CN210688252U - Double-fluid furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in furnace - Google Patents
Double-fluid furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in furnace Download PDFInfo
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- CN210688252U CN210688252U CN201921467533.5U CN201921467533U CN210688252U CN 210688252 U CN210688252 U CN 210688252U CN 201921467533 U CN201921467533 U CN 201921467533U CN 210688252 U CN210688252 U CN 210688252U
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Abstract
The utility model discloses a can reduce two fluids of interior nitrogen oxide concentration of stove go into stove and return system of spouting can not only solve the problem that waste incineration power plant filtration liquid and concentrate treatment cost are high, the degree of difficulty is big, the technology is complicated, more importantly reduces nitrogen oxide's content in the waste incineration flue gas through this two fluids system of spouting source of returning, improves SNCR denitration efficiency. The utility model discloses an atomizing spray gun, mixed liquid conveyer pipe, mixing tank, landfill leachate conveyer pipe, concentrate conveyer pipe, force (forcing) pump, one-level filter, row's sediment oil removal groove and second grade filter are equipped with the DTRO membrane post that is used for concentrate reconcentration in it on the concentrate conveyer pipe. The utility model has the advantages of simple structure and scientific and reasonable design, convenient to use not only is high-efficient, swift, stable, the operation low cost and safety ring of operation to refuse disposal filtration liquid and concentrate, can reduce the interior nitrogen oxide concentration of stove moreover.
Description
Technical Field
The utility model relates to a double-fluid furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in a furnace.
Background
The nitrogen oxide is one of main gaseous pollutants in the waste incineration process and is derived from the thermal decomposition and oxidation of nitrogen-containing compounds in the waste and the high-temperature oxidation of nitrogen in the air in the waste incineration process. The emission of nitrogen oxides into the atmosphere forms toxic photochemical smog, and also destroys the ozone layer, participating in the formation of acid rain. Therefore, nitrogen oxides generated in the waste incineration process must be controlled and can be discharged after meeting relevant discharge standards. At present, the emission of nitrogen oxides in the flue gas of most waste incineration power plants in China executes European Union 2000 emission standard and even local total amount control standard strict with the European Union 2000 standard. In order to meet the requirements of the flue gas emission standard, in a waste incineration power plant, the removal of nitrogen oxides in flue gas adopts a flue gas denitration process combining denitration in an SNCR furnace and denitration by SCR. The denitration in the SNCR furnace is to spray ammonia water or urea solution into the first flue of the waste incineration boiler, the nitrogen oxides in the flue gas are reduced by utilizing the reducibility of ammonia, and the nitrogen oxides are subjected to reduction reaction to generate harmless nitrogen and are discharged, so that the aim of denitration is fulfilled. Because the SNCR denitration efficiency in the industry can only reach 40% -50%, in order to meet the current increasingly strict flue gas emission standard, the SCR denitration technology is also needed to further remove nitrogen oxides in flue gas. The SCR process is arranged behind a bag-type dust remover, an expensive vanadium-titanium rare metal catalyst is needed to be used in an SCR reactor, the reaction temperature is generally 200-230 ℃, however, the temperature of the flue gas passing through the bag-type dust remover is only about 150 ℃, the flue gas needs to be heated to 200-230 ℃ by an energy source before entering the SCR reactor, and then the SCR denitration reaction can be carried out. Therefore, the SCR process is very expensive to operate, and the SCR process of many waste incineration power plants is only a standby supplementary measure. If proper measures can be taken to reduce the generation amount of nitrogen oxides in the flue gas or improve the denitration efficiency in the SNCR furnace in the waste incineration process, the nitrogen oxides in the flue gas can be ensured to meet the requirement of emission standard without a subsequent SCR denitration process, and the operation cost of flue gas denitration can be greatly reduced.
