CN104724479B - System and method for blending power heat coal - Google Patents

Abstract

The invention discloses a system and a method for blending power heat coal. The system comprises a raw coal conveyor, K raw coal blending branches, a mixed coal conveyor, coal mixing equipment and a finished coal bunker or yard. A type of raw coal can be blended by each raw coal blending branch, each raw coal blending branch comprises a raw coal bunker, a discharge outlet/hopper of the raw coal bunker and a raw coal speed regulation conveyor; each raw coal blending branch further comprises a heat coal blending device, and each heat coal blending device is used for measuring heat values Q＜adi coal k＞ and weights W＜i coal k＞ of the raw coal, computing values J＜i coal k＞, regulating the conveying speeds of the corresponding raw coal speed regulation conveyor according to the values J＜i coal k＞ and reducing the values J＜ J＜i coal k＞, so that the values J＜i coal k＞ are approximately equal to values J＜control coal k＞ and meet an equation of J＜i coal k≥J＜control coal k＞-J＜i coal k＞, and values J＜i coal k＞ meet an equation of J＜i coal k≥Q＜adi coal k＞*W＜i coal k＞. The system and the method have the advantage that heat coal blending closed-loop control and heat value closed-loop control can be implemented on the premise that raw coal flow ratios of the various raw coal blending branches are guaranteed.

Description

A kind of power heat Coal Blending System and its method

Technical field

The present invention relates to dynamic blending coals, particularly to by the power heat Coal Blending System of each feed coal heat coal blending and its side Method.

Background technology

Rich coal resources in China, extensively, throughout the main provinces and cities in the whole nation, and ature of coal is considerably complicated, and difference is very big in the place of production, plus User various, such as electric boiler, Industrial Boiler, coal tar, cement kiln etc..How to be provided using the coal of each place of production difference ature of coal Source, can meet the respective requirement of variant user again, be dynamic blending coals vital task to be solved.

Dynamic blending coals are the requirements according to user to ature of coal, by some variety classeses, coal of different nature, by constant weight Ratio is mixed and is joined a kind of new coal (thermal coal) processing, that is, utilizes various coals difference in nature, learns from other's strong points to offset one's weaknesses, mixes It is made into the thermal coal that bulk properties reach optimum state, to meet the needs of user.In existing Coal Blending Technology, by coal blending mode Have：Storehouse is mixing, bed is mixing, band is mixing；Have by coal blending process：Underground coal blending process and simple storehouse formula coal blending process, wherein with simple storehouse Formula application is more.

Fig. 1 show letter storehouse of the prior art formula Coal Blending System and constitutes schematic diagram.This system includes feed coal conveyer 1st, (each feed coal coal blending branch road comprises raw material coal bunker 3-k, spiral shell to belt plow 2-k, K feed coal coal blending branch road m1-mK Skiving cutter dispenser 4-k, feed coal speed governing conveyer 5-k and belted electronic balance 6-k), mixed coal conveyer 7, mixed coal equipment 8 and Power coal bunker 9 (or stock ground).

Each feed coal is delivered to belt plow 2-k by feed coal conveyer 1, under its corresponding control, each feed coal is divided It is assigned to each raw material coal bunker 3-k storage accordingly, during coal blending, the feed coal of each raw material coal bunker 3-k storage is scraped through respective spiral Knife dispenser 4-k, feed coal is delivered to corresponding feed coal speed governing conveyer 5-k and weighs through belted electronic balance 6-k.By each From spiral scraper dispenser 4-k and belted electronic balance 6-k linkage reach accurate flow and control, realize joining by weight proportion Coal.

Each the feed coal of feed coal speed governing conveyer 5-k conveying, delivers to mixed coal equipment 8 through mixed coal conveyer 7 and carries out Mixing and homogenization, then deliver to power coal bunker 9 (or stock ground).

The problem that existing dynamic blending coals exist has：

1) user is mainly ature of coal heat to thermal coal coal quality requirements and stablizes (caloric value is stable), and the ature of coal of each feed coal is good Bad (amount of heat) and the heat of thermal coal are stablized directly related, and existing dynamic blending coals system is coal blending by weight proportion, In coal blending process, it is not connected with the ature of coal quality of each feed coal although each feed coal ature of coal parameter can be done with offline survey Amount, in order to adjust the weight of each feed coal, but due to time of measuring long it is impossible to accomplish in time according to feed coal coal varitation and When regulating weight.Each feed coal coal varitation, affects thermal coal ature of coal stability.

2) existing dynamic blending coals system, in coal blending process, be not carried out thermal coal ature of coal (caloric value) on-line measurement with Control, thus can not preferably guarantee the calorific value of coal of thermal coal stably.

The problem existing for existing dynamic blending coals system, the invention discloses a kind of power heat Coal Blending System, its energy Meeting the requirement by constant weight ratio for each feed coal, can carried out by each feed coal according to the coal varitation of each feed coal again Heat carries out coal blending, additionally, this heat Coal Blending System can also in coal blending process, realize power calorific value of coal on-line measurement with Control, reach stablizing of the ature of coal quality improving thermal coal.

Content of the invention

Present invention solves the technical problem that being, realize by each feed coal part by weight requirement, according to each feed coal ature of coal Good and bad and press heat coal supply.

