CN110788000A - Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln - Google Patents

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

Info

Publication number
CN110788000A
CN110788000A CN201911066901.XA CN201911066901A CN110788000A CN 110788000 A CN110788000 A CN 110788000A CN 201911066901 A CN201911066901 A CN 201911066901A CN 110788000 A CN110788000 A CN 110788000A
Authority
CN
China
Prior art keywords
air
dust concentration
dust
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.)
Pending
Application number
CN201911066901.XA
Other languages
Chinese (zh)
Inventor
周浩宇
周乾刚
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 CN201911066901.XA priority Critical patent/CN110788000A/en
Publication of CN110788000A publication Critical patent/CN110788000A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/02Arrangement of air or material conditioning accessories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/04Control arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING 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
    • B07B11/00Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06Feeding or discharging arrangements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00Lime, magnesia or dolomite
    • C04B2/10Preheating, burning calcining or cooling
    • C04B2/12Preheating, burning calcining or cooling in shaft or vertical furnaces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00Control of flow ratio
    • G05D11/02Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/135Controlling 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
    • G05D11/138Controlling 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

Abstract

The invention discloses a winnowing removal device for fine particle dust in a lime kiln, a control method and the lime kiln, wherein the winnowing removal 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 air distribution grate plate is horizontally arranged in the cylinder body and is provided with a plurality of air distribution holes; the air inlet device is arranged at the lower part of the cylinder and is positioned below the air distribution grate plate, and the air inlet device is used for blowing air flow into the cylinder; the dust concentration detector is arranged at the air outlet and used for detecting the concentration of dust in the gas discharged from the air outlet; the controller, the dust concentration detector and the air inlet device are all connected with the controller, and the controller is used for controlling the flow of the air flow blown into the cylinder according to the dust concentration of the gas discharged from the air outlet. The winnowing removal device and the lime kiln solve the problems of serious environmental pollution and serious waste of fine ore resources during discharging of the existing lime kiln.

