CN209355216U - Heating control apparatus, as the occasion requires heating system and boiler system - Google Patents
Heating control apparatus, as the occasion requires heating system and boiler system Download PDFInfo
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- CN209355216U CN209355216U CN201821877241.4U CN201821877241U CN209355216U CN 209355216 U CN209355216 U CN 209355216U CN 201821877241 U CN201821877241 U CN 201821877241U CN 209355216 U CN209355216 U CN 209355216U
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Abstract
The utility model relates to steam power plant technical fields, more particularly, to a kind of heating control apparatus, as the occasion requires heating system and boiler system.Heating control apparatus includes motor-driven valve, shut-off valve and regulating valve；The motor-driven valve, the regulating valve and the shut-off valve are arranged in series.Heating system includes hot vapour feeding mechanism, high temperature heater (HTH) and heating control apparatus described in any of the above embodiments as the occasion requires；The hot vapour feeding mechanism is connect by the heating control apparatus with the high temperature heater (HTH).Boiler system includes heating system as the occasion requires described in any of the above embodiments.Heating control apparatus, as the occasion requires heating system and boiler system provided by the utility model, it is heated again using hot vapour feeding mechanism to high temperature heater (HTH), the hot vapour of hot vapour feeding mechanism is avoided to flow back by heating control apparatus, guarantee the effect of heating, and then ensure that the temperature of SCR catalyst conversion zone, it ensure that being normally carried out for denitrating system.
Description
Technical field
The utility model relates to steam power plant technical fields, more particularly, to a kind of heating control apparatus, as the occasion requires plus
Hot systems and boiler system.
Background technique
With the aggravation of China's environmental pollution, environmental protection administration is to coal-burning power plant NOxThe supervision punishment of discharge is further
It increases, Beijing-tianjin-hebei Region becomes the emphasis of state supervision, and environmental protection administration requires coal-burning power plant's unit from grid-connected to off-the-line overall process
Carry out denitrating flue gas (nitrogen oxides reduction) processing.Currently, denitrating flue gas generallys use at SCR (selective catalytic reduction)
Reason, when SCR catalyst conversion zone temperature is lower than 300 DEG C, catalytic effect is quickly reduced, and is equipment denitrating system after protection stove
Operation will be automatically exited from, therefore it is extremely urgent to implement full load denitration transformation.
Utility model content
The purpose of this utility model is to provide a kind of heating control apparatus, as the occasion requires heating system and boiler systems, with solution
Certainly the technical problems existing in the prior art.
Heating control apparatus provided by the utility model, including motor-driven valve, shut-off valve and regulating valve；
The motor-driven valve, the regulating valve and the shut-off valve are arranged in series.
Further, the shut-off valve includes formal dress shut-off valve and anti-dress shut-off valve；
The formal dress shut-off valve and the anti-dress shut-off valve are arranged in series.
Further, the formal dress shut-off valve is arranged in close to one end of the regulating valve in the anti-dress shut-off valve.
Further, the regulating valve is pneumatic control valve.
The utility model additionally provides a kind of heating system as the occasion requires comprising hot vapour feeding mechanism, high temperature heater (HTH) and on
State described in any item heating control apparatus；
The hot vapour feeding mechanism is connect by the heating control apparatus with the high temperature heater (HTH).
Further, condenser is connected on the high temperature heater (HTH).
Further, hydrophobic development unit is provided between the high temperature heater (HTH) and the condenser.
Further, the condenser is arranged in parallel with the heating control apparatus.
Further, heating system further includes controller as the occasion requires；
The controller is connect with the hot vapour feeding mechanism, high temperature heater (HTH) and heating control apparatus respectively.
The utility model additionally provides a kind of boiler system comprising heating system as the occasion requires described in any of the above embodiments.
Heating control apparatus, as the occasion requires heating system and boiler system provided by the utility model, utilize hot vapour feeding mechanism
It is heated again to high temperature heater (HTH), avoids the hot vapour of hot vapour feeding mechanism from flowing back by heating control apparatus, guarantee heating
Effect, and then ensure that the temperature of SCR catalyst conversion zone, ensure that being normally carried out for denitrating system.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of heating system as the occasion requires provided by the embodiment of the utility model.
Appended drawing reference:
1: motor-driven valve；2: regulating valve；3: counter to fill shut-off valve；4: hydrophobic development unit；5: formal dress shut-off valve；6: high-temperature heating
Device；7: hot vapour feeding mechanism.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
As shown in Fig. 1, the utility model provides a kind of heating control apparatus, including motor-driven valve 1, shut-off valve and adjusting
Valve 2；
The motor-driven valve 1, the regulating valve 2 and the shut-off valve are arranged in series.
Motor-driven valve 1 is sent to what hot vapour continued in high temperature heater (HTH) 6, is adjusted by regulating valve 2 and is sent into speed, by cutting
Only valve can prevent hot vapour from flowing back, and guarantee the continuous high temperature heating of high temperature heater (HTH) 6.
Further, the shut-off valve includes formal dress shut-off valve 5 and anti-dress shut-off valve 3；
The formal dress shut-off valve 5 and the anti-dress shut-off valve 3 are arranged in series.
After being installed in series by formal dress shut-off valve 5 and anti-dress shut-off valve 3 two, it can adequately guarantee that hot vapour can only be from heat
Vapour feeding mechanism 7 is flowed to high temperature heater (HTH) 6, guarantees persistently to ensure that high temperature heater (HTH) 6 to 6 steam supply of high temperature heater (HTH)
Heating temperature.
Specifically, in the present embodiment, the anti-dress shut-off valve 3 is arranged in the formal dress shut-off valve 5 close to the adjusting
One end of valve 2.
Further, the regulating valve 2 is pneumatic control valve 2.
Pneumatic control valve 2 be exactly using compressed gas as power source, using cylinder as actuator, and by means of valve positioner,
The attachmentes such as converter, solenoid valve, guarantor's position valve, air accumulator, pneumatic filter remove driving valve, realize switching value or proportion expression tune
Section receives the control signal of industrial automation control system to complete to adjust pipeline medium: flow, pressure, temperature, liquid level etc.
Various parameters of technique process.The characteristics of pneumatic control valve 2 is exactly that control is simple, rapid reaction, and essential safety, is not required in addition again
Take explosion precaution.
It should be pointed out that in the present embodiment, regulating valve 2 uses pneumatic control valve 2, but it is not limited solely to
This is a kind of for pneumatic control valve 2, can also be electric control valve 2, hydraulic adjusting valve 2 etc., as long as also just described or, it can be real
Now to the adjusting of the parameters such as flow, temperature in pipeline.
The utility model additionally provides a kind of heating system as the occasion requires comprising hot vapour feeding mechanism 7,6 and of high temperature heater (HTH)
Heating control apparatus described in any of the above embodiments；
The hot vapour feeding mechanism 7 is connect by the heating control apparatus with the high temperature heater (HTH) 6.
The optimal reaction temperature of denitrating catalyst is between 320-380 DEG C, at set grid-connection initial stage, since steam turbine heats
Device sucking rate is few so that feed temperature is relatively low, and the enhancing of economizer endothermic effect causes flue-gas temperature decline in SCR region domain more.Together
When unit load is reduced to 40%, due to the decrease of boiler combustion intensity, SCR region domain smoke temperature is caused to decline.Both works
Condition can all cause the temperature in SCR region domain lower than the reaction temperature of catalyst, when SCR catalyst conversion zone temperature is lower than 300 DEG C
When catalytic effect quickly reduce, the escaping of ammonia rate is sharply increased, be protection stove after corrosion and damage of the equipment from ammonia, denitrating system
Must be out of service, the bottleneck that full load denitration puts into operation is restricted to become.
To make SCR region domain temperature reach the reaction temperature of catalyst, method can be taken to improve feed temperature, reduce economizer
Caloric receptivity, so that the temperature in SCR region domain is finally met catalyst requirement.The method widely taken at present is mainly by following several:
Two-stage economizer arrangement, the bypass of economizer fume side, the bypass of economizer water side, economizer separate flue, as the occasion requires heating etc..