Further, the present invention can also realize power calorific value of coal on-line measurement and control in coal blending process.

For solving the above problems, the invention discloses a kind of power heat Coal Blending System, it is used for mixing and joins thermal coal, this system Including：

K feed coal coal blending branch road, K is the natural number more than or equal to 2, and each feed coal coal blending branch road is mixed and joined a kind of raw material Coal, each feed coal coal blending branch road includes：Raw material coal bunker, feed coal feed bin discharge hole/raw material coal bunker hopper, feed coal are adjusted Fast conveyer；

Mixed coal conveyer, for conveying the feed coal of this K feed coal coal blending branch road output；

Mixed coal equipment, for various the mixing of feed coal being exported this mixed coal conveyer；

Power coal bunker or stock ground, for storing the thermal coal of this mixed coal equipment output；

Each this feed coal coal blending branch road also includes a heat coal-blending device, in the feed coal coal blending branch road of place Feed coal on feed coal speed governing conveyer carries out caloric value Q_{Adi coal k}With weight W_{I coal k}Measurement, and calculate Δ J_{I coal k}, according to Δ J_{I coal k} The transporting velocity adjusting this feed coal speed governing conveyer is to increase or to reduce this weight W_{I coal k}, reduce Δ J_{I coal k}, make J_{I coal k}With J_{Control coal k} It is close, realize each feed coal coal blending branch road by heat coal blending；

Wherein, Δ J_{I coal k}=J_{Control coal k}-J_{I coal k}, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

This J_{I coal k}For the heat of the feed coal on the feed coal speed governing conveyer in k-th feed coal coal blending branch road, J_{Control coal k}For The control calorie value of the feed coal in k-th feed coal coal blending branch road, J_{Control coal k}=P_k×Q_{Ad moves}, Q_{Ad moves}Rated thermal for thermal coal Amount, P_kFlow for the feed coal in k-th feed coal coal blending branch road accounts for the flow proportional of all feed coals.

This system also includes：Data processing controller, for receiving the feed coal being derived from this K feed coal coal blending branch road Heat J_{I coal k}With weight W_{I coal k}, and calculate Δ Q_{Adi moves}, according to this Δ Q_{Adi moves}Revise J_{Control coal k}, obtain J_{Control coal k}', by this J_{Control coal k}' be sent to Heat coal-blending device in k-th feed coal coal blending branch road is so as to press J according to this_{Control coal k}' carry out heat coal blending, to reduce Δ Q_{Adi moves}, Make Q_{Ad moves}With Q_{Adi moves}It is close, realize caloric value On-line Control, wherein,

ΔQ_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}

J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})

N and m is the data acquisition number of times of this heat coal-blending device, n>M, this n time collection formerly, gathers rear for this m time,Represent the m secondary data sum in rear collection in k-th feed coal coal blending branch road,Represent k-th feed coal The m data deducting formerly in the n data that in coal blending branch road, heat coal-blending device first gathers is sued for peace again, K_QFor calibration coefficient, J_{Control coal k}' be revised feed coal in k-th feed coal coal blending branch road control calorie value, Q_{Ad moves}For thermal coal rated thermal Amount, Q_{Adi moves}Power calorific value of coal for measurement.

This heat coal-blending device further includes：

Caloric value on-line measurement instrument, for measuring caloric value Q of feed coal_{Adi coal k}；

Weight-measuring device, for measuring weight W of feed coal_{I coal k}；

Data acquisition controller, for receiving Q_{Adi coal k}、W_{I coal k}And J_{Control coal k}', calculate Δ J_{I coal k}',

ΔJ_{I coal k}'=J_{Control coal k}’-J_{I coal k}, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

This data acquisition controller is according to this Δ J_{I coal k}' signal is sent to this feed coal buncher, to increase or decrease this Weight W_{I coal k}, reduce Δ J_{I coal k}', reach J_{I coal k}With J_{Control coal k}' be close, realize pressing heat coal blending.

This caloric value on-line measurement instrument is X-ray caloric value on-line measurement instrument or gamma-rays caloric value on-line measurement instrument；

This weight-measuring device is belted electronic balance or X-ray scale, or gravimetric feeder.

Described system also includes a caloric value on-line measurement instrument, is arranged on above this mixed coal conveyer, for this mixed coal The power calorific value of coal Q of the thermal coal of conveyer conveying_{Adi moves}Measure；

This data processing controller calculates Δ Q_{Adi moves}, Δ Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and revise the control of each feed coal accordingly Calorie value J_{Control coal k}, obtain J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})；

This data processing controller is by this J_{Control coal k}' it is sent to heat coal-blending device in corresponding feed coal coal blending branch road, respectively Heat coal-blending device presses respective J_{Control coal k}' carry out heat coal blending, reduce difference DELTA Q_{Adi moves}, so that Q_{Adi moves}With specified Q_{Ad moves}It is close, Realize caloric value On-line Control.

