CN101198824B

CN101198824B - Heating plant with radiant tubes

Info

Publication number: CN101198824B
Application number: CN2006800219277A
Authority: CN
Inventors: O·帕拉罗
Original assignee: Ronflette SA
Current assignee: Ronflette SA
Priority date: 2005-05-11
Filing date: 2006-05-11
Publication date: 2010-08-11
Anticipated expiration: 2026-05-11
Also published as: ITPD20050133A1; CN101198824A; WO2006120717A1; EP1880143A1

Abstract

A heating plant with radiant tubes comprising a burner of a gas - coitiburent air mixture suitable for generating high temperature combustion products which are introduced in a closed circuit with radiant tubes where they heat a carrier fluid circulated in depression by the action of a fan arranged upstream of the burner. There are provided regulation means comprising an regulation valve of the gas rate, whose modulation is directly controlled by at least one pressure value, detected into the combustion chamber, which at the same time determines the forced suction of the comburent air rate.

Description

The firing equipment of band radiant tube

Technical field

The present invention relates to a kind of firing equipment with radiant tube.

More particularly, this equipment can be used for the district heating to any kind expediently, as living and buildings such as industrial building, especially warehouse, factory, theater, cinema, supermarket, greenhouse, swimming pool.

Background technology

This equipment is provided with burner, is used for producing high-temperature combustion product, and this high-temperature combustion product is called as flue gas hereinafter.Flue gas circulates in a loop.The loop is by constituting by the radiant tube of radiation to the above-mentioned zone heating.

Because shape and modularity, radiant tube also is called radiation zone according to the technical term of this area.Radiant tube for example is made of the annealing or the steel pipe of aluminising, is arranged in the building ceiling that will the heat place of any slightly down, preferably utilizes heat radiation in infrared to following people or thing radiant heat.

The burner that uses on the equipment of this known type is provided with the combustion chamber by traditional approach, in the combustion chamber, the ignition mixture that is made of primary air and combustion gas is in the torch head internal combustion, generate the carrying object of flue gas, this carrying object under the effect of the fan that is arranged in the burner upstream and moves in the suction mode and the circulating flue gas that had before produced in radiant tube, circulate together.

Old colder flue gas is by the new flue gas that waits stream (equicurrent) mode to add to come out from burner, is under the effect of fan of low pressure in the whole loop of maintenance then, all circulates.

Gou Zao equipment is safe especially because burner is placed on the building outside that will heat usually like this, and radiant tube is in low-pressure state, therefore, prevents that flue gas is diffused into any possibility in the environment that will heat.

In practice, fan circulates the carrying object of certain flow in radiant tube.Carrying object part is made of new, the very hot burning gases that produce in the burner, and part is made of old, the colder burning gases that transmitted a part of heat to radiant tube in cyclic process.

For the relevant quality of balance, the cold circulating flue gas of a part is discharged to the building outside through special chimney.

So fan is responsible for the low pressure recycle and the part of smoke of carrying object simultaneously and is discharged through the pressure of chimney.

Burner obtains by the flow that change is incorporated into the volume of air/gas mixture in the burner self usually to the adjusting of thermal power.

The known burner of so-called Puffer type is used air blast, and air blast is regulated the air intake of burner, the aperture of correspondingly regulating fuel release valve.

Force the effect of the low pressure that the induction type burner determines by near the downstream, combustion chamber that is positioned in the radiant tube loop combustion product exit position, the inspiration combustion air.In fact, near the exhanst gas outlet position, the loop is presented as a kind of narrowing down, and causes low pressure in the carrying object that is promoted by fan.

These burners imagination usually use a door in suction place of combustion air.This is regulated inlet air flow rate and changes between a plurality of fixing positions.Solenoid valve group by microprocessor control allows gas quantity is regulated and control, and is constant and best with the ratio that keeps itself and air.

European patent EP 647819 discloses a kind of equipment, and this equipment is provided with a kind of atmospheric pressure burner, and this burner imagination air pumping unit is because the low pressure that fan causes partly is because combustion gas is expelled to the negative pressure that special Venturi tube produces.

Certainly, the new combustion gas flow that is produced, and the therefore amount of combustion air-fuel gas mixture must be in the exhaust gas volumns that equals qualitatively to be discharged by chimney.

For this reason, can establish one or more adjustment doors, adjustment doors for example is arranged on the suction channel of primary air, i.e. the upstream of flue gas chimney is used for separating between part that the carrying object flow is circulated in the loop and the discharge section.

At present, according to hitherto known technology, when near setpoint conditions (roughly when realizing the ambient temperature of setting),, reduce the thermal power of burner usually by regulation and control air/fuel gas buring mixture amount.

