CN212504507U - Sludge or oil sludge drying and burning treatment circulating system - Google Patents

Abstract

The utility model provides a mud or oily sludge are dried, burn and handle circulation system, this mud or oily sludge are dried, burn processing system includes N interconnect's drying-machine, be equipped with the feed inlet on the first drying-machine, N platform drying-machine discharge gate and low heat value burn burning furnace feed inlet and be connected, be equipped with the gas vent on the low heat value burn burning furnace, the gas vent is connected with every drying-machine through air supply pipeline, all be equipped with the exhaust outlet on every drying-machine, be equipped with lime-ash export and air inlet on the low heat value burn burning furnace, be equipped with cooling air inlet and cooling air regulation fan on the air supply pipeline. High-temperature flue gas generated by burning sludge or oily sludge is used for drying the sludge or oily sludge with high moisture after being cooled, the dried material is sent into a low-calorific-value fuel burning furnace for burning to form circulation, various harmful substances are decomposed at the high furnace temperature, and the flue gas provides the drying heat for the sludge or oily sludge, so that the sludge or oily sludge is subjected to reduction and harmless treatment.

Description

Sludge or oil sludge drying and burning treatment circulating system

Technical Field

The utility model relates to an industrial furnace combustion system, in particular to a sludge or oil sludge drying and burning treatment circulating system.

Background

At present, the environmental pollution problem of China is serious, and the pollution of atmosphere, water and soil seriously threatens the environmental ecology and the life safety and seriously influences the sustainable development of the country. In particular, the accumulation of oil sludge and sludge has reached a very serious stage.

At present, most of the sludge is buried or piled in the open air except a small amount of sludge is used as fertilizer. The industrial kiln combustion technology is adopted to treat oil sludge and sludge.

The main reason is that the existing sludge treatment technology has the following defects: 1. after drying and carbonizing, the high-calorific-value combustible materials are seriously reduced due to decomposition and volatilization, the materials are required to have a calorific value more than or equal to 2000 calories/kg to be easily combusted, and the calorific value of the sludge or the oil sludge is generally lower than 2000 calories/kg, so that the sludge or the oil sludge is generally dried and carbonized to the moisture content of 20 percent by adopting high-temperature hot air (the temperature of hot air is higher than 400 ℃) in a dryer and a carbonization furnace and then is sent to a combustion furnace for combustion; when the temperature is higher than 400 ℃, after most of organic matters and oil are decomposed and volatilized, the heat value is reduced seriously (the heat value loss can reach more than 60 percent), the heat balance can not meet the requirement of internal circulation, diesel oil, natural gas, coal or biomass fuel and the like are required to be added, so that various harmful substances such as dioxin and the like can be decomposed only when the comprehensive heat value of the materials reaches about 3000 calories/kg and the furnace temperature reaches more than 800 ℃, the treatment cost is extremely high and reaches 800 yuan/ton of sludge or oil sludge at 300-; the investment is relatively large; harmful gases such as dioxin DAB are difficult to grasp due to unstable furnace temperature; 2. the high-temperature pyrolysis furnace can better solve the problem of standard emission of dioxin, but has the defects of large investment, 50-80 ten thousand yuan/ton investment of disposal equipment for each ton of sludge or oil sludge and high operating cost.

The oil sludge treatment is more complex, oil-water separation is firstly carried out, most of combustible substances are extracted in the existing treatment process, the pollutants of the residual oil sludge are difficult to treat and difficult to burn, the treatment cost is high, and the treatment cost of each ton of oil sludge reaches thousands of yuan.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome the above-mentioned defect that prior art exists, provide a furnace temperature stable, the calorific value remain basically in the drying material, the burning is more complete and high-efficient, difficult harmful gas that produces, the investment is less relatively, the lower mud of treatment cost or oil sludge are dried, are burned and are handled circulation system.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a mud or oil sludge are dried, incineration disposal circulation system, includes N drying-machines of interconnect in proper order, and the discharge gate of first drying-machine is connected with the feed inlet of second drying-machine promptly, and the discharge gate of second drying-machine is connected with the feed inlet of third drying-machine, analogizes in proper order, and the discharge gate of N drying-machine is connected with low heat value fuel incinerator feed inlet, the last gas vent that is equipped with of low heat value incinerator, the gas vent is connected with the air inlet of every drying-machine through the air supply pipeline that is equipped with cooling air inlet, all is equipped with the waste gas outlet on every drying-machine, be equipped with lime-ash export and air inlet on the low heat value fuel incinerator, still be equipped with cooling regulation fan on.

Furthermore, the number of the drying machines is more than or equal to 2 and less than or equal to 5, and preferably 2-3 drying machines are used.

Further, a waste gas outlet on the dryer is connected with a flue gas purification system.

Further, the low-heat value fuel incinerator is a circulating fluidized bed incinerator which is used for burning 600-charge 2000-calorie/kg low-heat value fuel, and a steam boiler is arranged at the upper part of the circulating fluidized bed incinerator.

Further, the low-heat-value fuel incinerator is a hot blast stove for burning 600-inch 2000 calories/kg low-heat-value fuel.

Further, the low-heat value fuel incinerator is a boiling furnace which is used for burning 600-charge 2000 calorie/kg low-heat value fuel, and a steam boiler is arranged at the upper part of the boiling furnace.

After the sludge or the oil sludge is continuously dried by a plurality of dryers of the system at the temperature below 400 ℃, the grade of the heat value is greatly improved, and the organic combustible in the sludge or the oil sludge can be basically reserved in the drying material due to the lower drying temperature, and the practice shows that the heat value is basically not lost. The combustion in the incinerator is more complete and efficient; the whole system is in closed circulation, no peculiar smell is generated, and the field working environment is greatly improved.

The sludge or oil sludge with high water content can also directly enter the dryer of the system to dry the oil sludge and sludge, the drying material is used as the fuel of the incinerator, and the tail gas of the low-calorific-value fuel incinerator is provided by an air supply pipeline. The heat generated by the self combustion of the sludge or the oil sludge can basically maintain the operation of the whole low-heat-value fuel incinerator device, ensure the incinerator temperature to be more than 800 ℃, and basically provide heat energy additionally; the ash obtained after the sludge incineration has good activity and can be used for being blended with cement to be used as a building material.

The high-temperature flue gas generated after the incineration of the sludge or the oil sludge is utilized to cool and dry the sludge or the oil sludge with high moisture, the dried sludge or the oil sludge is sent into a low-calorific-value incinerator to be incinerated to form circulation, various harmful substances are decomposed at the high-calorific-value incinerator temperature, the flue gas provides heat for drying the sludge or the oil sludge, and the sludge or the oil sludge can be reduced and harmlessly treated totally.

The utility model discloses with minimum investment, the pollution-free processing of mud or oil sludge has been solved to extremely low cost, solves the problem of harmful gas polluted environment such as dioxin in the waste gas again, still can use its lime-ash to do the building materials, has solved the secondary pollution problem, and fundamentally has solved the public nuisance of mud or oil sludge.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

In the figure: 1. the device comprises a first dryer, a second dryer, a third dryer, a first dryer, a second dryer, a third dryer, a fourth dryer, a fifth dryer, a sixth dryer, a.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1, the present embodiment includes three dryers connected to each other, which are a first dryer 1, a second dryer 2, and a third dryer, respectively, a discharge port of the first dryer 1 is connected to a feed port 101 of the second dryer, a discharge port of the second dryer 2 is connected to a feed port of the third dryer, a discharge port 102 of the third dryer 3 is connected to a feed port 404 of a low-heat-value fuel incinerator, the low-heat-value fuel incinerator 4 is provided with an exhaust port 401, the exhaust port 401 is connected to an air inlet of each dryer through an air supply pipeline 5 provided with a cooling air inlet, each dryer is provided with a waste gas outlet 6, the low-heat-value incinerator 4 is provided with a clinker outlet 402 and an air inlet 403, and the air supply pipeline 5 is further provided with a cooling air inlet and a cooling adjusting fan 7.

In this embodiment, the exhaust gas outlet 6 of the dryer is connected to a flue gas purification system.

The low-heating-value incinerator 4 in the embodiment is a hot blast stove for burning 600-2000 calories/kg of low-heating-value fuel.

The utility model discloses utilize mud or oily sludge are dried, are burned and are handled the method that circulation system handled mud or oily sludge, including following step:

s1, before the sludge or the oil sludge is fed into the feeding hole of the first dryer, sorting the sludge or the oil sludge to remove inorganic incombustibles such as cement fragments, metal blocks and the like;

s2, conveying the sludge and the oil sludge into the first dryer 1 for drying treatment, wherein the inorganic incombustibles such as cement fragments and metal blocks are sorted and removed, and the water content of the sludge and the oil sludge is less than or equal to 70%;

s3, the sludge or the oil sludge dried by the first dryer 1 enters the second dryer 2 for drying treatment, and then enters the third dryer 3 for drying treatment;

the drying temperature of each dryer is controlled below 400 ℃;

s4, the sludge or oil sludge with the water content less than 10 percent discharged by the third dryer 3 enters the low-heat-value fuel incinerator 4 for incineration treatment, and the incineration temperature is controlled to be more than 800 ℃.

