Sludge drying and carbonizing device

Abstract

The utility model relates to the technical field of sludge treatment, in particular to a sludge drying and carbonizing device which comprises a sludge storage bin, a sludge drying machine, a dust remover, a circulating fan, a dehumidification washing tower, a secondary combustion furnace and a carbonizing furnace, wherein an outlet of the sludge storage bin is connected with a first inlet pipeline of the sludge drying machine, a first outlet of the sludge drying machine is connected with an inlet pipeline of the dust remover, a first outlet of the dust remover is connected with an inlet pipeline of the circulating fan, and an outlet of the circulating fan is connected with a first inlet pipeline of the dehumidification washing tower; an outlet of the dehumidification washing tower is connected with a first inlet pipeline of the secondary combustion furnace, and an outlet of the secondary combustion furnace is connected with a first inlet pipeline of the carbonization furnace; the treatment cost is reduced, efficient, environment-friendly and resourceful treatment of the sludge is realized, and remarkable reduction, resourceful and environment-friendly benefits and energy utilization efficiency improvement are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge drying and carbonizing device. Background Art

[0002] At present, the commonly used sludge disposal methods mainly include land utilization, building material utilization and sanitary landfill, and the corresponding treatment technologies include anaerobic digestion of sludge, aerobic fermentation, drying incineration and deep dehydration, gradually forming a diversified treatment and disposal method.

[0003] Compared with traditional sludge treatment technologies such as composting and incineration, sludge carbonization offers advantages in terms of efficient energy utilization, resource utilization, and greenhouse gas emission reduction. Therefore, sludge carbonization technology has gradually become a research hotspot and a new development direction in the field of sludge treatment internationally.

[0004] The utility model aims to provide a sludge drying and carbonization device, which exhibits certain advantages in efficient energy utilization, resource utilization and greenhouse gas emission control through reasonable energy recovery and utilization. Utility Model Content

[0005] The purpose of this utility model is to provide a device for sludge drying and carbonization in order to address the shortcomings of the existing technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a sludge drying and carbonizing device, comprising: a sludge storage bin, a sludge dryer, a dust collector, a circulating fan, a dehumidifying washing tower, a secondary combustion furnace, and a carbonization furnace; wherein,

[0008] The outlet of the sludge storage bin is connected to the first inlet pipeline of the sludge dryer, the first outlet of the sludge dryer is connected to the inlet pipeline of the dust collector, the first outlet of the dust collector is connected to the inlet pipeline of the circulation fan, the outlet of the circulation fan is connected to the first inlet pipeline of the dehumidification scrubber, the outlet of the dehumidification scrubber is connected to the first inlet pipeline of the secondary combustion furnace, and the outlet of the secondary combustion furnace is connected to the first inlet pipeline of the carbonization furnace;

[0009] The first outlet of the carbonization furnace is connected to the first inlet pipeline of the first heat exchanger, the second outlet of the carbonization furnace is connected to the second inlet pipeline of the secondary combustion furnace, the first outlet of the first heat exchanger is connected to the first inlet pipeline of the second heat exchanger, the first outlet of the second heat exchanger is connected to the inlet pipeline of the bag filter, and the first outlet of the bag filter is connected to the inlet pipeline of the chimney;

[0010] The second outlet of the sludge dryer is connected to the inlet pipeline of the drying sludge hopper through the first drying sludge conveyor, and the first outlet of the drying sludge hopper is connected to the second inlet pipeline of the carbonization furnace through the second drying sludge conveyor;

[0011] The third outlet of the carbonization furnace is connected to the inlet pipeline of the carbide storage bin through the carbide conveyor.

[0012] Preferably, it also includes: a hot air generator; wherein,

[0013] The discharge port of the circulating fan is also connected to the second inlet pipeline of the first heat exchanger, the second outlet of the first heat exchanger is connected to the first inlet pipeline of the hot air reverse furnace, and the outlet of the hot air generator is connected to the second inlet pipeline of the sludge dryer.

[0014] Preferably, the second outlet of the dust collector is connected to the feed inlet pipeline of the drying sludge hopper through the first drying sludge conveyor.

[0015] Preferably, the outlet of the combustion air blower is connected to the inlet pipeline of the second heat exchanger, and the second outlet of the second heat exchanger is respectively connected to the combustion air feed port of the secondary combustion furnace and the combustion air inlet pipeline of the hot air generator.

[0016] Preferably, the outlet of the bag filter is connected to the feed inlet pipeline of the chimney through an induced draft fan and a muffler in sequence.

[0017] Preferably, the outlet of the activated carbon supply device, the outlet of the slaked lime supply device, and the outlet of the reagent supply blower are respectively connected to the inlet pipeline of the bag filter.

