CN205783316U - Boiler Group Ore-controlling Role based on water admixing device - Google Patents

Abstract

Boiler Group Ore-controlling Role based on water admixing device belongs to group control system technical field, particularly relates to a kind of Boiler Group Ore-controlling Role based on water admixing device.This utility model provides a kind of energy-conservation, Boiler Group Ore-controlling Role based on water admixing device that heating effect is good.This utility model includes that multiple boiler branch road, the backwater end of its structural feature each boiler branch road are all connected with water return pipeline, and the water inlet end of water return pipeline is provided with cooling-water temperature sensor T₁With pressure transducer P₁, being all connected with water supply line for water end (W.E.) of each boiler branch road, the water side of water supply line is provided with cooling-water temperature sensor T₂With pressure transducer P₂；Every boiler branch road includes backwater end water-water jet, effusion meter q₁, cooling-water temperature sensor T₃, boiler, cooling-water temperature sensor T₄, for water end (W.E.) water-water jet and cooling-water temperature sensor T₇First water inlet end of backwater end water-water jet is connected with backwater end the second threeway the second end, backwater end the second threeway the first end is the backwater end of boiler branch road, backwater end the second threeway the 3rd end is connected with for water end (W.E.) water-water jet the second water inlet end by regulation valve, and the second water inlet end of backwater end water-water jet is connected with the water side of force (forcing) pump q.

Description

Boiler Group Ore-controlling Role based on water admixing device

Technical field

This utility model belongs to group control system technical field, particularly relates to a kind of boiler of based on water admixing device team control system System.

Background technology

Heat supply is necessary community service and the people's livelihood engineering of north cold area winter service resident orthobiosis.Along with life The raising that running water is flat, people have been unsatisfactory for minimum life temperature guarantee, and require to reach comfortableness and personalized service.Obviously, Heat supply is just had higher requirement by this, i.e. requires to improve heat supply temperature and heating time.Corresponding, the consumption of the energy is also Considerably increase.Simultaneously as the fast development of market of real estate, the double growth of area of heat-supply service.This just energy to China Source consumes and environmental pollution brings unprecedented pressure.Along with global climate extramalization increasingly, reduce greenhouse gas emission and do not allow quarter Slow.Need not only to source revolution among these, in addition it is also necessary to power-saving technology of constantly bringing forth new ideas.

Summary of the invention

This utility model is aiming at the problems referred to above, it is provided that a kind of energy-conservation, pot based on water admixing device that heating effect is good Stove group control system.

For achieving the above object, this utility model adopts the following technical scheme that, this utility model includes multiple boiler branch road, The backwater end of its structural feature each boiler branch road is all connected with water return pipeline, and the water inlet end of water return pipeline is provided with cooling-water temperature sensor T₁With pressure transducer P₁, being all connected with water supply line for water end (W.E.) of each boiler branch road, the water side of water supply line is provided with water temperature Sensor T₂With pressure transducer P₂；Every boiler branch road includes backwater end water-water jet, effusion meter q₁, cooling-water temperature sensor T₃, pot Stove, cooling-water temperature sensor T₄, for water end (W.E.) water-water jet and cooling-water temperature sensor T₇, the first water inlet end of backwater end water-water jet and backwater end the Two threeway the second ends are connected, and backwater end the second threeway the first end is the backwater end of boiler branch road, backwater end the second threeway the 3rd end Being connected with for water end (W.E.) water-water jet the second water inlet end by regulation valve, the second water inlet end of backwater end water-water jet goes out with force (forcing) pump q's Water end (W.E.) is connected；

The water side of backwater end water-water jet and effusion meter q₁Water inlet end be connected, effusion meter q₁The entering of water side and boiler Water end (W.E.) is connected, and the water side of boiler is connected with for water end (W.E.) the first threeway the first end, for water end (W.E.) the first threeway the second end and force (forcing) pump q Water inlet end be connected；It is connected, for water end (W.E.) water-water jet with for water end (W.E.) water-water jet the first water inlet end for water end (W.E.) the first threeway the 3rd end Water side is the confession water end (W.E.) of boiler branch road；