Garbage in a garbage storage pit of a garbage incineration power plant is fermented to generate 15-30% of garbage leachate. In order to increase the calorific value of the garbage fed into the furnace, the household garbage fed into the garbage incineration power plant needs to be fermented in a garbage storage pit for 3-7 days, and the water is drained under the decomposition action of microorganisms. The drained water is the landfill leachate. The landfill leachate is high-concentration organic wastewater, contains various harmful organic matters, heavy metals and the like, has COD (chemical oxygen demand) and ammonia nitrogen concentration far higher than those of urban sewage, has strong foul smell, and causes secondary pollution to the environment if not properly treated. Therefore, it is necessary to perform a harmless treatment. A plurality of waste incineration power plants are matched with a waste leachate treatment station, and the waste leachate is treated by adopting the more mainstream pretreatment + anaerobism + MBR + NF/RO process in the industry. The operating cost of the landfill leachate treatment station is very high due to the high concentration and high salinity of the organic pollutants in the landfill leachate; compared with domestic sewage, the landfill leachate treatment difficulty is high, and the treatment process flow is long. In the rainy season in summer and in the rainy season in the southern area of China, the production amount of the landfill leachate of the waste incineration power plant sometimes exceeds 30 percent and exceeds the processing capacity of a matched landfill leachate processing station.
Meanwhile, as the landfill leachate treatment station matched with the waste incineration power plant adopts the mainstream pretreatment + anaerobism + MBR + NF/RO process in the industry for landfill leachate treatment, and the NF/RO process unit is a membrane separation process, about 20-30% of post-membrane concentrated solution can be generated. The concentrated solution contains a large amount of organic matters and salt which are difficult to biochemically degrade and can not biochemically degrade, and the biodegradability is very poor; especially RO concentrate, contains a high concentration of monovalent salts. Therefore, the treatment difficulty of the membrane concentrated solution (hereinafter referred to as concentrated solution) of the landfill leachate is more difficult than that of the landfill leachate stock solution. With the current environmental protection standard and environmental protection scrutiny in China becoming stricter, many waste incineration power plants require to execute the 'zero emission' standard, that is, the generated concentrated solution needs to be completely treated and consumed in the waste incineration power plants and is not discharged. Proper treatment of the concentrated solution also becomes a common problem in the industry, and methods for treating the concentrated solution in the industry comprise an evaporation method, an advanced oxidation method and the like. The evaporation method and the advanced oxidation method have a plurality of technical bottlenecks: the evaporation method has the defects of easy scaling of equipment, high operation and maintenance difficulty, poor operation stability and high operation cost; the advanced oxidation method is not suitable for treating RO concentrate containing a high concentration of monovalent salt and is expensive to operate.
Therefore, the utility model discloses a can reduce two fluids of interior nitrogen oxide concentration of stove and go into stove and return system of spouting makes it become one set of high efficiency, swift, stable, the operation low cost and safe environmental protection's return system of spouting in order to absorb the concentrate to when rainy season flood season landfill leachate is excessive, this system can regard as the supplementary backup measure of emergent surplus landfill leachate of absorption. More importantly, the generation amount of flue gas pollutants-nitrogen oxides in the waste incineration process can be reduced from the source, the operation condition of denitration in the SNCR furnace is optimized to improve the flue gas denitration effect, the concentration of the nitrogen oxides in the furnace is finally reduced, and the operation cost of flue gas denitration is saved. The concentrated solution or the garbage percolate is properly sprayed back to the garbage incineration hearth for high-temperature oxidation treatment, and the method has the advantages of simple process, low one-time investment, low operation and maintenance cost, quick treatment, good safety and environmental protection effects and the like. Meanwhile, the concentrated solution is properly sprayed back to the waste incineration furnace chamber after being subjected to high-pressure membrane decrement for high-temperature oxidation treatment and digestion, the method has the advantages of simple process, low one-time investment, low operation and maintenance cost, thorough harmless treatment effect on the concentrated solution and the like, is an effective supplement standby system for realizing zero emission of the concentrated solution, can optimize the operation working condition of an incineration system and the operation working condition of a denitration system in an SNCR furnace by properly spraying back the waste incineration furnace chamber, and can promote the formation of flow field distribution and temperature field distribution for inhibiting the generation of thermal fuel type nitrogen oxides and facilitating the SNCR denitration reaction in the furnace. The concentration of nitrogen oxides in the furnace in the waste incineration process is reduced, and the consumption of denitration ammonia water or urea in the furnace is saved.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the utility model provides a can reduce two fluid income stove of interior nitrogen oxide concentration and return system of spouting not only can solve the supporting leachate treatment station of current waste incineration power plant and handle landfill leachate and concentrate problem with high costs, the degree of difficulty is big, the long problem of process flow, through this two fluid return system optimization waste incineration system operating mode, the source reduces the production of nitrogen oxide in the burning flue gas to improve flue gas denitration efficiency, reduce the treatment cost to nitrogen oxide in the flue gas.
