CN104976601A - Steam generation method - Google Patents

Abstract

A steam generation method comprises a gas, fuel oil, fire coal powder and biomass-fired steam boiler and an electric heating steam boiler or an electric heating steam generator; a steam pressure controller or a steam temperature controller are provided with a set steam pressure (or steam temperature) high limit value and a steam pressure (or steam temperature) low limit value; an electric heating device can heat up water or steam when the boiler or steam generator close a steam supply valve; the steam supply valve starts to supply steam when the steam pressure (or steam temperature) rises to the high limit value, and then the heating device immediately reduces a heating intensity or stops heating; the steam supply valve closes when the steam pressure (or steam temperature) drops to the low limit value, and the heating device immediately enlarges the heating intensity or starts heating, and operations and works move in cycles. The method may need a steam storage tank or a steam heat accumulator, and may not need them, and steam demands makes the determination; if steam and water are used, then the steam storage tank or the steam heat accumulator are not needed; the steam storage tank or the steam heat accumulator are needed for balance steam supply. The method is energy saving, uses less investment, and is specially applied to steam boiler energy saving reconstruction.

Description

A kind of method producing steam

Art

A kind of method producing steam of the present invention, comprises combustion gas, fuel oil, burning coal powder, biomass-burning steam boiler and electrically heated boiler or electric heating steam generator, steam storage tank or steam accumulator, relevant pipe valve involved by this method, water treatment, give (benefit) water, Stress control, temperature controls, Combustion System, electrical heating elements controls, safety valve, blowdown, the electric control gear (or micro computer) of insulation and whole system, especially adopt the water in the low limit value of vapour pressure (or the low limit value of the steam temperature) pot set by heating or steam to make it to reach set vapour pressure ceiling value (or steam temperature ceiling value) and open steam supply valve immediately, reduce heating intensity immediately or suspend heating, and increase heating intensity when vapour pressure or steam temperature are down to set low limit value immediately or raw newly start heating ... run so circularly or work energy-conservation and the new method of the generation steam of the reducing energy consumption of the various boilers that can be used in.

Background technology

At present, known combustion gas, fuel oil, burning coal powder, biomass-burning steam boiler and electrically heated boiler or electric heating steam generator, the method that they produce steam is, combustion apparatus or electrical heating elements work are heated to certain steam pressure unlatching steam supply valve the water in pot or steam outwards provides saturated vapor, under the state of especially opening all the time at steam supply valve, constantly heating water or steam (temporarily stop boiler or steam generator work except unprovoked time-out vapour, or be in the work of keeping warm mode) so constantly outside defeated for steam, do not make full use of the feature of air heat motion, namely the method for common generation steam is less than the water in heating boiler under the state of closing at steam supply valve or steam, when steam reaches elevated pressures, (or higher temperature) is opened steam supply valve and is outwards defeated by steam, reduce the heating intensity of combustion apparatus or electrical heating elements therebetween immediately or suspend heating, vapour pressure (or steam temperature) drop to comparatively lower vapour pressure (or steam temperature) time increase add heat or restart heating, with the method for the so a kind of energy-conservation generation steam run so circularly or work.

Summary of the invention

In order to solve current combustion gas, fuel oil, burning coal powder, it is carry out under the state of opening all the time at steam supply valve that biomass-burning steam boiler and electrically heated boiler or electric heating steam generator produce steam, namely more energy-conservation state is not reached, the invention provides a kind of new method producing steam, water under its main feature state that to be boiler or steam generator close at steam outlet institute steam supply valve in heating kettle or steam, the traffic coverage of a vapour pressure or vapor (steam) temperature is set in advance by Steam pressure control device or vapor (steam) temperature controller, namely vapour pressure ceiling value (or steam temperature ceiling value) and the low limit value of vapour pressure (or the low limit value of steam temperature) is set, steam supply valve is opened when water or the burned equipment of steam or electrical heating elements are heated to vapour pressure ceiling value (or steam temperature ceiling value), what reduction heater provided immediately adds heat, also reduction heating intensity can be said, or suspend heating, when because opening steam supply valve outside steam supply, steam supply valve is closed when vapour pressure (or steam temperature) is down to set vapour pressure (or steam temperature) low limit value, increase heating intensity (what namely increase combustion apparatus or electrical heating elements heating water or steam is defeated by heat) immediately, when steam pressure or temperature reach set vapour pressure ceiling value (or steam temperature ceiling value), open the outside steam supply of steam supply valve, when steam pressure or steam temperature are down to low limit value, steam supply valve cuts out, and increases immediately and adds heat or start heating ... run so circularly or work.So just produce a problem, namely the vapour pressure of steam supply and steam temperature fluctuation large, be difficult to be applicable to the steam user demand with vapour unit, so this method in use should arrange steam storage tank or steam accumulator and realize steam supply balance by pressure-reducing valve or control valve, but, if by steam heating water, then can not arrange.

