CN203965823U - Moisture control system - Google Patents
Moisture control system Download PDFInfo
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- CN203965823U CN203965823U CN201420282891.XU CN201420282891U CN203965823U CN 203965823 U CN203965823 U CN 203965823U CN 201420282891 U CN201420282891 U CN 201420282891U CN 203965823 U CN203965823 U CN 203965823U
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Abstract
The utility model discloses a kind of moisture control system, mainly comprise: moisture controller, variable valve and mixer, moisture controller mainly comprises: water content detection unit, the first regulon and the second regulon, wherein, water content detection unit, couples mutually with the first regulon respectively; The first regulon, couples mutually with external detector, water content detection unit and the second regulon respectively; The second regulon, couples mutually with the first regulon and variable valve respectively; Variable valve, couples mutually with add water pipeline, the second regulon and mixer of outside respectively; Mixer, couples mutually with variable valve.The utility model receives feedforward and feedback quantity signal by two regulons, amount of water can be to material sintering in mixer time carries out Comprehensive Control, efficiently solves and can not accurately measure and cannot accurately control the problem of moisture sintered mixture moisture.
Description
Technical field
The utility model relates to material sintering moisture and regulates field, relates more specifically to a kind of moisture control system.
Background technology
Sintering, is the technological process that granular material is changed into DB, can be used for producing pottery, powder metallurgy, fire resistive material, hyperthermal material etc.In general, powder is after overmolding, and the DB obtaining by sintering is a kind of polycrystalline material, and its microstructure is made up of crystal, vitreum and pore.Sintering process directly affects crystallite dimension, pore size and grain-boundary shape and the distribution in microstructure.The performance of inorganic material is not only relevant with material composition (chemical composition and mineral composition), also has close relationship with the microstructure of material.
Sintering technology is widely used in industrial circle, especially iron and steel enterprise, and for now, in the process of steel enterprise sintering workshop sinter mixture, moisture control is most essential steps, by the material behavior that affects sintering and go out.
But in prior art, the difficult point of carrying out moisture control have following some:
1) the stagnant material time of mixer long, generally between 1.5～～3.5 minutes, belong to the large time delay time to control retardation time;
2): sintering feed is to be mixed by plurality of raw materials, complicated component, proportioning changes greatly and is frequent;
3): the trend that testing tool can only be measured sintering temperature and closes material moisture, can not Measurement accuracy sintered mixture moisture;
4): sinter mixture is that the moisture of the compound before mixer cannot detect at belt successively hierarchal arrangement from feed bin gets off.
All sintered mixture moisture detectors, but all cannot realize accurate measurement.
Therefore, how to solve and can not accurately measure and cannot accurately control moisture sintered mixture moisture, just become technical matters urgently to be resolved hurrily.
Utility model content
In view of this, technical problem to be solved in the utility model has been to provide a kind of moisture control system, can not accurately measure and cannot accurately control the problem of moisture sintered mixture moisture to solve.
In order to solve the problems of the technologies described above, the utility model discloses a kind of moisture control system, couple mutually with add water pipeline and external detector of outside, this moisture control system mainly comprises: moisture controller, variable valve and mixer, wherein, described moisture controller mainly comprises: water content detection unit, the first regulon and the second regulon, wherein
Described water content detection unit, couples mutually with described the first regulon respectively, for detection of the water cut in the sintering feed of described mixer output, and the water cut signal of generation is sent to described the first regulon;
Described the first regulon, couple mutually with described external detector, water content detection unit and the second regulon respectively, the described water cut signal sending for receiving predetermined amount of water signal, feed-forward signal and the described water content detection unit of described external detector transmission, generates comprehensive adjustment signal and is sent to described the second regulon;
Described the second regulon, couple mutually with described the first regulon and variable valve respectively, for receiving the described comprehensive adjustment signal of described the first regulon transmission and the flow value signal that adds water that described external detector sends, generate described control signal and be sent to described variable valve;
Described variable valve, couples mutually with add water pipeline, the second regulon and mixer of described outside respectively, for receiving the control signal that described the second regulon sends, the water supply of described mixer is controlled;
Described mixer, couples mutually with described variable valve, for material being carried out exporting after sintering under the confession water management at described variable valve.
Wherein, preferably, between described the first regulon and described the second regulon, further adopt the Cascade that receives multiple feed-forward signals and feedback signal to couple.