The invention also discloses a kind of power heat blending method, including：

Step 101, conveys K kind feed coal respectively using K feed coal coal blending branch road, using each feed coal coal blending branch road In heat coal-blending device measure every kind of feed coal caloric value Q_{Adi coal k}With weight W_{I coal k}；

Step 102, calculates the heat J of feed coal using the heat coal-blending device in each feed coal coal blending branch road_{I coal k}, its In, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

Step 103, calculates Δ J_{I coal k}, Δ J_{I coal k}=J_{Control coal k}-J_{I coal k}, J_{Control coal k}For the feed coal in k-th feed coal coal blending branch road Control calorie value, J_{Control coal k}=P_k×Q_{Ad moves}, Q_{Ad moves}For the rated thermal amount of thermal coal, P_kFor in k-th feed coal coal blending branch road Feed coal flow account for the flow proportional of all feed coals；

Step 104, according to Δ J_{I coal k}The transporting velocity of the feed coal speed governing conveyer in regulation feed coal coal blending branch road is to increase Big or reduce this weight W_{I coal k}, reduce Δ J_{I coal k}, make J_{I coal k}With J_{Control coal k}It is close, realize each feed coal by heat coal blending.

Receive the heat J of the feed coal from this K feed coal coal blending branch road using a data processing controller respectively_{I coal k} With weight W_{I coal k}, and calculate Δ Q_{Adi moves}, according to this Δ Q_{Adi moves}Revise respective J_{Control coal k}, obtain J_{Control coal k}', by this J_{Control coal k}' it is sent to kth Heat coal-blending device in individual feed coal coal blending branch road, heat coal-blending device is according to J_{Control coal k}' carry out coal blending, to reduce Δ Q_{Adi moves}, Make Q_{Ad moves}With Q_{Adi moves}It is close, realize caloric value On-line Control, wherein,

ΔQ_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}

J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})

N and m is the data acquisition number of times of this heat coal-blending device, n>M, this n time collection formerly, gathers rear for this m time,Represent the m secondary data sum in rear collection in k-th feed coal coal blending branch road,Represent k-th feed coal The n data that in coal blending branch road, heat coal-blending device first gathers deducts m data formerly in this n data and sues for peace, K_QFor Calibration coefficient, J_{Control coal k}' be revised feed coal in k-th feed coal coal blending branch road control calorie value, Q_{Ad moves}For thermal coal Rated thermal amount, Q_{Adi moves}Power calorific value of coal for measurement.

N=T2/T1, m=T3/T1, T1 adjust control time for heat coal blending, and T2 is the mixed coal time, and T3 adjusts for caloric value Section control time.

The data acquisition controller of this heat coal-blending device receives Q_{Adi coal k}、W_{I coal k}And J_{Control coal k}', calculate Δ J_{I coal k}',

ΔJ_{I coal k}'=J_{Control coal k}’-J_{I coal k}；

This data acquisition controller is according to this Δ J_{I coal k}' signal is sent to this feed coal buncher, to increase or decrease this Weight W_{I coal k}, reduce Δ J_{I coal k}', reach J_{I coal k}With J_{Control coal k}' be close, realize pressing heat coal blending.

The power calorific value of coal Q of the thermal coal of measurement mixed coal conveyer conveying_{Adi moves}；

This data processing controller calculates Δ Q_{Adi moves}, Δ Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and revise the control of each feed coal accordingly Calorie value J_{Control coal k}, obtain J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})；

This data processing controller is by this J_{Control coal k}' it is sent to heat coal-blending device in corresponding feed coal coal blending branch road, respectively Heat coal-blending device presses respective J_{Control coal k}' carry out heat coal blending, reduce difference DELTA Q_{Adi moves}, so that Q_{Adi moves}With specified Q_{Ad moves}It is close, Realize caloric value On-line Control.

The present invention, can be simultaneously according to each feed coal on the premise of the feed coal flow-rate ratio ensureing each feed coal coal blending branch road Ature of coal quality realizes heat coal blending and power calorific value of coal closed-loop control, realizes power heat coal blending, improves resource utilization, Reduce energy resource consumption, improve the thermal efficiency.

Brief description

Fig. 1 show letter storehouse of the prior art formula Coal Blending System and constitutes schematic diagram.

Fig. 2 show the structural representation one of the power heat Coal Blending System of the present invention.

Fig. 3 show the heat coal-blending device A of the present invention_KStructural representation.

Fig. 4 show the structural representation two of the power heat Coal Blending System of the present invention.

Fig. 5 gives the power heat Coal Blending System control flow schematic diagram of invention.Wherein, reference：

2-1～2-k belt plow 3-1～3-k raw material coal bunker

4-1～4-k spiral scraper dispenser 5-1～5-k feed coal speed governing conveyer

6-1～6-k belted electronic balance 7 mixed coal conveyer

8 mixed coal equipment 9 power coal bunker (or stock ground)

A₁～A_kHeat coal-blending device

B data processing controller

103 caloric value on-line measurement instrument

104 weighing devices

B data processing controller

11 caloric value on-line measurement instrument

Specific embodiment

The present invention on the basis of existing technology, is further provided with heat coal-blending device in each dynamic blending coals branch road A_k(A₁、A₂、…A_K), meanwhile, belted electronic balance 6-k of the prior art is no longer set.Shown in Figure 2 dynamic for the present invention The structural representation of power heat Coal Blending System.It is illustrated in figure 3 heat coal-blending device A_kStructural representation.

This heat coal-blending device A_kFurther include caloric value on-line measurement instrument 103, for measuring feed coal speed governing conveying Caloric value Q of the feed coal on machine 5-k_{Adi coal k}；Also include weight-measuring device 104, for measuring feed coal speed governing conveyer 5-k Feed coal weight W_{I coal k}；Also include data acquisition controller 105.