Described cooling-water temperature sensor T₄It is arranged on the pipeline that the water side of boiler is connected with for water end (W.E.) the first threeway the first end, Cooling-water temperature sensor T₃It is arranged on effusion meter q₁The pipeline that is connected with the water inlet end of boiler of water side on, cooling-water temperature sensor T₇Arrange Confession water end (W.E.) at boiler branch road；

Also include user indoor temperature harvester and building hotlist, Temperature sampler and the signal output port of building hotlist and list Unit's router is connected, and unit router is connected with building controller router, building controller router by high in the clouds and boiler room without Line router exchange data, boiler room wireless router controls main frame with boiler room and is connected, and the signal that boiler room controls main frame is defeated Inbound port is connected with the signal output port of the temperature sensor of detection outdoor temperature；The control signal that boiler room controls main frame is defeated Go out port respectively with the control signal input port of described regulation valve, the control signal input port of backwater end water-water jet, confession The control signal input port of water end (W.E.) water-water jet, the control signal input port of force (forcing) pump q are connected；Boiler room controls the inspection of main frame Survey signal input port respectively with cooling-water temperature sensor T₁, pressure transducer P₁, cooling-water temperature sensor T₂With pressure transducer P₂, flow Meter q₁, cooling-water temperature sensor T₃, cooling-water temperature sensor T₄, cooling-water temperature sensor T₇Detection signal output port be connected.

As a kind of preferred version, regulation valve described in the utility model is electric control valve, and force (forcing) pump q is frequency conversion pressurization Pump.

As another kind of preferred version, described in the utility model for water end (W.E.) water-water jet water side with for water end (W.E.) the second threeway the One end is connected, and for the confession water end (W.E.) that water end (W.E.) the second threeway the second end is boiler branch road, returns with flue gas for water end (W.E.) the second threeway the 3rd end Receiving apparatus is connected；

Described backwater end the second threeway the first end is connected with backwater end the first threeway the second end, backwater end the first threeway first End is the backwater end of boiler branch road, and backwater end the first threeway the 3rd end is connected with flue gas recovery device by effusion meter q2；

It is provided with cooling-water temperature sensor T on the pipeline that water end (W.E.) the second threeway the 3rd end is connected with flue gas recovery device₆；Supply water It is provided with cooling-water temperature sensor T on the pipeline that end water-water jet water side is connected with for water end (W.E.) the second threeway the first end₅；Effusion meter q2, Cooling-water temperature sensor T₆, cooling-water temperature sensor T₅Detection signal output port and boiler room control the detection signal input port of main frame It is connected.

As another kind of preferred version, boiler branch road described in the utility model is three.

Secondly, bypass valve door Q it is provided with between water return pipeline described in the utility model and water supply line_N+1；Bypass is adjusted Joint valve Q_N+1The control signal output port that control signal input port controls main frame with boiler room is connected.

It addition, the building heat supply pipeline of user described in the utility model is provided with balanced valve.

This utility model beneficial effect.

The utility model proposes the heating system automatic optimal control technology of a kind of multiple stage boiler composition, based on weather compensation Power-saving technology, under the conditions of meeting system heat demand, uses optimal working boiler to combine, and makes each working boiler lead to The regulation of overmulling water is in optimal running parameter, thus reaches the maximization of energy saving of system.

This utility model obtains outdoor meteorologic parameter by outdoor temperature sensor and is controlled system water supply, utilizes Boiler feed water temperature, flow are controlled by water-water jet, the equipment of force (forcing) pump, reach on the basis of ensureing normal heating demands Save the purpose of the energy.

This utility model provides the hardware foundation of a kind of Boiler Group Ore-controlling Role based on water admixing device.

Accompanying drawing explanation

With detailed description of the invention, this utility model is described further below in conjunction with the accompanying drawings.This utility model protection domain It is not only limited to the statement of herein below.

Fig. 1 is this utility model system construction drawing.

Fig. 2 is this utility model theory diagram.

Fig. 3 is that this utility model implements illustration.