Just operation, the purpose that carrying object flows be, along the exchange surface that radiant tube is whole the thermal power that burner produces distributed, and its objective is that therefore to guarantee heat flow even as far as possible in the zone of this device service.

Just theoretically, from integral device efficient, in order to ensure the optimal allocation of thermal power with respect to the power of the carrying object that is used for circulating, the volume flow of carrying object should change along with the thermal power of supplying with, be that fluid flow increases along with the increase of the thermal power that provides, reduce along with reducing of thermal power.

On the other hand, in fact, known equipment is not expected the possibility that the volume flow of carrying object is provided along with the change of the thermal power that is provided.It is constant substantially that in fact the volume flow of carrying object keeps under the service condition that is hopeful.It is constant that this has become fan speed, and be that fan is constant substantially to the absorption of electrical power under all service conditions therefore.

This whole efficiency to known device has caused adverse effect.Therefore fan speed reaches, and the carrying object flow is set at the thermal power maximum that burner can provide usually.So when thermal power must be lower than maximum desired value, the flow of the carrying object of circulation also was identical, fan has absorbed idle work.

And the thermal power of burner and the electrical power of fan often are based on that design condition selects, and consider to want the concrete condition of installed device.Particularly, the electrical power of fan is also based on selecting at the thinkable load loss in radiant tube loop.

In practice, as known, usually occur in and do not see design condition in the installation process fully.For example, have necessary loop, and this has determined load loss that do not expect, unexpected by introducing bend pipe or difference in height change pipe.

Known device does not allow the carrying object flow to compensate in the design condition of conventional equipment discovery in service and the difference of practical operation condition.Especially, can not use fan by general mode, the result, present equipment often can not be with ideal conditions and maximal efficiency work.

Summary of the invention

So, the objective of the invention is to avoid the shortcoming of known arrangement.

Specific purposes of the present invention provide a kind of equipment, and this equipment should be regulated by the general method of operation easily according to the actual motion condition, when especially in a single day having installed the radiation of equipment pipe.

Further purpose of the present invention provides that a kind of construction is got up simply and reliable device on the whole.

According to an aspect of the present invention, a kind of firing equipment with radiant tube is provided, comprise: burner, it is provided with the combustion chamber and is used for making the ignition mixture burning to produce high-temperature combustion product, and described ignition mixture obtains with at least a combustion air flow and at least a gas flow; The closed-loop path, it is provided with and is used for coming by radiation the radiant tube of heat rooms, and carrying object can be transmitted in described closed-loop path, and described carrying object is heated by described combustion product is introduced in the described closed-loop path; At least one fan, the upstream that it is arranged in described burner is used to make described carrying object under low pressure to circulate and enters described closed-loop path; Adjusting device is used to regulate the flow of described ignition mixture, to change the thermal power that described burner is produced; Described adjusting device comprises at least one control valve of described gas flow, the aperture of described control valve directly is subjected to the control of at least one force value in regulation and control, described force value is detected and be lower than atmospheric pressure in described combustion chamber, and described force value has determined to be forced to suck the described combustion air flow of described burner.

According to a further aspect in the invention, the method of the thermal power that a kind of firing equipment that is used for the accommodation zone radiant tube supplies with is provided, described equipment is intended being used at least one room is heated and comprises: suck air burner, it is supplied with combustion air flow and gas flow, is used for producing high-temperature combustion product in the combustion chamber; Can circulate and enter in the described closed-loop path in the closed-loop path of radiant tube, described combustion product, described closed-loop path limits a carrying object flow; This method comprises following operating procedure: detect the step of the inside, the combustion chamber pressure of described burner, described pressure is lower than atmospheric pressure and depends on the value of described carrying object flow; Regulate the step of described gas flow based on described pressure; Regulate the step of carrying object flow, be used to change described pressure, and then change described gas flow, and therefore change described thermal power.

According to a further aspect in the invention, provide a kind of mounting process of firing equipment of above-mentioned band radiant tube, this technology comprises: the step of the described equipment of equipment in the building that will heat; Set the step of its maximum useful flow for the carrying object in the closed-loop path of mounted described equipment, the useful flow of described maximum has determined the corresponding maximum stream flow of the combustion air of minimum pressure in the described combustion chamber and suction; Gas flow is calibrated to the step of maximum stream flow, and the maximum stream flow of described gas flow has predetermined ratio with respect to the maximum stream flow of described combustion air, gas flow is calibrated to maximum stream flow has determined calibration to described burner maximum heat power; By means of regulate described carrying object flow and thereby regulate pressure in the described combustion chamber, utilization is lower than or equals the carrying object flow of the useful flow of described maximum, be controlled at the step of the thermal power that is produced by described burner in the running, the pressure in the described combustion chamber is responsible for by described control valve decision gas flow and by forcing suction decision combustion air flow.

Description of drawings

According to the present invention of above-mentioned purpose, its technical characterictic can find clearly in the claims that advantage of the present invention more clearly manifests from detailed description with reference to the accompanying drawings.These accompanying drawings are represented be purely the present invention give an example character, non-restrictive example.Wherein:

Fig. 1 schematically shows the vertical view of firing equipment of the band radiant tube of target of the present invention, wherein, has removed some parts so that other parts to be shown better;

Fig. 2 has schematically shown the sectional view of Fig. 1 equipment, wherein, has removed some parts so that other parts to be shown better;

Fig. 3 has schematically shown the perspective view of the theme device specifics relevant with burner, wherein, has removed some parts so that other parts to be shown better;

Shown in Fig. 4 a is service chart according to the equipment of first embodiment of the invention;

Shown in Fig. 4 b is service chart according to the equipment of second embodiment of the invention;

Shown in Fig. 4 c is service chart according to the equipment of third embodiment of the invention;

Shown in Fig. 5 is service chart according to the equipment of fourth embodiment of the invention.

The specific embodiment

With reference to accompanying drawing, Reference numeral 1 is represented the firing equipment according to band radiant tube 2 of the present invention on the whole.

Equipment 1 comprises the closed-loop path, and this loop is made of as traditional mode according to this one or more radiant tube 2, and with annealing or the steel of aluminising is made.This loop is connected to Reference numeral 3 summarizes burner 3 and the fan of representing 7.With respect to the direction that the combustion product circulation enters this loop, fan 7 is arranged in the upstream of burner 3.

Burner 3 be this as known type, preferably utilize to force the type of suction, comprise combustion chamber 4.In combustion chamber 4, by torch head 4 ', the mixture that is made of combustion air flow A (perhaps primary air) and fuel gas flow G burns.

As especially in Fig. 1,2, seeing, high-temperature combustion product is introduced in the above-mentioned loop, in this loop, these products under the effect of said fans 7 and previous flue gas that produce and that in cyclic process, transmitted a part of heat to radiant tube 2 circulate together.

For the related quality of balance, the cold circulating flue gas of a part is discharged to the outside of building through being arranged in special-purpose chimney 13 between fan 7 and the combustion chamber 4.

Below for simplicity, in the mixture-accompanying drawing of hot flue gas and cold flue gas with arrow 5 represent-will be defined as carrying object.The carrying object flow of being discharged by chimney 13 is in the accompanying drawings with Reference numeral 5 ' represent, and the circulating flue gas flow " is represented with Reference numeral 5.

Therefore, the closed-loop path defines the circulation of carrying object 5 in the zone that will heat.Carrying object 5 is heated owing to mixing with combustion product, and then can promote the temperature of radiant tube 2.Radiant tube 2 extends in the zone that will heat, therefore utilizes the heat emission in especially infrared, heats by radiation.

Pipe 2 is usually with the stent support of the building below that will heat, and transports branch 2 ' and return branch 2 and " constitute by at least one.Preferably, pipe 2 covers with adiabatic parabola in top region, and this parabola passes radiation downwards.

As has been said, the circulation of carrying object 5 realizes by fan 7.The fan 7 that is arranged on burner 3 upstreams is owing to the shape in loop makes carrying object 5 under low pressure flow to closed-loop path itself.

Therefore, on function, the responsible simultaneously carrying object low pressure recycle of fan enters the loop and the flue gas part is discharged through stack pressure.

In more detail, the existence of low pressure in the loop-be responsible in combustion air and the combustion gas suction combustion chamber 4-by near the formation that narrows down of the loop combustion product entry position itself.

Especially as seeing among Fig. 1, be introduced in the loop by the shaping after-combustion pipeline 40 that is arranged in fan 7 downstreams and discharges chimney 13 downstreams from the high-temperature flue gas of combustion chamber 4.

More particularly, pipeline 40 puts in the part pipe 2 of loop coaxially.The existence of this pipeline has reduced recirculation carrying object 5, and " therefore the available cross section of flowing has determined the loop to narrow down." therefore experience is laminar flow to the carrying object 5 that is advanced by fan, has determined the low pressure in the smoke inlet district that represents with alphabetical H among Fig. 1.Low-pressure area H extends to whole shaped pipe 40, until combustion chamber 4.

In the following description, statement " pressure in the combustion chamber " meaning is the actual pressure that not only refers in the combustion chamber, and near the pressure condition at place, hot smoke inlet district referring to generally and that enter the loop.

In equipment 1 according to the present invention, there be being used for of further expecting to regulate the device of the flow of air/combustion gas (comburant) mixture, be suitable for changing the thermal power that burner 3 produces on every side based on the heat that requires.This device will elaborate hereinafter.