Introduce this heat coal-blending device A in detail below_kThe course of work, each heat coal-blending device A_kThe course of work equal Identical.

In order to ensure that power heat Coal Blending System by each feed coal part by weight requirement and can meet user to thermal coal Caloric value requires, and need to set rated thermal amount Q of thermal coal first_{Ad moves}.Secondly, according to the coal property of each feed coal, select former The species of material coal and coal number K.Used less according to high-quality high price coal, the multiplex principle of low price coal inferior, set P_k, k= 2nd ..., K, P_kAccount for the flow proportional of all feed coals for the feed coal flow in k-th feed coal coal blending branch road.

According to Q_{Ad moves}And P₁, P₂…P_KCan determine that the feed coal of various feed coals controls calorie value J_{Control coal k}.

Wherein, J_{Control coal 1}=P₁×Q_{Ad moves},

J_{Control coal 2}=P₂×Q_{Ad moves}

J_{Control coal K}=P_K×Q_{Ad moves}

Data acquisition controller 105 in k-th feed coal coal blending branch road is according to the caloric value on-line measurement in this branch road Instrument 103 records caloric value Q of the feed coal in this branch road_{Adi coal k}, and weight W that weight-measuring device 104 records_{I coal k}, calculate Δ J_{I coal k}, This data acquisition controller 105 is according to Δ J_{I coal k}The transporting velocity adjusting feed coal speed governing conveyer 5-k in this branch road is to increase Or reduce weight W of conveyed feed coal_{I coal k}, and then reduce Δ J_{I coal k}, make J_{I coal k}With J_{Control coal k}It is close, realize joining by heat Coal；

Wherein, Δ J_{I coal k}=J_{Control coal k}-J_{I coal k}(1)

J_{I coal k}=Q_{Adi coal k}×W_{I coal k}(2)

This J_{I coal k}Heat for the feed coal on the feed coal speed governing conveyer that records in k-th feed coal coal blending branch road.

Specifically, Δ J_{I coal k}/Q_{Adi coal k}=Δ W_{I coal k}, this data acquisition controller 105 can be according to Δ W_{I coal k}Adjust feed coal The coal-supplying amount of speed governing conveyer 5-k, increaseds or decreases W_{I coal k}, to reduce Δ J_{I coal k}, make the J of each feed coal_{I coal k}With respective control Calorie value J_{Control coal k}It is close, realize pressing J_{Control coal k}Requirement carries out heat coal blending.

One data processing controller B is further set, and this data processing controller B receives and is derived from K feed coal coal blending The heat J of the respective feed coal of branch road_{I coal k}With weight W_{I coal k}, and each branch road is sent with revised feed coal control calorie value J_{Control coal k}’.

Data processing controller B, according to each feed coal coal blending branch road, calculates respectivelyValue with AndValue.

Wherein, n and m is this heat coal-blending device A_kDATA REASONING times of collection, n>M, gathers for this n time formerly, this m Secondary collection rear,Represent the J corresponding in the m secondary data of rear collection in k-th feed coal coal blending branch road_{I coal k}Accumulation Value,Represent the n data that in k-th feed coal coal blending branch road, heat coal-blending device first gathers and deduct this n data In m data formerly sue for peace again.

Wherein, n=T2/T1, m=T3/T1, T1 adjust control time (every T for heat coal blending₁Time heat coal blending one Secondary), T2 is the mixed coal time (mixed coal equipment homogenising time), and T3 adjusts control time (every T for caloric value₃Time adjusts to caloric value Section controls once).

Subsequently, data processing controller B calculates power calorific value of coal Q_{Adi moves}.

K_QFor calibration coefficient.

Wherein, K_Q=Q_{Ad marks}/Q_{Ad surveys}

Q_{Ad marks}Take thermal coal coal sample, the calorific value that off-line measurement coal sample obtains, and Q in the measurement t time_{Ad surveys}For surveying In the amount t time, its formula (3) is in K_QThe thermal coal calorific value that when=1, measurement obtains.

Subsequently, data processing controller B calculates Δ Q_{Adi moves}.

ΔQ_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}

Data processing controller B is according to Δ Q_{Adi moves}Revise the J of each feed coal coal blending branch road_{Control coal k}.

J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})

J_{Control coal k}' be revised feed coal in k-th feed coal coal blending branch road control calorie value.

Data processing controller B is by J_{Control coal k}' send to k-th feed coal coal blending branch road, corresponding heat coal-blending device A_k's Data acquisition controller 105, data acquisition controller 105 presses the control calorie value J of revised feed coal_{Control coal k}' carry out heat Coal supply.

This caloric value on-line measurement instrument 103 is X-ray caloric value on-line measurement instrument or gamma-rays caloric value on-line measurement Instrument；This weight-measuring device 104 is belted electronic balance or X-ray scale, or gravimetric feeder.

Further, as shown in figure 4, above mixed coal conveyer 7, being additionally provided with another caloric value on-line measurement instrument 11, for measuring the power calorific value of coal Q of this mixed coal conveyer 7 conveying_{Adi moves}, and by this power calorific value of coal Q_{Adi moves}Send to this Data processing controller B.