Detailed description of the invention

One, system is constituted

One) steam generator system is constituted

1, parameter and symbol description

T₁: system return temperature, T₂: system water supply temperature, T₃: boiler blow-down water temperature, T₄: boiler leaving water temperature, T₅: mixed water The water temperature of point 5, T₆: off-gas recovery water temperature, T₇: the water temperature of mixed water spot 7, T_l: furnace temperature, T_y: cigarette temperature, t_w: outdoor temperature, t_n: indoor Temperature, C: specific heat of water holds, and q: boiler mixes discharge, q₁: boiler blow-down water flow, q₂: flue gas recovery device hot water flow, Q₁: mixed Water spot 7 hot water flow, Q_N+1: system bypass pipe flow, P₁: system return pressure, P₂: systematic Water supply pressure, t_wL: outdoor minimum Temperature, T_gL: the supply water temperature that minimum outdoor temperature is corresponding, T_g0: supply water temperature when outdoor 0 DEG C,Effusion meter, Water-water jet,Cooling-water temperature sensor,Electric control valve,Pressure transducer,Threeway, n: working boiler number of units, N: System boiler number of units, η: system loading.

2, steam generator system hardware is constituted

As in figure 2 it is shown, heating system is made up of N platform boiler.System return pipeline installs additional cooling-water temperature sensor T₁, pressure Sensor P₁.System water supply pipeline installs additional cooling-water temperature sensor T₂, pressure transducer P₂.Attaching system by-pass line and electronic Control valve.The return pipe of every boiler installs additional cooling-water temperature sensor T₃, effusion meter q₁, at feed pipe, install cooling-water temperature sensor additional T₄.At feed pipe cooling-water temperature sensor T₄Outside installs threeway 1, return pipe effusion meter q additional₁Outside installs water-water jet 1 additional, pressurizes with frequency conversion Pump q couples threeway 1 and water-water jet 1, constitutes boiler first and mixes water bypass.Outside feed pipe threeway 1, install water-water jet 2 additional, returning Install threeway 2 outside water pipe water-water jet 1 additional, couple threeway 2 and water-water jet 2 with electric control valve, constitute boiler second and mix water bypass. Cooling-water temperature sensor T is installed additional outside water-water jet 2₅, T₅Outside installs threeway 3 additional；Outside backwater threeway 2, install threeway 4 additional, use flue gas Retracting device (belongs to heat-exchanger rig, recommends to use finned tube waste heat condensation withdrawer, as Beijing energy-saving equipment has to gas fired-boiler The product of limit company, model is YFHSQ-X, fractional energy savings 5%-8%.), effusion meter q₂, cooling-water temperature sensor T₆Couple threeway 3 and three Logical 4, constitute boiler the 3rd bypass.Cooling-water temperature sensor T is installed additional outside threeway 3₇。

Two) control system is constituted

As it is shown in figure 1, control system is by user's temperature acquisition system, pipe network balance monitoring system, boiler room automatically controls System and communication network system composition.Cloud server is a big data sharing platform, and it can manage multiple boiler room Heating system.

User's temperature acquisition system is formed by inserting the Temperature sampler at each family, building hotlist and unit wireless router, it Connected by RS485 bus, unit wireless router is aggregated into building controller router, is subsequently sent to high in the clouds.High in the clouds connects Receive the information such as the temperature for thermal region each residential building user and building heat, flow, re-send to boiler room automatic control system. Install hotlist and balanced valve on building heat supply pipeline additional, be used for adjusting pipe network balance and heating load.

Boiler room control system completes to work as follows:

1, communication work.It is obtained user profile by wireless router from cloud server, then is inputted by RS485 bus Control main frame.

2, data processing work.Control main frame a large number of users temperature information received is processed, calculate active user Room temperature meansigma methods.

3, carry calculation work.Outdoor temperature according to the user's average room temperature calculated and Real-time Collection calculates system thermal and bears Lotus.

4, weather compensation curve sets up work.

Open up special heating parameter data base, outdoor temperature, supply water temperature, return water temperature and the user during record heat supply The information such as average room temperature.Wherein user's average room temperature need to be sent to after being gathered each user's temperature by cloud database and be averaged Boiler room controls main frame；Set up different outdoor temperature, the corresponding table of different chamber's gentleness supply and return water temperature, and as heating history number According to being stored in internal memory.The sampling period of above-mentioned parameter is one hour.Next data need to be arranged by computer, it is contemplated that The hysteresis quality of heating system, need to extract outdoor temperature within continuous time, (be not less than hot water used in system cycle period) change be less than Parameter corresponding to time period of 2 degree, as valid data, is stored in weather compensation curve tables, through one period of long period progressively Form all standing of a heating system difference outdoor temperature, tentatively complete the self-built of this system weather compensation curve.In heat supply During, if multi collect is to valid data group, then need to be averaged with the data set of identical outdoor temperature, constantly to table Middle parameter is revised automatically.