According to based on thought of the present invention, the device of above-mentioned adjusting volume of air/gas mixture flow comprises the control valve 8 of gas flow G.The adjusting of this valve is directly controlled by the pressure valve that has in the combustion chamber 4, and is responsible for combustion air flow A and gas flow G are sucked in the combustion chamber 4.

Term " pressure " refers to absolute pressure since the pressure in the combustion chamber 4 must be-as already explained-swabbing effect that causes produces because fan 7 and loop, place, hot smoke inlet district narrow down low voltage value or subatmospheric value.

According to preferred embodiment shown in Fig. 4 a, 4b, the 4c, the control valve of gas flow G 8 is made of pneumatic operated valve, and is provided with the shutter 9 that is connected to combustion chamber 4 by pipeline 10.

When the pressure in the combustion chamber 4 changes, shutter 9 motion, thereby open or shut off valve 8, and therefore decision in that there is bigger or littler gas flow G 4 porch to the combustion chamber.

In more detail, when the pressure in the combustion chamber 4 descended, shutter trended towards opening valve 8, therefore increased the inlet gas flow; And when pressure increased, shutter trended towards valve-off 8, therefore reduced the inlet gas flow.

Preferably, as seeing among Fig. 2, the 4a～4c, valve 8 is provided with the bypass 20 that can set, is arranged on the pipeline 10, is used for the pressure on the shutter 9 is set at the value that is different from actual pressure value in the burner 4.

Advantageously, the setting of valve 8 can also be by for example realizing on the returning spring with the screw 20 that schematically shows among Fig. 2,4 ' act directly on shutter 9.

According to of the present invention a kind of alternative shown in Figure 5, the control valve of gas flow G 8 is made of solenoid valve.The force value that this valve base exists in combustion chamber 4 is by control module 15 controls.Force value is with being arranged in the combustion chamber 4 or neighbouring one or 100 detections of more pressure detector.

On function, in aforementioned device 1, the variation correspondence of carrying object flow the respective change of force value in the burner 4.

In more detail, the increase of carrying object 5 flows has determined the pressure drop in the combustion chamber (perhaps bigger low pressure), has therefore determined porch gas flow G increase and combustion air A flow to increase by relation of constant.So the thermal power that has taken place to be supplied with increases.

On the other hand, the reducing of carrying object 5 flows determined that pressure increases (perhaps littler low pressure) in the combustion chamber, and inlet gas flow G descends, and therefore, the thermal power of being supplied with has also descended.

According to first embodiment of Fig. 4 a apparatus shown, the adjusting device of ignition mixture flow comprises the current transformer 11 related with fan 7.Current transformer 11 allows to change the revolution of fan, and therefore changes the volume flow of carrying object 5.In this way, can change the pressure in the combustion chamber 4, and therefore change the thermal power that burner 3 is provided.

As the substitute mode of current transformer 11, the motor of fan can be controlled for example brushless or direct current generator with other execution utensil.

Increase flow by the revolution that increases fan, otherwise perhaps, reduce flow by the revolution that reduces fan.For example, current transformer 11 can be imagined the electric machine frequency that changes fan 7, is included between 30 to 60 hertz.

According to second, third embodiment of Fig. 4 b, 4c difference apparatus shown, the adjusting device of combustion air flow comprises the adjustable gate 12,120 that is arranged in the carrying object closed circuit.Under these circumstances, the flow of ignition mixture and therefore the thermal power supplied with of burner regulated by the aperture that changes adjustable gate 12,120.With regard to operation, in fact, by keeping the fan revolution constant, the volume flow of carrying object 5 and therefore the pressure in the combustion chamber 4 regulated.

More particularly, according to second embodiment shown in Fig. 4 b, door-represent-be arranged in expediently with the Reference numeral 12 in this example bottom of flue gas discharge chimney 13.Door 12 be used for towards the delivery flow 5 of chimney 13 and air-combustion gas mixing logistics capacity of equaling qualitatively to enter ' and deliver to recirculating mass 5 in the closed-loop path of burner 3 " between cut apart the flow of carrying object 5.With regard to operation, increase the flow of fluid 5 by the aperture that increases door 12, otherwise, reduce the flow of fluid 5 by the aperture that reduces door 12.

According to the 3rd embodiment shown in Fig. 4 c, door-represent-be arranged in expediently the inlet duct place of combustion air A in this example with Reference numeral 120.In this case, increase the flow of carrying object 5 by the aperture that increases door 120, otherwise, the carrying object flow reduced by apertures that reduce door 120 itself.

According to a kind of embodiment, described adjusting device comprises the flow regulator of carrying object 5.

According to the embodiment of the invention described in Fig. 4 a, the flow regulator of this carrying object 5 can comprise the speed regulator tool of fan 7, for example the execution utensil of current transformer 11 or other types.