The utility model discloses the working process is as follows: after sorting treatment, removing incombustibles such as cement fragments and metals, and sludge and oil sludge with water content less than or equal to 70% enter a first dryer 1, high-temperature tail gas discharged from a low-calorific-value fuel incinerator 4 (namely a hot air furnace) is cooled by a cooling adjusting fan 7 through an air supplementing pipeline 5 provided with a cooling air inlet and then is delivered to the first dryer 1, a second dryer 2 and a third dryer 3 for drying water-containing sludge and oil sludge, wherein when materials discharged after the first dryer 1 dries sludge enter the second dryer 2, the water content of the materials is less than 50%, the value of the water content can ensure that the materials entering the second dryer 2 can not be attached to the inner wall of the second dryer 2, the drying efficiency is higher, the materials dried by the second dryer 2 have water content less than 30%, and then enter the third dryer 3 for drying treatment, the water content of the dried material discharged from the discharge port of the third dryer 3 is less than 10%, the discharge port of the third dryer 3 is connected with the feed port of the low-calorific-value fuel incinerator 4, the dried material enters the incinerator for incineration, the low-calorific-value fuel incinerator 4 incinerates the dried material, and then high-temperature hot gas is provided for each dryer, so that the process of closed cycle is completed. The temperature of high-temperature flue gas entering each dryer from the low-heat value fuel incinerator 4 is less than 300 ℃ so as to avoid volatilization and decomposition of most combustible organic matters and oil in sludge and oily sludge, and fuel used by the incinerator can basically maintain the operation of the whole system and provide enough heat by only drying materials of the dryers. The dried material entering the low calorific value incinerator 4 is incinerated and discharged through the ash outlet 402, so that the dried material is convenient to recover and does not cause environmental pollution.

Example 2:

as shown in fig. 2, the present embodiment is different from embodiment 1 in that: in this embodiment, two dryers are provided that are connected to each other.

The rest is the same as example 1.

Example 3:

this example differs from example 1 in that: the low heat value incinerator 4 in the embodiment is a circulating fluidized bed boiler which is used for burning 600-2000 calorie/kg low heat value fuel, and a steam boiler is arranged at the upper part of the circulating fluidized bed boiler.

The rest is the same as example 1.

Example 4:

this example differs from example 1 in that: the low heat value incinerator 4 in the embodiment is a boiling furnace which is used for burning 600-2000 calories/kg of low heat value fuel, and a steam boiler is arranged at the upper part of the boiling furnace.

The rest is the same as example 1.

Various modifications and variations of the present invention may be made by those skilled in the art, and they are within the scope of the present invention provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims (6)

1. A sludge or oil sludge drying and incineration treatment circulating system is characterized in that: the low-calorific-value fuel incinerator is characterized by comprising N dryers which are sequentially connected with one another, namely a discharge port of a first dryer is connected with a feed port of a second dryer, a discharge port of the second dryer is connected with a feed port of a third dryer, the process is analogized in sequence, a discharge port of the N dryer is connected with a feed port of the low-calorific-value fuel incinerator, an exhaust port is arranged on the low-calorific-value incinerator and connected with an air inlet of each dryer through an air supplementing pipeline provided with a cooling air inlet, a waste gas outlet is arranged on each dryer, an ash residue outlet and an air inlet are arranged on the low-calorific-value fuel incinerator, and a cooling adjusting fan is further arranged on the.

2. The sludge or oil sludge drying and incinerating treatment circulating system according to claim 1, wherein: the number of the drying machines is more than or equal to 2 and less than or equal to 5.

3. The sludge or oil sludge drying and incinerating treatment circulating system according to claim 1 or 2, wherein: and a waste gas outlet on the dryer is connected with a flue gas purification system.

4. The sludge or oil sludge drying and incinerating treatment circulating system according to claim 1 or 2, wherein: the low-heat value incinerator is a circulating fluidized bed which is used for burning 600-2000 calorie/kg low-heat value fuel, and a steam boiler is arranged at the upper part of the circulating fluidized bed.

5. The sludge or oil sludge drying and incinerating treatment circulating system according to claim 1 or 2, wherein: the low-heat value incinerator is a hot blast stove for burning 600-2000 calorie/kg low-heat value fuel.

6. The sludge or oil sludge drying and incinerating treatment circulating system according to claim 1 or 2, wherein: the low-heat value incinerator is a boiling furnace which is used for burning 600-2000 calorie/kg low-heat value fuel, and a steam boiler is arranged at the upper part of the boiling furnace.

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