[0018] Preferably, the first heat exchanger and the second heat exchanger are both shell-and-tube heat exchangers.

[0019] Preferably, the sludge dryer is a horizontal drum dryer.

[0020] Preferably, it also includes: a sodium hydroxide storage tank; wherein,

[0021] The outlet of the sodium hydroxide storage tank is connected to the second inlet pipeline of the dehumidification washing tower.

[0022] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0023] The utility model reduces the moisture content of sludge from the initial 60% to 80% to 15% through drying treatment, greatly reducing the volume and weight of sludge, facilitating subsequent transportation, storage and treatment, and effectively alleviating the pressure of sludge treatment and disposal; the dried sludge further enters the carbonization furnace for carbonization treatment and is converted into high-value-added carbide products; the distillation gas generated during the carbonization process is effectively collected and sent to the secondary combustion chamber for full combustion. The utility model not only avoids the direct emission of harmful gases, but also realizes energy recycling through the heat generated by combustion; the waste heat generated by carbonization and combustion is fully utilized, providing the necessary heat source for the drying and carbonization process of the sludge, realizing the cascade utilization and recycling of energy, significantly improving energy utilization efficiency, reducing treatment costs, and realizing efficient, environmentally friendly and resource-based treatment of sludge, with significant volume reduction, resource utilization, environmental protection benefits and improved energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the sludge drying and carbonization device;

[0025] The accompanying drawings of the present invention are as follows:

[0026] Sludge storage silo 1; sludge dryer 2; dust collector 3; circulating fan 4; dehumidification scrubber 5; secondary combustion furnace 6; carbonization furnace 7; first heat exchanger 8; bag filter 9; chimney 10; first dry sludge conveyor 11; dry sludge hopper 12; carbide conveyor 13; carbide storage silo 14; hot air generator 15; second heat exchanger 16; slaked lime supply device 17; activated carbon supply device 18; reagent supply fan 19; induced draft fan 20; silencer 21. DETAILED DESCRIPTION

[0027] The specific implementation of the present utility model will be described in detail below.

[0028] Unless otherwise defined, the technical or scientific terms used in the claims and the specification shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0029] The words "include" or similar used in the description and claims of this utility model patent application mean that the items before "include" include the items listed after "include" or their equivalents, and do not exclude other items.

[0030] The numerical values ​​mentioned in the present invention include all numerical values ​​that increase by one unit from the lowest to the highest, assuming that there are at least two units between any lower value and the higher value. For example, if a component or a physical quantity is said to be from 1 to 100, preferably from 10 to 90, and most preferably from 20 to 80, it is intended to express that values ​​such as 5 to 95, 14 to 76, 23 to 67, 32 to 58, and 41 to 49 are clearly listed in this specification; for values ​​less than 1, 0.0001, 0.001, 0.01, or 0.1 are considered to be more appropriate units. The above examples are for illustrative purposes only. In fact, all numerical combinations between the lowest value and the highest value listed are considered to be clearly listed in this specification in a similar manner.

[0031] Example

[0032] This embodiment provides a sludge drying and carbonization device, comprising: a sludge storage bin 1, a sludge dryer 2, a dust collector 3, a circulating fan 4, a dehumidification scrubber 5, a secondary combustion furnace 6, a carbonization furnace 7, a hot air generator 15, and a sodium hydroxide storage tank; wherein,

[0033] The outlet of the sludge storage bin 1 is connected to the first inlet pipeline of the sludge dryer 2, the first outlet of the sludge dryer 2 is connected to the inlet pipeline of the dust collector 3, the first outlet of the dust collector 3 is connected to the inlet pipeline of the circulation fan 4, the outlet of the circulation fan 4 is connected to the first inlet pipeline of the dehumidification scrubber 5, the outlet of the dehumidification scrubber 5 is connected to the first inlet pipeline of the secondary combustion furnace 6, and the outlet of the secondary combustion furnace 6 is connected to the first inlet pipeline of the carbonization furnace 7;

[0034] The first outlet of the carbonization furnace 7 is connected to the first inlet pipeline of the first heat exchanger 8, the second outlet of the carbonization furnace 7 is connected to the second inlet pipeline of the secondary combustion furnace 6, the first outlet of the first heat exchanger 8 is connected to the first inlet pipeline of the second heat exchanger 16, the first outlet of the second heat exchanger 16 is connected to the inlet pipeline of the bag filter 9, and the first outlet of the bag filter 9 is connected to the inlet pipeline of the chimney 10;

[0035] The second outlet of the sludge dryer 2 is connected to the inlet pipeline of the drying sludge hopper 12 through the first drying sludge conveyor 11, and the first outlet of the drying sludge hopper 12 is connected to the second inlet pipeline of the carbonization furnace 7 through the second drying sludge conveyor;

[0036] The third outlet of the carbonization furnace 7 is connected to the inlet pipeline of the carbide storage bin 14 through the carbide conveyor 13 .