According to the embodiment of the invention described in Fig. 4 b, the 4c, the flow regulator of this carrying object 5 can comprise or not comprise that being arranged in flue gas discharges one or more adjustable gates 12,120 in the intake line of the porch of chimney 13 and/or combustion air A.

Especially, each described Men Douke individually or with other in combination and combine or be independent of predetermined fan speed change actuating unit and be provided with.

Viewpoint from operation, the flow regulator of this carrying object 5-no matter its concrete embodiment how-allow to be adjusted in the pressure of setting in the burner 3, and it is therefore such as previously explained, regulate the flow of combustion air/fuel gas mixture, and regulate the thermal power that burner 3 is supplied with at last.

Advantageously, regulate or regulate based on the position (aperture) of at least one opposite house 12,120 in the following temperature: the temperature of carrying object 5 in the loop through 11 pairs of fans 7 of current transformer, the discharge flue gas 5 that comes out from chimney 13 ' temperature, the hull-skin temperature of radiant tube 2 or environment temperature.Detect by special hygrosensor 14 for regulating selected temperature.

Preferably, based on the temperature of wanting heating area with selectively based on another temperature at least in the above-mentioned listed temperature, the carrying object flow is regulated.

For this reason, equipment 1 is provided with the hygrosensor 14 that is used for detecting environment temperature, related with hygrosensor 14 selectivity can have at least that another is used for detecting the detector of the temperature of the carrying object 5 that flows to the loop, perhaps be used for detecting the detector of the flue-gas temperature that flows to chimney 13, perhaps be used for detecting the detector of radiant tube hull-skin temperature.

Preferably, regulate the flow of carrying object 5 through the adjusting of current transformer or door position with control module 15 controls.Detector 14 all is connected to control module 15 with the every other hygrosensor related with detector 14 selectivity.

As already mentioned, according to fourth embodiment of the invention shown in Figure 5, except temperature signal, same control module 15 can also receive with one or detected or more pressure signals of multiple pressure force detector 100 more.These pressure detectors 100 can be arranged in the combustion chamber 4 or near, be used for controlling combustion gas opening valve 8.

On function, in equipment 1 according to the present invention, the flow of the carrying object 5 that circulates in the loop by direct regulation and control is controlled the amount of the air-fuel gas mixture that enters burner 3, and the thermal power of being supplied with is regulated.

One or more hygrosensors 14 is through the logic of change carrying object 5 recirculating masses that contain in the electronic control units, the power that control burner 3 places need.The flow of ignition mixture directly depends on the recirculating mass of carrying object 5.

Advantageously, in equipment 1 according to the present invention, therefore the flow of air fuel gas mixture (A+G) always keeps best according to actual pressure present in the combustion chamber 4, even change in time for the flow of the variation carrying object 5 of atmospheric conditions, load loss etc.

In this way, improved the integral energy performance of equipment own.This is because the fact that the thermal power of being supplied with is calibrated according to room actual heating needs basically.In fact, can carry out fine tuning to the air and the combustion gas at burner inlet place.

And if carry out the adjusting of carrying object flow by the speed that acts on fan 7, when near the set point temperatures condition, the speed of fan 7 reduces gradually, and the result compares the electrical power that significantly saving is absorbed with legacy equipment.In this way,, consider the thermal power of burner 3 supplies under this situation and the electrical power that fan 7 absorbs, also can increase the whole efficiency of equipment even guarantee the optimal allocation of electrical power along whole loop.

According to a kind of embodiment, integrate, in above-mentioned any equipment, be provided with individually or jointly: the adjusting utensil (carrying out utensil) that is suitable for changing rotation speed of the fan such as fan; Utensil or other fuel control valve shutters that is fit to are carried out in combustion gas; Be used for blocking the door position actuator tool that flue gas leaks; Be used for blocking the door position actuator tool that enters combustion air.And, with above-mentioned these utensils each or all jointly or discretely, the said equipment also is provided with control device, its utilizes and to come from the equipment of being arranged in and/or or more signals of the outer sensor device of equipment, control command is carried out on reaction type ground, for example operate in open loop situations in order to control these utensils, and combine or replace open loop situations with open loop situations and operate in the closed loop state based on the predetermined calibration value.Described sensor device is such as one or more hygrosensor, it is arranged in the loop, and/or in the exhanst gas outlet pipeline, and/or on the radiant tube outer surface, and/or in the room that will heat, and/or be used for surveying air themperature in the equipment of being incorporated into, like this, based on ambient parameter and/or predetermined temperature reprogramming, the optimum operation of conditioning equipment.

Especially, according to further embodiment, above-mentioned any equipment it is contemplated that and be not used for blocking the door that flue gas leaks, and the adjusting that will wish is transferred to above-mentioned any other adjusting devices and finished.

