CN218778828U

CN218778828U - Sludge drying machine and sludge treatment system

Info

Publication number: CN218778828U
Application number: CN202222866327.XU
Authority: CN
Inventors: 江武; 于立松; 赵维维
Original assignee: Zhe Jiang Eco Environmental Technology Co ltd
Current assignee: Zhe Jiang Eco Environmental Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-31
Anticipated expiration: 2032-10-28

Abstract

The utility model relates to a sludge treatment technical field, in particular to sludge drying machine and sludge treatment system. The sludge drier comprises a shell and a conveying shaft positioned in the shell, wherein a driving part and a heat source supply part are arranged outside the shell, the shell is provided with an air outlet, the air outlet is connected with an air outlet pipe, the shell is provided with an air inlet pipe, the air inlet pipe is provided with a carrier gas outlet, the number of the air outlets is at least 1, each air outlet is provided with a corresponding air outlet pipe, and all the air outlet pipes are connected with a collecting pipe; the air inlet pipe extends to the inside of the shell, and the carrier gas outlets are located inside the shell and are more than 1 in number. The utility model provides the high mummification efficiency of mud has reduced the probability that the mummification air condenses the back flow to the desiccation furnace simultaneously.

Description

Sludge drying machine and sludge treatment system

Technical Field

The utility model relates to a sludge treatment technical field, in particular to sludge drying machine and sludge treatment system.

Background

The pyrolysis technology plays an important role in the aspects of recycling, reduction and harmlessness of the sludge. However, the water content of the sludge is generally relatively high, so the sludge is usually dried before pyrolysis. For example, chinese patent document CN 211734157U discloses a closed indirect heat exchange sludge drying system, which includes a drying machine, an exhaust gas treatment unit, and a carrier gas reflux unit, wherein a dried gas generated by drying sludge in the drying machine is purified by the exhaust gas treatment unit, and then is heated by the carrier gas reflux unit, and finally a part of the dried gas is refluxed into the drying machine as a replacement carrier gas containing wet dried gas in the drying machine. The replacement of the carrier gas is beneficial to increasing the speed of the wet and dry gas discharged out of the drying machine, and the carrier gas has higher temperature, so that the drying gas mixed with the high-temperature carrier gas is not easy to condense and reflux in an air outlet pipe of the drying gas, and compared with a drying furnace without the carrier gas, the scheme of the carrier gas has higher drying efficiency.

Disclosure of Invention

The utility model discloses an aim at overcoming the above-mentioned defect that prior art exists, provide a sludge drying machine and sludge treatment system, when improving sludge drying efficiency, reduce the probability that flows back to the dry stove behind the dry gas condensation.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the sludge drier comprises a shell and a conveying shaft positioned in the shell, wherein a driving part and a heat source supply part are arranged outside the shell, the shell is provided with an air outlet, the air outlet is connected with an air outlet pipe, the shell is provided with an air inlet pipe, the air inlet pipe is provided with a carrier gas outlet, the number of the air outlets is at least 1, each air outlet is provided with a corresponding air outlet pipe, and all the air outlet pipes are connected to a collecting pipe; the air inlet pipe extends to the inside of the shell, and the carrier gas outlets are located inside the shell and are more than 1 in number.

The inventive concept of the invention is that:

in the prior art, the sludge drying machine usually has only one air outlet, and all drying gas can be led out from only one air outlet, so that the leading-out speed of the drying gas is relatively low, and the retention time of high-temperature carrier gas in the drying gas is relatively long. The drying gas guiding device is provided with the gas outlets and the carrier gas outlets, so that the drying gas can be guided out in time, and the drying gas guiding speed can be improved. Meanwhile, the retention time of the carrier gas in the shell can be reduced, so that the high temperature of the carrier gas is kept, and the dried gas is not easy to condense in the gas outlet pipe. Through the arrangement of the plurality of gas outlets and the plurality of carrier gas outlets, the efficiency of sludge drying is improved, and the probability of the drying gas flowing back to the drying furnace after being condensed is favorably reduced.

As a modification, the conveying shaft is in a hollow form, the heat source supply part is an external steam generator, and the steam generator is communicated with the hollow interior of the conveying shaft.

As a modification, the heat source supply part is a jacket arranged outside the shell, and the jacket is communicated with the heat medium.

As a modification, the difference between the number of the gas outlets and the number of the carrier gas outlets is not more than 2, so that the balance between the gas outlet and the gas inlet is kept.

