cylinder (13) is connected to the upper end of said vertical cylinder (12), the diameter of the upper part of said reducing cylinder (13) is smaller than the diameter of the lower part thereof, and said air outlet (11) is provided at the upper part of said reducing cylinder (13).
5. The air separation device for removing fine particle dust of lime kilns as claimed in any one of claims 1-4, characterized in that said air intake device (30) comprises:
the annular air duct (31) is arranged on the outer side of the lower part of the cylinder body (10) in a surrounding mode;
the output end of the fan (32) is communicated with the annular air duct (31) through a main air inlet pipe (34);
air inlet lateral duct (33), the one end of air inlet lateral duct (33) with annular duct (31) intercommunication, the other end of air inlet lateral duct (33) with the inner chamber lower part intercommunication of barrel (10), air inlet lateral duct (33) are many, many air inlet lateral duct (33) are followed barrel (10) circumference equipartition sets up.
6. The air separation device for removing fine particle dust of lime kilns as claimed in claim 5, wherein a main air inlet pipe valve (35) is installed on the main air inlet pipe (34), and a branch air inlet pipe valve (36) is installed on the branch air inlet pipe (33).
7. The air separation unit for removing fine particulate dust from a lime kiln as set forth in claim 6, further comprising a control system, said control system comprising:
a dust concentration detector (40), the dust concentration detector (40) being installed at the air outlet (11) and being used for detecting the concentration of dust in the gas discharged from the air outlet (11);
the controller, dust concentration detector (40) fan (32) the air inlet is responsible for valve (35) and air inlet branch pipe valve (36) all with the controller is connected.
8. The method of controlling an air classifier for removing fine particulate dust from a lime kiln as set forth in claim 7, comprising:
s100: acquiring a dust concentration signal in the gas discharged from the air outlet (11) through the dust concentration detector (40), sending the dust concentration signal to the controller to be compared with a preset value, and judging whether the dust concentration in the discharged gas reaches the standard or not through the controller;
s200: if the dust concentration in the discharged gas does not reach the standard, the controller controls to increase the output power of the fan (32), the dust concentration detector (40) is used for obtaining a dust concentration signal in the gas discharged from the air outlet (11) again after the gas is continuously operated for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned;
s300: if the dust concentration in the discharged gas does not reach the standard, the controller controls to increase the output power of the fan (32) and increase the opening degree of the air inlet main pipe valve (35), the dust concentration detector (40) is used for obtaining a dust concentration signal in the gas discharged from the air outlet (11) after the air inlet main pipe valve continuously operates for a period of time, the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned;
s400: if the dust concentration in the discharged gas does not reach the standard, the controller controls the output power of the fan (32) to be increased, the opening degree of the air inlet main pipe valve (35) is increased, the opening degree of the air inlet branch pipe valve (36) is increased, after the air inlet branch pipe valve continuously operates for a period of time, a dust concentration signal in the gas discharged from the air outlet (11) is obtained through the dust concentration detector (40), the controller judges whether the dust concentration in the discharged gas reaches the standard or not, and if the dust concentration reaches the standard, the step S100 is returned; and if the dust concentration still does not reach the standard, determining the dust concentration to be in a new normal state, and defining the dust concentration at the moment as a new preset value.
9. The method as claimed in claim 8, wherein the determining whether the concentration of dust in the discharged gas reaches the standard by the controller comprises:
the dust concentration value lambda in the gas discharged from the air outlet (11)Real timeWith the historical average dust concentration value lambda of the air outlet (11)AverageCalculating according to the following formula to obtain the current real-time dust difference rate kReal time；
kReal time＝(λReal time-λAverage)/λAverage
The current real-time dust difference value kReal timeThe difference value k from the preset dust valueSetting upComparing;
if k isReal timeGreater than a predetermined dust difference kSetting upThe dust concentration in the discharged gas does not reach the standard;
if k isReal timeLess than or equal to the preset dust difference rate kSetting upThe dust concentration in the discharged gas reaches the standard;
wherein k isSetting upThe specific value of (a) is determined according to the average particle size of the limestone entering the lime kiln.
10. A lime kiln comprising a kiln body (100), the lower part of the kiln body (100) being provided with a lime kiln outlet (110), characterized in that the lime kiln is further provided with an air separation removal device according to any one of claims 1-7, the lime kiln outlet (110) being connected to the inlet in the air separation removal device by means of a material transfer chute (120).
CN201911066912.8A 2019-11-04 2019-11-04 Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln Active CN110788001B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911066912.8A CN110788001B (en) 2019-11-04 2019-11-04 Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911066912.8A CN110788001B (en) 2019-11-04 2019-11-04 Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln

Publications (2)

Publication Number Publication Date
CN110788001A true CN110788001A (en) 2020-02-14
CN110788001B CN110788001B (en) 2022-08-16

Family

ID=69442707

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911066912.8A Active CN110788001B (en) 2019-11-04 2019-11-04 Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln

Country Status (1)

Country Link
CN (1) CN110788001B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112845011A (en) * 2020-12-22 2021-05-28 天能电池(芜湖)有限公司 Wind-force screening lead powder device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005103479A (en) * 2003-10-01 2005-04-21 Hitachi Constr Mach Co Ltd Winnowing apparatus
CN201263392Y (en) * 2008-09-11 2009-07-01 上海烟草（集团）公司 Air separation dedusting cleaner for cabo
CN103522451A (en) * 2013-09-23 2014-01-22 宁波斯曼尔电器有限公司 Dust separation and collection device
CN103934199A (en) * 2013-01-21 2014-07-23 浙江双金机械集团股份有限公司 Environment-friendly dry type dust-free manufactured sand production device
CN203991599U (en) * 2014-06-26 2014-12-10 北京北宇机械设备有限公司 There is the vibratory sieve of automatic control air quantity function and apply its dedusting system for coal mines
CN107185830A (en) * 2017-07-12 2017-09-22 六盘水师范学院 It is a kind of to fluidize bed dry coal dressing machine from medium gas-particle two-phase
CN206810688U (en) * 2017-06-12 2017-12-29 浙江树人学院 A kind of tealeaves precise machining device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005103479A (en) * 2003-10-01 2005-04-21 Hitachi Constr Mach Co Ltd Winnowing apparatus
CN201263392Y (en) * 2008-09-11 2009-07-01 上海烟草（集团）公司 Air separation dedusting cleaner for cabo
CN103934199A (en) * 2013-01-21 2014-07-23 浙江双金机械集团股份有限公司 Environment-friendly dry type dust-free manufactured sand production device
CN103522451A (en) * 2013-09-23 2014-01-22 宁波斯曼尔电器有限公司 Dust separation and collection device
CN203991599U (en) * 2014-06-26 2014-12-10 北京北宇机械设备有限公司 There is the vibratory sieve of automatic control air quantity function and apply its dedusting system for coal mines
CN206810688U (en) * 2017-06-12 2017-12-29 浙江树人学院 A kind of tealeaves precise machining device
CN107185830A (en) * 2017-07-12 2017-09-22 六盘水师范学院 It is a kind of to fluidize bed dry coal dressing machine from medium gas-particle two-phase

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112845011A (en) * 2020-12-22 2021-05-28 天能电池(芜湖)有限公司 Wind-force screening lead powder device

Also Published As

Publication number Publication date
CN110788001B (en) 2022-08-16

Similar Documents

Publication Publication Date Title
CN110788003B (en) Control method of air separation device for removing fine particle dust of lime kiln
CN110788000A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln
CN201308903Y (en) Comprehensive sorting machine for civil living refuse
CN101722172A (en) Domestic garbage integrated separating machine
CN104399607A (en) Cyclone separating device and cyclone separation system based on cyclone separating device
CN110788002A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln with winnowing removal device
CN109970375A (en) A kind of building gypsum plaster production line
CN110860342A (en) External circulation roller type vertical mill
CN110788001B (en) Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln
CN103194561B (en) Device for directly adding sintering returned dust into ladle
CN110787999A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln
CN211913990U (en) External circulation roller type vertical mill
CN101693217A (en) System and method for grinding bauxite by dry method
CN101762147B (en) Clay mineral drier
CN110773427A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln
CN110526601A (en) The mixing formula limekiln of high yield and saving energy
CN104748508B (en) Coal slurry drying system
CN210773373U (en) Horizontal cement clinker grate type particle grading cooler
CN102701617B (en) Calcination production line and calcination method for industrial by-product gypsum
CN104743516A (en) Rotary kiln production method and equipment for bleaching powder product
CN204974227U (en) Skirt pendulum -type dry powder material grader
CN115353299B (en) Lime kiln ash discharging device
CN207325273U (en) A kind of silicon-carbide particles screening system
CN206891148U (en) A kind of bicyclic room alternately heating filters dirt intellectuality calciner plant certainly
CN217411512U (en) Dry grinding and dry separation system for iron-containing slag powder of steel slag

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant