Household garbage incineration system capable of co-processing leachate

Abstract

The utility model discloses a household garbage incineration system capable of co-processing leachate, which comprises an incinerator, a garbage feed hopper arranged on one side of the incinerator, and a drying and purifying mechanism arranged between the incinerator and the garbage feed hopper. The leachate treatment device has the effects of efficiently treating leachate, and being low in cost and environment-friendly.

Description

TECHNICAL FIELD

[0001] The utility model relates to organic solid waste disposal field especially relates to a kind of domestic waste incineration system of synergic disposal percolate. BACKGROUND

[0002] Domestic waste incineration disposal is the most effective way to solve the city garbage at present, with the increasingly perfect domestic waste incineration technology, garbage incineration has become the main way of domestic waste disposal in our country. Due to the lag of domestic waste classification in our country, it causes that the composition of domestic waste in our country is complex, the water content is high, the garbage calorific value is low and other characteristics, which seriously affects the domestic waste incineration efficiency in the process of garbage incineration;In order to reduce the water content in domestic waste and improve the calorific value of garbage, a larger garbage storage pool is usually set, and the garbage is dewatered by microbial fermentation. Domestic waste usually needs to be stored and fermented for 5-7 days, so that the water content can be reduced by about 10-15%. After dewatering by microbial fermentation, the percolate produced usually needs to be treated by a special percolate treatment device. The composition of percolate is usually complex, with high salt content, high COD content and high ammonia nitrogen content. Due to the high difficulty of percolate treatment, single biochemical, physical and chemical, membrane method and other technologies cannot effectively treat percolate to meet the standard, and usually a complex combined process is needed, which is difficult to handle and has high processing cost. For township domestic waste disposal, garbage incineration is still the most effective way of treatment. The disposal scale of township domestic waste is usually small, and the proportion of kitchen waste in domestic waste is high, the water content is high, and the calorific value is low, which causes large fluctuation in the combustion process and unstable operation condition. Under this condition, it is necessary to store, ferment and dewater domestic waste. However, due to the small amount of treatment, the total amount of percolate produced is small, and the percolate treatment is difficult and the process is complex. The cost of small-scale percolate treatment device is high, and the operation condition is difficult to stabilize. Therefore, it is not feasible to separately support percolate treatment facilities for township domestic waste. Therefore, the mainstream method in the industry is to send percolate into the furnace by back spraying to destroy percolate in the high temperature environment of the furnace. Due to the low calorific value of rural domestic waste, it is difficult to achieve stable combustion at a high temperature of more than 850℃. In this case, it is easy to cause low temperature in the furnace and incomplete combustion, which leads to the problem of exceeding the standard of pollutants. When back spraying in the furnace with the help of auxiliary fuel, the temperature can be controlled, but a large amount of auxiliary fuel is needed to spray percolate, which increases the cost of garbage disposal and has poor economic efficiency. SUMMARY

[0003] In view of the above problems, the purpose of the utility model is to provide a kind of domestic waste incineration system of synergic disposal percolate, and it has the characteristics of high efficiency, environmental protection and low cost.

[0004] To achieve the above object, the utility model provides a kind of domestic waste incineration system of collaborative disposal leachate, it is characterized by, including incinerator and the garbage feeding hopper being equipped with in incinerator side, and the drying and purification mechanism being equipped with between incinerator and garbage feeding hopper.Drying and purification mechanism include the dryer being equipped with with garbage feeding hopper below and being communicated with garbage feeding hopper, the bunker being equipped with with dryer end and being respectively communicated with dryer and incinerator, the percolate nozzle being equipped with in dryer, the drying gas outlet being equipped with in dryer, the circulating flue gas inlet being equipped with in bunker, the drying gas purification tower being equipped with with drying gas outlet and being communicated with in incinerator side, the circulating fan being equipped with with circulating flue gas inlet and being connected in drying gas purification tower, and the secondary air nozzle being equipped with with circulating fan and being connected in incinerator inlet side.

[0005] In some embodiments, the dryer includes a container communicated with the bunker and the garbage feeding hopper, and stirring blades arranged in the container to push the material towards the bunker of the incinerator.

[0006] In some embodiments, a staggered sealing valve is arranged between the garbage feeding hopper and the dryer.

[0007] The utility model has the advantages of efficient disposal of leachate and low cost. The drying and purification mechanism is used to dry the domestic waste, which collaboratively disposes the leachate. The structure is simple, the operation efficiency is high, and the cost is low. The leachate disposal facility does not need to be separately arranged. The leachate is treated in the dryer, which avoids the negative effect of leachate back spraying on the temperature in the incinerator, and is beneficial to the operation stability of the small domestic waste incinerator in the town. The leachate is evenly sprayed on the surface of the domestic waste for drying and evaporation, which has the characteristics of large evaporation specific surface area and high evaporation efficiency. The high-temperature flue gas at the outlet of the incinerator is used as a heat source to heat the drying and purification mechanism, which solves the problem of waste heat resource utilization of the small domestic waste incinerator in the town. The leachate is directly sprayed into the drying chamber for evaporation, and the high-concentration inorganic salt and organic matter carried by the leachate are retained in the domestic waste. The water and a small amount of volatile organic waste gas and foul gas are discharged with the drying gas, and are condensed and cleaned in the drying gas purification tower. This process efficiently solves the problems of high salt content and difficult degradation of organic matter in the leachate treatment process, directly converts the leachate into dry waste gas purification tower wastewater with low pollution and low treatment difficulty. In addition, the drying gas usually contains a small amount of non-condensable foul components. In this process, the purified drying gas is sent into the secondary air pipe of the incinerator, which not only solves the problem of secondary air supply of the incinerator, but also effectively decomposes the residual foul gas components in the drying gas in the high-temperature environment of the incinerator. Therefore, the leachate is efficiently disposed and the cost is low, and the environmental protection effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The utility model discloses a structure schematic view. DETAILED DESCRIPTION

[0009] The utility model will be further explained in detail in connection with the drawings.