Description

Winnowing removal device for 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 removal device for 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 removal device for 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 removing device of fine particle dust of a lime kiln, 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 air distribution grate plate is horizontally arranged in the cylinder body and is provided with a plurality of air distribution holes;
the air inlet device is arranged at the lower part of the cylinder and is positioned below the air distribution grate plate, and the air inlet device is used for blowing air flow into the cylinder;
the dust concentration detector is arranged at the air outlet and used for detecting the concentration of dust in the gas discharged from the air outlet;
the controller, the dust concentration detector and the air inlet device are all connected with the controller, and the controller is used for controlling the flow of the air flow blown into the cylinder according to the dust concentration of the gas discharged from the air outlet.
Furthermore, a plurality of air distribution holes on the air distribution grate plate are uniformly distributed in an annular array or a rectangular array.
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 pipe, an air inlet branch pipe valve is arranged on the air inlet branch pipe, and the air inlet main pipe valve and the air inlet branch pipe valve are both connected with the controller.
Furthermore, the cylinder body comprises a vertical cylinder, the air distribution grate plate is installed in the vertical cylinder, the upper end of the vertical cylinder is connected with a reducing cylinder, the diameter of the upper part of the reducing cylinder is smaller than that of the lower part of the reducing cylinder, and the air outlet is formed in the upper part of the reducing cylinder.
Furthermore, a bearing ring plate is arranged outside the barrel, the lower part of the bearing ring plate is in suspension flexible connection with the civil engineering bearing platform through a suspension device, a weighing device is installed on the suspension device, the barrel is also connected with a lump removing device, the weighing device and the lump removing device are both connected with a controller, and a feeding port of the barrel is in flexible connection with a discharging port of the lime kiln.
According to another aspect of the invention, there is provided a control method for the air separation removal device of 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 timeAverage)/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.
Further, the control method further comprises:
s500: in the operation process of the winnowing removal device, the weighing device is used for acquiring the overall weight of the winnowing removal device, the overall weight information of the winnowing removal device is sent to the controller, and when the overall weight of the winnowing removal device exceeds a set value, the controller is controlled to start the nodule cleaning device to clean calcified nodules in the winnowing removal device.
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 air distribution grate plate is arranged in the cylinder, the air inlet device is arranged at the lower part of the cylinder, the air outlet is arranged at the top of the cylinder, the dust concentration detector is arranged at the air outlet, and the dust concentration detector and the air inlet device are connected with the controller; air flow is blown into the cylinder through the air inlet device, rises through the air distribution grate plate and is discharged from the air outlet; treat that the material of selection by winnowing processing gets into in the barrel from the feed inlet, drop on the cloth wind castor board, the air current is from up passing the cloth wind hole on the cloth wind castor board down, thereby pass the accumulational material layer on the cloth wind castor board, roll up the take the altitude and produce "boiling" state with the material, under this state, the great material of granularity can keep the unordered motion of high-speed boiling in the certain altitude range in the barrel, and the less dust material of granularity then can be carried by high-speed wind and move up, thereby blow off through the air outlet and accomplish the selection by winnowing process, can collect the dust at air outlet department installation dust collection device. The winnowing removal 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 in 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 removal device according to an embodiment of the invention.
Fig. 4 is a schematic structural view of a wind distribution grate plate in the air separation removal device according to the embodiment of the invention.
Fig. 5 is a schematic structural view of another air distribution grate plate in the air separation removal device of the embodiment of the invention.
Fig. 6 is a schematic structural view of an air intake device in the air separation removal device in the embodiment of the invention.
Fig. 7 is a schematic structural view of an air separation removal device provided with a bearing ring plate, a suspension device and a weighing device in the embodiment of the invention.
Fig. 8 is a flow chart of a control method of the air separation removal device according to the embodiment of the invention.
Wherein the figures include the following reference numerals:
10. a barrel; 11. an air outlet; 12. a vertical cylinder; 13. a reducing cylinder; 14. a force bearing ring plate; 15. a suspension device; 16. a weighing device; 20. a wind distribution grate plate; 21. air distribution holes; 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; 200. civil engineering bearing platform.
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 7, the air separation removal device for fine particle dust in a lime kiln of the embodiment of the invention mainly comprises a cylinder 10, an air distribution grate plate 20, an air inlet device 30, a dust concentration detector 40 and a controller. 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 air distribution grate plate 20 is horizontally arranged in the cylinder body 10, and a plurality of air distribution holes 21 are formed in the air distribution grate plate 20; the air intake device 30 is installed at the lower part of the cylinder 10 and is positioned below the air distribution grate plate 20, and the air intake device 30 is used for blowing air flow into the cylinder 10; a 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 adopts a light shadow type dust concentration detector; the dust concentration detector 40 and the air intake device 30 are both connected to the controller, and the controller is used for controlling the flow rate of the air flow blown into the cylinder 10 according to the concentration of the gas dust discharged from the air outlet 11.
The air separation removal device for fine particle dust of the lime kiln is characterized in that an air distribution grate plate 20 is arranged in a cylinder 10, an air inlet device 30 is arranged at the lower part of the cylinder 10, an air outlet 11 is arranged at the top of the cylinder 10, a dust concentration detector 40 is arranged at the air outlet 11, and the dust concentration detector 40 and the air inlet device 30 are connected with a controller; air flow is blown into the cylinder body 10 through the air inlet device 30, rises through the air distribution grate plate 20 and is discharged from the air outlet 11; the material that treats the selection by winnowing process gets into in the barrel 10 from the feed inlet, drop on cloth wind castor board 20, the air current passes the cloth wind hole 21 on cloth wind castor board 20 from bottom to top to pass the material layer of piling up on cloth wind castor board 20, roll up the material by a take the altitude and produce "boiling" state, under this state, the great material of granularity can keep the unordered motion of high-speed boiling in the certain altitude range in barrel 10, and the less dust material of granularity then can be carried upward movement by high-speed wind, thereby blow out through air outlet 11 and accomplish the selection by winnowing process, can install dust collection device and collect the dust in air outlet 11 department. The dust concentration detector 40, the controller and the air inlet device 30 can improve the automation degree of the device, reduce the labor intensity of workers and simultaneously facilitate the improvement of the working efficiency and the air separation effect. The winnowing removal device effectively solves the problems of serious environmental pollution and serious waste of fine ore resources during discharging of the existing lime kiln.
Referring to fig. 4 and 5, in the present embodiment, the plurality of air distribution holes 21 on the air distribution grate plate 20 are uniformly distributed in an annular array or in a rectangular array.