In order to achieve the above object, the utility model adopts the following technical scheme:
a double-fluid furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in a furnace comprises an atomizing spray gun arranged at the upper part of an air cooling wall of a garbage incineration furnace chamber and in a secondary air upper layer high-temperature flame area, a mixed liquid conveying pipe connected with the atomizing spray gun and used for conveying mixed liquid of garbage percolate and garbage concentrated liquid for the atomizing spray gun, a mixing tank connected with the free end of the mixed liquid conveying pipe, a garbage percolate conveying pipe respectively connected with the mixing tank and used for conveying garbage percolate for the mixing tank, and a concentrated liquid conveying pipe used for conveying garbage concentrated liquid for the mixing tank;
the mixed liquor conveying pipe is provided with a pressure pump, the liquid inlet end of the landfill leachate conveying pipe is connected with a landfill leachate source so as to convey landfill leachate in the landfill leachate source to the mixing tank, the landfill leachate conveying pipe is sequentially provided with a primary filter, a slag discharge oil separation tank and a secondary filter along the liquid flowing direction, the liquid inlet end of the concentrated liquor conveying pipe is connected with the liquid outlet end of an NF/RO process unit in landfill leachate treatment equipment, and the concentrated liquor conveying pipe is provided with a DTRO membrane column for concentrating concentrated liquor in the concentrated liquor conveying pipe again.
Further, the pipe diameter ratio of the landfill leachate conveying pipe to the concentrated solution conveying pipe is 1:3, and the flow rates of the liquid in the landfill leachate conveying pipe and the concentrated solution conveying pipe are the same. The material of the pipeline in the garbage percolate conveying pipe, which enters the front 2 meters of the garbage incineration hearth, and the material of the pipeline which enters the garbage incineration hearth are both 1Cr18Ni9Ti, so that high-temperature corrosion can be prevented; and the rest pipelines in the landfill leachate conveying pipe are made of HDPE solid-wall pipes.
Further, arrange the sediment and separate the oil groove main part including arranging the sediment that is inverted circular truncated cone shape, arrange the sediment and separate one side upper portion and the opposite side lower part of oil groove main part and be equipped with inlet and liquid outlet respectively, arrange the sediment and separate the oil groove main part and insert through its inlet and liquid outlet on the landfill leachate conveyer pipe, arrange the sediment and separate the upper portion and the bottom of oil groove main part and be equipped with oil drain port and row's sediment mouth respectively, and the oil drain port is located on vertical direction the top of inlet.
Further, the mixing tank is including the mixing tank main part that is inverted circular truncated cone shape, one side upper portion and the opposite side lower part of mixing tank main part are equipped with mixing tank inlet and mixing tank liquid outlet respectively, landfill leachate conveyer pipe with the concentrate conveyer pipe respectively with the mixing tank inlet is connected, mixed liquid conveyer pipe with the mixing tank liquid outlet is connected, the upper portion and the bottom of mixing tank main part are equipped with mixing tank oil drain port and mixing tank row cinder notch respectively, and the mixing tank oil drain port is located on vertical direction the top of mixing tank inlet.
Furthermore, the atomizing spray gun is a compressed air atomizing spray gun, and the pressure of compressed air of the compressed air atomizing spray gun is 0.4-0.5 MPa.
Further, the primary filter is a grating filter.
Further, the secondary filter is a self-cleaning filter.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model has the advantages of simple structure and scientific and reasonable design, convenient to use, when to handle landfill leachate and concentrate, high-efficient, swift, stable, operation low cost and safety ring protects, and the treatment method is simple, invests in for a short time, and the operation maintenance cost is low, and is swift to landfill leachate's processing, safety ring protects effectually.