[0037] Among them, the sludge dryer 2, the dehumidification washing tower 5, the carbide conveyor 13, and the bag dust collector 9 are connected to the cooling water system through pipelines;

[0038] Among them, the discharge port of the circulating fan 4 is also connected to the second inlet pipeline of the first heat exchanger 8, the second outlet of the first heat exchanger 8 is connected to the first inlet pipeline of the hot air reaction furnace 15, and the outlet of the hot air generator 15 is connected to the second inlet pipeline of the sludge dryer 2.

[0039] The second outlet of the dust collector 3 is connected to the feed port pipeline of the drying sludge hopper 12 through the first drying sludge conveyor 11 .

[0040] The outlet of the combustion air blower is connected to the inlet pipeline of the second heat exchanger 16 , and the second outlet of the second heat exchanger 16 is connected to the combustion air feed port of the secondary combustion furnace 6 and the combustion air inlet pipeline of the hot air generator 15 .

[0041] Among them, the outlet of the bag dust collector 9 is connected to the feed inlet pipeline of the chimney 10 through the induced draft fan 20 and the muffler 21 in sequence. The induced draft fan can reduce the equipment resistance of the flue, carbonization furnace 7, the first heat exchanger 8, the second heat exchanger 16, and the bag dust collector 9.

[0042] The outlet of the activated carbon supply device 18 , the outlet of the slaked lime supply device 17 , and the outlet of the reagent supply blower 19 are respectively connected to the inlet pipeline of the bag filter 9 .

[0043] Wherein, the outlet of the sodium hydroxide storage tank is connected to the second inlet pipeline of the dehumidification washing tower 5.

[0044] The first heat exchanger 8 and the second heat exchanger 16 are both shell-and-tube heat exchangers.

[0045] Wherein, the sludge dryer 2 is a horizontal drum dryer.

[0046] As a preferred embodiment, a pressure release port is provided near the outlet of the sludge dryer 2. When the pressure inside the sludge dryer 2 at the outlet increases, the pressure can be safely released to the outside without damaging the equipment.

[0047] During use, the sludge is transported to the sludge dryer 2 for drying treatment. The exhaust gas generated during the treatment process is passed through the pipeline through the dust collector 3 for cyclone dust removal. The exhaust gas after dust removal is passed through the pipeline through the circulating fan 4, and part of it enters the interior of the dehumidification washing tower 5. The other part is heated by the first heat exchanger 8 through the pipeline and enters the hot air generator 15 for combustion air circulation. The exhaust gas entering the interior of the dehumidification washing tower 5, wherein the dehumidification washing tower 5 has cooling water, which circulates and cools the exhaust gas, condenses the water vapor in the exhaust gas into water and precipitates it, and then passes through the demister for further demisting. The moisture content of the exhaust gas after dehumidification and washing is greatly reduced. In order to reduce the load of subsequent exhaust gas treatment, the dehumidified exhaust gas enters the secondary combustion chamber 6 for secondary combustion. Part of the exhaust gas after combustion meets the emission standards and can be directly discharged, and the other part enters the carbonization furnace 7 to provide heat. The sludge dried by the sludge dryer 2 passes through the first dry sludge conveyor 11 and the dry sludge hopper 12 The carbonized sludge enters the carbonization furnace 7 for carbonization. The carbonized sludge is transported to the carbonization storage bin 14 through the carbonization conveyor 13. The dry distillation gas generated during the carbonization process is a combustible gas. The dry distillation gas generated from the carbonization furnace 7 of the carbonization equipment contains certain harmful substances. It enters the secondary combustion chamber 6 and burns to a temperature above 850°C, providing heat energy for the carbonization furnace 6, reducing the use of auxiliary fuel, and converting harmful substances into completely oxidized flue gas. After heat utilization and complete combustion of the flue gas, the flue gas is heated and discharged. The waste gas after the use and complete combustion passes through the first heat exchanger 8 and the second heat exchanger 16 through the pipeline and then enters the bag dust collector 9 for dust removal. It is adsorbed and deacidified through the activated carbon supply device 18, the slaked lime supply device 17, and the reagent supply fan 19. The treated waste gas passes through the induced draft fan 20 and the muffler 21 in sequence through the pipeline and is discharged from the chimney. The other part of the waste gas enters the hot air generator 15, and after being treated in the hot air generator 15, it returns to the sludge dryer 2 for heat circulation.

