CN1896591A - Smoke purifier of domestic refuse incinerator - Google Patents
Smoke purifier of domestic refuse incinerator Download PDFInfo
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- CN1896591A CN1896591A CN 200610052126 CN200610052126A CN1896591A CN 1896591 A CN1896591 A CN 1896591A CN 200610052126 CN200610052126 CN 200610052126 CN 200610052126 A CN200610052126 A CN 200610052126A CN 1896591 A CN1896591 A CN 1896591A
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Abstract
This invention is a kind of smoke purifier device of domestic garbage incinerator. The system is arranged with lime dry powder and water spraying, lime slurry spraying and active carbon spraying devices to automatically start and adjust spraying to eliminate the acidic gas, toxic gas and dust. This invention includes smoke inlet opening, slag tap, lime dry powder ejector, reaction tower at smoke outlet, pre-dust remover, bag-type dust remover and draught fan. The reaction tower is also arranged with ejectors for water, slurry and atomized air. The active carbon mixer, thermocouple and acidic gas detector are arranged in front of the bag-type dust remover. This invention has little operation failure.
Description
Technical Field
The invention relates to a flue gas purification device for removing acid gases such as HCL, SOx, HF, toxic gases such as dioxin and dust in flue gas generated by burning household garbage, in particular to a flue gas purification device of a household garbage incinerator adopting a dual-purpose semi-dry method, which is simultaneously provided with a separate lime dry powder and water injection system, a lime slurry injection system and an active carbon injection system so as to automatically start and adjust the lime dry powder and water injection system and/or the lime slurry injection system according to the temperature, the flow and the content of the acid gases.
Background
As is well known, the smoke of a common coal-fired boiler contains harmful gases such as carbon monoxide and sulfur dioxide which are not fully combusted and fly ash, and the smoke can be discharged into the atmosphere after being purified; for the household garbage incineration furnace smoke, due to the numerous articles contained in the household garbage, especially plastic articles, waste batteries and the like commonly used by people, the smoke gas also contains toxic gases such as dioxin, heavy metal mercury and the like, and acid gases such as HCL, Sox and the like. Therefore, today, attention is paid to the purification of the smoke of the domestic waste incinerator while enhancing the environmental protection.
The existing flue gas purification devices can be classified into wet methods, dry methods, semi-dry methods and the like according to whether the devices generate waste water or the form of neutralizing agents used by the devices. The investment cost of the wet flue gas purification device is high, and the generated waste water contains heavy metal elements to cause secondary pollution, so the wet flue gas purification device is not generally used for flue gas purification of household garbage incineration. The dry flue gas purification device sprays Ca (OH) into an inlet flue of a bag-type dust remover2The powder is purified, and although no waste water is produced, the powder is neutralizedThe utilization rate is too low, and the desulfurization rate cannot be ensured, so the method has the tendency of being rejected. Semidry processes are currently used in many cases, and can be further divided into two categories according to the form of the neutralizing agent used: one is to use lime slurry as a neutralization absorbent to carry out flue gas deacidification treatment, the system is provided with a lime slurry injection device, and the quicklime is generally prepared into lime slurry with the concentration not lower than 15 percent; the other type is lime powder as a neutralization absorbent, and can also utilize part of purified fly ash, water and fly ash are mixed and then enter a reaction tower, and lime is sprayed independently; the former type has the problems of high consumption of neutralizing agent, poor load adaptability, easy blockage and abrasion of a slurry pipe and a nozzle, easy adhesion of the inner wall of a reaction tower and the like, and the latter type has the problems of high operation cost due to the fact that the mixing ratio of fly ash and water is not easy to control and the consumption of wall adhesion and lime powder is high, bag pasting is easy due to the increase of the bag load of a dust collector, the load adaptability is poor and the system is unstable. In a word, the existing flue gas purification device has a non-ideal purification effect because of only one single deacidification mode, and is easy to have inflexible regulation, high neutralizer consumption and high system failure rate when being used for the household garbage incinerator flue gas with large load change, and can not reach the environmental protection standard in serious cases.