The utility model discloses a landfill leachate returns integration of spouting pipeline and concentrate return spray pipe way can realize suitably returning to and spouts msw incineration furnace to landfill leachate and concentrate to exert advantages such as optimize the burning system operating mode behind the appropriate back-spray msw incineration furnace of landfill leachate and concentrate, practice thrift denitration ammonia water consumption in the stove. The system is a set of efficient, quick, stable, safe and environment-friendly supplementary standby treatment system with low operation cost, can consume surplus landfill leachate and concentrated solution, and can realize zero discharge of waste water of a waste incineration power plant. The utility model is suitable for a return with filtration liquid and the concentrate of the supporting landfill leachate treatment station of msw incineration power plant and spout to waste incinerator to as the reserve safeguard measure of supplementary of processing landfill leachate and concentrate, can effectively satisfy current relevant environmental protection supervision policy of china to the increasingly strict environmental protection requirement of msw incineration power plant.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure schematic diagram of the slag discharging and oil separating tank of the utility model.
Fig. 3 is a schematic view of the structure of the mixing tank of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-atomizing spray gun, 2-mixed liquid conveying pipe, 3-mixing tank, 4-landfill leachate conveying pipe, 5-concentrated liquid conveying pipe, 6-pressure pump, 7-primary filter, 8-deslagging oil separating tank, 9-secondary filter, 10-DTRO membrane column, 31-mixing tank main body, 32-mixing tank oil drain port, 33-mixing tank deslagging port, 34-mixing tank liquid inlet, 35-mixing tank liquid outlet, 81-deslagging oil separating tank main body, 82-oil drain port, 83-deslagging port, 84-liquid inlet and 85-liquid outlet.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
As shown in figures 1-3, the utility model provides a pair of can reduce two fluid income stove of interior nitrogen oxide concentration and return system of spouting, simple structure, design scientific and reasonable, convenient to use, when to processing landfill leachate and concentrate, high-efficient, swift, stable, operation low cost and safety ring protects, and the treatment methods is simple, and the investment is little, and the operation maintenance cost is low, and is swift, safety ring protects effectually to landfill leachate's processing. The utility model discloses a locate the regional atomizing spray gun 1 of msw incineration furnace air-cooled wall upper portion, overgrate air high temperature flame, with atomizing spray gun 1 be connected be used for doing atomizing spray gun 1 carries mixed liquid conveyer pipe 2 that landfill leachate and rubbish concentrate mixed the liquid, with the mixing tank 3 that the free end of mixed liquid conveyer pipe 2 is connected, respectively with mixing tank 3 be connected be used for doing 3 landfill leachate conveyer pipes 4 that carry landfill leachate and be used for doing 3 concentrated solution conveyer pipes 5 that carry the rubbish concentrate of mixing tank. The pipe diameter ratio of the landfill leachate conveying pipe 4 to the concentrated solution conveying pipe 5 is 10: 2-3, and the flow rates of liquid in the landfill leachate conveying pipe 4 and the concentrated solution conveying pipe 5 are the same. The atomizing spray gun 1 is a compressed air atomizing spray gun, and the pressure of compressed air of the compressed air atomizing spray gun is 0.4-0.5 MPa. The material of the pipeline in the garbage percolate conveying pipe 4, which enters the front 2 meters of the garbage incineration furnace chamber and the material of the pipeline which enters the garbage incineration furnace chamber are both 1Cr18Ni9Ti, so that high-temperature corrosion can be prevented; the material of the rest of the pipelines in the landfill leachate conveying pipe 4 is HDPE solid-wall pipe.
Mix and be equipped with force (forcing) pump 6 on the liquid conveyer pipe 2, landfill leachate conveyer pipe 4's feed liquor end is connected with the landfill leachate source and carries extremely with the landfill leachate in the landfill leachate source mixing tank 3, be equipped with one-level filter 7, arrange the sediment in proper order along its liquid flow direction on the landfill leachate conveyer pipe 4 and separate oil groove 8 and secondary filter 9, the feed liquor end of concentrate conveyer pipe 5 is connected with the play liquid end of NF RO process unit in the landfill leachate treatment facility, be equipped with on the concentrate conveyer pipe 5 and be used for the DTRO membrane column 10 concentrated in it once more, one-level filter 7 is the grid filter, secondary filter 9 is the self-cleaning filter.