This data processing controller B calculates Δ Q accordingly_{Adi moves}, Δ Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and revise each feed coal accordingly Former control calorie value J_{Control coal k}, obtain J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves}).

This data processing controller B is by this J_{Control coal k}' be sent in corresponding k-th feed coal coal blending branch road heat coal blending dress Put A_k, the heat coal-blending device A of this k-th feed coal coal blending branch road_kData acquisition controller 105 press this J_{Control coal k}' carry out heat Coal blending, reduces difference DELTA Q_{Adi moves}, so that Q_{Adi moves}With specified Q_{Ad moves}It is close, realize caloric value On-line Control.

Corresponding with above-mentioned power heat Coal Blending System, the invention also discloses a kind of power heat blending method, bag Include：

Step 101, is mixed respectively using K feed coal coal blending branch road and joins K kind feed coal, using each feed coal coal blending branch road In heat coal-blending device measure every kind of feed coal caloric value Q_{Adi coal k}With weight W_{I coal k}；

Step 102, using the heat coal-blending device A in each feed coal coal blending branch road_kCalculate the heat of each feed coal J_{I coal k}, wherein, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

Step 103, calculates Δ J_{I coal k}, Δ J_{I coal k}=J_{Control coal k}-J_{I coal k}, J_{Control coal k}For the feed coal in k-th feed coal coal blending branch road Control calorie value, J_{Control coal k}=P_k×Q_{Ad moves}, Q_{Ad moves}For the rated thermal amount of thermal coal, P_kFor in k-th feed coal coal blending branch road Feed coal flow account for the flow proportional of all feed coal flows；

Step 104, according to Δ J_{I coal k}The transporting velocity of the feed coal speed governing conveyer in regulation feed coal coal blending branch road is to increase Big or reduce this weight W_{I coal k}, reduce Δ J_{I coal k}, make J_{I coal k}With J_{Control coal k}It is close, realize pressing heat coal blending.

The method may also include：

Step 105, receives the feed coal from this K feed coal coal blending branch road respectively using a data processing controller Heat J_{I coal k}With weight W_{I coal k}, and calculate Δ Q_{Adi moves}, according to this Δ Q_{Adi moves}Revise J_{Control coal k}, obtain J_{Control coal k}', by this J_{Control coal k}' be sent to Heat coal-blending device in k-th feed coal coal blending branch road, this heat coal-blending device is according to J_{Control coal k}' carry out heat coal blending, to drop Low Δ Q_{Adi moves}, make Q_{Ad moves}With Q_{Adi moves}It is close, realize caloric value On-line Control, wherein,

ΔQ_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}

J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})

N and m is the data acquisition number of times of this heat coal-blending device, n>M, this n time collection formerly, gathers rear for this m time,Represent the m secondary data sum in rear collection in k-th feed coal coal blending branch road,Represent k-th feed coal The n data that in coal blending branch road, heat coal-blending device first gathers deducts m data formerly in this n data and sues for peace, K_QFor Calibration coefficient, J_{Control coal k}' be revised feed coal in k-th feed coal coal blending branch road control calorie value, Q_{Ad moves}For thermal coal Rated thermal amount, Q_{Adi moves}Power calorific value of coal for measurement.

The method may also include：

Step 106, the data acquisition controller 105 of this heat coal-blending device receives Q_{Adi coal k}、W_{I coal k}And J_{Control coal k}', calculate ΔJ_{I coal k}',

ΔJ_{I coal k}'=J_{Control coal k}’-J_{I coal k}；

This data acquisition controller is according to this Δ J_{I coal k}' signal is sent to this feed coal buncher, to increase or decrease this Weight W_{I coal k}, reduce Δ J_{I coal k}', reach J_{I coal k}With J_{Control coal k}' be close, realize pressing heat coal blending.

The method may also include：

Step 107, measures power calorific value of coal Q_{Adi moves}；

This data processing controller calculates Δ Q_{Adi moves}, Δ Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and revise the former control of each feed coal accordingly Heat value J_{Control coal k}, obtain J_{Control coal k}'=P_k(Q_{Ad moves}±ΔQ_{Adi moves})；

This data processing controller is by this J_{Control coal k}' it is sent to heat coal-blending device in corresponding feed coal coal blending branch road, respectively Heat coal-blending device presses respective J_{Control coal k}' carry out heat coal blending, reduce difference DELTA Q_{Adi moves}, so that Q_{Adi moves}With specified Q_{Ad moves}It is close, Realize caloric value On-line Control.

The present invention, on the premise of the flow-rate ratio ensureing each feed coal coal blending branch road, can realize the closed loop of heat coal blending simultaneously Control and caloric value closed-loop control, realize pressing heat coal supply.

Fig. 5 gives the power heat Coal Blending System control flow schematic diagram of invention.

This control flow includes heat coal blending closed-loop control and caloric value closed-loop control.