According to the theory that the flue gas is gradually synthesized into dioxin at the temperature lower than 600 ℃, soda modified lime is added into the flue gas at the temperature of 600-800 ℃ to avoid the temperature so as to inhibit the synthesis of toxic organic matter dioxin in the flue gas, acid gas in the flue gas is reacted with the soda modified lime to be absorbed, and solid reaction products and fly ash carried in the flue gas are collected in a high-temperature dust collector. The patent provides a valuable theory of reducing dioxin synthesis by throwing sodium-alkali modified lime in a temperature range of a flue gas area of a garbage incinerator, but the adopted purification device comprising a sealed feeding device and a cyclone dust collector still has the problems existing in the prior flue gas purification device: the neutralizer is required to have high quality and high concentration, and the circulating fly ash cannot be utilized, so the running cost is high; meanwhile, when the load change is large, the adjustment is troublesome.
The device related to the dry circulating suspension bed flue gas desulfurization process and system disclosed in Chinese patent CN00128285.9 uses dry lime powder as a neutralizer, and simultaneously mixes fly ash separated from a dust remover with water according to a certain proportion, and returns the mixture serving as a return material to a reaction tower; the device is also provided with a low-resistance flue gas jet structure, an internal separation part and an external low-resistance separator. However, when the smoke purifier is used for purifying the smoke of the household garbage incinerator, the garbage contains a wide variety and uncertainty, so that the load fluctuation is frequent, the wave amplitude is large, toxic gas is contained, and the like, so that the following problems can occur: 1) the load fluctuation is difficult to adjust due to single variety of the neutralizer, so that the purification effect is influenced; 2) when lime dry powder is used as a neutralizer, the consumption is large due to low utilization rate of the neutralizer; 3) the proportion of water and ash is difficult to control, so that the blockage is easily caused, and the failure rate of the system is high; 4) it cannot remove toxic gases such as dioxin. The method can not timely adjust the amount of the return material and the amount of the neutralizer along with the changes of the flow rate of the flue gas, the temperature of the inlet flue gas and the acidic components in the flue gas; for example, when the flue gas temperature is low and the content of acid gas is high, the flue gas temperature before entering the bag-type dust remover is controlled to be above the dew point and the water spraying amount is not too large in order to protect the safe operation of the bag and the service life of the bag, but the problems that the dosage needs to be increased and the cost needs to be increased due to the low moisture content of lime are brought; on the contrary, when the flue gas temperature is high and the acid gas content in the flue gas components is low, the waterspraying amount is increased to ensure the normal operation of the cloth bag and the moisture content of the neutralizer, but the problem that the proportion of water and lime is difficult to control is brought, so that the problems of blockage of the material returning pipe and bag pasting of the cloth bag due to more water are caused. In addition, the method cannot be automatically adjusted, for example, the amount of the neutralizer and the water amount cannot be randomly adjusted according to the temperature of the flue gas and the content of the acidic gas in the purification process, so that the problems of unstable desulfurization efficiency, excessive neutralizer, difficult dust removal process due to increased viscosity of fly ash, incapability of meeting the environmental protection requirement, shortened service life of the bag-type dust remover and the like are caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a flue gas purification device of a household garbage incinerator, so that the flue gas purification device has the characteristics of good purification effect, high utilization rate of a neutralizer, low operation cost, small failure rate, long service life and the like.
The invention relates to a flue gas purification device of a household garbage incinerator, which comprises a reaction tower with a flue gas inlet, a slag discharge port, a spout of lime dry powder and a flue gas outlet, and a pre-dust remover, a bag-type dust remover and a draught fan which are sequentially connected with the flue gas outlet of the reaction tower, wherein the bottom of the reaction tower is provided with a venturi tube which can convert flue gas into high speed instantly after low-resistance injection, and the spout of the lime dry powder is arranged on the tower wall where the diffusion section of the venturi tube is positioned, and the flue gas purification device is characterized in that: the reaction tower is also provided with a nozzle for water, slurry and atomized air on the tower wall where the venturi tube diffusion section is located, an active carbon mixer is arranged between the pre-dust remover and the bag-type dust remover, a thermocouple is arranged on a channel of a flue gas outlet, and an acid gas detector is arranged on a flue at the outlet of the bag-type dust remover.
The invention relates to a flue gas purification device of a household garbage incinerator, which is characterized in that a circulating fly ash nozzle is also arranged on a reaction tower and is communicated with a fly ash outlet on a bag-type dust remover and a pre-dust remover through a material returning device.
The material returning device is provided with a material returning stranding cage which can adjust the outflow of the returned material through a frequency converter and an overflow stranding cage with an overflow ash pipe. So that the device can automatically adjust the frequency of a frequency converter on the return stranding cage according to the flue gas differential pressure and the flue gas flow in the reaction tower and change the return quantity of the fly ash returning to the reaction tower; the surplus fly ash in the material returning device can be sent to the ash conveying device through the overflow stranding cage and the overflow ash pipe.
The invention has the beneficial effects that: the lime dry powder and water injection system and the lime slurry injection system are independently arranged on the diffusion section of the reaction tower, and the lime slurry injection system and the return system can be matched, so that the lime dry powder and water injection system and/or the lime slurry injection system can be automatically started in operation according to the acid gas content, the flue gas flow, the flue gas temperature at the inlet of the bag-type dust collector and the flue gas differential pressure of the reaction tower which are monitored on line, and the injected slurry amount, water amount, powder injection amount and return amount can be automatically adjusted; thereby having the following advantageous effects: 1) the concentration of the lime slurry can be properly reduced and controlled below 10 percent, the blockage and abrasion of a nozzle or a pipeline can be effectively avoided, the operation failure is reduced, and the utilization rate of a neutralizing agent is increased due to the improvement of the liquid-solid ratio; 2) when the load fluctuates, the system can automatically select an operation mode according to the flow rate and the temperature of the flue gas and the content of the acid gas in the flue gas, or simultaneously spray lime slurry and spray lime dry powder, or independently spray lime slurry, or independently spray lime dry powder and water to treat the acid gas in the flue gas; the consumption of the neutralizer is greatly reduced while the flue gas is purified; 3) the device can also select the operation mode of lime dry powder and water injection and/or lime slurry injection of the system according to the quality of the purchased neutralizing agent, so that the quality requirement on the neutralizing agent is relatively low, and the running cost of the purification system can be reduced by using cheap quick lime or lime powder; 4) after the material returning stranding cage capable of adjusting the flow through the frequency converter is arranged on the material returning device, the system can automatically adjust the material returning amount according to the change of the smoke gas amount and the change of the smoke gas differential pressure in the reaction tower, simultaneously, the reaction time of the neutralizer and the utilization rate of the neutralizer are increased, and the operation cost is further reduced; 5) the device is provided with the active carbon mixer with adjustable balanced feeding, so that toxic substances such as dioxin, heavy metals and the like in the smoke of the household garbage incinerator can be thoroughly removed; 6) the device of the invention is characterized by high stability of operation for the following reasons: when the gas-solid ratio of an operating system is to be increased, lime slurry is generally preferred to improve the reaction rate of a neutralizing agent and reduce the using amount of the neutralizing agent, but a single lime slurry spraying system can cause blockage and accelerated abrasion of a slurry pipe or a nozzle due to high concentration of the lime slurry, and the system is unstable due to easy adhesion of a wall surface in a reaction tower; but the device is also provided with a lime dry powder spraying system, so that the blockage, abrasion and wall surface bonding can be avoided by relatively reducing the concentration of lime slurry, and even the lime dry powder and water can be immediately used for deacidification; similarly, when the system for deacidifying the lime dry powder and the water fails, the lime slurry spraying system can be started immediately; in a word, the independent arrangement of the lime dry powder, the water injection system and the lime slurry injection system in the device can deal with various faults and ensure that the purification process is continuously and stably carried out.
In summary, compared with the existing flue gas purification device, the device of the present invention can ensure that the flue gas of the domestic garbage incinerator reaches the environmental protection purification index, and can ensure that the system runs stably and reliably due to the fact that the device can adapt to frequent or large fluctuation of the load, has few operation faults and strong fault coping capability, and has the characteristics of low cost required by operation, long service life of the device, etc.
Drawings
FIG. 1 is a schematic view of a flue gas purification apparatus of a garbage incinerator according to the present invention;
FIG. 2 is a cross-sectional view of the construction of the dual fluid spray gun 10 of FIG. 1;
FIG. 3 is a nozzle for use on the circulating fly ash or dry lime powder nozzle of FIG. 1;
FIG. 4 is a schematic structural view of the activated carbon mixer 3 in FIG. 1;
the reference numerals in the figures illustrate: 1-a reaction tower; 1 a-a flue gas inlet; 1 b-a slag discharge port; 1 c-jets of water and/or lime slurry and atomizing air; 1 d-circulating fly ash nozzle; 1 e-a flue gas outlet; 1 f-thermocouple; 1 g-lime dry powder nozzle; 1 h-acid gas detector; 2-a pre-precipitator; 3-an activated carbon mixer; 3 a-an activated carbon nozzle; 4-bag dust collector; 5-a draught fan; 6-returning charge device; 6' -returning and stranding cage; 7-overflow stranding cage; 8-overflow ash pipe; 9-a return pipe; 10-a two-fluid spray gun; 10 a-inlet of lime slurry or water; 10 b-inlet of atomizing air; 11-nozzles for dry lime powder or return; 12-a slag extractor; 13-a conveyor; i-lime slurry making system.
Detailed Description
Example 1, the structure of the flue gas cleaning device of the domestic garbage incinerator of this example can be seen from fig. 1, it is charteredComprises a flue gas inlet 1a, a slag discharge port 1b, lime dry powder Ca (OH)2The reaction tower 1 with a nozzle 1g and a flue gas outlet 1e, and a pre-dust collector 2, a bag-type dust collector 4 and an induced draft fan 5 which are sequentially connected with the flue gas outlet of the reaction tower. Wherein the bottom of the reaction tower 1 is provided with a venturi tube, namely the bottom of the tower body is provided with a contraction section with a gradually reduced section from bottom to top and a diffusion section with a gradually enlarged section upwards, so that the flue gas can be instantly converted into high speed to enter a reaction zone after being injected with low resistance; a nozzle 1g of the lime dry powder is arranged on the tower wall where the venturi tube diffusion section is located; the device of the embodiment is also provided with a nozzle 1c for water, slurry and atomized air on the tower wall of the reaction tower where the venturi tube diffusion section is positioned, an active carbon mixer 3 between the pre-dust remover 2 and the bag-type dust remover 4, a thermocouple 1f on a channel of a flue gas outlet, and an acid gas detector 1h on a flue of an outlet of the bag-type dust remover.
When the device of the embodiment is used, the flue gas which is from the household garbage incinerator and contains toxic gases such as HCL, Sox, HF, dioxin and the like and fly ash enters from the flue gas inlet 1a at the bottom end of the reaction tower 1, the airflow is accelerated when passing through the Venturi tube at the lower part of the tower, and is mixed with water or lime slurry and atomized air which are sprayed into the tower from the spray port 1c and/or lime dry powder sprayed from the spray port 1g, the fly ash is blown away, the deacidification process is completed in the full contact with the flue gas, and dioxin and heavy metals in the flue gas are also partially removed by being adsorbed on the surface of the high-concentration lime dry powder; then the flue gas leaves the reaction tower from an outlet 1e and enters a pre-dust remover 2, gas and solid are primarily separated, the separated fly ash enters a material returning device 6, and the flue gas enters an active carbon mixer 3; in an activated carbon mixer, the residual dioxin and heavy metals in the flue gas are completely adsorbed by the activated carbon powder which is reversely sprayed; and finally, the flue gas enters a bag-type dust collector 4, is further dedusted and then is discharged into the atmosphere through a draught fan 5. The fly ash captured by the bag dust collector 4 is discharged from the bottom end thereof and transported to the return feeder 6 by the conveyor 13.
The deacidification of the flue gas purified by the device of the embodiment can reach and exceed the international environmental protection requirement, the dedusting rate can reach 99.9 percent, and the content of dioxin is 0.1ng/nm3The above.
The desuperheating water, the slurry and/or the lime dry powder sprayed from the nozzle 1g through the nozzle 1c are subjected to the following deacidification reaction in contact with the flue gas:
the temperature of the above-mentioned reaction process is as low as possible, since the capacity of the flue gas to absorb acidic components increases with decreasing temperature, but too low a temperature will increase the tendency of the recycles in the reaction tower to bind; meanwhile, too high or too low temperature can affect the service life of the bag-type dust collector, and the temperature of the flue gas entering the bag-type dust collector is controlled to be 10-20 ℃ above the dew point.