The technical solution adopted for the present invention to solve the technical problems is: in combustion gas, fuel oil, burning coal powder, there is suitable Steam pressure control device (or vapor (steam) temperature controller) and set the higher limit (steam temperature ceiling value) that the higher limit (vapour pressure ceiling value) of Steam pressure control or vapor (steam) temperature control in biomass-burning steam boiler and electric heating steam boiler or Electrothermic steam, the lower limit (the low limit value of steam temperature) that the lower limit (the low limit value of vapour pressure) of setting Steam pressure control or vapor (steam) temperature control, the control system of steam pressure (or steam temperature) is all connected with the heating control system of boiler or steam generator.This method, under the steam supply valve closed condition of the steam outlet of boiler or steam generator, water in combustion apparatus or electrical heating elements heating kettle or steam, steam supply valve is opened when steam pressure or vapor (steam) temperature reach vapour pressure (or steam temperature) ceiling value, reduce immediately heating system to by the water that heats or steam the heat energy amount of being defeated by (namely reducing heating intensity) of heating that provides or suspend heating, when steam pressure (or temperature) is down to set vapour pressure (steam temperature) low limit value because opening steam supply valve, close steam supply valve (or electronic closedown) immediately and increase heating intensity immediately, namely increase to water or steam heating the heat energy amount of being defeated by or start heating immediately, that is, steam supply valve cuts out, heat and be heated to vapour pressure (steam temperature) ceiling value, steam supply valve is opened to vapour pressure (steam temperature) low limit value, steam supply valve cuts out again, heat and be heated to vapour pressure (steam temperature) ceiling value, steam supply valve is opened ... run so circularly or work.

When steam supply, both steam storage tank or steam accumulator can be set, also steam storage tank or steam accumulator can not be set, see and use the demand of vapour unit and determine, if with steam direct heating water, do not arrange.

The invention has the beneficial effects as follows: change combustion gas, fuel oil, firing coal dust, the method of biomass-burning steam boiler and electric heating steam boiler or electric heating steam generator generation steam, be about to heat under the originally general steam steam supply valve continuous heating mode be always under opening changes into steam supply valve closed condition, when being heated to set vapour pressure (steam temperature) ceiling value, steam supply valve is opened, reduce heating intensity immediately or stop heating immediately ... so a kind of steam supply valve cuts out heating, steam supply valve is opened and is reduced heating intensity or stop heating ... the generation steam new method moved in circles, because steam operates in, to accept heating institute heat dissipation under the opening and closing state of steam supply valve can be different, and then realize the power consumption minimizing when producing equivalent steam heat, namely energy-conservation.The present invention also can to thousands upon thousands various steam boiler or electric heating steam generator implement reducing energy consumption, and investment is little, remarkable in economical benefits.

Detailed description of the invention

In the method for this generation steam, by combustion gas, fuel oil, burning coal powder, the Steam pressure control device (or vapor (steam) temperature controller) of biomass-burning steam boiler and electric heating steam boiler or electric heating steam generator sets the upper control limit (vapour pressure ceiling value or steam temperature ceiling value) of vapour pressure (or steam temperature), the lower control limit (the low limit value of vapour pressure or the low limit value of steam temperature) of setting steam vapour pressure (or steam temperature), the interval of this upper limit and lower limit is exactly the traffic coverage that heater carries out heating water or steam, the upper limit of steam pressure or temperature is connected with the control system of heater with the control system of lower limit, when steam boiler or electric heating steam boiler or electric heating steam generator run, steam steam supply valve cuts out (can Electronic control), combustion apparatus or electrical heating elements work water in heating kettle or steam, when steam pressure or vapor (steam) temperature reach set vapour pressure (or steam temperature) ceiling value, steam supply valve is opened and is exported steam heat, the combustion apparatus of boiler or electrical heating elements reduce the heat energy amount of being defeated by (reduction heating intensity) that heats water or steam immediately or suspend heating, the process exporting steam heat opened by steam supply valve is exactly the process that vapour pressure (or steam temperature) declines, when vapour pressure (or steam temperature) is down to set vapour pressure (or steam temperature) low limit value, close through control system steam supply valve, now boiler combustion equipment or electrical heating elements increase the heat energy amount of being defeated by that heats water or steam immediately or start heating immediately, when the steam pressure in pot or vapor (steam) temperature reach set vapour pressure (or steam temperature) ceiling value because of continuous heating, steam supply valve is opened and outside delivering vapor heat through control system, equipment reduces heating intensity or stops heating, when vapour pressure (or steam temperature) is down to set vapour pressure (steam temperature) low limit value because of defeated vapour, steam supply valve cuts out, equipment increases heating intensity immediately or starts heating ... run so circularly or work.

This method both can arrange steam storage tank or steam accumulator, also can not arrange steam storage tank or steam accumulator, saw and used the demand of vapour unit and determine, if with vapour unit steam direct heating water, can not arrange; If steadily steam need be supplied with vapour unit, then steam storage tank or steam accumulator should be set to realize steady steam supply.

Steam storage tank involved by this method or steam accumulator, relevant pipe valve, water treatment, give (benefit) water, Stress control, temperature control, Combustion System, electrical heating elements control, safety valve, blowdown, insulation and whole system electric control gear (or micro computer) all belong to prior art, at this not book.

Claims (1)

1. one kind produces the method for steam, its feature comprises combustion gas, fuel oil, burning coal powder, biomass-burning steam boiler and electric heating steam boiler or electric heating steam generator, water under the state that boiler or steam generator are closed at the steam supply valve of its steam outlet in heating kettle or steam, boiler or steam generator are at its Steam pressure control device or vapor (steam) temperature controller setting vapour pressure (or steam temperature) ceiling value, vapour pressure (or steam temperature) low limit value, when steam pressure (or vapor (steam) temperature) reaches set vapour pressure (steam temperature) ceiling value, the combustion apparatus of boiler or electrical heating elements reduce the heat energy amount of being defeated by that heats healed water or steam immediately or suspend heating, and the steam supply valve of boiler or steam generator is opened and outside delivering vapor, when steam pressure or temperature are down to set vapour pressure (steam temperature) low limit value, the steam supply valve of boiler or vapor generator cuts out through control system, combustion apparatus or electrical heating elements increase the heat energy amount of being defeated by (namely increasing heating intensity) that heats water or steam immediately or start heating immediately, when steam pressure (or steam temperature) rises vapour pressure (steam temperature) ceiling value reaching set because of heating, steam supply valve is opened and outside delivering vapor through control system again, its heater reduces again the heat energy amount of being defeated by that heats healed water or steam immediately or suspends heating ... run so circularly or work.

This method both can arrange steam storage tank or steam accumulator, also can not arrange, and saw and used the demand of vapour unit and determine, if with vapour unit this method steam heating water, can not arrange; If need balance supply steam with vapour unit, then should arrange steam storage tank or steam accumulator, this belongs to the art customary means.

Steam storage tank involved by this method or steam accumulator, relevant pipe valve, water treatment, give (benefit) water, Stress control, temperature control, Combustion System, electrical heating elements control, safety valve, blowdown, insulation and whole system electric control gear (or micro computer) all belong to prior art, at this not book.