CN104296125A - Condensate water recovering and processing system for gas-fired boiler - Google Patents
Condensate water recovering and processing system for gas-fired boiler Download PDFInfo
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- CN104296125A CN104296125A CN201410492025.8A CN201410492025A CN104296125A CN 104296125 A CN104296125 A CN 104296125A CN 201410492025 A CN201410492025 A CN 201410492025A CN 104296125 A CN104296125 A CN 104296125A
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Abstract
The invention discloses a condensate water recovering and processing system for a gas-fired boiler. The condensate water recovering and processing system is used for processing acidic condensate water generated by combustion products of the gas-fired boiler. The condensate water recovering and processing system comprises a solid object separating device and a pH value adjusting device, wherein the solid object separating device is used for separating carried solid objects from the condensate water, and the pH value adjusting device is used for improving the pH value of the condensate water to a preset level. The condensate water recovering and processing system is connected with a flue gas waste heat recovery system, processing on impurities and acid in the collected condensate water is carried out, and therefore the condensate water obtained after purification and recovery can be used for supplement water of a gas-fired boiler system and can be used for spraying and purifying to-be-condensed flue gas in a flue gas waste heat system. By means of the condensate water recovering and processing system, cycle recycling of the acidic condensate water is achieved; the condensate water recovering and processing system is operated by a controller in an auxiliary mode, full-automatic operation is carried out, and manual operation is not needed.
Description
Technical field
The present invention relates to natural gas boiler energy-conserving and emission-cutting technology field, especially relate to a kind of condensing hot air furnace treatment system for gas fired-boiler and method.
Background technology
One of capital equipment of the thermal source of heating system is gas fired-boiler.The fuel of gas fired-boiler forms primarily of hydrocarbon, containing a large amount of steam in the flue gas formed in combustion.Along with flue gas and recirculated water constantly carry out heat exchange, flue-gas temperature declines gradually, and when reaching uniform temperature, on the top layer contacted with heat exchanger tube metallic walls due to lower than dew-point temperature, the steam in flue gas will be condensed into liquid state, form condensed water.Owing to there being water-soluble nitrogen oxide in condensed water, its pH is generally less than 5, has stronger acidity.In order to avoid the condensate corrosion of boiler, exhaust gas temperature is all designed to higher than 150 DEG C when boiler design by many gas fired-boiler manufacturers, greatly can reduce the growing amount of boiler blow-down water, the service life of prolonged boiler.But simultaneously because exhaust gas temperature is too high, a large amount of heats and steam enter air along with flue gas.Through measuring and calculating, account for 11% of combustion of natural gas calorific value by the heat of smoke evacuation waste.Wherein, water vapour content has 1.5 ~ 2 tons/steaming ton every day, and the flue gas of leaving containing a large amount of steam directly enters in air, has both caused the waste of the energy, has reduced boiler efficiency, also result in atmosphere pollution simultaneously.
In view of above reason, so the waste heat recovery apparatus of heat is applied in heating system gradually in recovered flue gas, by the use of flue gas waste heat recovery equipment, that flue-gas temperature is fallen is lower.Flue gas can be reduced to less than 70 DEG C by outstanding waste heat recovery apparatus, and even some efficient waste heat recovery apparatus can accomplish that the temperature difference of flue gas and condensed water is no more than 10 DEG C.Along with the continuous reduction of flue-gas temperature, condensation water quantity is also increasing gradually, even can reach and often steam the condensed water that ton boiler can produce more than 1.5 tons every day.Condensed water is formed by water vapor condensation, and water temperature is generally at 30 DEG C ~ 50 DEG C.Due in water containing the acid ingredient such as nitric acid, nitrous acid, PH < 5, acidity is comparatively strong, directly discharges not only waste water resource but also can pollute harm.
Also there are not a set of equipment for the demand and system at present, can condensing hot air furnace solved when meeting heating system operational characteristic and it be processed.
Summary of the invention
Object of the present invention aims to provide a kind of condensing hot air furnace treatment system for gas fired-boiler, this recovery and processing system collection condensing hot air furnace, be automatically treated to one, achieve the deacidification to acid condensate water and removal of impurities process fast and efficiently.
According to an aspect of the present invention, provide a kind of condensing hot air furnace treatment system for gas fired-boiler, for processing in acid condensed water of being formed the combustion product by gas fired-boiler, comprising: solids separation device, for isolating the solids entrained by it from condensed water; With pH value adjusting device, for improving the pH value of condensed water to predeterminated level.