It can also be seen from figure 1 that the lime slurry used in the flue gas cleaning plant of the present invention is supplied from a slurrying system I and then water/slurry and atomizing air are injected into the reaction tower 1 from nozzles 1c through a two-fluid lance 10 mounted in the pipe. The pulping system I comprises a storage bin, a conveyor, a mixer and a stirrer which are sequentially arranged from top to bottom; lime is fed from a storage bin onto a conveyor, is conveyed into a mixer by the conveyor to be mixed with water, is uniformly stirred by a stirrer to form lime slurry required by deacidification reaction, enters a slurry storage tank (not shown in the figure) and is output by a pipeline.
FIG. 1 also shows the lime dry powder spouting system of the flue gas purification apparatus of the present invention, wherein the lime dry powder is pulverized Ca (OH)2Dry powder, which is supplied from a dry powder silo (not shown in the figure), is sprayed into the reaction tower 1 from a dry powder nozzle 1g through a pipeline and a dry powder spraying device 11. The construction of the dry lime powder or return injection device 11 can be seen in fig. 3, which uses a conventional laval nozzle.
The pre-dust collector 2 is an inertial dust collector with a groove-shaped iron inside, smoke enters the inertial separator from the outlet of the reaction tower, then is collided with the groove-shaped iron to enable fly ash contained in the smoke to be separated downwards by means of inertia of the smoke, and enters a material returning device 6 from a pipeline below the smoke; the flue gas after gas-solid separation by the pre-dust remover enters an active carbon mixer 3.
The structure of the activated carbon mixer in this embodiment can also be seen from fig. 4, which has an activated carbon nozzle 3a, the activated carbon powder is sprayed from bottom to top, and the flue gas passes from top to bottom, in the reverse contact between the activated carbon powder and the flue gas, the activated carbon powder can fully adsorb the residual toxic gas and dust particles in the flue gas to purify the flue gas. The adding amount of the activated carbon is added according to the amount of flue gas in a set proportion; the powder active carbon is sprayed into a flue at the outlet of the reaction tower and the inlet of the bag-type dust collector by a feeder through compressed air, and a venturi (i.e. a contraction section and a diffusion section which are arranged on the wall of the venturi) mixing section is also arranged at the spraying position so as to enhance the mixing of the active carbon and the dust, ensure that the active carbon can absorb Hg and dioxin poisons in the flue gas to achieve the best effect, and ensure that the emission of the flue gas meets the environmental protection requirement.
The bag-type dust collector 4 is internally provided with a low-pressure pulse off-line dust cleaning device, fly ash separated by the bag-type dust collector falls to the conveyor 13 through a bottom valve, and is conveyed to the material returning device 6 by the conveyor; the flue gas dedusted by the bag-type dust remover is discharged to the atmosphere by the induced draft fan 5.
The above-mentioned two-fluid spray gun 10 capable of spraying water/slurry and atomizing air into the reaction tower 1 from the spray port 1c is structured as can be seen from fig. 2, and is a nozzle having a passage 10a for water or lime slurry and an atomizing passage 10b for compressed air, and it can spray not only lime slurry and desuperheating water at the same time under atomization of compressed air, but also only desuperheating water as a desuperheating medium when spraying dry lime powder, and it is also simple and reliable in structure because of no moving parts, and it can realize on-line replacement and convenient operation.
In the embodiment, the thermocouple 1f and the acid gas detector 1h which are arranged on the channel of the flue gas outlet are used for monitoring the flue gastemperature and the content of the acid gas in real time, and are matched with other instruments in the reaction tower, such as a flowmeter and a pressure gauge, so that a basis is provided for the selection of the operation mode of the system and the automatic adjustment in the operation of the system, and the automatic and reliable operation of the flue gas purification process is ensured.
The basis of the above-mentioned three different deacidification modes of the purification device for implementing the lime spraying slurry alone, the lime spraying dry powder alone or the lime spraying slurry and the lime spraying dry powder simultaneously in the system operation is as follows:
1) when the fluctuation of the content of the acid gas in the flue gas is large, the automatic control system can automatically start and/or not start the lime spraying dry powder system according to the content of the acid gas. When the amount of sprayed lime slurry with thinner concentration can meet the requirement of environmental protection, a lime powder spraying system can be suspended; when the acid gas component is high and the independent lime slurry spraying cannot meet the environmental protection standard, the lime powder spraying system is automatically started in time to run simultaneously with the lime slurry spraying system.
