CN105174678A

CN105174678A - Pyrolysis treatment process for domestic sludge

Info

Publication number: CN105174678A
Application number: CN201510544801.9A
Authority: CN
Inventors: 单文奎
Original assignee: CHONGQING DAN XIA ENERGY SAVING TECHNOLOGY Co Ltd
Current assignee: ANHUI ZHUOXIN CLEAN ENERGY TECHNOLOGY CO., LTD.
Priority date: 2015-08-31
Filing date: 2015-08-31
Publication date: 2015-12-23
Anticipated expiration: 2035-08-31
Also published as: CN105174678B

Abstract

The invention discloses a pyrolysis treatment process for domestic sludge. The process comprises: sludge is fed into a dehydrator through a sludge pump to be dehydrated; the dehydrated sludge is fed into a pyrolyzing furnace; high-temperature flue gas generated by combustion in a hot air producer indirectly enters a destructive distillation section of the pyrolyzing furnace, and then flue gas of the destructive distillation section directly enters a preheating drying section; the flue gas that enters the preheating drying section is subjected to heat dissipation and is dedusted and discharged; the flue gas that enters the destructive distillation section is mixed with dry distillation gas and the mixture enters a high-temperature gas purifier; tar and saturated water coal gas are separated out through a purification system; and sludge carbon is cooled through circulating saturated water coal gas and is discharged. The sludge pyrolytic technique adopted by the process is an effective way for sludge reduction, stabilization, harmless treatment and resource utilization, and has the advantages of high utilization ratio of energy sources, high volume reduction rate and low operating cost; after combustion, the amount of exhaust gas needed to be treated is small; sludge needs not to be buried, and an incomplete incineration process is converted into a gas complete combustion process, so that the discharge amount of sludge carbon solid particulate matters is extremely small, and the process is more environmental-friendly.

Description

Domestic sludge pyrolysis processing technique

Technical field

The present invention relates to one way of life sludge treatment technique, particularly relate to one way of life pyrolyzing sludge treatment process.

Background technology

Current domestic sludge is all processed by the mode of landfill, and the organism in domestic sludge cannot decompose, and easily produces secondary pollution.

Summary of the invention

For weak point of the prior art, the invention provides and a kind ofly effectively can carry out pyrolysis to the organism in domestic sludge, the domestic sludge pyrolysis processing technique of more environmental protection.

In order to solve the problems of the technologies described above, present invention employs following technical scheme:

Domestic sludge pyrolysis processing technique, this technique comprises the steps:

1) open sludge pump, mud is sent into water extracter by sludge pump, and water extracter inputs lift by after sludge dewatering, and lift is by the sludge lifting after dehydration and be input to the top of pyrolysis oven;

2) axially arranges stir shaft along it in pyrolysis oven, uniformly on stir shaft arrange agitating vane, motor drives stir shaft to drive agitating vane to stir in pyrolysis oven; Be divided into three sections from top to bottom in pyrolysis oven, epimere is preheating and drying section, and stage casing is retort section, and hypomere is cooling section;

3) mud after dehydration carries out drying in the preheating and drying section of pyrolysis oven, organic matter pyrolysis in mud after retort section inner drying becomes inflammable gas, the flue gas HYBRID RETORTING gas input high temperature gas cleaning device dedusting produced in retort section, pass into pyrolysis gas purification furnace by high temperature gas cleaning device purified gas and isolate tar, the saturation water coal gas in pyrolysis gas purification furnace is extracted out again by gas fan, a saturation water coal gas part supplies outward, part saturation water coal gas input heat blower combustion, another part saturation water coal gas passes in the cooling section in pyrolysis oven and cools the mud carbon after pyrolysis,

4) mud after the preheating and drying section drying and dehydrating that the high-temperature flue gas part produced after heat blower combustion passes in pyrolysis oven, another part passes into retort section in pyrolysis oven for pyrolysis provides heat energy;

5) the mud carbon that the retort section in pyrolysis oven produces is discharged from the bottom of pyrolysis oven after cooling section cooling;

6) discharge from the top of pyrolysis oven after entering the flue gas heat radiation of preheating and drying section in pyrolysis oven, and arrange outward after smoke duster dedusting.

As a preferred embodiment of the present invention, described heat blower is connected with the air outlet tube of blower fan, is blown in heat blower by blower fan.

Compared with prior art, domestic sludge pyrolysis processing technique tool has the following advantages:

1, the pyrolyzing sludge technology that this technique adopts is the effective way of sludge reduction, stabilization, innoxious, resource utilization.

2, this technique is a green, does not have the thermal treatment technology of secondary pollution; Energy utilization rate is high, volume reduction rate is high, working cost is low; Fundamentally solve Heavy Metals in Sludge problem; After burning, need exhausted air quantity to be processed little, reclaim renewable energy source.

3, this technique adopts pyrolytic technique, without the need to landfill, incomplete burning process is changed into gas perfect combustion process, makes mud carbon solid particulate matter quantity discharged few, more environmental protection.

Accompanying drawing explanation

Fig. 1 is the schema of life pyrolyzing sludge treatment process;

Fig. 2 is the structural representation of life pyrolyzing sludge process.