Further purpose of the present invention is a kind of method, is used for the firing equipment (the especially equipment of the above-mentioned type) of accommodation zone radiant tube, the thermal power of being supplied with.

This device intends is given at least one room heating, and comprises at least:

-sucking air burner, it can be supplied to combustion air flow A and gas flow G, is used for producing in the combustion chamber high-temperature combustion product;

-closed radiant tube loop, above-mentioned combustion product can flow in this loop, determines the carrying object flow.

Preferably, the firing equipment of band radiant tube comprises and is suitable for making the fan that carrying object circulates and is arranged in adjustable gate in the loop in the closed-loop path.This equipment also is provided with the chimney that is used for the discharge of at least a portion recyclegas.

According to the present invention, described method comprises operating procedure: the combustion chamber pressure inside that detects burner.This pressure-draw up absolute value-less than atmospheric pressure also directly depends on the value of carrying object flow.When the carrying object flow reduces, the pressure decline (perhaps, bigger low pressure being arranged) in the combustion chamber.On the other hand, when the carrying object flow increases, the pressure rising (that is, lower low pressure being arranged) in the combustion chamber.

Thus, can expect operating procedure:, regulate the gas flow G that enters into the combustion chamber based on above-mentioned detected force value.

In this step, make gas flow G along with the present pressure in combustion chamber changes: by increasing pressure (and therefore in system, producing the low pressure lower) than atmospheric pressure, the inlet gas flow correspondingly reduces, otherwise, by reducing pressure (and therefore producing the higher low pressure of relative atmospheric pressure), gas flow increases.

Described method is further expected operating procedure: also directly regulate the purpose of inlet gas flow G and the purpose of therefore regulating the thermal power of burner supply in order to change internal pressure of combustion chamber, regulate the flow of carrying object.

A preferred embodiment of the method according to this invention is carried out the step of regulating the carrying object flow by the revolution that changes described fan.

As has already been mentioned above, owing to reduced the electrical power that fan absorbs, allow the whole efficiency of raising equipment like this.

An alternative embodiment of the method according to this invention is carried out the step of regulating the carrying object flow by the aperture that changes door.

Advantageously, preferably carry out the step of regulating the carrying object flow based on the temperature of wanting Heating Room.In any case, can consider to regulate the carrying object flow, also have the carrying object temperature, discharge flue-gas temperature and/or radiant tube hull-skin temperature.

Further purpose of the present invention is the technology that above-mentioned band radiant tube equipment is installed.

Advantageously, the equipment of band radiant tube 1 can be calibrated under the actual motion condition according to compare faster easier mode with the similar devices of known type according to the present invention.

In fact, in the equipment of known type, must after making equipment reach stable condition, calibrate.Like this time of Xu Yaoing long, and because the value of ignition mixture flow A+G is directly not relevant with the flow value of carrying object 5, it is not always easy calibrating.

On the other hand, in equipment 1 according to the present invention,,, needn't make it reach stable state so can behind erection unit, carry out calibration operation immediately because gas flow is directly relevant with the flow of carrying object 5.On function, in fact, the relation in gas flow G and the combustion chamber 4 between the force value and and the flow of carrying object 5 between the pass tie up to when service condition changes and kept.

In more detail, mounting process according to the present invention is expected following service condition:

-the step of facilities 1 in the building that will heat;

The step of the maximum useful flow of-setting carrying object 5;

-control valve 8 of gas flow G is calibrated to the step of the maximum stream flow of carrying object 5;

-utilize the step be lower than or equal the thermal power that the carrying object flow-control burner 3 of the maximum useful flow of above-mentioned carrying object 5 produces in running.

In the equipment step, the firing equipment 1 of the band radiant tube 2 of the above-mentioned type is installed in the building that will heat, and especially radiant tube 2 is fixed on the ceiling.

Be for the carrying object in the closed-loop path of such installed device 5 subsequently, set its maximum useful flow.

This maximum stream flow correspondence of carrying object 5 minimum pressure (maximum low pressure) in the burner 4 and the corresponding maximum stream flow of the combustion air A that sucked.

Imagination is carried out the adjusting of carrying object 5 flows by the revolution that changes fan 7 if be in operation, so, in this equipment step, by suitably regulating the flue gas ejection door 12 be arranged in primary air A inlet duct place and the aperture of door 120, the maximum stream flow of calibrating combustion air A.

Imagination is carried out the adjusting of carrying object 5 flows by the aperture of regulating one of two doors 12,120 if be in operation, so, set in the step at this, by determine the revolution of fan 7, the maximum stream flow of calibrating combustion air A easily according to actual load loss in the loop.

After the above-mentioned setting step, carry out the calibration of the control valve 8 of gas flow G.In this calibration steps,, determine the maximum stream flow of combustion gas G based on predetermined ratio with respect to the maximum stream flow of combustion air A.