Wherein, preferably, described feed-forward signal, is further: input the water percentage signal before the weight of material signal of described mixer and/or described sintering feed mix.
Wherein, preferably, also comprise: delay unit, described delay unit couples mutually with described the second regulon and external detector, carries out being sent to described the second regulon after delay process for the heavy signal of sintering feed that the described external detector receiving is sent.
Wherein, preferably, described delay unit, further for by delay switch circuit, timer circuit and/or have the delay unit that the circuit of delay function forms.
Wherein, preferably, described the second regulon, further described the second regulon for being formed by the single loop control circuit of auto-compensation.
Wherein, preferably, described the first regulon, further described the first regulon for being formed by control circuit.
Compared with prior art, a kind of moisture control system described in the utility model, has reached following effect:
1) the utility model receives feedforward and feedback quantity signal by two regulons, amount of water can be to material sintering in mixer time carries out Comprehensive Control, efficiently solves and can not accurately measure and cannot accurately control the problem of moisture sintered mixture moisture.
2) the utility model by chronotron, starts to add water while allowing sintering feed enter best filling up area, moisture control that can the existing sintering plant sinter mixture of good conformity.
Certainly, implement arbitrary product of the present utility model and must not necessarily need to reach above-described all technique effects simultaneously.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a part of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structured flowchart of the moisture control system described in the utility model embodiment.
Fig. 2 is moisture control system described in the utility model embodiment structural drawing in the time of concrete application.
Fig. 3 is the concrete structure figure of the controller in Fig. 2.
Embodiment
Censure specific components as used some vocabulary in the middle of instructions and claim.Those skilled in the art should understand, and hardware manufacturer may be called same assembly with different nouns.This specification and claims are not used as distinguishing the mode of assembly with the difference of title, but the difference in function is used as the criterion of distinguishing with assembly.If " comprising " mentioned in the middle of instructions and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and electric property coupling means indirectly at this.Therefore, be coupled to one second device if describe a first device in literary composition, represent that described first device can directly be electrically coupled to described the second device, or be indirectly electrically coupled to described the second device by other devices or the means that couple.Instructions subsequent descriptions is for implementing preferred embodiments of the present utility model, and right described description is to illustrate that rule of the present utility model is object, not in order to limit scope of the present utility model.Protection domain of the present utility model is when being as the criterion depending on the claims person of defining.
As shown in Figure 1, for a kind of moisture control system described in the utility model, couple mutually with add water pipeline and external detector of outside, this system mainly comprises: moisture controller 10, variable valve 20 and mixer 30, this moisture controller 10 mainly comprises: water content detection unit 101, the first regulon 102 and the second regulon 103, wherein
Described water content detection unit 101, couples mutually with described the first regulon 102, the water cut in the sintering feed of exporting for detection of described mixer 30, and the water cut signal of generation is sent to described the first regulon 102.
Described the first regulon 102, couple mutually with described external detector, water content detection unit 101 and the second regulon 103 respectively, the described water cut signal sending for receiving predetermined amount of water signal, feed-forward signal and the described water content detection unit of described external detector transmission, generates comprehensive adjustment signal and is sent to described the second regulon 103.
Described the second regulon 103, couples mutually with described the first regulon 102 and variable valve 20 respectively, and the described comprehensive adjustment signal sending for receiving described the first regulon 102, generates described control signal and be sent to described variable valve 20.
Described variable valve 20, couples mutually with add water pipeline, the second regulon 103 and mixer 30 of described outside respectively, for receiving the control signal that described the second regulon 103 sends, the water supply of described mixer 30 is controlled.
Described mixer 30, couples mutually with described variable valve 20, for material being carried out exporting after sintering under the confession water management at described variable valve 20.
Between the first regulon 102 in the present embodiment and the second regulon 103, adopt the tandem control formula that receives multiple feed-forward signals and feedback signal to couple, this traditional tandem control formula couples the advantage of existing traditional cascade arrangement, overcome again the shortcoming of traditional cascade arrangement: in the present embodiment, the connected mode of the first regulon 102 and the second regulon 103 can receive multiple feed-forward signals and feedback signal, and traditional cascade arrangement can only receive two signals simultaneously.Thereby the utility model can be realized the accurate control to moisture.
Wherein, feed-forward signal comprises: the moisture value of total material weight, actual amount of water, detection, add water before sintering feed water percentage, should add water and/or target amount of water.