5, working boiler configuration work.

6, boiler water supply temperature control work.

7, boiler mixes water management and optimizing work.

8, pipe network balance and hotlist monitoring.

Two, the control work process of each hardware of accompanying drawings this utility model

One) heating demand is determined

1, heating demand can be determined according to outdoor temperature

$\mathrm{\η}=\frac{t_n-t_w}{t_n-t_{wL}}---\left(1\right)$

Require to determine working boiler number of units according to system loading.

2, determine that outdoor temperature is t according to weather compensation data base or weather compensation curve_wTime system water supply temperature T₂, Return water temperature T₁。

Before weather compensation data base improves, it is also possible to go out confession, backwater according to success experience value with following formula to calculating Temperature:

$T_2=\frac{T_{gL}-T_{g0}}{t_{wL}}\×t_w+T_{g0}---\left(2\right)$

T₁=T₂-Δt(3)

Δ t=η × Δ t_max(4)

Wherein Δ t_maxFor supply backwater temperature difference at full capacity.

Two) working boiler bye-pass mixes water regulation process

1. opening selected working boiler, first close all boilers and mix water regulating valve, mixed water force (forcing) pump and system bypass are adjusted Joint valve.Evaluation work boiler bye-pass is the water temperature T of point for measuring temperature 7 before mixed water regulates₇.T is calculated by following equation of heat balance₇: (see Fig. 2)

$Q_{N+1}\×T_1+\underset{i=1}{\overset{n}{\Σ}}{Q}_i\×T_7+\underset{i=n+1}{\overset{N}{\Σ}}{Q}_i\×T_1=(Q_{N+1}+\underset{i=1}{\overset{n}{\Σ}}{Q}_i+\underset{i=n+1}{\overset{N}{\Σ}}{Q}_i)\×T_2---\left(5\right)$

Wherein N is boiler number of units, and n is working boiler number of units, Q_N+1For system bypass flow.In the case of Smaller load, generally Need open system bypass valve door.Its flow Q_N+1Can be calculated by following formula:

$Q_{N+1}=\mathrm{\μ}\×A\×\sqrt{\frac{2(P_2-P_1)}{\mathrm{\ρ}}}---\left(6\right)$

Wherein, (needing field calibration, concrete calibration process is as follows: installs external clamping at bypass duct and surpasses for μ: discharge coefficient Acoustic wave flow meter, make when steam generator system runs Linear regulating valve open 25%, after a period of stabilisation recording flowmeter flow, The parameters such as P1, P2, water temperature, and calculated flow rate coefficient；Choose the parameters such as regulation valve unlatching 50%, 75%, 100% the most successively to repeat Said process, by the discharge coefficient that calculated averagely.)

A: linear valve aperture, ρ: fluid media (medium) density.

The water temperature T of water supply line before off-gas recovery need to be calculated further₅。

If the efficiency of off-gas recovery is η_y, then may be used to lower equation of heat balance and calculate T₅:

C×Q₁×(T₇-T₁)=(1+ η_y)×C×q₁×(T₅-T₁) (7)

Owing to boiler mixes the front T of water regulation₄=T₅, so boiler water supply temperature reaches T before mixed water₅, system loading can be met Requirement.

2. mix water management

T₄After up to standard, can boiler metered flow keep constant on the premise of, synchronize to open and strengthen mixed water regulating valve and Force (forcing) pump.q₁Reduce, then strengthen force (forcing) pump frequency, q₁Increase, then strengthen control valve opening, until boiler water supply temperature reaches me Predetermined value.During mixed water regulates, boiler water outlet and return water temperature will improve simultaneously.Ensureing T₇Constant premise Under, T₄It is typically chosen between 90-95 DEG C.