The maximum heat power that these conditions of the largest loop flow of carrying object 5 can produce corresponding to burner 3.

In this, circulate, carry out the step that thermal power that burner 3 is produced is controlled in running by making the carrying object flow 5 that is lower than or equals the useful flow of carrying object 5 above-mentioned maximums.

Normally in service at equipment 1, hygrosensor 14 or detector 14 are connected in top electronic control unit 15, change the flow of carrying object 5, the thermal power that control burner 3 requires by the aperture of revolution through regulating fan 7 or door 12,120.

Mention that as the front variation correspondence of carrying object 5 flows the variation of pressure in the combustion chamber 4 of burner 3.The pressure swabbing effect of the air mass flow by depending on the pressure size, and also depend on the discharging effect of the gas flow G of pressure size by valve 8, this pressure changes the inevitable direct control that has determined air fuel gas mixture flow rate (A+G).

In a practical embodiment of the invention, the present invention can take to be different from shape and the structure of above-mentioned illustrational embodiment, but can not break away from protection scope of the present invention.

And all parts can be replaced with the technical parts that are equal to, and used size, shape, material can be any situations as required.

Claims

1. firing equipment with radiant tube comprises:

-burner (3), it is provided with combustion chamber (4) and is used for making the ignition mixture burning to produce high-temperature combustion product, and described ignition mixture obtains with at least a combustion air flow (A) and at least a gas flow (G);

-closed-loop path, it is provided with and is used for coming by radiation the radiant tube (2) of heat rooms, and carrying object (5) can be transmitted in described closed-loop path, and described carrying object (5) is heated by described combustion product is introduced in the described closed-loop path;

-at least one fan (7), the upstream that it is arranged in described burner (3) is used to make described carrying object (5) under low pressure to circulate and enters described closed-loop path (2);

-adjusting device is used to regulate the flow (A+G) of described ignition mixture, to change the thermal power that described burner (3) is produced;

It is characterized in that, described adjusting device comprises at least one control valve (8) of described gas flow (G), the aperture of described control valve (8) directly is subjected to the control of at least one force value in regulation and control, described force value is detected and be lower than atmospheric pressure in described combustion chamber (4), and described force value has determined to be forced to suck the described combustion air flow (A) of described burner (3).

2. equipment according to claim 1, wherein, the control valve of described gas flow (8) is provided with shutter (9), and described shutter (9) is used for changing its position based on described combustion chamber (4) interior force value own through a pipeline (10) and described combustion chamber (4) UNICOM.

3. equipment according to claim 1, wherein, the control valve (8) of described gas flow (G) can be set about different calibration values.

4. according to claim 2 or 3 described equipment, wherein, the control valve (8) of described gas flow (G) is provided with screw (20 '), and described screw (20 ') is used for regulating the spring of the shutter (9) of described valve (8), and described screw (20 ') allows described control valve (8) is calibrated.

5. equipment according to claim 2, wherein, described pipeline (10) is provided with adjustable bypass (20), and described bypass (20) is suitable for changing the pressure that acts on the described shutter (9) with respect to described combustion chamber (4) interior force value own.

6. equipment according to claim 1, wherein, the control valve of described gas flow (8) is a solenoid valve, based on the pressure that at least one pressure detector (100) in being arranged in described combustion chamber (4) detects in described combustion chamber (4), described solenoid valve is controlled by control module (15).

7. equipment according to claim 1, wherein, the described adjusting device that is used for regulating described ignition mixture flow (A+G) comprises the execution utensil (11) of the motor revolution that is used for controlling described fan (7), and described execution utensil (11) is controlled by at least one hygrosensor (14).

8. equipment according to claim 1, wherein, the described adjusting device that is used for regulating described ignition mixture flow (A+G) comprises adjustable gate (12,120), described adjustable gate (12,120) can change the flow of the carrying object (5) that circulates and therefore change force value in the described combustion chamber (4) in described loop, the position of described adjustable gate (12,120) is controlled by at least one hygrosensor (14).

9. equipment according to claim 1, wherein, the described adjusting device that is used for regulating described ignition mixture flow (A+G) comprises the device that is used for regulating carrying object (5) flow, and the described device that is used for regulating carrying object (5) flow allows the non-pressure of directly regulating the inside, described combustion chamber (4).

10. equipment according to claim 9, wherein, the described device that is used for regulating carrying object (5) flow comprises the execution utensil (11) of the motor revolution that is used for controlling described fan (7), and described execution utensil (11) is controlled by at least one hygrosensor (14).

11. according to claim 7 or 10 described equipment, wherein, described execution utensil (11) is a current transformer.