2) When the flue gas temperature is low and the acid gas content is high, the system can automatically reduce the spraying of lime slurry amount according to the requirement of the flue gas temperature, thereby reducing the moisture content in the reaction tower to ensure that the flue gas temperature is above the dew point temperature, and simultaneously, the lime dry powder spraying device is automatically started or not started according to the acid gas content, namely, when the acid gas content is high, the lime dry powder spraying system is automatically started and operates simultaneously with the lime slurry spraying system; otherwise, the lime powder spraying system is suspended.
The selection of the operation mode is based on the premise that the system operates stably and reliably and the deacidification efficiency is ensured, and simultaneously, the principle of reducing the consumption of the neutralizer is adopted. The design height of the reaction tower 1 is designed to meet the principle that the flue gas has sufficient time to complete deacidification reaction and moisture evaporation and heat absorption.
Example 2, the purification apparatus of this example is also seen from fig. 1, which is different from example 1 in that: the reaction tower 1 is also provided with a material returning pipe 9 and a circulating fly ash nozzle 1d which are communicated with a material returning device 6, and the material returning device 6 is communicated with the fly ash outlets on the bag-type dust collector 4 and the pre-dust collector 2. So that the fly ash collected in the purification process can be used as return ash to be returned to the reaction tower again through the circulating fly ash nozzle 1d on the outlet end of the return pipe 9 for recycling. The returned ash contains fly ash particles, residual neutralizer and neutralizer, and the fly ash in the flue gas participates in drying, catalysis and chemical reaction in the tower together with the fly ash in the flue gas, so that the utilization rate of the neutralizer is maximized, and the reaction product in the flue gas, the circulating fly ash and the sprayed neutralizer increase the surface of the contact reaction with the acidic flue gas together, so that the chemical reaction is more complete and sufficient, and the reaction efficiency is improved. In addition, the strong turbulence effect and the proper temperature generated when the high-concentration dry circulating material returns to the tower can effectively keep the inner wall surface of thereaction tower clean and free of deposits, and the ash entering the material returning pipe is dry ash, so that the problem of blockage caused by the fact that the material returning pipe carries water can be avoided. A small amount of settled material generated in the reaction tower can be discharged through a slag discharge port 1b at the bottom of the tower.
Example 3, the purification apparatus of this example is also seen from fig. 1, which is different from example 1 or example 2 in that: a return material stranding cage 6' capable of adjusting the outflow of the return material through a frequency converter and an overflow stranding cage 7 with an overflow ash pipe 8 are also arranged on the return feeder 6. Therefore, the purification device of the embodiment can automatically adjust the frequency of the frequency converter on the return stranding cage 6' and change the return amount of the fly ash according to the flue gas differential pressure and the flue gas flow in the reaction tower; and can be sent to an ash conveying device (not shown) arranged at the outside through an overflow stranding cage 7 and an overflow ash pipe 8 when the fly ash in the returning charge is redundant
In addition to the description of the flue gas purification apparatus of a garbage incinerator by the above three examples, the present invention also tests the apparatus, and the following are data measured in the test:
the inlet flue gas amount of the household garbage incinerator flue gas is 26000-29000 nm3H; the inlet flue gas comprises the following components: sox 292-412 mg/m3、HCL 300～750mg/m3After being purified by the purification device, the content of the acidic gas components in the outlet flue gas meets the environmental protection requirement, namely SOx is less than or equal to 260ng/m3、HCL≤75mg/m3. The amounts of neutralizing agent used for the three different modes of addition of neutralizing agent on the above premises are given in table 1:
TABLE 1
From the above table it can be seen that: when the smoke index meets the environmental protection requirement, the dosage of the neutralizer is the highest by adopting a dry powder spraying mode, and the dosages of the neutralizer used by adopting a slurry spraying mode and a slurry spraying and powder spraying dual-purpose mode are basically consistent; when the system returns materials, the dosage of the neutralizer is only 0.85-0.9 of the original dosage. Therefore, the invention ensures that the smoke of the domestic garbage incinerator reaches the environmental protection and purification index, and simultaneously reduces the consumption of the neutralizer, so the cost required by the operation is lower.
The control system in the flue gas purification device of the household garbage incinerator automatically realizes flue gas purification with minimum lime consumption as a criterion. The control system for desulfurization and dehydrochlorination mainly comprises three control loops.