As an improvement, the outlet pipe extends into the collecting pipe, and the height of the outlet pipe positioned in the collecting pipe is 1/3-1/2 of the diameter of the collecting pipe. And the liquid product is prevented from flowing back to the drying furnace through the air outlet pipe after the drying gas is cooled in the collecting pipe.

As an improvement, the collecting pipe is obliquely arranged, the inclination angle is 5-15 degrees, and the oblique arrangement is favorable for discharging the accelerated drying gas.

The invention also provides a sludge treatment system, which comprises a drying device, a pyrolysis device and a combustion device, wherein the drying device is communicated with the pyrolysis device through a sludge conveying pipeline, hot flue gas generated by the combustion device supplies heat to the pyrolysis device, the drying device comprises a shell and a conveying shaft positioned in the shell, the shell is provided with an air outlet, the air outlet is connected with an air outlet pipe, the shell is provided with an air inlet pipe, the air inlet pipe is provided with a carrier gas outlet, the number of the air outlets is at least 1, each air outlet is provided with a corresponding air outlet pipe, and all the air outlet pipes are connected to a collecting pipe; the intake pipe extends to inside the casing, and the carrier gas export is located inside the casing and quantity is greater than 1.

As an improvement, the drying device is sequentially communicated with a spray tower and a condenser at the air outlet end thereof, and dust and water vapor in the drying gas are removed through spraying and condensation.

As an improvement, the air outlet end of the condenser is respectively communicated with a drying gas combustion pipeline and a drying gas circulation pipeline, the drying gas combustion pipeline is connected with a combustion device, the drying gas circulation pipeline is connected with an air inlet pipe, namely, a part of drying gas is combusted in the combustion device, and a part of drying gas is used as carrier gas.

As an improvement, the pyrolysis device is provided with a flue gas leading-out pipeline, a primary heat exchanger for exchanging heat with combustion-supporting air and a secondary heat exchanger for exchanging heat with drying gas are sequentially arranged on the flue gas leading-out pipeline, and the drying gas exchanges heat with the flue gas to improve the temperature of the drying gas.

As an improvement, the pyrolysis device is an indirect heat desorption furnace adopting jacket heating.

In conclusion, the sludge drying device improves the sludge drying efficiency and reduces the probability that the drying gas flows back to the drying furnace after being condensed through the arrangement of the plurality of gas outlets and the plurality of carrier gas outlets.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic structural view of the sludge drying machine of the present invention;

in the figure: 10. a drying device; 11. a housing; 12. an air outlet; 13. an air outlet pipe; 14. a header; 15. an air inlet pipe; 16. a carrier gas outlet; 17. a drive member; 20. A pyrolysis device; 30. a combustion device; 40. a spray tower; 50. A condenser; 60. a primary heat exchanger; 70. a secondary heat exchanger.

Detailed Description

Example 1

As shown in fig. 1, the main bodies of the sludge treatment system of the present invention are a drying device 10, a pyrolysis device 20 and a combustion device 30. The hot flue gas generated by the combustion device 30 provides heat to the pyrolysis device 20. The drying device 10 is sequentially provided with a spray tower 40 and a condenser 50 to purify the drying gas. The pyrolysis apparatus 20 is an indirect heat desorption furnace using jacket heating. The pyrolysis device 20 is provided with a flue gas leading-out pipeline, and a primary heat exchanger 60 and a secondary heat exchanger 70 are sequentially arranged on the flue gas leading-out pipeline.

The working process comprises the following steps: the sludge with the water content of 60-80% firstly enters a drying machine for drying, and dried gas generated in the drying process sequentially enters a spray tower and a condenser. And conveying the dried sludge into a pyrolysis device for pyrolysis. Pyrolysis gas generated in the pyrolysis process enters the combustion device to be combusted so as to generate flue gas, and the flue gas is introduced into a jacket of the pyrolysis device to supply heat to the pyrolysis device. After that, the flue gas exchanges heat with combustion-supporting air through a first-stage heat exchanger on the flue gas leading-out pipeline, and then exchanges heat with the purified drying gas through a second-stage heat exchanger. The temperature of the dried gas after heat exchange is 110-120 ℃, one part of the dried gas after heat exchange enters the drying device through a dried gas circulation pipeline to be used as carrier gas in the drying process, and the other part of the dried gas enters the combustion device through a dried gas combustion pipeline to be combusted.