In figure: 1-sludge pump; 2-water extracter; 3-lift; 4-pyrolysis oven; 41-preheating and drying section; 42-retort section; 43-cooling section; 5-stir shaft; 6-agitating vane; 7-motor; 8-heat blower; 9-smoke duster; 10-high temperature gas cleaning device; 11-pyrolysis gas purification furnace; 12-tar; 13-gas fan; 14-blower fan.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

Fig. 1 is the schema of life pyrolyzing sludge treatment process, and Fig. 2 is the structural representation of life pyrolyzing sludge process, and domestic sludge pyrolysis processing technique comprises the steps:

1) open sludge pump 1, mud is sent into water extracter 2 by sludge pump 1, and water extracter 2 will input lift 3 after sludge dewatering, and lift 3 is by the sludge lifting after dehydration and be input to the top of pyrolysis oven 4.

2) axially arranges stir shaft 5 along it in pyrolysis oven 4, uniformly on stir shaft 5 arrange agitating vane 6, motor 7 drives stir shaft 5 to drive agitating vane 6 to stir in pyrolysis oven 4; Be divided into three sections from top to bottom in pyrolysis oven 4, epimere is preheating and drying section 41, and stage casing is retort section 42, and hypomere is cooling section 43.

3) mud after dehydration adds from furnace roof portion by sealing sealing buffer bin enters pyrolysis oven again preheating and drying section 41 through sealing feeder, and the mud after dehydration carries out drying in the preheating and drying section 41 of pyrolysis oven 4; Mud after dehydration is moved downward by agitating vane 6, the mud that 700 degree of high-temperature flue gas that heat blower 8 below produces enter in preheating and drying section 41 and after dehydration carries out heat exchange, improve mud temperature, decrease the load of mud device for quickly elevating temperature, high-temperature flue gas heat radiation in preheating and drying section 41 is down to 200 degree and is entered in smoke duster 9 with the steam that preheating and drying section 41 produces and processes, and processes rear outer row up to standard.

Mud after heating up in preheating and drying section 41 is driven by agitating vane 6 and continues to move downward, the 700 degree of high-temperature flue gas produced with heat blower 8 below meet again, organic matter pyrolysis in mud becomes the inflammable gas (i.e. flue gas HYBRID RETORTING gas) of 500 degree, flue gas HYBRID RETORTING gas input high temperature gas cleaning device 10 dedusting produced in retort section 42, pass into pyrolysis gas purification furnace 11 by high temperature gas cleaning device 10 purified gas and isolate tar 12, extracted out the saturation water coal gas in pyrolysis gas purification furnace 11 again by gas fan 13, the saturation water coal gas extracted out is at about 40 degree, a saturation water coal gas part supplies outward, part saturation water coal gas input heat blower 8 combustion, another part saturation water coal gas passes in the cooling section 43 in pyrolysis oven 4 and cools the mud carbon after pyrolysis.

4) heat blower 8 is connected with the air outlet tube of blower fan 14, is blown in heat blower 8 by blower fan 14.Mud after preheating and drying section 41 drying and dehydrating that the high-temperature flue gas part produced after heat blower 8 combustion passes in pyrolysis oven 4, another part passes into retort section 42 in pyrolysis oven 4 for pyrolysis provides heat energy.

5) the mud carbon that the retort section 42 in pyrolysis oven 4 produces drives to continue to move downward by agitating vane 6 and enters cooling section 43, discharges after cooling section 43 is cooled to 80 degree from the bottom of pyrolysis oven 4.

6) discharge from the top of pyrolysis oven 4 after entering the flue gas heat radiation of preheating and drying section 41 in pyrolysis oven 4, and arrange outward after smoke duster 9 dedusting.

This technique adopts syllogic pyrolysis oven (i.e. preheating and drying section, retort section and cooling section), the flue gas of the steam that preheating and drying section produces and retort section directly mixes independent discharge process, the carbonization gas that retort section produces extracts tar by arriving pyrolysis gas purification furnace after high temperature gas cleaning device again, dust in such tar just reaches technological standards, meet the requirement that existing petrol and diesel oil is produced, saturation water coal gas part after purification enters the cooling section 43 in pyrolysis oven 4, high temperature mud carbon direct heat exchange is produced with retort section 42, mud carbon dispels the heat into 80 degree discharges pyrolysis oven 4, the destructive distillation of retort section 42 is participated in after the heat absorption of saturation water coal gas.The high-temperature flue gas that saturation water coal gas generates after heat blower 8, part high-temperature flue gas is discharged to smoke duster 9 by the steam mixing directly entering preheating and drying section 41 and preheating and drying section 41 generation after retort section 42 and purifies; This technique carries out dedusting by high temperature gas cleaning device 10 more than the dew point of tar, ensures that the dust content of tar reaches specified requirement.

What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims

1. domestic sludge pyrolysis processing technique, is characterized in that, this technique comprises the steps:

2. domestic sludge pyrolysis processing technique according to claim 1, be is characterized in that: described heat blower is connected with the air outlet tube of blower fan, is blown by blower fan in heat blower.