Specifically, referring to fig. 3 and 6, 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 multiple 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.
Referring to fig. 6, in the present embodiment, an inlet main pipe valve 35 is installed on the inlet main pipe 34, an inlet branch pipe valve 36 is installed on the inlet branch pipe 33, and both the inlet main pipe valve 35 and the inlet branch pipe valve 36 are connected to the controller. The controller controls the opening degree of the main air inlet pipe valve 35 and the branch air inlet pipe valve 36, so that the blast volume of the air inlet device 30 can be controlled and adjusted.
Referring to fig. 3, in the present embodiment, the cylinder 10 includes a vertical cylinder 12, the air distribution grate plate 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. By providing a reducing cylinder 13 between the vertical cylinder 12 and the air outlet 11, it is advantageous to better discharge fine particle dust out of the cylinder 10.
When the humidity of the environment is too high, there is a possibility that the material will be calcified (CaO absorbs water to become Ca (OH)) due to the excessive humidity of the air in the cylinder 102Then with CO in the air2Reaction to form CaCO with strong adhesion3) Thereby blocking the passage of material within the cartridge 10. In order to solve the problems, referring to fig. 7, optionally, a bearing ring plate 14 can be arranged outside the cylinder 10, the lower part of the bearing ring plate 14 is in suspension flexible connection with a civil engineering bearing platform 200 through a suspension device 15, and the suspension device 15 is provided with a bearing ring plate 14And (3) installing a weighing device 16, connecting the barrel 10 with a lump removing device (not shown in the figure), connecting the weighing device 16 and the lump removing device with a controller, and flexibly connecting the feeding hole of the barrel 10 with the discharging hole 110 of the lime kiln. So set up, weigh the whole weight of barrel 10 through weighing device 16, judge when barrel 10 whole weight is risen suddenly that calcification nodulation appears in the barrel 10, open the device of clearing up the nodulation of calcification in with the barrel 10 this moment. Therefore, the normal operation of the winnowing and removing device can be ensured when the environmental humidity is overlarge. The tumor removing device can specifically adopt the existing electric vibration device, an air cannon or an electric arc cutting gun and the like.
Referring to fig. 8, the control method of the air separation removal 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 timeAverage)/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.
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 1.2 and 1.3.
Further, in the operation process of the air separation removal device, the weighing device 16 is used for obtaining the overall weight of the air separation removal device and sending the overall weight information of the air separation removal device to the controller, and when the overall weight of the air separation removal device exceeds a set value, the controller is controlled to start the nodule cleaning device to clean calcified nodules in the air separation removal device.
Example 2:
referring to fig. 2 to 7, 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 embodiment 1, 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 removal device and the lime kiln with the air separation removal device, a large amount of dust such as lime powder ore and residues after coal powder burning in the finished lime 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; the dust collecting device is arranged at the air outlet 11, so that the dust materials separated by winnowing can be collected, the resource can be recycled, and the dust collecting device has obvious effects of saving the process cost and improving the process economic benefit; through carrying out the flexible coupling with barrel 10 and limekiln discharge gate 110, set up weighing device 16 and clear away the tumour device to hang the flexible coupling with barrel 10 and civil engineering bearing platform 200, can in time clear up the calcification knot in the barrel 10, make the selection by winnowing desorption device still can normal operating under the great condition of ambient humidity.
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 selection by winnowing desorption device of lime kiln fine particle dust which characterized in that, selection by winnowing desorption device 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 air distribution grate plate (20), the air distribution grate plate (20) is horizontally arranged in the cylinder body (10), and a plurality of air distribution holes (21) are formed in the air distribution grate plate (20);
the air inlet device (30) is arranged at the lower part of the cylinder (10) and is positioned below the air distribution grate plate (20), and the air inlet device (30) is used for blowing air flow into the cylinder (10);
a dust concentration detector (40) installed at the air outlet (11) for detecting the concentration of dust in the gas discharged from the air outlet (11);
the dust concentration detector (40) and the air inlet device (30) are connected with the controller, and the controller is used for controlling the flow of the air flow blown into the cylinder body (10) according to the dust concentration of the gas exhausted from the air outlet (11).
2. The air separation and removal device for fine particle dust in a lime kiln as defined in claim 1, wherein the plurality of air distribution holes (21) of the air distribution grate plate (20) are uniformly distributed in an annular array or in a rectangular array.
3. The air separation removal device of fine particle dust of lime kiln as claimed in claim 1, characterized in that the 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.
4. The air separation and removal device for fine particle dust in lime kilns as claimed in claim 3, wherein an air inlet main pipe valve (35) is mounted on the air inlet main pipe (34), an air inlet branch pipe valve (36) is mounted on the air inlet branch pipe (33), and the air inlet main pipe valve (35) and the air inlet branch pipe valve (36) are both connected with the controller.
5. The air separation removal device for fine particle dust of lime kiln as claimed in claim 1, characterized in that the cylinder (10) comprises a vertical cylinder (12), the air distribution grate plate (20) is mounted in the vertical cylinder (12), the upper end of the vertical cylinder (12) is connected with a reducing cylinder (13), the diameter of the upper part of the reducing cylinder (13) is smaller than that of the lower part thereof, and the air outlet (11) is arranged at the upper part of the reducing cylinder (13).
6. The air separation and removal device for fine particle dust in the lime kiln as recited in claim 4, wherein a bearing ring plate (14) is arranged outside the cylinder (10), the lower part of the bearing ring plate (14) is in suspension flexible connection with a civil engineering bearing platform (200) through a suspension device (15), a weighing device (16) is installed on the suspension device (15), the cylinder (10) is further connected with a lump removing device, the weighing device (16) and the lump removing device are both connected with the controller, and the feeding hole of the cylinder (10) is in flexible connection with the discharging hole (110) of the lime kiln.
7. The method for controlling the apparatus for the air separation removal of fine particle dust from a lime kiln as set forth in claim 6, 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.
8. The method as claimed in claim 7, wherein the determining whether the dust concentration 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 timeAverage)/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.
9. The method for controlling an apparatus for the air separation removal of fine particle dust from a lime kiln as set forth in claim 7, further comprising:
s500: in the operation process of the air separation removal device, the weighing device (16) is used for acquiring the overall weight of the air separation removal device and sending the overall weight information of the air separation removal device to the controller, and when the overall weight of the air separation removal device exceeds a set value, the controller is used for controlling and starting the nodule cleaning device to clean calcified nodules in the air separation removal device.
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 1-6, the lime kiln outlet (110) being connected to the inlet in the air separation removal device by means of a material chute (120).
CN201911066901.XA 2019-11-04 2019-11-04 Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln Pending CN110788000A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911066901.XA CN110788000A (en) 2019-11-04 2019-11-04 Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911066901.XA CN110788000A (en) 2019-11-04 2019-11-04 Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln

Publications (1)

Publication Number Publication Date
CN110788000A true CN110788000A (en) 2020-02-14

Family

ID=69442702

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911066901.XA Pending CN110788000A (en) 2019-11-04 2019-11-04 Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln

Country Status (1)

Country Link
CN (1) CN110788000A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113750734A (en) * 2020-06-05 2021-12-07 湖南中冶长天节能环保技术有限公司 Gas-material separation method and device, transportation system and adsorption and desorption system
CN113857029A (en) * 2021-08-25 2021-12-31 界首市汇鑫机械科技有限公司 Combined environment-friendly cleaning sieve
CN113909120A (en) * 2020-07-08 2022-01-11 中冶长天国际工程有限责任公司 High-safety pre-judgment dust removing method and system
CN113941216A (en) * 2020-07-17 2022-01-18 中冶长天国际工程有限责任公司 Centrifugal type active carbon dust purification system and purification method thereof
CN114058839A (en) * 2020-08-07 2022-02-18 中冶长天国际工程有限责任公司 Sintering fuel granularity control device and control method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383614A (en) * 1993-10-12 1995-01-24 Panning; Martin H. Air seal for the product discharge of a cyclone separator or similar device
CN1235187A (en) * 1999-05-10 1999-11-17 王茂春 Fine coal granules and method and apparatus for producing the same
CN101406883A (en) * 2007-10-08 2009-04-15 上海金发科技发展有限公司 Device for separating powder on particle surface of plastic
CN201244552Y (en) * 2008-08-04 2009-05-27 贺占胥 Ultrasonic linear vibrating screen
CN102225392A (en) * 2011-04-08 2011-10-26 鞍山重型矿山机器股份有限公司 Intelligent vibrating sieve capable of preventing hole-blocking
CN103183484A (en) * 2013-04-01 2013-07-03 北京工业大学 Online all-directional monitoring method for PM 10 emission in cement plant
CN103263075A (en) * 2013-06-11 2013-08-28 红塔烟草(集团)有限责任公司 High-efficiency energy-saving threshing air separation new process and equipment
CN204294507U (en) * 2014-11-27 2015-04-29 宁晋晶兴电子材料有限公司 Process equipment removed by a kind of silica flour
CN204902563U (en) * 2015-08-25 2015-12-23 唐竹胜 Rotary kiln of even air feed of multiple hole heating
CN206315936U (en) * 2016-12-14 2017-07-11 陕西华秦农牧科技有限公司 A kind of corn light impurities cleaning plant