[0048] To sum up, the utility model reduces the moisture content of sludge from the initial 60% to 80% to 15% through drying treatment, greatly reducing the volume and weight of sludge, facilitating subsequent transportation, storage and treatment, and effectively alleviating the pressure of sludge treatment and disposal; the dried sludge further enters the carbonization furnace for carbonization treatment and is converted into high-value-added carbide products; the distillation gas generated during the carbonization process is effectively collected and sent to the secondary combustion chamber for full combustion. The utility model not only avoids the direct emission of harmful gases, but also realizes energy recycling through the heat generated by combustion; the waste heat generated by carbonization and combustion is fully utilized, providing the necessary heat source for the drying and carbonization process of the sludge, realizing the cascade utilization and recycling of energy, significantly improving energy utilization efficiency, reducing treatment costs, and realizing efficient, environmentally friendly, and resource-based treatment of sludge, with significant reduction, resource utilization, environmental protection benefits and improved energy utilization efficiency.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge drying and carbonization device, characterized in that: include: Sludge storage bin (1), sludge dryer (2), dust collector (3), circulating fan (4), dehumidification scrubber (5), secondary combustion furnace (6), and carbonization furnace (7); wherein, The outlet of the sludge storage bin (1) is connected to the first inlet pipeline of the sludge dryer (2), the first outlet of the sludge dryer (2) is connected to the inlet pipeline of the dust collector (3), the first outlet of the dust collector (3) is connected to the inlet pipeline of the circulation fan (4), the outlet of the circulation fan (4) is connected to the first inlet pipeline of the dehumidification scrubber (5), the outlet of the dehumidification scrubber (5) is connected to the first inlet pipeline of the secondary combustion furnace (6), and the outlet of the secondary combustion furnace (6) is connected to the first inlet pipeline of the carbonization furnace (7); The first outlet of the carbonization furnace (7) is connected to the first inlet pipeline of the first heat exchanger (8), the second outlet of the carbonization furnace (7) is connected to the second inlet pipeline of the secondary combustion furnace (6), the first outlet of the first heat exchanger (8) is connected to the first inlet pipeline of the second heat exchanger (16), the first outlet of the second heat exchanger (16) is connected to the inlet pipeline of the bag filter (9), and the first outlet of the bag filter (9) is connected to the inlet pipeline of the chimney (10); The second outlet of the sludge dryer (2) is connected to the inlet pipeline of the drying sludge hopper (12) through the first drying sludge conveyor (11), and the first outlet of the drying sludge hopper (12) is connected to the second inlet pipeline of the carbonization furnace (7) through the second drying sludge conveyor; The third outlet of the carbonization furnace (7) is connected to the inlet pipeline of the carbide storage bin (14) via the carbide conveyor (13).

2. The sludge drying and carbonization device according to claim 1, characterized in that: Also includes: Hot air generator (15); wherein, The discharge port of the circulating fan (4) is also connected to the second inlet pipeline of the first heat exchanger (8), the second outlet of the first heat exchanger (8) is connected to the first inlet pipeline of the hot air generator (15), and the outlet of the hot air generator (15) is connected to the second inlet pipeline of the sludge dryer (2).

3. The sludge drying and carbonization device according to claim 1, characterized in that: The second outlet of the dust collector (3) is connected to the feed inlet pipeline of the drying sludge hopper (12) via the first drying sludge conveyor (11).

4. The sludge drying and carbonization device according to claim 2, characterized in that: The outlet of the combustion air blower is connected to the inlet pipeline of the second heat exchanger (16), and the second outlet of the second heat exchanger (16) is respectively connected to the combustion air feed port of the secondary combustion furnace (6) and the combustion air inlet pipeline of the hot air generator (15).

5. The sludge drying and carbonization device according to claim 1, characterized in that: The outlet of the bag filter (9) is connected to the feed inlet pipeline of the chimney (10) through the induced draft fan (20) and the muffler (21) in sequence.

6. The sludge drying and carbonization device according to claim 1, characterized in that: The outlet of the activated carbon supply device (18), the outlet of the slaked lime supply device (17), and the outlet of the reagent supply blower (19) are respectively connected to the inlet pipeline of the bag filter (9).

7. The sludge drying and carbonization device according to claim 4, characterized in that: The first heat exchanger (8) and the second heat exchanger (16) are both shell-and-tube heat exchangers.

8. The sludge drying and carbonization device according to claim 1, characterized in that: The sludge dryer (2) is a horizontal drum dryer.

9. The sludge drying and carbonization device according to claim 1, characterized in that: Also includes: sodium hydroxide Storage tanks; The outlet of the sodium hydroxide storage tank is connected to the second inlet pipeline of the dehumidification scrubber (5).

Images