Arrange sediment and separate oil groove 8 and separate oil groove main part 81 including the sediment of being inverted circular truncated cone shape, arrange sediment and separate one side upper portion and the opposite side lower part of oil groove main part 81 and be equipped with inlet 84 and liquid outlet 85 respectively, arrange sediment and separate oil groove main part 81 and insert through its inlet 84 and liquid outlet 85 on the landfill leachate conveyer pipe 4, arrange sediment and separate the upper portion and the bottom of oil groove main part 81 and be equipped with oil drain port 82 and slag drain port 83 respectively, and oil drain port 82 is located on vertical direction the top of inlet.
The utility model discloses a landfill leachate returns integration of spouting pipeline and concentrate return spray pipe way can realize suitably returning to and spouts msw incineration furnace to landfill leachate and concentrate to exert advantages such as optimize the burning system operating mode behind the appropriate back-spray msw incineration furnace of landfill leachate and concentrate, practice thrift denitration ammonia water consumption in the stove. The system is a set of efficient, quick, stable, safe and environment-friendly supplementary standby treatment system with low operation cost, can consume surplus landfill leachate and concentrated solution, and can realize zero discharge of waste water of a waste incineration power plant. The utility model is suitable for a return with filtration liquid and the concentrate of the supporting landfill leachate treatment station of msw incineration power plant and spout to waste incinerator to as the reserve safeguard measure of supplementary of processing landfill leachate and concentrate, can effectively satisfy current relevant environmental protection supervision policy of china to the increasingly strict environmental protection requirement of msw incineration power plant.
The utility model discloses when the operation, because landfill leachate composition is complicated, contain suspended solid and oil content. Therefore, a primary filter, a slag discharge oil separation tank and a secondary filter are arranged on the landfill leachate conveying pipe. Wherein, the slag discharge oil separation groove is designed for oil separation on the surface of the groove and slag discharge through sediment at the bottom. On one hand, the oil content and the suspended impurities of the landfill leachate can be isolated, so that the oil content and the impurities can be removed out of the system in time, the smoothness of a mixed liquid conveying pipe and an atomization spray gun is facilitated, and the long-period stable operation of the system is ensured. On the other hand, the atomizing spray gun is the last key component of this system, because the atomizing spray gun head is deep into in the msw incineration furnace, the oil content that landfill leachate contains can produce tar at the atomizing spray gun head under the high temperature effect in furnace, and long-term operation can cause the condition that the spray gun head produced the jam like this, influences the atomizing and spouts the effect again. The system can isolate oil content and suspended impurities of the landfill leachate, not only can avoid the atomization spray gun from being blocked by impurities, but also can avoid being blocked by tar, and ensures good atomization effect.
When the utility model is operated, the garbage concentrated solution accounts for about 20% -30% of the garbage leachate, and especially the RO concentrated solution has low heat value. If the amount of the concentrate in the back-spraying garbage incineration furnace is too much, the adverse effect on the working condition of the garbage incineration system is avoided. The concentrated solution generated by a garbage leachate treatment station matched with a garbage incineration plant is guaranteed to be completely consumed by the garbage incinerator, so that zero emission of the garbage incineration plant is realized; but also ensures that the concentrated solution sprayed back into the waste incineration hearth is as little as possible; a high-pressure DTRO membrane decrement system is arranged on a concentrated solution conveying pipe of the system, and concentrated solution can be re-concentrated by 50% after passing through the high-pressure DTRO membrane, namely, 50% decrement is carried out to obtain re-concentrated solution. The design greatly reduces the amount of the concentrated solution which needs to be sprayed into the waste incineration hearth, and does not influence the operation condition of the incineration system on the basis of ensuring the zero emission of the concentrated solution of the waste incineration plant.
The utility model discloses when the operation, the back is mixed at the mixing tank to landfill leachate in the landfill leachate conveyer pipe and the concentrate in the concentrate conveyer pipe, and the mixed liquid conveyer pipe of reentrant is spouted into msw incineration furnace through the atomizing spray gun again. The mixing tank is also designed to separate oil on the surface of the tank and sediment and remove slag at the bottom, which is similar to a slag and oil separating tank. The design has the function of two-stage deslagging and oil separation, and further ensures that the subsequent atomizing spray gun is not blocked by impurities and tar. Because the landfill leachate and the concentrated solution are liquid fluids and the main component is moisture, the landfill leachate and the concentrated solution are sprayed into the furnace to mainly absorb heat and evaporate in the burning process in the furnace and reduce the temperature of smoke in the furnace; what design atomizing spray gun was used is that compressed air atomizes, and compressed air pressure 0.4 ~ 0.5MPa can guarantee like this that the spray gun has good atomization effect, guarantees the atomizing liquid drop of more tiny particle diameter and is close to aerial fog, and aerial fog is dispersed in high temperature flue gas like this, can be evaporated rapidly and avoid moisture to instil into furnace's burning material on, avoided the waste incineration system heat loss. When the temperature of the hearth is higher than 1050 ℃, the fine-particle aerosol can uniformly cool the high-temperature flue gas in the hearth, thereby avoiding the furnace temperature fluctuation after back spraying of the landfill leachate and the concentrated solution and ensuring that the retention time of the flue gas in the area of the hearth above 850 ℃ is not lower than the key index of 2 s.
The utility model discloses two fluids are gone into stove and are returned system of spouting can also reduce smoke pollutants-nitrogen oxide production volume from the source, optimize flue gas denitration effect, specifically as follows: (1) when the temperature of the hearth is higher than 1000 ℃, along with the rise of the temperature of the hearth, the thermal type fuel nitrogen oxide is increased, the generation of the thermal type nitrogen oxide is accelerated, the concentration of the nitrogen oxide in the flue gas at the outlet of the waste incineration waste heat boiler is increased, and the consumption of the flue gas denitration ammonia water is increased. The liquid fluid can be sprayed back to properly reduce the temperature of the hearth and reduce the generation amount of nitrogen oxide sources in the waste incineration process. (2) The optimal reaction temperature for SNCR flue gas denitration in the incinerator is 850-950 ℃. When the furnace temperature rises to a temperature that has significantly deviated from this optimum reaction temperature, the efficiency of the reaction of ammonia with nitrogen oxides is reduced, resulting in a relative increase in ammonia consumption. When the furnace temperature rises to deviate from the optimal reaction temperature, the liquid fluid sprayed back can properly reduce the temperature of the hearth to the optimal interval, the flue gas denitration efficiency is improved, and the ammonia water consumption of the waste incineration power plant is saved. (3) Because landfill leachate original liquid ammonia nitrogen concentration is high, if landfill leachate is sprayed back into high temperature flame area, can decompose into ammonia under the high temperature condition, can regard as the reductant of denitration, can practice thrift the ammonia water consumption of waste incineration power plant from this.
The utility model discloses two fluids are gone into stove and are returned system of spouting, atomizing spray gun spout arrange in furnace air cooling wall upper portion, overgrate air upper strata wind high temperature flame region, for raising the efficiency and effect, can respectively set up 1 atomizing spray gun about every burns furnace, arrange like this and to realize good effect of spouting, guarantee that the interior concentrate of factory has been completely absorbed and has realized the zero release, and can fall to minimum to the influence of msw incineration furnace burning operating mode.
The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.
Claims (8)
1. A double-fluid furnace-entering back-spraying system capable of reducing the concentration of nitrogen oxides in a furnace is characterized by comprising an atomizing spray gun (1) arranged at the upper part of an air cooling wall of a garbage incineration furnace and in a secondary air upper layer high-temperature flame area, a mixed liquid conveying pipe (2) connected with the atomizing spray gun (1) and used for conveying mixed liquid of garbage percolate and garbage concentrated liquid for the atomizing spray gun (1), a mixing tank (3) connected with the free end of the mixed liquid conveying pipe (2), a garbage percolate conveying pipe (4) respectively connected with the mixing tank (3) and used for conveying garbage percolate for the mixing tank (3), and a concentrated liquid conveying pipe (5) used for conveying garbage concentrated liquid for the mixing tank (3);
the mixed liquor conveying pipe (2) is provided with a pressure pump (6), the liquid inlet end of the landfill leachate conveying pipe (4) is connected with a landfill leachate source so as to convey landfill leachate in the landfill leachate source to the mixing tank (3), the landfill leachate conveying pipe (4) is sequentially provided with a primary filter (7), a slag discharge oil separation tank (8) and a secondary filter (9) along the liquid flowing direction of the landfill leachate conveying pipe, the liquid inlet end of the concentrated liquor conveying pipe (5) is connected with the liquid outlet end of an NF/RO process unit in the landfill leachate treatment equipment, and the concentrated liquor conveying pipe (5) is provided with a DTRO membrane column (10) for concentrating concentrated liquor in the concentrated liquor conveying pipe again.