12. equipment according to claim 9, wherein, the described device that is used for regulating carrying object (5) flow comprises adjustable gate (12,120), described adjustable gate (12,120) can change the flow of the carrying object (5) that circulates and therefore change force value in the described combustion chamber (4) in described loop, the position of described adjustable gate (12,120) is controlled by at least one hygrosensor (14).

13. according to Claim 8 or 12 described equipment, it is characterized in that, described adjustable gate (12) be arranged in a part of described carrying object (5) discharge chimney (13) the bottom and be suitable for the recirculating mass of described carrying object flow delivery flow (5 ') of going out from described chimney (13) and described loop (cut apart between 5 ").

14. according to Claim 8 or 12 described equipment, it is characterized in that described adjustable gate (120) is arranged in the inlet intake line place of described combustion air (A).

15. according to claim 7,8,10 or 12 described equipment, wherein, described hygrosensor (14) is suitable for detecting the temperature of described carrying object (5).

16. according to claim 7,8,10 or 12 described equipment, wherein, described hygrosensor (14) is suitable for detecting the temperature of the discharge flue gas (5 ') that comes out from chimney (13).

17. according to claim 7,8,10 or 12 described equipment, wherein, described hygrosensor (14) is suitable for detecting the hull-skin temperature of described radiant tube (2).

18. according to claim 7,8,10 or 12 described equipment, wherein, described hygrosensor (14) is suitable for detecting environment temperature.

19. according to claim 7,8,10 or 12 described equipment, wherein, described hygrosensor (14) is suitable for detecting environment temperature, and at least one second hygrosensor of the temperature of the temperature of the discharge flue gas (5 ') that comes out with the temperature that is suitable for detecting described carrying object (5), from chimney (13) or described radiant tube (2) is associated.

20. the method for the thermal power that a firing equipment that is used for the accommodation zone radiant tube is supplied with, described equipment are used at least one room is heated and comprises:

-sucking air burner, it is supplied with combustion air flow (A) and gas flow (G), is used for producing high-temperature combustion product in the combustion chamber;

Can circulate and enter in the described closed-loop path in the closed-loop path of-radiant tube, described combustion product, described closed-loop path limits a carrying object flow;

Described method is characterised in that this method comprises following operating procedure:

-detecting the step of the inside, the combustion chamber pressure of described burner, described pressure is lower than atmospheric pressure and depends on the value of described carrying object flow;

-regulate the step of described gas flow (G) based on described pressure;

-regulate the step of carrying object flow, be used to change described pressure, and then change described gas flow (G), and therefore change described thermal power.

21. method according to claim 20, wherein, described equipment comprises is suitable for fan that described carrying object is circulated that in described loop wherein, the step of described adjusting carrying object flow is suitable for changing the revolution of described fan.

22. method according to claim 20, wherein, described equipment comprises the adjustable gate of arranging in the described loop, and wherein, the step of described adjusting carrying object flow is suitable for changing the aperture of described door.

23., wherein, carry out the step of described adjusting carrying object flow based on the temperature in the room that will heat according to each described method in the claim 20 to 22.

24. method according to claim 23, wherein, described equipment is provided with the discharge chimney of part of smoke, and wherein, also the temperature of the flue gas of discharging based on described discharge chimney is carried out the step of described adjusting carrying object flow.

25. method according to claim 23 wherein, is also carried out the step of described adjusting carrying object flow based on the temperature of described radiant tube outer surface.

26. method according to claim 23 wherein, is also carried out the step of described adjusting carrying object flow based on the temperature of described carrying object.

27. the mounting process according to the firing equipment of each described band radiant tube in the claim 1 to 19 is characterized in that this technology comprises:

-the step of the described equipment of equipment in the building that will heat;

-set the step of its maximum useful flow for the carrying object in the closed-loop path of mounted described equipment, the useful flow of described maximum has determined the corresponding maximum stream flow of the combustion air of minimum pressure in the described combustion chamber and suction;

-gas flow is calibrated to the step of maximum stream flow, the maximum stream flow of described gas flow has predetermined ratio with respect to the maximum stream flow of described combustion air, gas flow is calibrated to maximum stream flow has determined calibration to described burner maximum heat power;

-by means of regulate described carrying object flow and thereby regulate pressure in the described combustion chamber, utilization is lower than or equals the carrying object flow of the useful flow of described maximum, be controlled at the step of the thermal power that is produced by described burner in the running, the pressure in the described combustion chamber is responsible for by described control valve decision gas flow and by forcing suction decision combustion air flow.

28. technology according to claim 27 is characterized in that, the adjusting of described carrying object flow is controlled by hygrosensor, and described hygrosensor acts on and is used for controlling on the execution utensil of described fan electromotor revolution.

29. technology according to claim 28, wherein, described execution utensil is a current transformer.

30. technology according to claim 28 is characterized in that, the adjusting of described carrying object flow realizes through overregulating by the door of at least one hygrosensor control.