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383614A (en) * 1993-10-12 1995-01-24 Panning; Martin H. Air seal for the product discharge of a cyclone separator or similar device
CN1235187A (en) * 1999-05-10 1999-11-17 王茂春 Fine coal granules and method and apparatus for producing the same
CN101406883A (en) * 2007-10-08 2009-04-15 上海金发科技发展有限公司 Device for separating powder on particle surface of plastic
CN201244552Y (en) * 2008-08-04 2009-05-27 贺占胥 Ultrasonic linear vibrating screen
CN102225392A (en) * 2011-04-08 2011-10-26 鞍山重型矿山机器股份有限公司 Intelligent vibrating sieve capable of preventing hole-blocking
CN103183484A (en) * 2013-04-01 2013-07-03 北京工业大学 Online all-directional monitoring method for PM 10 emission in cement plant
CN103263075A (en) * 2013-06-11 2013-08-28 红塔烟草(集团)有限责任公司 High-efficiency energy-saving threshing air separation new process and equipment
CN204294507U (en) * 2014-11-27 2015-04-29 宁晋晶兴电子材料有限公司 Process equipment removed by a kind of silica flour
CN204902563U (en) * 2015-08-25 2015-12-23 唐竹胜 Rotary kiln of even air feed of multiple hole heating
CN206315936U (en) * 2016-12-14 2017-07-11 陕西华秦农牧科技有限公司 A kind of corn light impurities cleaning plant

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113750734A (en) * 2020-06-05 2021-12-07 湖南中冶长天节能环保技术有限公司 Gas-material separation method and device, transportation system and adsorption and desorption system
CN113750734B (en) * 2020-06-05 2023-06-23 湖南中冶长天节能环保技术有限公司 Gas-material separation method and device, transportation system and adsorption analysis system
CN113909120A (en) * 2020-07-08 2022-01-11 中冶长天国际工程有限责任公司 High-safety pre-judgment dust removing method and system
CN113909120B (en) * 2020-07-08 2022-08-16 中冶长天国际工程有限责任公司 High-safety pre-judgment dust removing method and system
CN113941216A (en) * 2020-07-17 2022-01-18 中冶长天国际工程有限责任公司 Centrifugal type active carbon dust purification system and purification method thereof
CN113941216B (en) * 2020-07-17 2023-12-29 中冶长天国际工程有限责任公司 Centrifugal activated carbon dust purification system and purification method thereof
CN114058839A (en) * 2020-08-07 2022-02-18 中冶长天国际工程有限责任公司 Sintering fuel granularity control device and control method
CN114058839B (en) * 2020-08-07 2023-06-23 中冶长天国际工程有限责任公司 Sintered fuel particle size control device and control method
CN113857029A (en) * 2021-08-25 2021-12-31 界首市汇鑫机械科技有限公司 Combined environment-friendly cleaning sieve

Similar Documents

Publication Publication Date Title
CN110788000A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln
CN110788003B (en) Control method of air separation device for removing fine particle dust of lime kiln
EP2607828B1 (en) System for calcining fine lime
CN201308903Y (en) Comprehensive sorting machine for civil living refuse
CN106556258A (en) Sintering mine sensible heat retracting device and its using method
CN109970375A (en) A kind of building gypsum plaster production line
CN103194561B (en) Device for directly adding sintering returned dust into ladle
CN110788002A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln with winnowing removal device
CN110787999A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln
CN101693217A (en) System and method for grinding bauxite by dry method
CN110788001B (en) Winnowing device for removing fine particle dust in lime kiln, control method and lime kiln
CN110773427A (en) Winnowing removal device for fine particle dust in lime kiln, control method and lime kiln
CN105463140B (en) A kind of high-temperature slag handles recovery system
CN110526601A (en) The mixing formula limekiln of high yield and saving energy
CN102701617B (en) Calcination production line and calcination method for industrial by-product gypsum
CN204185500U (en) Stainless steel slag is dried, pneumatic separation device
CN206891148U (en) A kind of bicyclic room alternately heating filters dirt intellectuality calciner plant certainly
CN208166073U (en) A kind of reduced titanium iron powder calcination rotary kiln blanking device
CN114669129A (en) Blast furnace casting house flue gas dust removal method
CN109536701B (en) Device and method for reducing powder content of lump ore
CN208139858U (en) A kind of rotary kiln exhaust gas dust-extraction unit
CN205909704U (en) Rotary kiln exhaust gas treatment equipment with detect function
CN111380359A (en) Double-heat-source rotational flow flash calcination system and double-heat-source rotational flow flash calcination method
CN209341715U (en) Hot wind desiccation furnace
CN101037305A (en) Cocurrent-counter current rotary kiln calcining technique process

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20200214

RJ01 Rejection of invention patent application after publication