Can first seek T₆, following equation of heat balance try to achieve:

C×Q₁×(T₇-T₁)×η_y=C × q₂×(T₆-T₁)(8)η_yRepresent the efficiency of recuperation of heat

Seek the T after mixed water again₅, following equation of heat balance try to achieve:

Q₁×T₇=q₂×T₆+q₁×T ₅(9)

Mixed discharge q is tried to achieve by following equation of heat balance:

q₁×T₅=q × T₁+(q₁-q)×T₄ (10)

Boiler blow-down water temperature T is sought with following equation of heat balance₃:

q₁×T₃=q × T₄+(Q₁-q-q₂)×T₁ (11)

Embodiment

As it is shown on figure 3, certain heating system is made up of the boiler that bench-types No. 3 are identical, two works one are standby.Boiler metered flow is 180T/h.Assume the efficiency eta of recuperation of heat_y=6%, flow is q₂=40T/h.

Weather compensation data base's canonical parameter: winter outdoor minimum temperature t_wL=-30 DEG C, correspondence system supply water temperature T_gL =55 DEG C；Supply backwater temperature difference Δ t_max=12 DEG C.When outdoor temperature is 0 DEG C, corresponding supply water temperature T₂=38 DEG C, indoor temperature t_n= 22 DEG C, then now system return temperature T₁Try to achieve with following formula:

System loading

Supply backwater temperature difference Δ t=η × Δ t when 0 DEG C_max=42.3% × 12=5 DEG C

System return temperature T₁=T₂-Δ t=38-5=33 DEG C

Determining to use a working boiler according to heating demand, the load that boiler undertakes is 2 × η=2 × 42.3% =84.6%；

Removing off-gas recovery efficiency, the load of boiler is (100%-6%) × 84.6%=80%.

Boiler is asked to mix supply water temperature T before water₄

1) first T is sought according to equation of heat balance (5)₇

Open system bypass regulator valve, this bypass flow can be made to reach Q₁=180+40=220T/h.

Given data is substituted into equation (5):

220 × (53-33)=1.06 × 180 × (T₅-33)

T₅=56 DEG C

T before mixed water₄=T₅=56 DEG C；

Before i.e. boiler mixes water regulation, boiler need to be gone out water management at 56 DEG C.

Mixed water management: according to boiler load situation 80%, the mixed water management of this boiler sets leaving water temperature T₄=90 DEG C.

Can follow these steps to carry out mixed water calculate:

Seek T₆:C×Q₁×(T₇-T₁)×η_y=C × q₂×(T₆-T₁)

220 × (53-33) × 0.06=40 × (T₆-33)

T₆=39.6 DEG C

Seek T₅:Q₁×T₇=q₂×T₆+q₁×T₅

220 × 53=40 × 39.6+180 × T₅

T₅=56 DEG C

By T₅The mixed water equation in place seeks q:q₁×T₅=q × T₁+(q₁-q)×T₄

180 × 56=q × 33+ (180-q) × 90

10080=33q+16200-90q

57q=6120

Q=107T/h

By T₃The mixed water equation in place seeks T₃: q₁×T₃=q × T₄+(Q₁-q₂-q)×T₁

180×T₃=107 × 90+73 × 33

Above-mentioned control process is control based on this utility model hardware, and this utility model protection main body is boiler team control system The hardware connection structure of system, the formula related to during control is prior art.

It is understood that above with respect to specific descriptions of the present utility model, be merely to illustrate this utility model and not It is limited to the technical scheme described by this utility model embodiment, it will be understood by those within the art that, the most permissible This utility model is modified or equivalent, to reach identical technique effect；Needs are used, all in this reality as long as meeting Within novel protection domain.

Claims (6)

1. Boiler Group Ore-controlling Role based on water admixing device, including multiple boiler branch roads, it is characterised in that the backwater of each boiler branch road End is all connected with water return pipeline, and the water inlet end of water return pipeline is provided with cooling-water temperature sensor T₁With pressure transducer P₁, each boiler branch road Be all connected with water supply line for water end (W.E.), the water side of water supply line is provided with cooling-water temperature sensor T₂With pressure transducer P₂；Every Boiler branch road includes backwater end water-water jet, effusion meter q₁, cooling-water temperature sensor T₃, boiler, cooling-water temperature sensor T₄, for water end (W.E.) water-water jet With cooling-water temperature sensor T₇, the first water inlet end of backwater end water-water jet is connected with backwater end the second threeway the second end, backwater end second Threeway the first end is the backwater end of boiler branch road, and backwater end the second threeway the 3rd end is by regulation valve and for water end (W.E.) water-water jet second Water inlet end is connected, and the second water inlet end of backwater end water-water jet is connected with the water side of force (forcing) pump q；