[0010] As Figure 1 The utility model discloses a kind of domestic waste incineration systems that can be cooperated with leachate, including incinerator 01 and being equipped with garbage feeding hopper 02 in the side of incinerator 01, and being equipped with drying and purification mechanism 03 between incinerator 01 and garbage feeding hopper.The drying and purification mechanism 03 includes being equipped with drying machine 31 with garbage feeding hopper 02 in the below of garbage feeding hopper 02, being equipped with bin 32 with drying machine 31 and incinerator 01 respectively in the end of drying machine 31, being equipped with leachate nozzle 33 by outside to the inside of drying machine 31 conveying leachate in drying machine 31, drying gas outlet 34 being equipped with in drying machine 31, circulating flue gas inlet 35 being equipped with in bin 32, drying gas purification tower 36 being equipped with with drying gas outlet 34 in the side of drying machine 31, circulating fan 37 being equipped with with circulating flue gas inlet 35 in drying gas purification tower 36, and secondary air nozzle 38 being equipped with with circulating fan 37 in the side of incinerator 01 entrance.Drying machine 31 includes container 311 with bin 32 and garbage feeding hopper 02 are communicated, and being equipped with in container 311 towards incinerator bin 32 and push material's stirring vane 312.Misplacement seal valve 39 is arranged between garbage feeding hopper and drying machine 31.Leachate is treated as medium with garbage, and leachate is evenly sprayed on the surface of domestic waste, to increase the heat transfer specific surface area when drying, and realize efficient drying process to leachate in drying machine.Salt, organic matter after leachate finally enter incinerator with domestic waste and are disposed, without additional equipment disposal.Working principle:

[0011] The garbage is first put into the feeding hopper of the dryer 31 before incineration, and under the premise that air does not leak into the dryer 31, the garbage enters the dryer 31 smoothly through the action of the staggered sealing valve 39, and is continuously turned and moves to the end of the dryer 31 under the action of the stirring blade 312. The leachate nozzle located at the upper part of the dryer 31 close to the feeding hopper sprays leachate uniformly on the surface of the household garbage. The high-temperature flue gas drawn into the dryer 31 from the high-temperature flue gas outlet of the incinerator 01 is adjusted in temperature and then uniformly exchanges heat with the materials in the dryer 31. The water in the leachate sprayed on the surface of the garbage and the water contained in the garbage are uniformly evaporated, and the remaining inorganic salts and organic matters in the leachate are discharged from the dryer 31 together with the garbage and are sent to the storage bin 32 of the household garbage incinerator 01 and then are sent into the furnace for high-temperature incineration along with the operation of the furnace grate of the incinerator 01. When the dryer 31 dries the garbage and the leachate, the dry gas generated is sent to the dryer 31 purification tower through the dryer outlet 34. After being cooled and cleaned by circulating cooling water in the dryer 31 purification tower, the temperature of the dry gas is lowered, the water vapor carried by the dry gas is condensed, and a small amount of dust and foul-smelling gas components are cleaned. The purified dry gas is pressurized by the dry gas circulating fan 37 and then is sent to the gas circulation inlet and the secondary air nozzle 38 of the incinerator 01, respectively. The dry gas sent to the gas circulation inlet is mixed with the high-temperature flue gas entering the end of the dryer 31 to achieve the purpose of adjusting the temperature of the high-temperature flue gas. The dry gas sent to the secondary air nozzle 38 of the incinerator 01 is combusted at high temperature in the furnace, thereby solving the problem of decomposing and destroying the foul-smelling gas in the dry waste gas.

[0012] The above only describes some embodiments of the present application. Those skilled in the art can make some modifications and improvements without departing from the inventive concept of the present application, and these modifications and improvements are within the protection scope of the present application.

Claims

1. A domestic waste incineration system capable of synergistically treating leachate, characterized by, The incinerator comprises an incinerator and a garbage feeding hopper arranged on one side of the incinerator, and a drying and purifying mechanism arranged between the incinerator and the garbage feeding hopper. The drying and purifying mechanism comprises a dryer arranged below the garbage feeding hopper and communicated with the garbage feeding hopper, a material bin arranged on the end of the dryer and communicated with the dryer and the incinerator respectively, a leachate nozzle arranged on the dryer and used for conveying leachate from outside to inside of the dryer, a drying gas outlet arranged on the dryer, a circulating flue gas inlet arranged on the material bin, a drying gas purifying tower arranged on one side of the drying gas outlet and communicated with the drying gas outlet, a circulating fan arranged on the drying gas purifying tower and connected with the circulating flue gas inlet, and a secondary air nozzle arranged on one side of the inlet of the incinerator and connected with the circulating fan.

2. The household garbage incineration system capable of synergistically disposing leachate according to claim 1, characterized in that, The dryer comprises a container communicated with the material bin and the garbage feeding hopper, and stirring blades arranged in the container and used for pushing material to the material bin of the incinerator.

3. The household garbage incineration system capable of synergistically treating leachate according to claim 1, characterized in that, A staggered sealing valve is arranged between the garbage feeding hopper and the dryer.

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