The drying device 10 is a sludge drying machine. As shown in fig. 2, the main body of the sludge drying machine is a casing 11. The housing 11 is provided with a plurality of outlet ports 12, each outlet port 12 is provided with a corresponding outlet pipe 13, and all the outlet pipes 13 are connected to a collecting pipe 14. The header 14 is arranged obliquely at an angle of 5-15. The outlet pipe 13 extends into the header 14, and the height of the outlet pipe 13 in the header 14 is 1/3-1/2 of the diameter of the header 14. The shell 11 is provided with an air inlet pipe 15, the air inlet pipe 15 extends to the inside of the shell 11, a plurality of carrier gas outlets 16 are arranged on the air inlet pipe 15, and the carrier gas outlets 16 are positioned inside the shell 11. The difference between the number of the gas outlets 12 and the number of the carrier gas outlets 16 is not more than 2. Furthermore, a conveying shaft (not shown) is arranged in the housing 11, the conveying shaft is hollow, a driving part 17 and a heat source supplying part (not shown) are arranged outside the housing 11, the heat source supplying part is a steam generator, and the steam generator is communicated with the hollow interior of the conveying shaft, which is similar to the paddle dryer in the prior art and is not described in detail herein.

Example 2

The present embodiment is different from embodiment 1 in that:

the heat source supply part is a jacket arranged outside the shell, and a heat medium is introduced into the jacket. Compared with the embodiment 1, the jacket can heat and preserve heat of the air outlet pipe 13.

Claims

1. Sludge drying machine, including casing and the transport axle that is located the casing, the casing is equipped with driver part and heat source supply unit outward, and the casing has the gas outlet, and the gas outlet is connected with the outlet duct, and the casing is furnished with the intake pipe, and the intake pipe has carrier gas export, its characterized in that: at least 1 air outlet is provided, each air outlet is provided with a corresponding air outlet pipe, and all the air outlet pipes are connected with a collecting pipe; the intake pipe extends to inside the casing, and the carrier gas export is located inside the casing and quantity is greater than 1.

2. The sludge drying machine according to claim 1, characterized in that: the conveying shaft is in a hollow form, the heat source supply part is an external steam generator, and the steam generator is communicated with the hollow interior of the conveying shaft.

3. The sludge drying machine of claim 1, wherein: the heat source supply part is a jacket arranged outside the shell, and the jacket is communicated with the heat medium.

4. The sludge drying machine of claim 1, wherein: the difference between the number of the air outlets and the number of the carrier gas outlets is not more than 2.

5. The sludge drying machine of claim 1, wherein: the air outlet pipe extends into the collecting pipe, and the height of the air outlet pipe positioned in the collecting pipe is 1/3-1/2 of the diameter of the collecting pipe.

6. The sludge drying machine according to claim 1, characterized in that: the collecting pipes are arranged obliquely, and the inclination angle is 5-15 degrees.

7. Sludge treatment system, including mummification device, pyrolysis device, burner, mummification device and pyrolysis device pass through sludge conveying pipeline intercommunication, and the hot flue gas that burner produced is pyrolysis device heat supply, and the mummification device includes the casing and is located the transport axle of casing, and the casing has the gas outlet, and the gas outlet is connected with the outlet duct, and the casing is furnished with the intake pipe, and the intake pipe has carrier gas outlet, its characterized in that: at least 1 air outlet is provided, each air outlet is provided with a corresponding air outlet pipe, and all the air outlet pipes are connected with a collecting pipe; the air inlet pipe extends to the inside of the shell, and the carrier gas outlets are located inside the shell and are more than 1 in number.

8. The sludge treatment system of claim 7, wherein: the drying device is sequentially communicated with a spray tower and a condenser at the air outlet end.

9. The sludge treatment system of claim 8, wherein: the condenser is respectively communicated with a drying gas combustion pipeline and a drying gas circulation pipeline at the gas outlet end of the condenser, the drying gas combustion pipeline is connected with the combustion device, and the drying gas circulation pipeline is connected with the gas inlet pipe.

10. The sludge treatment system of claim 9, wherein: the pyrolysis device is provided with a flue gas leading-out pipeline, and a primary heat exchanger for exchanging heat with combustion-supporting air and a secondary heat exchanger for exchanging heat with drying gas are sequentially arranged on the flue gas leading-out pipeline.

11. The sludge treatment system of claim 7, wherein: the pyrolysis device is an indirect heat desorption furnace heated by a jacket.