In the present embodiment, the parameter of specific product is as follows:
326 DEG C of 50%THA operating condition economizer exit smoke temperature is designed, according to unit practical operation situation when unit is just grid-connected
SCR region domain smoke temperature is about at 280 DEG C, and about 80 DEG C of economizer inlet water temperature or so outlet temperatures are at 100 DEG C or so.It will by calculating
Economizer inlet water temperature is increased to 180 DEG C, and SCR region domain smoke temperature can be improved to 320 DEG C.Therefore it determines to use hot vapour feeding mechanism 7
(as the occasion requires cold again) further increases feed temperature for hot vapour to high temperature heater (HTH) 6, reduces economizer caloric receptivity, improves SCR reaction
The temperature in region makes catalyst guarantee that denitrating system operates normally in the reaction temperature section of allowance, so that reaching reduces NOx's
Purpose is met environmental requirements.
Unit puts into operation during opening machine, fluctuates larger feedwater flow in ignition of the boiler initial stage steam water-level according to dum boiler
The steam of unstable feature, hot vapour supply system will carry out heating coil in advance, throw after boiler plays the high and low bypath system investment of pressure
Enter slowly to put into this system.
Confirm that high temperature heater (HTH) 6 has continuous water supply to pass through when investment, ≯ 1.5 DEG C of control high temperature heater (HTH) 6 outlet heating/
Min, control economizer exit coolant-temperature gage have 30 DEG C or more degree of supercoolings, prevent from putting into because of high temperature heater (HTH) 6 and excessive draw water supply and saving
The vaporization of coal device.To guarantee that the stable operation setting " electrically operated gate and pitch that interlocking close heats as the occasion requires are interrupted in water supply " of system is protected
Shield, to prevent 6 water side carburetion system of high temperature heater (HTH) from causing system vibration.
Before this unit starting steam turbine red switch, when 6 water side outlet temperature of high temperature heater (HTH) is heated to 150 DEG C, SCR inlet
Smoke temperature has met denitration investment condition up to 305 DEG C.
SCR region domain temperature meets catalyst requirement, investment denitration spray ammonia system operation when set grid-connection, and control denitration goes out
Mouthful, reach the synchronous investment purpose of set grid-connection denitrating system.
Further, condenser is connected on the high temperature heater (HTH) 6.
Condenser is exactly a kind of heat exchanger that turbine discharge is condensed into water, also known as steam condenser.In the present embodiment, in height
Condenser is connected on warm heater 6, the heat that high temperature heater (HTH) 6 can be discharged condenses high-temperature gas after utilizing
For water, to be supplied to hot vapour feeding mechanism 7, so that water resource is able to carry out sufficient utilization.
Further, hydrophobic development unit 4 is provided between the high temperature heater (HTH) 6 and the condenser.
Hydrophobic development unit 4 is that effect is to isolate steam and hydrophobic instrument.
In the present embodiment, after hydrophobic development unit 4 being set between high temperature heater (HTH) 6 and condenser, high temperature can be added
The water generated and the gas not condensed separation, so that gas is able to enter in condenser, are condensed into after hot device 6 exchanges heat
Water, then recycled jointly with the water of hydrophobic development unit 4.
In the present embodiment, the condenser is arranged in parallel with the heating control apparatus.
Further, heating system further includes controller as the occasion requires；
The controller is connect with the hot vapour feeding mechanism 7, high temperature heater (HTH) 6 and heating control apparatus respectively.
By the setting of controller, so that heating temperature is able to carry out automatic control, when the temperature in SCR region domain reaches 300
After DEG C, the regulating valve 2 in heating control apparatus can be adjusted by controller, change evaporation capacity for engine, so that can either protect
The minimum temperature requirement of 300 DEG C of card, and can adequately save resource.
The utility model additionally provides a kind of boiler system comprising heating system as the occasion requires described in any of the above embodiments.
The boiler system of the utility model draws from cold (hot vapour feeding mechanism 7) again as the occasion requires and connects heating steam to high-temperature heating
Device 6 drains into condenser for hydrophobic using 6 accident of high temperature heater (HTH) is hydrophobic, cooperates optimizing operating mode, promote feed temperature, subtract
Few economizer caloric receptivity, SCR inlet smoke temperature meets denitration investment condition up to 300 DEG C when realizing set grid-connection and off-the-line.
Heating control apparatus, as the occasion requires heating system and boiler system provided by the utility model, have the following characteristics that
1. small investment, entire 350,000/platform of heating system gross investment as the occasion requires, construction cost 7.5 ten thousand, fee of material 27.5 ten thousand.