, compared with existing dynamic blending coals system, its distinguishing feature is as follows for power heat Coal Blending System：

1. the control calorie value J of each feed coal_{Control coal}It is by each feed coal flow proportional (P₁, P₂, ┄ P_K) requiring will with user Thermal coal rated thermal amount Q asked_{Ad moves}Determine.Each heat coal-blending device presses respective J_{Control coal}Carry out heat coal blending；

2. set n and m gathered data number it is achieved that carrying out online to power calorific value of coal by caloric value Mathematical Modeling Measurement, obtains Q_{Adi moves}；

3. according to Q_{Ad moves}With Q_{Adi moves}Difference DELTA Q_{Adi moves}, revise the respective feed coal heat controlling value of each heat coal-blending device J_{Control coal k}, obtain J_{Control coal k}', respective heat coal-blending device presses respective J_{Control coal k}' carry out heat coal blending, to reduce Δ Q_{Adi moves}, realize thermal coal Caloric value on-line measurement and control.

From features above, it is not difficult to find out, the present invention more existing dynamic blending coals system has obvious technological progress, and can be fully Using the energy, and high-quality thermal coal can be provided the user, thus also bringing larger economic benefit to user, such as electric power is used Thermal coal can reduce the thermal fluctuation of coal dust, reduces boiler coke, improves the thermal efficiency.

Instantiation given below illustrates.

1) basis is mixed and is joined each feed coal coal property, ature of coal parameter and its excursion and user to power calorific value of coal Require, such as rated thermal amount Q_{Ad moves}For 22.36MJ/Kg, selected Datong District old ditch pit coal, Shanxi land owned by officials pit coal, Luan chaste tree of opening a mine are each accordingly Three coals of village coal (hereinafter referred to as Datong District, Shanxi, Jing Gezhuan) participate in coal blending, K=3；

2) ature of coal of three kinds of feed coals is measured, obtain Q_{Ad Datong District}=25.62MJ/Kg, excursion 3%, Q_{Ad Shanxi}= 26.39MJ/Kg, excursion 5%；Q_{The ad Jing Ge village}=16.99MJ/Kg, excursion 5%；

3) meeting under the premise of user requires, with few with high-quality high price coal, multiplex poor quality cheap coal is principle, determines each former Material coal flow proportional is P_{1 Datong District}=35%, P_{2 Shanxi}=25%, P_{The 3 Jing Ge village}=40% it is desirable to total coal blending flow is 200T/h, then P₁ =70T/h, P₂=50T/h, P₃=80T/h.

4) determine the control calorie value J of each feed coal_{Control coal}：

J_{Kong Mei Datong District}=P₁*Q_{Ad moves}(70t*1000kg/3600 second) * 22.36MJ/Kg=434MJ/ second

J_{Control coal Shanxi}=P₂*Q_{Ad moves}(50t*1000kg/3600 second) * 22.36MJ/Kg=301.5MJ/ second

J_{The Kong Meijingge village}=P₃*Q_{Ad moves}(80t*1000kg/3600 second) * 22.36MJ/Kg=496.9MJ/ second

5) determine the Blending Parameter of heat coal-blending device

The acquisition time Δ t=0.1 second

The coal blending heat regulation control time T1=1 second

Mixed coal time T2=3 minute needed for mixed coal equipment

Power calorific value of coal adjusts the control time T3=10 second

Collection number n=T2/T1=180 second/1 second=180 time are calculated according to above parameter,

M=T3/T1=10 second/1 second=10 time

6) each heat coal-blending device (A₁, A₂, A₃) measure caloric value and the weight of respective feed coal respectively：

Q_{Adi coal Datong District}W_{I coal Datong District}

Q_{Adi coal Shanxi}W_{I coal Shanxi}

Q_{The adi Mei Jingge village}W_{The i Mei Jingge village}

7) each heat coal-blending device A_kCalculate the heat J of each feed coal_{I coal k}, and its control calorie value J with respective_{Control coal k}Difference Value：

J_{I coal Datong District}=Q_{Adi coal Datong District}×W_{I coal Datong District}ΔJ_{I coal Datong District}=J_{Kong Mei Datong District}-J_{I coal Datong District}

J_{I coal Shanxi}=Q_{Adi coal Shanxi}×W_{I coal Shanxi}ΔJ_{I coal Shanxi}=J_{Control coal Shanxi}-J_{I coal Shanxi}

J_{The i Mei Jingge village}=Q_{The adi Mei Jingge village}×W_{The i Mei Jingge village}ΔJ_{The i Mei Jingge village}=J_{The Kong Meijingge village}-J_{The i Mei Jingge village}

8) each heat coal-blending device A_kAccording to respective Δ J_{I coal k}Respective feed coal speed governing conveyer is sent with regulation letter Number, to increase or decrease the weight ± Δ W of each feed coal_{I coal k}, draw：

W’_{I coal Datong District}=W_{I coal Datong District}±ΔW_{I coal Datong District}

W’_{I coal Shanxi}=W_{I coal Shanxi}±ΔW_{I coal Shanxi}

W’_{The i Mei Jingge village}=W_{The i Mei Jingge village}±ΔW_{The i Mei Jingge village}

Thus reducing the Δ J of each feed coal_{I coal k}, reach J_{I coal Datong District}With J_{Kong Mei Datong District}It is close, J_{I coal Shanxi}With J_{Control coal Shanxi}It is close, J_{The i Mei Jingge village}With J_{The Kong Meijingge village}The purpose being close, realizes carrying out coal blending by the heat of each feed coal.

9) data processing controller B is according to from each heat coal-blending device A_kHeat and weight signal calculate respective

And Q is calculated according to following Mathematical Modeling_{Adi moves}.