As shown in Figure 1, one's duty water control system 10 also comprises: delay unit 40, couple mutually with described the second regulon 103 and external detector respectively, carry out being sent to described the second regulon 103 after delay process for the heavy signal of sintering feed that the described external detector receiving is sent.
Described delay unit 40 can be specifically for by delay switch circuit, timer circuit and/or have the delay unit that the circuit of delay function forms.
In the time of practical application, the concrete structure of the moisture control system in the present embodiment as shown in Figure 2, compound is sent in mixer (for the mixer 30 in the present embodiment) and is carried out after sintering forming sintering feed by proportioning belt, and export from batch mixing belt, now, Moisture Meter (being the water content detection unit 101 in the present embodiment) detects the moisture in sintering feed, transfer to controller (for the moisture controller 10 in the present embodiment), the further regulating and controlling valve of controller (being the variable valve 20 in the present embodiment), to supplying water, size regulates.In addition, in Fig. 2, detect in real time weight of material at the belt conveyer scale of mixer inflow point, and heavy material signal is transferred in controller, controller will be controlled amount of water according to the heavy signal of material.Simultaneously, on the pipeline that adds water of outside, be also provided with flowmeter and stop valve, all couple mutually with controller, what flowmeter was monitored adds the number that discharge has reflected the water yield, controller can regulate according to the flow control regulating valve that adds water, and in the time reaching the water yield of setting, controller starts stop valve and adds water stopping.
It should be noted that, sintering feed has certain distance from the belt conveyer scale of mixer inflow point to the inner filling up area of mixer, mixer length exceedes 10 meters, reach most more than 24 meters, its filler pipe length is not identical yet, generally 6～～12 meters of left and right, for suitable filling up area is set, so delay unit 40 is set, starts to add water in the time that sintering feed just enters best filling up area.
In conjunction with Fig. 2 and 3, the moisture control system in the utility model, its concrete application is as follows:
Wherein, Fig. 3 is the concrete structure figure of the controller in Fig. 2, in Fig. 3, the feed-forward signal that external detector provides can comprise: VA: total material is heavy, VB: actual amount of water, PV: the moisture value of detection, VX: sintering feed water percentage, VP before adding water: should add water, SP: target amount of water, VM: " the sintering feed water percentage before adding water " of estimation.
VX value in the time that operating mode is stablized is VM, just can estimate and the VP that should add water that in good time material is heavy according to VM value, the VP that should add water now calculating so long as not large quantities of quantitative change material just reaches 90% to more than 95% amount of water substantially, according to the amount of water of the VP control system of calculating, the amount of water of 5% remaining left and right is controlled by the signal of water content detection unit 101.
Main signal is PV sintered mixture moisture measured value, sub signal is for adding discharge VB, feed-forward signal is the heavy VA of material, moisture water gaging rate VM before sinter mixture mixes, master selector is " the first regulon (adjusting of first in corresponding diagram 3) ", secondary controller is " the second regulon (adjusting of second in corresponding diagram 3) ", but main signal is only controlled total amount of water less than 10%, sub signal and feed-forward signal have been controlled the amount of water exceeding more than 90%, the first regulon and the second regulon are the distortion of a typical tandem control, it differs from tandem control, classical tandem control signal is difficult to adjust, control mode in the present embodiment can overcome large interference and large load variations, the maximum of loading in Practical Project is changed to material and weighs 50%, still can stable operation.
In the time that moisture controller moves, PV in regulon approximates SP, the output of the first regulon keeps a constant definite value, " Δ OP " is " 0 " value with the output of " quantification ", SP2 in the second regulon equals the VP that should add water, now participate in heavy this actual signal of the material that in fact only has sinter mixture of controlling, now variable valve is followed the variation that material is heavy and is changed, materials in the tube heavily do not change much amount of water and can follow, now in the time that pressure in water-adding system changes, thereby variable valve also can make to add discharge from motion tracking auto-compensation and remains unchanged
After regulon is followed according to sintering feed readjust amount of water, water content detection unit detects the water percentage VP of the compound in mixer exit in good time, adjust amount of water according to the value of desired value SP and VP in good time, in the time that VP is not equal to SP, the output of the first regulon changes, " Δ OP " all changes with the output of " quantification ", in the time of VP-SP>0, the output of the first regulon reduces, " Δ OP " is all less than 0 with the output of " quantification ", in the time of VP-SP<0, the output of the first regulon 102 increases, " Δ OP " is all greater than 0 with the output of " quantification ", and " comprehensively " should add water in fact exactly and be added with the output of " quantification ", its result is sent the end of the SP2 in " the second regulon ", " the first regulon " works for retroaction mode, " the second regulon " works for positive interaction mode.