2. The system of claim 1, wherein the pipe ratio of the landfill leachate delivery pipe (4) to the concentrate delivery pipe (5) is 1:3, and the flow rates of the liquid in the landfill leachate delivery pipe (4) and the concentrate delivery pipe (5) are the same.
3. The double-fluid furnace-entering back-spraying system capable of reducing the concentration of nitrogen oxides in a furnace according to claim 2, wherein the material of the pipeline in the garbage leachate conveying pipe (4) which enters the front 2 meters of the garbage incineration furnace chamber and the material of the pipeline which enters the inside of the garbage incineration furnace chamber are both 1Cr18Ni9Ti, so that high-temperature corrosion can be prevented; the material of the rest pipelines in the landfill leachate conveying pipe (4) is HDPE solid-wall pipes.
4. The dual-fluid furnace inlet back-flow system capable of reducing concentration of nitrogen oxides in a furnace according to claim 3, wherein the deslagging oil-separating tank (8) comprises a deslagging oil-separating tank main body (81) in an inverted truncated cone shape, a liquid inlet (84) and a liquid outlet (85) are respectively arranged on the upper portion of one side and the lower portion of the other side of the deslagging oil-separating tank main body (81), the deslagging oil-separating tank main body (81) is connected to the landfill leachate conveying pipe (4) through the liquid inlet (84) and the liquid outlet (85), an oil discharge port (82) and a deslagging port (83) are respectively arranged on the upper portion and the bottom of the deslagging oil-separating tank main body (81), and the oil discharge port (82) is vertically located above the liquid inlet.
5. The system of claim 4 for reducing the concentration of nitrogen oxides in a furnace, characterized in that the mixing tank (3) comprises a mixing tank body (31) in the shape of an inverted truncated cone, the upper part of one side and the lower part of the other side of the mixing tank main body (31) are respectively provided with a mixing tank liquid inlet (34) and a mixing tank liquid outlet (35), the landfill leachate delivery pipe (4) and the concentrated solution delivery pipe (5) are respectively connected with the liquid inlet (34) of the mixing tank, the mixed liquid conveying pipe (2) is connected with the liquid outlet (35) of the mixing tank, the upper part and the bottom of the mixing tank main body (31) are respectively provided with a mixing tank oil outlet (32) and a mixing tank slag outlet (33), and the mixing tank oil drain (32) is vertically above the mixing tank liquid inlet (34).
6. The system for the two-fluid furnace feeding back injection capable of reducing the concentration of nitrogen oxides in the furnace according to claim 5, wherein the atomizing spray gun (1) is a compressed air atomizing spray gun, and the compressed air pressure of the compressed air atomizing spray gun is 0.4-0.5 MPa.
7. The system for the two-fluid inlet back-spray of furnace capable of reducing the concentration of nitrogen oxides in the furnace according to claim 6, characterized in that the primary filter (7) is a grid filter.
8. The system for the dual-fluid back-injection in a furnace for reducing the concentration of nitrogen oxides in the furnace as claimed in claim 7, wherein said secondary filter (9) is a self-cleaning filter.
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| CN201921467533.5U CN210688252U (en) | 2019-09-05 | 2019-09-05 | Double-fluid furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in furnace |
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| CN201921467533.5U CN210688252U (en) | 2019-09-05 | 2019-09-05 | Double-fluid furnace-entering back-spraying system capable of reducing concentration of nitrogen oxides in furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146101A (en) * | 2020-09-27 | 2020-12-29 | 广东通德电力工程有限公司 | Be used for rubbish power plant concentrate to spout furnace device again |
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2019
- 2019-09-05 CN CN201921467533.5U patent/CN210688252U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146101A (en) * | 2020-09-27 | 2020-12-29 | 广东通德电力工程有限公司 | Be used for rubbish power plant concentrate to spout furnace device again |
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