10) data processing controller calculates the Q of thermal coal_{Adi moves}With Q_{Ad moves}Difference DELTA Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and according to ΔQ_{Adi moves}Revise each heat coal-blending device A_kControl calorie value J_{Control coal k}, obtain J_{Control coal k}’.

J_{Kong Mei Datong District}'=P₁(Q_{Ad moves}±ΔQ_{Adi moves})

J_{Control coal Shanxi}'=P₂(Q_{Ad moves}±ΔQ_{Adi moves})

J_{The Kong Meijingge village}'=P₃(Q_{Ad moves}±ΔQ_{Adi moves})

11) data processing controller B is by respective J_{Control coal k}' it is sent to each heat coal-blending device accordingly, this heat coal blending fills Put by respective J_{Control coal k}' carry out heat coal blending, reduce Δ Q to reach_{Adi moves}, make Q_{Adi moves}With Q_{Ad moves}It is close, realize thermal coal heating The On-line Control of amount.

12) coal property test is carried out to thermal coal.

Claims (10)

1. a kind of power heat Coal Blending System, is used for mixing and joins thermal coal, this system includes：

K feed coal coal blending branch road, K is the natural number more than or equal to 2, and each feed coal coal blending branch road is mixed and joined a kind of feed coal, Each feed coal coal blending branch road includes：Raw material coal bunker, feed coal feed bin discharge hole/raw material coal bunker hopper, feed coal speed governing Conveyer；

Mixed coal conveyer, for conveying the feed coal of this K feed coal coal blending branch road output；

Mixed coal equipment, for various the mixing of feed coal being exported this mixed coal conveyer；

Power coal bunker or stock ground, for storing the thermal coal of this mixed coal equipment output；

It is characterized in that, each this feed coal coal blending branch road also includes a heat coal-blending device, for place feed coal coal blending The feed coal on feed coal speed governing conveyer in branch road carries out caloric value Q_{Adi coal k}With weight W_{I coal k}Measurement, and calculate Δ J_{I coal k}, root According to Δ J_{I coal k}The transporting velocity adjusting this feed coal speed governing conveyer is to increase or to reduce this weight W_{I coal k}, reduce Δ J_{I coal k}, make J_{I coal k} With J_{Control coal k}It is close, realize each feed coal coal blending branch road by heat coal blending；

Wherein, Δ J_{I coal k}=J_{Control coal k}-J_{I coal k}, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

This J_{I coal k}For the heat of the feed coal on the feed coal speed governing conveyer in k-th feed coal coal blending branch road, J_{Control coal k}For kth The control calorie value of the feed coal in individual feed coal coal blending branch road, J_{Control coal k}=P_k×Q_{Ad moves}, Q_{Ad moves}For the rated thermal amount of thermal coal, P_kFlow for the feed coal in k-th feed coal coal blending branch road accounts for the flow proportional of all feed coals.

2. the system as claimed in claim 1 is it is characterised in that this system also includes：Data processing controller, for receiving Heat J from the feed coal of this K feed coal coal blending branch road_{I coal k}With weight W_{I coal k}, and calculate Δ Q_{Adi moves}, according to this Δ Q_{Adi moves}Repair Positive J_{Control coal k}, obtain J_{Control coal k}', by this J_{Control coal k}' be sent to heat coal-blending device in k-th feed coal coal blending branch road so as to according to this by J_{Control coal k}' carry out heat coal blending, to reduce Δ Q_{Adi moves}, make Q_{Ad moves}With Q_{Adi moves}It is close, realize caloric value On-line Control, wherein,

ΔQ_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}

J_{Control coal k}’=P_k(Q_{Ad moves}±ΔQ_{Adi moves})

N and m is the data acquisition number of times of this heat coal-blending device, n>M, this n time collection formerly, gathers rear for this m time,Represent the m secondary data sum in rear collection in k-th feed coal coal blending branch road,Represent k-th feed coal The m data deducting formerly in the n data that in coal blending branch road, heat coal-blending device first gathers is sued for peace again, K_QFor calibration coefficient, J_{Control coal k}' be revised feed coal in k-th feed coal coal blending branch road control calorie value, Q_{Ad moves}For thermal coal rated thermal Amount, Q_{Adi moves}Power calorific value of coal for measurement.

3. system as claimed in claim 2 is it is characterised in that this heat coal-blending device further includes：

Caloric value on-line measurement instrument, for measuring caloric value Q of feed coal_{Adi coal k}；

Weight-measuring device, for measuring weight W of feed coal_{I coal k}；

Data acquisition controller, for receiving Q_{Adi coal k}、W_{I coal k}And J_{Control coal k}', calculate Δ J_{I coal k}',

ΔJ_{I coal k}’=J_{Control coal k}’-J_{I coal k}, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

This data acquisition controller is according to this Δ J_{I coal k}' signal is sent to this feed coal buncher, to increase or decrease this weight W_{I coal k}, reduce Δ J_{I coal k}', reach J_{I coal k}With J_{Control coal k}' be close, realize pressing heat coal blending.

4. system as claimed in claim 3 is it is characterised in that this caloric value on-line measurement instrument is that X-ray caloric value is surveyed online Amount instrument or gamma-rays caloric value on-line measurement instrument；

This weight-measuring device is belted electronic balance or X-ray scale, or gravimetric feeder.