2. short construction period, total construction period is within 10 days, wherein the time for needing to shut down construction only needs 24 hours,
The unit for providing vapour source can construct under non-stop-machine operating condition.
3. system is simply easily operated, heating control apparatus is only provided with electronic total door, pneumatic pitch, non-return flap, manually
Door it is each one and 4 road pipelines it is hydrophobic, put into, log off it is convenient and efficient.
4. improving boiler feed temperature by heating system as the occasion requires has advantage: improving boiler thermal efficiency reduces power generation coal
Consumption, the caloric receptivity for improving feed temperature reduction water-cooling wall are conducive to the stabilization of combustion system, accelerate unit starting speed, denitration system
Investment synchronous with set grid-connection of uniting avoids the exceeded examination of environmental protection administration.
It is a generally existing phenomenon that thermal power plant unit, which can not achieve full load denitration, not with environmental requirement
Disconnected to improve, each power plant will carry out environmental transformation, heating control apparatus, as the occasion requires heating system, pot provided by the utility model successively
The full load denitration modification scheme of furnace system has small investment, short time limit, system simple, easily operated, the advantages such as reliability height,
The environmentally friendly fitness of unit is greatly improved, environmentally friendly accident is avoided.The full load denitration scheme is worth vast thermal power plant
Reference, reference and popularization.
Heating control apparatus, as the occasion requires heating system and boiler system provided by the utility model, utilize hot vapour feeding mechanism 7
It is heated again to high temperature heater (HTH) 6, avoids the hot vapour of hot vapour feeding mechanism 7 from flowing back by heating control apparatus, guarantee to add
The effect of heat, and then ensure that the temperature of SCR catalyst conversion zone, it ensure that being normally carried out for denitrating system.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means to be in the utility model
Within the scope of and form different embodiments.For example, embodiment claimed is appointed in claims above
Meaning one of can in any combination mode come using.The information disclosed in the background technology section is intended only to deepen to this
The understanding of the general background technology of utility model, and be not construed as recognizing or implying in any form that information composition has been
The prior art known in those skilled in the art.
Claims (9)
1. a kind of heating control apparatus, which is characterized in that including motor-driven valve, shut-off valve and regulating valve；
The motor-driven valve, the regulating valve and the shut-off valve are arranged in series；
The shut-off valve includes formal dress shut-off valve and anti-dress shut-off valve；
The formal dress shut-off valve and the anti-dress shut-off valve are arranged in series.
2. heating control apparatus according to claim 1, which is characterized in that the anti-dress shut-off valve is arranged in the formal dress
Shut-off valve is close to one end of the regulating valve.
3. heating control apparatus according to claim 1, which is characterized in that the regulating valve is pneumatic control valve.
4. a kind of heating system as the occasion requires, which is characterized in that appoint including hot vapour feeding mechanism, high temperature heater (HTH) and claim 1-3
Heating control apparatus described in one；
The hot vapour feeding mechanism is connect by the heating control apparatus with the high temperature heater (HTH).
5. heating system as the occasion requires according to claim 4, which is characterized in that be connected with condensing on the high temperature heater (HTH)
Device.
6. heating system as the occasion requires according to claim 5, which is characterized in that the high temperature heater (HTH) and the condenser it
Between be provided with hydrophobic development unit.
7. heating system as the occasion requires according to claim 5, which is characterized in that the condenser and the heating control apparatus
It is arranged in parallel.
8. heating system as the occasion requires according to claim 4, which is characterized in that further include controller；
The controller is connect with the hot vapour feeding mechanism, high temperature heater (HTH) and heating control apparatus respectively.
9. a kind of boiler system, which is characterized in that including the described in any item heating systems as the occasion requires of claim 4-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821877241.4U CN209355216U (en) | 2018-11-14 | 2018-11-14 | Heating control apparatus, as the occasion requires heating system and boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821877241.4U CN209355216U (en) | 2018-11-14 | 2018-11-14 | Heating control apparatus, as the occasion requires heating system and boiler system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209355216U true CN209355216U (en) | 2019-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821877241.4U Active CN209355216U (en) | 2018-11-14 | 2018-11-14 | Heating control apparatus, as the occasion requires heating system and boiler system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209355216U (en) |
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2018
- 2018-11-14 CN CN201821877241.4U patent/CN209355216U/en active Active
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