Mixer in operating mode is a large Control Systems with Time Delays, retardation time, overlength reached 4 minutes most, in regulon, due to feed-forward signal material, heavily to account for the ratio of control great, it has weakened large time delay greatly on the impact of controlling, and that is to say and has overcome the unfavorable factor that large time delay brings to operating mode adding of feedforward.
The principal element that affects sintering feed moisture in sintering operating mode also has quicklime slaking, dedusting ash addition, the addition of lime stone, the addition of Calx returning except the heavy secret proportioning of total material, in our " control system ", also increase to have for this reason and overcome the impact of quicklime slaking on sintered mixture moisture content, overcome to return mine and change the impact on sintered mixture moisture content, overcome dedusting ash and change the impact on sintered mixture moisture content
In the time that unslaked lime blanking changes, regulon is according to dropping into the signal write down of automatic instantaneous, the estimation digestion now variable quantity that adds water, then in total amount of water (VP should add water), deduct corresponding variable quantity.
In control procedure, when control mode is by being manually switched to automatic moment, first blanking, digestion amount of water, the quicklime slaking of preserving the unslaked lime ratio that adds water, VS1-→ VS2, VI1-→ VI2, KI-→ KI1, calculate according to condition the variable quantity " Δ VI " that digestion adds water again, the impact will be in " Δ VI " introducing " comprehensively " cumulative, variation that just can customer service quicklime slaking brings operating mode.Particularly:
VS1: unslaked lime material is heavy, VI1: raw stone digestion adds discharge, VS2: the unslaked lime material tuple of preservation is according to, VI2: the raw stone digestion of preservation add water data on flows, Δ VS: unslaked lime weight change amount, Δ VI: raw stone digestion add water fluctuations in discharge amount, KI: quicklime slaking add water ratio, KI1: preserve digestion add water ratio data, VK: digest and answer amount of water; Wherein,
KI＝VI1/VS1、VK＝VS1*KI1、ΔVI＝VK-VI2
Use the same method and can calculate the variation delta VF that adds water, the dedusting ash of returning mine variation delta VQ, the lime stone variation delta VH that adds water that adds water, finally VP, Δ VI, Δ VF, Δ VQ, Δ VH are all introduced to stack in " quantification ", as follows:
SP2＝VP+ΔVI+ΔVF+ΔVQ+ΔVH
SP2 in " the second regulon " is its desired value, SP2 in formula is the value having quantized, the unit of SP2 in " the second regulon " and PV2 (measured value of flowmeter) is " T/H ", " the second regulon " is a pure flow control, belong to typical single loop control, due to the specific function of " the second regulon ", thereby it can make its stability of flow constant by auto-compensation in the time that the pressure of water-adding system in operating mode changes.
Because the sintering feed water content detection in reality is a difficult point, all sintering feed moisture detectors all can only detect the moisture variation tendency of sintering feed, and can only under a certain specified conditions of a certain section, there is the characteristic of trend, for this reason in the present embodiment, not only weaken the control dynamics of moisture and also set its bound that can control simultaneously, in practical operation, needing only parameter arranges rationally, the effect that just can embody principal parameter can be avoided again the short slab of drimeter, the effect of K1 is the reference mark of definite " the first regulon ", the effect of K2 is to control the control dynamics of principal parameter but the negotiability that adds outlet capacity and variable valve of it and system has substantial connection, it can only determine in concrete engineering, and high limit and lower bound be generally made as answer amount of water VP ± 1.5～± 3.5T/H left and right is specifically suitably adjusted depending on the size of sintering machine.
Moisture control system in the present embodiment just can adapt to the moisture control to sinter mixture in existing sintering process by the way.
Compared with prior art, a kind of moisture control system described in the utility model, has reached following effect:
1) the utility model receives feedforward and feedback quantity signal by two regulons, amount of water can be to material sintering in mixer time carries out Comprehensive Control, efficiently solves and can not accurately measure and cannot accurately control the problem of moisture sintered mixture moisture.