The first control loop is to control the amount of recycle material entering the reactor according to the variation of the amount of flue gas at the inlet. The recycled materials have larger reaction contact area and are uniformly distributed in the reactor, so that the recycled materials can be fully contacted with the lime and the flue gas. At the same time, the rapid flushing of the large amount of recycle effectively prevents the mortar from sticking to the inner walls of the reactor.
The second control loop controls the water supply amount by measuring the temperature of the outlet flue gas so as to ensure that the fluegas is cooled to a proper temperature and kept above the dew point temperature, ensure the safe operation of the bag-type dust collector and improve the chemical reaction rate of lime.
The third control loop is to control the addition amount of lime, the mixing ratio of the lime can be calculated by continuously monitoring the flow of the inlet flue gas and the content of the acid gas in the outlet gas, and the dry lime powder can be automatically added or not added in the guniting process according to the requirement.
Through the three control loops of desulfurization and dehydrochlorination, the flue gas purification device of the household garbage incinerator can obtain the result of low consumption of the neutralizer shown in the table 1 on the premise that the flue gas index meets the environmental protection requirement, namely, lower cost required by operation.
Claims (3)
1. The utility model provides a flue gas purification device of domestic waste incinerator, it contains one and has flue gas inlet (1a), row cinder notch (1b), spout (1g) of lime dry powder, the reaction tower 1 of exhanst gas outlet (1e) and connect gradually dust precipitator (2) in advance on the reaction tower exhanst gas outlet, sack cleaner (4), draught fan (5), wherein the bottom of reaction tower (1) has and enables the flue gas and can trun into fast-speed venturi immediately after the low resistance jets into, and spout (1g) of lime dry powder sets up on the tower wall at venturi diffuser section place, characterized by: the reaction tower is also provided with a nozzle (1c) for water, slurry and atomized air on the tower wall where the venturi tube diffusion section is positioned, an activated carbon mixer (3) is arranged between the pre-dust remover (2) and the bag-type dust remover (4), a thermocouple (1f) is arranged ona channel of a flue gas outlet, and an acid gas detector (1h) is arranged on a flue of the bag-type dust remover outlet.
2. The flue gas purification apparatus of a garbage incinerator according to claim 1, wherein: a circulating fly ash nozzle (1d) is also arranged on the reaction tower and is communicated with a fly ash outlet on the bag-type dust collector (4) and the pre-dust collector (2) through a material returning device (6).
3. The flue gas purification apparatus of a garbage incinerator according to claim 2, wherein: the material returning device (6) is provided with a material returning stranding cage (6') which can adjust the outflow of the returned material through a frequency converter and an overflow stranding cage (7) with an overflow ash pipe (8).
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| CNB2006100521269A CN100422643C (en) | 2006-06-23 | 2006-06-23 | Smoke purifier of domestic refuse incinerator |
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| CNB2006100521269A CN100422643C (en) | 2006-06-23 | 2006-06-23 | Smoke purifier of domestic refuse incinerator |
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| CN101644437B (en) * | 2009-08-17 | 2011-01-05 | 江苏亿金环保设备工程有限公司 | Flue gas purifying system and method |
| CN101342458B (en) * | 2008-08-15 | 2011-07-20 | 杭州新世纪能源环保工程股份有限公司 | Semi-dry process smoke eliminator with independent temperature-reducing column |
| CN102366704A (en) * | 2011-10-26 | 2012-03-07 | 中国科学院过程工程研究所 | Device and method for removing sulphur dioxide and dioxin from sintering flue gas |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE466943B (en) * | 1989-12-05 | 1992-05-04 | Flaekt Ab | PROCEDURE AND DEVICE FOR CLEANING A PROCESS GAS |
| US5795548A (en) * | 1996-03-08 | 1998-08-18 | Mcdermott Technology, Inc. | Flue gas desulfurization method and apparatus |
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| JP3849287B2 (en) * | 1998-03-02 | 2006-11-22 | 石川島播磨重工業株式会社 | Exhaust gas treatment method for ash melting furnace |
| CN1185041C (en) * | 2000-10-24 | 2005-01-19 | 浙江大学 | Circular suspension type semi-dry fume purifier |
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| CN200940842Y (en) * | 2006-06-23 | 2007-08-29 | 杭州新世纪能源环保工程股份有限公司 | Flue gas purifier of home refuse incinerator |
-
2006
- 2006-06-23 CN CNB2006100521269A patent/CN100422643C/en active Active
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