Further, solids separation device comprises condensing hot air furnace case, for receive condensed water from gas fired-boiler and within it with the mode of sedimentation by the solids in condensed water and condensed moisture from.
Further, solids separation device also comprises electromagnet, and it is arranged to the ferromagnetism solids that adsorption condensing water carries when condensed water enters condensing hot air furnace case; Further, condensing hot air furnace case has:
Be formed in the collecting pit in condensing hot air furnace case, be arranged to receive to collect ferromagnetism solids when electromagnet discharges the ferromagnetism solids that it adsorbs; Be formed at the settling tank in condensing hot air furnace case, for receiving condensed water and carrying out sedimentation to condensed water within it; With the water purifying tank be formed in condensing hot air furnace case, for receiving and holding the condensed water after settling tank carries out sedimentation, and export condensed water to pH value adjusting device; Alternatively, settling tank is arranged to receive the condensed water after electromagnet adsorbs.
Further, collecting pit has the first opening be open upwards, and via the ferromagnetism solids that the first opening accepts discharges from electromagnet; Settling tank has the second opening be open upwards, and the height of the second opening is lower than the height of the first opening; Water purifying tank has the 3rd opening be open upwards, and the height of the 3rd opening is lower than the height of the second opening.
Further, condensing hot air furnace case also has the first water inlet for carrying condensed water in it; Be arranged on directly over the second opening of settling tank with the first water inlet.
Further, solids separation device also comprises and is positioned at the outside and overflow pipe be communicated with collecting pit of condensing hot air furnace case.
Further, collecting pit has the clean-out door leading to condensing hot air furnace case outside; Wherein, the ferromagnetism solids collected by collecting pit can be moved apart condensing hot air furnace case via clean-out door.
Further, solids separation device also comprises the blow-off pipe being positioned at condensing hot air furnace case outside, and blow-off pipe is connected with settling tank in the bottom end of settling tank; Alternatively, blow-off pipe is also connected with water purifying tank in the bottom end of water purifying tank.
Further, pH value adjusting device comprises: condensed water treatment box, for receiving via the first condensed water path and holding the condensed water from solids separation device; PH sensor, for detecting the pH value of the condensed water in condensed water treatment box or from the discharge of condensed water treatment box; Chemicals dosing plant, for carrying the medicament of the pH value for improving condensed water in condensed water treatment box; And controller, the pH value being configured to detect according to pH sensor optionally starts or stops the conveying of chemicals dosing plant to medicament, so that the pH value of condensed water is increased to predeterminated level.
Further, pH value adjusting device also comprises: the first liquid level detector, for detecting the first condensate water level in condensed water treatment box; First controllable valve, for the first condensate water level optionally conducting or cut-out the first condensed water path detected according to the first liquid level detector; Wherein, when the first condensate water level rises to the first upper limit water level, the first controllable valve cuts off the first condensed water path; When the first condensate water level drops to the first lower limit water level, the first controllable valve conducting first condensed water path.
Further, condensing hot air furnace treatment system also comprises water storage device, and water storage device comprises: storage tank, for receive from condensed water treatment box via the second condensed water path and hold the condensed water of the pH value with predeterminated level; Second liquid level detector, for detecting the second condensate water level in storage tank; And second controllable valve, for the optionally conducting or cut off the second condensed water path of the second condensate water level of detecting according to the second liquid level detector;
Wherein, when the second condensate water level rises to the second upper limit water level, the second controllable valve cuts off the second condensed water path; When the second condensate water level drops to the second lower limit water level, the second controllable valve conducting second condensed water path.
Further, controller is also configured to only just allow chemicals dosing plant to condensed water treatment box delivery of medicaments when the second condensed water path is cut-off.
Further, the filter be arranged in the second condensed water path is also comprised, for removing iron ion; PH sensor is arranged in the second condensed water path, and is positioned at the downstream of filter.
Further, condensed water is formed in the flue gas waste heat recovery system of gas fired-boiler, and solids separation device is connected with flue gas waste heat recovery system and receives the condensed water from it.
Further, condensing hot air furnace treatment system also comprises water delivery device, for receiving the condensed water from water storage device, and under the control of the controller condensed water is delivered to moisturizing place needed for gas-fired Boiler System by water-delivery pump.
Further, condensing hot air furnace treatment system also comprises and is arranged in water-delivery pump to the purification spray equipment on the pipeline of system water supplement case, and purification spray equipment is used for the partial condensation water after by purification and sprays flue gas.
Apply technical scheme of the present invention, inventor provides a kind of condensing hot air furnace treatment system for gas fired-boiler innovatively.This recovery and processing system is connected with flue gas waste heat recovery system, impurity and acidic treatment is carried out by the condensed water collected, the condensed water after recycling is made both to have may be used for gas-fired Boiler System moisturizing, can be used for again flue gas to be condensed in spray cleaning fume afterheat system, make the water after purifying smoke again be back to condensate pipe, recycle.
Condensing hot air furnace treatment system provided by the present invention achieves the recycling of acid condensate water.Comprehensive analysis, present invention achieves following effect:
1) can by the solid impurity in acid condensate water as scum sedimentation and filtration falls;
2) neutrality or alkaline condensed water can be become by having the acid condensate water of contaminative by neutralization of acid with base;
3) the condensed water part after integrated treatment can be used for spray cleaning boiler smoke, recycles, without the need to additionally increasing water source.
4) another part condensed water after integrated treatment is delivered in system water supplement case, for heating system moisturizing, can replace softened water equipment, saves water resource.
5) system adopts controller auxiliary operation, and fully automatic operation, without the need to manual operation.
According to hereafter by reference to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will understand above-mentioned and other objects, advantage and feature of the present invention more.
Accompanying drawing explanation
Hereinafter describe specific embodiments more of the present invention with reference to the accompanying drawings by way of example, and not by way of limitation in detail.Reference numeral identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that these accompanying drawings may not be drawn in proportion.In accompanying drawing:
Fig. 1 is the structural representation of the condensing hot air furnace treatment system of gas fired-boiler according to a kind of exemplary embodiments of the present invention.
Detailed description of the invention
Fig. 1 is according to an embodiment of the invention for the schematic diagram of the condensing hot air furnace treatment system of gas fired-boiler.As shown in Figure 1, the invention provides a kind of condensing hot air furnace treatment system of gas fired-boiler, for processing in acid condensed water of being formed the combustion product by gas fired-boiler.This condensing hot air furnace treatment system can comprise solids separation device 10 and pH value adjusting device 20.Condensed water is formed in the flue gas waste heat recovery system of gas fired-boiler, and solids separation device 10 is connected with flue gas waste heat recovery system and receives the condensed water from it, for isolating the solids entrained by it from condensed water.
In an exemplary embodiments of the present invention, solids separation device 10 comprises condensing hot air furnace case 11.This condensing hot air furnace case 11 can be used for receiving condensed water from gas fired-boiler and within it with the mode of sedimentation by the solids in condensed water and condensed moisture from.Solids is herein mainly from the iron rust block in Boiler smoke tube or particle.
In the embodiment shown in Fig. 1 of the present invention, condensing hot air furnace case 11 has formation collecting pit 13 therein, settling tank 14 and water purifying tank 15 and for carrying the first water inlet 16 of condensed water in it.Collecting pit 13 has the first opening 131 be open upwards, and settling tank 14 has the second opening 141 be open upwards.First water inlet 16 is arranged on directly over the second opening 141 of settling tank 14.Electromagnet 12 be arranged in the first opening 131 top and near the first water inlet 16 position near, enter ferromagnetism solid matter contained the acid condensate water of condensing hot air furnace case 11 from the first water inlet 16 so first to be adsorbed by electromagnet 12, the acid condensate water removed after ferromagnetism solid matter enters in settling tank 14, and fine particle contained in acid condensate water within it starts slowly sedimentation.The ferromagnetism solid matter that electromagnet 12 discharges after absorption a period of time can receive via the first opening 131, and by being positioned at clean-out door 132 Hand scarf collecting pit 13 leading to condensing hot air furnace case 11 outside, thus condensing hot air furnace case 11 can be moved apart.Because the first water inlet 16 is arranged on directly over the second opening 141 of settling tank 14, such condensed water can not enter in collecting pit 13, only have the block a small amount of condensed water entrained by solid matter of part can remain in collecting pit 13, therefore can online the ferromagnetism solid matter that electromagnet 12 discharges be cleaned out.
In other unshowned embodiment of the present invention, directly over first opening 131 that the first water inlet 16 can also be arranged on collecting pit 13.And, because the height of the first opening 131 is higher than the height of the second opening 141, the height of the second opening 141 is higher than the height of the 3rd opening 151 be open upwards of water purifying tank 15, namely the open height of collecting pit 13, settling tank 14 and water purifying tank 15 reduces successively, therefore, when acid condensate water enters in condensing hot air furnace case 11 from the first water inlet 16, condensed water after electromagnet 12 adsorbs enters in collecting pit 13, when the condensed water in collecting pit 13 overflows, condensed water can flow into slowly sedimentation in settling tank 14.When the condensed water in settling tank 14 overflows, the condensed water after sedimentation will flow in water purifying tank 15, and water purifying tank 15 for receiving and holding the condensed water after settling tank 14 sedimentation, and exports condensed water to pH value adjusting device 20.
Wherein, electromagnet 12 is controlled by slagging-off control module, can by arranging the adsorption time of slagging-off control module and then controlling the content of anvil cinder in condensed water.It will be appreciated, of course, that in the embodiment of other application scenario, also by controlling other parameter, and then the solid matter content in condensed water can be controlled, as the quantity by anvil cinder in different Boiler smoke tube changes parameter etc.After absorption work completes, can make to be adsorbed on the solid matters such as the anvil cinder on electromagnet 12 by the mode of power-off and discharge at Action of Gravity Field.
In the embodiment shown in Fig. 1 of the present invention, settling tank 14 is arranged to receive and adsorbs the condensed water after ferromagnetism solid matter through electromagnet 12.In other unshowned embodiment of the present invention, also first to the acid condensate water sedimentation entered from the first water inlet 16, and then the absorption of ferromagnetism solid matter can be carried out with the condensed water after electromagnet 12 pairs of sedimentations.The position of electromagnet 12 is arranged according to actual needs flexibly.In order to prevent electromagnet 12 to be destroyed, to be generally arranged in condensing hot air furnace case 11 independently in space.
As shown in Figure 1, solids separation device 10 can also comprise the outside being arranged on condensing hot air furnace case 11 and the overflow pipe 17 be communicated with collecting pit 13.Wherein, when the condensed water in condensing hot air furnace case 11 is too much, when its water level reaches the height of the first opening 131 of collecting pit 13, condensed water enters collecting pit 13 via the first opening 131 as overfall, and be disposed to the outside of condensing hot air furnace case 11 by the overflow pipe 17 be communicated with collecting pit 13 lower end, and then achieve relief function.
As shown in Figure 1, solids separation device 10 also comprises the blow-off pipe 18 being positioned at condensing hot air furnace case 11 outside.Blow-off pipe 18 is connected with settling tank 14 in the bottom end of settling tank 14.In a preferred embodiment of the invention, as shown in Figure 1, blow-off pipe 18 is also connected with water purifying tank 15 in the bottom end of water purifying tank 15.Blow-off pipe 18 is equipped with sewage draining valve, by blow-off pipe 18, the granulated solid material precipitated in settling tank 14 and water purifying tank 15 is drained into the waste liquid tank being arranged in condensing hot air furnace case 11 outside.Similarly, when having more residue or incrustation scale in condensing hot air furnace case 11, also can pass into cleaning fluid by overflow pipe 17 in collecting pit 13, to realize the function to condensing hot air furnace case 11 internal washing.Sewage after clean also can drain into waste liquid tank by the blow-off pipe 18 being arranged in settling tank 14 or water purifying tank 15 lower end.
Due to the condensed water pH<7 that gas fired-boiler produces, acid condensate water can cause corrosion to equipment, and discharges after stain environment.Therefore, also need to arrange the pH value adjusting device 20 be connected with solids separation device 10, to adjust the pH of the acid condensate water after subsiding and purifying, make it be neutral or alkaline.Condensed water pH=10 ~ 12 after preferred adjustment, now condensed water is in causing corrosion to steam generator system.
In one embodiment of the invention, pH value adjusting device 20 also comprises condensed water treatment box 21, pH sensor 23, chemicals dosing plant 24 and controls the controller 70 of this chemicals dosing plant 24.Condensed water treatment box 21 is for receiving via the first condensed water path 22 and holding the condensed water from solids separation device 10.Condensed water treatment box 21 preferably adopts resistant material to make, and as 304 stainless steels or fiberglass, can resist acid and alkali corrosion like this.PH sensor 23 is for detecting the pH value of the condensed water in condensed water treatment box 21 or from condensed water treatment box 21 discharge.Chemicals dosing plant 24 for carrying the medicament of the pH value for improving condensed water in condensed water treatment box 21.The pH value that controller 70 can detect according to pH sensor 23 optionally starts or stops the conveying of chemicals dosing plant 24 pairs of medicaments, so that the pH value of condensed water is increased to predeterminated level.
Chemicals dosing plant 24 has for depositing the spray tank 241 of medicament as high concentration NaOH solution.Relatively more even in order to ensure the medicament sent in condensed water treatment box 21, spray tank 241 is provided with agitator 242.Chemicals dosing plant 24 also has the pH control module be integrated on controller 70.PH control module mainly contains three effects: the mixing time controlling the agitator 242 on spray tank 241, with ensure the even concentration of conveying alkali lye; Tested the pH value arrived by pH sensor 23, fed back to controller, and then control the dosing pump 243 that is arranged on chemicals dosing plant 24 export pipeline by drug delivery to condensed water treatment box 21.
By controlling start and stop and the running frequency of dosing pump 243, thus regulate and control the pH of condensed water in condensed water treatment box 21.As the first setting value of preset pH in pH control module, when pH sensor 23 detects that the condensed water pH value that condensed water treatment box 21 flows out is less than setting value, fed back to controller 70, and then control dosing pump 243 starts, delivery of medicaments in condensed water treatment box 21.Along with medicament enters condensed water treatment box 21, in condensed water treatment box 21, liquid pH constantly raises, until its pH reaches setting value, dosing pump 243 stops.Wherein, controller 70 is also configured to only just allow chemicals dosing plant 24 to condensed water treatment box 21 delivery of medicaments when the second condensed water path 32 is cut-off." permission " herein refers to when the second condensed water path 32 is cut off, just possesses the condition of delivery of medicaments in condensed water treatment box 21, this Time Controller 70 can control chemicals dosing plant 24 to condensed water treatment box 21 delivery of medicaments, also can not to delivery of medicaments in condensed water treatment box 21, this will determine according to the pH value of condensed water in condensed water treatment box 21.
Particularly, pH value adjusting device 20 also comprises the first liquid level detector 25 and the first controllable valve 26.First controllable valve 26 is arranged on the first condensed water path 22.First liquid level detector 25 may be used for detecting the first condensate water level in condensed water treatment box 21, and testing result is sent to the first controllable valve 26.The first condensate water level optionally conducting or cut-out the first condensed water path 22 that first controllable valve 26 detects according to the first liquid level detector 25.Preferably, the first liquid level detector 25 can be ball-cock assembly.Wherein, the outside of condensed water treatment box 21 also has the first condensate water level graduation mark 29, can show the water level height of the first condensed water in condensed water treatment box 21.When the first condensate water level rises to the first upper limit water level, the first controllable valve 26 automatically cuts off the first condensed water path 22.When the first condensate water level drops to the first lower limit water level, the first controllable valve 26 is conducting first condensed water path 22 automatically.Preferably, pH value adjusting device 20 also comprises second controllable valve 28 of connecting with the first controllable valve 26.Second controllable valve 28 is in opening time flat, and its effect is when automatic valve breaks down, can this second controllable valve 28 of manual-lock, avoids acid condensate water to enter condensed water treatment box 21, waste medicament.
Because acid condensate water and metallic iron react, containing part iron ion in the condensed water after thus causing pH to adjust.Consider that iron ion can separate out fouling under localized hyperthermia, therefore need the iron ion removing in condensed water.In a preferred embodiment of the invention, as shown in Figure 1, also comprise the filter 27 be arranged in the second condensed water path 32, for filtering the condensed water after pH adjustment, to adsorb after ferrous ions oxidation, and then remove the iron ion in condensed water.Particularly, pH sensor 23 is arranged in the second condensed water path 32, and is positioned at the downstream of filter 27.
In a preferred embodiment of the invention, the condensing hot air furnace treatment system for gas fired-boiler also comprises water storage device 30.This water storage device 30 comprises storage tank 31, second liquid level detector 331 and the second controllable valve 34.Wherein, storage tank 31 is for receive from condensed water treatment box 21 via the second condensed water path 32 and hold the condensed water of the pH value with predeterminated level.It is inner that second liquid level detector 331 is arranged on storage tank 31, for showing the second condensate water level.As shown in Figure 1, the second liquid level detector 331 is preferably ball-cock assembly.Second controllable valve 34 is connected with the second liquid level detector 331, second condensate water level optionally conducting or the cut-out second condensed water path 32 of the second controllable valve 34 for detecting according to the second liquid level detector 331.
When the second condensate water level that the second liquid level detector 331 shows in storage tank 31 rises to the second upper limit water level, the second coupled controllable valve 34 cuts off the second condensed water path 32, and condensed water stops entering storage tank 31.Simultaneously, be positioned at the 3rd liquid level detector 332 below the second liquid level detector 331, it is connected with the by-pass valve control of water-delivery pump 41, when the second condensate water level that the 3rd liquid level detector 332 shows in storage tank 31 rises to the second upper limit water level, and the by-pass valve control conducting of water-delivery pump 41.When the second condensate water level drops to the second lower limit water level, the second controllable valve 34 conducting second condensed water path 32.Meanwhile, the by-pass valve control of the water-delivery pump 41 be connected with the 3rd liquid level detector 332 cuts off.In addition, the outside of storage tank 31 also has the level scale line 35 of display second condensed water.
In an exemplary embodiments of the present invention, condensing hot air furnace treatment system also comprises water delivery device 40.Condensed water after purification for receiving the condensed water from water storage device 30, and is delivered to moisturizing place needed for gas-fired Boiler System by water-delivery pump 41 by this water delivery device 40 under a control of the controller 70, can substitute original system moisturizing when the water yield is enough.In order to control carrying capacity more accurately, in controller 70, input signal is the water level of system water supplement case, outputs signal the variable frequency starting signal into water-delivery pump 41 and frequency thereof.The Main Function of water delivery device 40 is for original system water supply tank provides the demineralized water of system consumption.
In another embodiment of the present invention, condensing hot air furnace treatment system also comprises the purification spray equipment 60 on the pipeline being arranged in water-delivery pump 41 to system water supplement case, the partial condensation water after purification can be used for flue gas spray.The condensed water be about to after process sprays in flue after purifying smoke, is back in solids separation device 10 recycles by condensate pipe.
Present invention also offers a kind of condensing hot air furnace processing method for gas fired-boiler, comprise the following steps: the condensed water solid after flue gas waste heat recovery is separated to remove solid matter; PH adjustment is carried out to the condensed water after solid separating treatment, reaches predeterminated level to make it; Filtration treatment is carried out to the condensed water after pH adjustment, to remove iron ion contained in condensed water, the condensed water after being purified; And the condensed water after purification is delivered to moisturizing place needed for system.Condensing hot air furnace processing method provided by the present invention only needs the condensed water after to flue gas waste heat recovery carry out solids Solid state fermentation, pH adjustment and filter steps such as removing iron ion, the condensed water that can reuse after just can being purified.This processing method technique is simple, and cost is low, is suitable for applying in industrial combustion gas boiler.
Below in conjunction with Fig. 1, the condensing hot air furnace processing method of gas fired-boiler is described in detail.
By the acid condensate water flowed out after flue gas waste heat recovery system, carry the iron rust in Boiler smoke tube or unburnt carbon granule, flowed in condensing hot air furnace case 11 by the first water inlet 16 of condensing hot air furnace case 11 together.First, the acid condensate water entering condensing hot air furnace case 11 be positioned at the electromagnet 12 at the first water inlet 16 place adsorb, by absorption with solid matters such as the iron rust contained by removing in condensed water.Wherein electromagnet 12 is controlled by slagging-off control module, and slagging-off control module is integrated in controller 70.Power-off after certain hour upon adsorption, electromagnet 12 discharges adsorbent solid, and solid matter is fallen in the collecting pit 13 of below under gravity.Collecting pit 13 has the clean-out door 132 leading to condensing hot air furnace case 11 outside, can be removed by ferromagnetism solid matter online like this, thus realizes the object removing solid matter in condensed water.
The condensed water removed after magnetic retention material enters in settling tank 14, under gravity sedimentation further, to remove nonmetallic inclusion as unburnt carbon granule etc.Condensed water after sedimentation enters in water purifying tank 15, processes further to be delivered to pH value adjusting device 20.
When the first liquid level detector 25 (as ball-cock assembly) the first condensate water level shown in condensed water treatment box 21 drops in limited time, the first controllable valve 26 be connected with the first liquid level detector 25 is opened.The condensed water removed after solid matter enters condensed water treatment box 21 by the first condensed water path 22, along with the water level in condensed water treatment box 21 rises gradually, until the first liquid level detector 25 (as ball-cock assembly) shows its water level rise to the upper limit, then the first controllable valve 26 cuts off automatically, stops water inlet.Along with entering of condensed water, in condensed water treatment box 21, the pH value of condensed water reduces gradually, when the pH sensor 23 on the outlet pipe be communicated with condensed water treatment box 21 detects that the pH value of condensed water is less than setting value preset in pH control module, then the pH data of the condensed water detected are passed to pH control module.PH control module outputs signal to controller 70, and controller 70 starts chemicals dosing plant 24, is sent in condensed water treatment box 21 by medicament like this by dosing pump 243.
Along with medicament constantly inputs, the pH value of the condensed water in condensed water treatment box 21 rises gradually, until pH meets setting value requirement, condensed water pH regulates and is disposed, and enters stand-by state.Meanwhile, condensed water is also constantly entered in condensed water treatment box 21 by the first condensed water path 22.Condensed water enters and to enter condensed water treatment box with liquid and be two and independently control, and is independent of each other.The first condensate water level detected in condensed water treatment box 21 when the first liquid level detector 25 reaches in limited time, and the first controllable valve 26 cuts off the first condensed water path 22, stops water inlet.PH value now in condensed water treatment box 21 reaches minimum.Enter in the process of condensed water treatment box 21 at whole condensed water or medicament, the second condensed water path 32 is in dissengaged positions.
Water level in the storage tank 31 of water storage device 30 constantly declines due to system water supplement, when the second liquid level detector 331 detects that its water level decreasing is prescribed a time limit to lower, second controllable valve 34 conducting of storage tank 31, the condensed water after pH is adjusted to predeterminated level and device 27 removes iron ion after filtration enters in storage tank 31 under hydraulic pressure effect.The water level of storage tank 31 rises gradually, until reach its water level upper limit, the second controllable valve 34 on the second condensed water path 32 cuts off, and water inlet stops.
When system needs moisturizing or process requirements condensed water, by being integrated into the water pump control modules output signal on controller 70, start the water-delivery pump 41 of water delivery device 40, the condensed water in storage tank 31 is flowed to moisturizing place needed for system, completes whole condensing hot air furnace process and utilize process.In whole processing procedure, chemicals dosing plant 24 moment is in for subsequent use or using state, and the agitator 242 in spray tank 241 is being integrated under the pH control module on controller 70 controls, timing agitation, ensures that liquid is evenly and without precipitation with the moment.
The all processes of whole process carries out under the monitor and forecast of controller 70, and controller 70 is made up of time controller, pH control module, water pump control modules, input, output control module, solid matter slagging-off control module, information storage module and information display module.The mixing time of agitator 242 and the time interval of stirring in the conduction time of time controller major control electromagnet 12 and chemicals dosing plant 24, the start and stop of pH controller major control dosing pump 243, information acquisition module mainly carries out pH information and user's request information gathering, the start and stop of water delivery control module major control water-delivery pump, information storage module mainly carries out the storage of various historical data, and information display module Main Function is shown the state at each composition position.
So far, those skilled in the art will recognize that, although multiple exemplary embodiment of the present invention is illustrate and described herein detailed, but, without departing from the spirit and scope of the present invention, still can directly determine or derive other modification many or amendment of meeting the principle of the invention according to content disclosed by the invention.Therefore, scope of the present invention should be understood and regard as and cover all these other modification or amendments.
Claims (13)
1., for a condensing hot air furnace treatment system for gas fired-boiler, for processing in acid condensed water of being formed the combustion product by described gas fired-boiler, comprising:
Solids separation device (10), for isolating the solids entrained by it from described condensed water; With
PH value adjusting device (20), for improving the pH value of described condensed water to predeterminated level.
2. condensing hot air furnace treatment system according to claim 1, wherein, described solids separation device (10) comprises condensing hot air furnace case (11), for receive described condensed water from described gas fired-boiler and within it with the mode of sedimentation by the described solids in described condensed water and described condensed moisture from.
3. condensing hot air furnace treatment system according to claim 2, wherein, described solids separation device (10) also comprises electromagnet (12), and it is arranged to adsorb when described condensed water enters described condensing hot air furnace case (11) the ferromagnetism solids that described condensed water carries; Further,
Described condensing hot air furnace case (11) has:
Be formed in the collecting pit (13) in described condensing hot air furnace case (11), be arranged to receive to collect described ferromagnetism solids when described electromagnet (12) discharges the described ferromagnetism solids that it adsorbs;
Be formed at the settling tank (14) in described condensing hot air furnace case (11), for receiving described condensed water and carrying out described sedimentation to described condensed water within it; With
Be formed at the water purifying tank (15) in described condensing hot air furnace case (11), carry out the described condensed water after described sedimentation for reception and accommodation through described settling tank (14), and described condensed water is exported to described pH value adjusting device (20);
Alternatively, described settling tank (14) is arranged to receive the described condensed water carrying out after described absorption through described electromagnet (12).
4. condensing hot air furnace treatment system according to claim 3, wherein, described collecting pit (13) has the first opening (131) be open upwards, and receives the described ferromagnetism solids of release from described electromagnet (12) via described first opening (131);
Described settling tank (14) has the second opening (141) be open upwards, and the height of described second opening (141) is lower than the height of described first opening (131);
Described water purifying tank (15) has the 3rd opening (151) be open upwards, and the height of described 3rd opening (151) is lower than the height of described second opening (141).