2) the utility model by chronotron, starts to add water while allowing sintering feed enter best filling up area, moisture control that can the existing sintering plant sinter mixture of good conformity.
Also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, commodity or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, commodity or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, commodity or the equipment that comprises described key element and also have other identical element.
It will be understood by those skilled in the art that embodiment of the present utility model can be provided as method, system or computer program.Therefore, the utility model can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the utility model can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The foregoing is only embodiment of the present utility model, be not limited to the utility model.To those skilled in the art, the utility model can have various modifications and variations.All any amendments of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model within spirit of the present utility model and principle.
Claims (7)
1. a moisture control system, couple mutually with add water pipeline and external detector of outside, it is characterized in that, this moisture control system mainly comprises: moisture controller, variable valve and mixer, wherein, described moisture controller mainly comprises: water content detection unit, the first regulon and the second regulon, wherein
Described water content detection unit, couples mutually with described the first regulon respectively, for detection of the water cut in the sintering feed of described mixer output, and the water cut signal of generation is sent to described the first regulon;
Described the first regulon, couple mutually with described external detector, water content detection unit and the second regulon respectively, the described water cut signal sending for receiving predetermined amount of water signal, feed-forward signal and the described water content detection unit of described external detector transmission, generates comprehensive adjustment signal and is sent to described the second regulon;
Described the second regulon, couples mutually with described the first regulon and variable valve respectively, and the described comprehensive adjustment signal sending for receiving described the first regulon, generates described control signal and be sent to described variable valve;
Described variable valve, couples mutually with add water pipeline, the second regulon and mixer of described outside respectively, for receiving the control signal that described the second regulon sends, the water supply of described mixer is controlled;
Described mixer, couples mutually with described variable valve, for material being carried out exporting after sintering under the confession water management at described variable valve.
2. moisture control system as claimed in claim 1, is characterized in that, further adopts the tandem control formula that receives multiple feed-forward signals and feedback signal to couple between described the first regulon and described the second regulon.
3. moisture control system as claimed in claim 2, is characterized in that, described feed-forward signal is further: input the water percentage signal before the weight of material signal of described mixer and/or described sintering feed mix.
4. moisture control system as claimed in claim 1, it is characterized in that, also comprise: delay unit, described delay unit couples mutually with described the second regulon and external detector, carries out delay process for the heavy signal of sintering feed that the described external detector receiving is sent.
5. moisture control system as claimed in claim 4, is characterized in that, described delay unit, further for by delay switch circuit, timer circuit and/or have the delay unit that the circuit of delay function forms.
6. moisture control system as claimed in claim 1, is characterized in that, described the second regulon, further described the second regulon for being made up of the single loop control circuit of auto-compensation.
7. moisture control system as claimed in claim 1, is characterized in that, described the first regulon, further described the first regulon for being made up of control circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420282891.XU CN203965823U (en) | 2014-05-29 | 2014-05-29 | Moisture control system |
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| CN201420282891.XU CN203965823U (en) | 2014-05-29 | 2014-05-29 | Moisture control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828614A (en) * | 2019-01-31 | 2019-05-31 | 青岛众志测控技术有限公司 | A kind of automatic control of sintering process water-adding system |
| CN114442710A (en) * | 2022-01-24 | 2022-05-06 | 中冶长天国际工程有限责任公司 | Water supply control system and method for material mixing and pelletizing process and storage medium |
| CN115055107A (en) * | 2022-05-26 | 2022-09-16 | 包头钢铁（集团）有限责任公司 | Sintering machine mixture water control method and system |
-
2014
- 2014-05-29 CN CN201420282891.XU patent/CN203965823U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109828614A (en) * | 2019-01-31 | 2019-05-31 | 青岛众志测控技术有限公司 | A kind of automatic control of sintering process water-adding system |
| CN114442710A (en) * | 2022-01-24 | 2022-05-06 | 中冶长天国际工程有限责任公司 | Water supply control system and method for material mixing and pelletizing process and storage medium |
| CN114442710B (en) * | 2022-01-24 | 2023-02-28 | 中冶长天国际工程有限责任公司 | Water supply control system and method for material mixing and pelletizing process and storage medium |
| CN115055107A (en) * | 2022-05-26 | 2022-09-16 | 包头钢铁（集团）有限责任公司 | Sintering machine mixture water control method and system |
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