The water side of backwater end water-water jet and effusion meter q₁Water inlet end be connected, effusion meter q₁The water inlet end of water side and boiler Being connected, the water side of boiler is connected with for water end (W.E.) the first threeway the first end, for entering of water end (W.E.) the first threeway the second end and force (forcing) pump q Water end (W.E.) is connected；It is connected, for the water outlet of water end (W.E.) water-water jet with for water end (W.E.) water-water jet the first water inlet end for water end (W.E.) the first threeway the 3rd end What end was boiler branch road supplies water end (W.E.)；

Described cooling-water temperature sensor T₄It is arranged on the pipeline that the water side of boiler is connected with for water end (W.E.) the first threeway the first end, water temperature Sensor T₃It is arranged on effusion meter q₁The pipeline that is connected with the water inlet end of boiler of water side on, cooling-water temperature sensor T₇It is arranged on pot The confession water end (W.E.) of stove branch road；

Also include user indoor temperature harvester and building hotlist, the signal output port of Temperature sampler and building hotlist and unit road Being connected by device, unit router is connected with building controller router, and building controller router passes through high in the clouds with boiler room without circuit Being exchanged data by device, boiler room wireless router controls main frame with boiler room and is connected, and boiler room controls the signal input part of main frame Mouth is connected with the signal output port of the temperature sensor of detection outdoor temperature；Boiler room controls the control signal outfan of main frame Mouth respectively with the control signal input port of described regulation valve, the control signal input port of backwater end water-water jet, for water end (W.E.) The control signal input port of water-water jet, the control signal input port of force (forcing) pump q are connected；Boiler room controls the detection letter of main frame Number input port respectively with cooling-water temperature sensor T₁, pressure transducer P₁, cooling-water temperature sensor T₂With pressure transducer P₂, effusion meter q₁、 Cooling-water temperature sensor T₃, cooling-water temperature sensor T₄, cooling-water temperature sensor T₇Detection signal output port be connected.

Boiler Group Ore-controlling Role based on water admixing device the most according to claim 1, it is characterised in that described regulation valve is electronic Regulation valve, force (forcing) pump q is frequency conversion force (forcing) pump.

Boiler Group Ore-controlling Role based on water admixing device the most according to claim 1, it is characterised in that described for water end (W.E.) water-water jet Water side is connected with for water end (W.E.) the second threeway the first end, for the water end (W.E.) that supplies that water end (W.E.) the second threeway the second end is boiler branch road, water supply The second threeway the 3rd end is held to be connected with flue gas recovery device；

Described backwater end the second threeway the first end is connected with backwater end the first threeway the second end, and backwater end the first threeway the first end is The backwater end of boiler branch road, backwater end the first threeway the 3rd end is connected with flue gas recovery device by effusion meter q2；

It is provided with cooling-water temperature sensor T on the pipeline that water end (W.E.) the second threeway the 3rd end is connected with flue gas recovery device₆；Mix for water end (W.E.) It is provided with cooling-water temperature sensor T on the pipeline that hydrophone water side is connected with for water end (W.E.) the second threeway the first end₅；Effusion meter q2, water temperature Sensor T₆, cooling-water temperature sensor T₅Detection signal output port and boiler room control the detection signal input port of main frame and be connected.

Boiler Group Ore-controlling Role based on water admixing device the most according to claim 1, it is characterised in that described boiler branch road is three Bar.

Boiler Group Ore-controlling Role based on water admixing device the most according to claim 1, it is characterised in that described water return pipeline and confession Bypass valve door Q it is provided with between waterpipe_N+1；Bypass valve door Q_N+1Control signal input port and boiler room control main The control signal output port of machine is connected.

Boiler Group Ore-controlling Role based on water admixing device the most according to claim 1, it is characterised in that the building heat supply of described user Pipeline is provided with balanced valve.