5. condensing hot air furnace treatment system according to claim 4, wherein, described condensing hot air furnace case (11) also has the first water inlet (16) for carrying described condensed water in it, further, described first water inlet (16) is arranged on directly over described second opening (141) of described settling tank (14).
6. the condensing hot air furnace treatment system according to any one of claim 3-5, wherein, described solids separation device (10) also comprises and is positioned at the outside and overflow pipe (17) be communicated with described collecting pit (13) of described condensing hot air furnace case (11).
7. the condensing hot air furnace treatment system according to any one of claim 3-6, wherein, described collecting pit (13) has the clean-out door (132) leading to described condensing hot air furnace case (11) outside; Wherein, the described ferromagnetism solids collected by described collecting pit (13) can be moved apart described condensing hot air furnace case (11) via described clean-out door (132).
8. the condensing hot air furnace treatment system according to any one of claim 3-7, wherein, described solids separation device (10) also comprises the blow-off pipe (18) being positioned at described condensing hot air furnace case (11) outside, and described blow-off pipe (18) is connected with described settling tank (14) in the bottom end of described settling tank (14);
Alternatively, described blow-off pipe (18) is also connected with described water purifying tank (15) in the bottom end of described water purifying tank (15).
9. the condensing hot air furnace treatment system according to any one of claim 1-8, wherein, described pH value adjusting device (20) comprising:
Condensed water treatment box (21), for receiving via the first condensed water path (22) and holding the described condensed water from described solids separation device (10);
PH sensor (23), for the pH value of described condensed water detected in described condensed water treatment box (21) or discharge from described condensed water treatment box (21);
Chemicals dosing plant (24), for conveying in described condensed water treatment box (21) for improving the medicament of the pH value of described condensed water; With
Controller (70), the described pH value being configured to detect according to described pH sensor (23) optionally starts or stops described chemicals dosing plant (24) to the conveying of described medicament, so that the pH value of described condensed water is increased to described predeterminated level.
10. condensing hot air furnace treatment system according to claim 9, wherein, described pH value adjusting device (20) also comprises:
First liquid level detector (25), for detecting the first condensate water level in described condensed water treatment box (21);
First controllable valve (26), for the optionally conducting or cut off described first condensed water path (22) of described first condensate water level that detects according to described first liquid level detector (25);
Wherein, when described first condensate water level rises to the first upper limit water level, described first controllable valve (26) cuts off described first condensed water path (22); When described first condensate water level drops to the first lower limit water level, the first condensed water path (22) described in the conducting of described first controllable valve (26).
11. condensing hot air furnace treatment systems according to any one of claim 9-10, wherein, also comprise water storage device (30), described water storage device (30) comprising:
Storage tank (31), for receive from described condensed water treatment box (21) via the second condensed water path (32) and hold the described condensed water of the pH value with described predeterminated level;
Second liquid level detector (331), for detecting the second condensate water level in described storage tank (31); And
Second controllable valve (34), for the optionally conducting or cut off described second condensed water path (32) of described second condensate water level that detects according to described second liquid level detector (331);
Wherein, when described second condensate water level rises to the second upper limit water level, described second controllable valve (34) cuts off described second condensed water path (32); When described second condensate water level drops to the second lower limit water level, the second condensed water path (32) described in the conducting of described second controllable valve (34).
12. condensing hot air furnace treatment systems according to claim 11, wherein, described controller (70) is also configured to only just allow described chemicals dosing plant (24) to carry described medicament to described condensed water treatment box (21) when described second condensed water path (32) is cut-off.
13. condensing hot air furnace treatment systems according to any one of claim 11-12, wherein,
Also comprise the filter (27) be arranged in described second condensed water path (32), for removing iron ion;
Described pH sensor (23) is arranged in described second condensed water path (32), and is positioned at the downstream of described filter (27).
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| CN109336294A (en) * | 2018-11-28 | 2019-02-15 | 北京国电龙源环保工程有限公司 | Inexpensive flue gas condensing water treatment facilities |
| CN111389042A (en) * | 2020-03-16 | 2020-07-10 | 苏州乔发环保科技股份有限公司 | Multistage condensing system |
| CN113455694A (en) * | 2021-07-06 | 2021-10-01 | 河南卷烟工业烟草薄片有限公司 | System for recycling condensed water generated by concentrating, evaporating and reusing reconstituted tobacco by papermaking method |
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