5. system as claimed in claim 2, it is characterised in that also including a caloric value on-line measurement instrument, is arranged on this mixed coal Above conveyer, for the power calorific value of coal Q to the thermal coal that this mixed coal conveyer conveys_{Adi moves}Measure；

This data processing controller calculates Δ Q_{Adi moves}, Δ Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and revise the control calorie value of each feed coal accordingly J_{Control coal k}, obtain J_{Control coal k}’=P_k(Q_{Ad moves}±ΔQ_{Adi moves})；

This data processing controller is by this J_{Control coal k}' it is sent to heat coal-blending device in corresponding feed coal coal blending branch road, each heat is joined Device for coal presses respective J_{Control coal k}' carry out heat coal blending, reduce difference DELTA Q_{Adi moves}, so that Q_{Adi moves}With specified Q_{Ad moves}It is close, realize sending out Heat On-line Control.

6. a kind of power heat blending method is it is characterised in that include：

Step 101, is mixed respectively using K feed coal coal blending branch road and joins conveying K kind feed coal, using each feed coal coal blending branch road In heat coal-blending device measure every kind of feed coal caloric value Q_{Adi coal k}With weight W_{I coal k}；

Step 102, calculates the heat J of feed coal using the heat coal-blending device in each feed coal coal blending branch road_{I coal k}, wherein, J_{I coal k}=Q_{Adi coal k}×W_{I coal k}；

Step 103, calculates Δ J_{I coal k}, Δ J_{I coal k}=J_{Control coal k}-J_{I coal k}, J_{Control coal k}Control for the feed coal in k-th feed coal coal blending branch road Heat value, J_{Control coal k}=P_k×Q_{Ad moves}, Q_{Ad moves}For the rated thermal amount of thermal coal, P_kFor the raw material in k-th feed coal coal blending branch road Coal flow accounts for the flow proportional of all feed coals；

Step 104, according to Δ J_{I coal k}Adjust the transporting velocity of feed coal speed governing conveyer in feed coal coal blending branch road increasing or Reduce this weight W_{I coal k}, reduce Δ J_{I coal k}, make J_{I coal k}With J_{Control coal k}It is close, realize each feed coal by heat coal blending.

7. method as claimed in claim 6 is it is characterised in that also include：

Receive the heat J of the feed coal from this K feed coal coal blending branch road using a data processing controller respectively_{I coal k}And weight Amount W_{I coal k}, and calculate Δ Q_{Adi moves}, according to this Δ Q_{Adi moves}Revise respective J_{Control coal k}, obtain J_{Control coal k}', by this J_{Control coal k}' be sent to k-th former Heat coal-blending device in material coal coal blending branch road, this heat coal-blending device is according to J_{Control coal k}' carry out coal blending, to reduce Δ Q_{Adi moves}, make Q_{Ad moves}With Q_{Adi moves}It is close, realize caloric value On-line Control, wherein,

ΔQ_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}

J_{Control coal k}’=P_k(Q_{Ad moves}±ΔQ_{Adi moves})

N and m is the data acquisition number of times of this heat coal-blending device, n>M, this n time collection formerly, gathers rear for this m time,Represent the m secondary data sum in rear collection in k-th feed coal coal blending branch road,Represent k-th feed coal The n data that in coal blending branch road, heat coal-blending device first gathers deducts m data formerly in this n data and sues for peace, K_QFor Calibration coefficient, J_{Control coal k}' be revised feed coal in k-th feed coal coal blending branch road control calorie value, Q_{Ad moves}For thermal coal Rated thermal amount, Q_{Adi moves}Power calorific value of coal for measurement.

8. it is characterised in that n=T2/T1, m=T3/T1, T1 are adjusted when controlling method as claimed in claim 7 for heat coal blending Between, T2 is the mixed coal time, and T3 adjusts control time for caloric value.

9. method as claimed in claim 7 is it is characterised in that the data acquisition controller of this heat coal-blending device receives Q_{Adi coal k}、W_{I coal k}And J_{Control coal k}', calculate Δ J_{I coal k}',

ΔJ_{I coal k}’=J_{Control coal k}’-J_{I coal k}；

This data acquisition controller is according to this Δ J_{I coal k}' signal is sent to this feed coal buncher, to increase or decrease this weight W_{I coal k}, reduce Δ J_{I coal k}', reach J_{I coal k}With J_{Control coal k}' be close, realize pressing heat coal blending.

10. method as claimed in claim 7 is it is characterised in that also include：

The power calorific value of coal Q of the thermal coal of measurement mixed coal conveyer conveying_{Adi moves}；

This data processing controller calculates Δ Q_{Adi moves}, Δ Q_{Adi moves}=Q_{Ad moves}-Q_{Adi moves}, and revise the control calorie value of each feed coal accordingly J_{Control coal k}, obtain J_{Control coal k}’=P_k(Q_{Ad moves}±ΔQ_{Adi moves})；

This data processing controller is by this J_{Control coal k}' it is sent to heat coal-blending device in corresponding feed coal coal blending branch road, each heat is joined Device for coal presses respective J_{Control coal k}' carry out heat coal blending, reduce difference DELTA Q_{Adi moves}, so that Q_{Adi moves}With specified Q_{Ad moves}It is close, realize sending out Heat On-line Control.