CN110104926A - A kind of DCL/Direct coal liquefaction sludge treatment equipment and method - Google Patents

A kind of DCL/Direct coal liquefaction sludge treatment equipment and method Download PDF

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Publication number
CN110104926A
CN110104926A CN201910526488.4A CN201910526488A CN110104926A CN 110104926 A CN110104926 A CN 110104926A CN 201910526488 A CN201910526488 A CN 201910526488A CN 110104926 A CN110104926 A CN 110104926A
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CN
China
Prior art keywords
sludge
mud
transmitted
strip
drying
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Pending
Application number
CN201910526488.4A
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Chinese (zh)
Inventor
王伟
奚竹青
范树军
冉海涛
刘洪星
邬耀飞
许昊
王鹏
薛飘
马海龙
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China Shenhua Coal to Liquid Chemical Co Ltd
Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co Ltd
Original Assignee
China Shenhua Coal to Liquid Chemical Co Ltd
Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co Ltd
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Publication date
Application filed by China Shenhua Coal to Liquid Chemical Co Ltd, Ordos Coal to Liquid Branch of China Shenhua Coal to Liquid Chemical Co Ltd filed Critical China Shenhua Coal to Liquid Chemical Co Ltd
Priority to CN201910526488.4A priority Critical patent/CN110104926A/en
Publication of CN110104926A publication Critical patent/CN110104926A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating

Abstract

The present invention relates to direct coal liquefaction technology field, a kind of DCL/Direct coal liquefaction sludge treatment equipment and method are disclosed.The device includes the sludge concentration tank set gradually along pending mud direction of transfer, three mud drain sumps, centrifugal dehydrator, mud drying device, wherein, the sludge drying dress includes the conveying device set gradually along pending mud direction of transfer, full closed pipe type flour stranding machine and drying device, and the conveying device, which will be transmitted to squeeze in full closed pipe type flour stranding machine through the dewatered sludge of the centrifugal dehydrator, forms strip;Drying is provided in the drying device, the drier is dried strip sludge using hot gas.The device and method handle DCL/Direct coal liquefaction sludge through the invention, by gravitational settling concentration and centrifugal dehydration after, then use low temperature sludge drying technology, the Treatment of Sludge that can be about 99% by the moisture content of sludge at 15% or so dewatered sludge, easy to operate, processing cost is lower.

Description

A kind of DCL/Direct coal liquefaction sludge treatment equipment and method
Technical field
The present invention relates to direct coal liquefaction technology fields, and in particular to a kind of DCL/Direct coal liquefaction sludge treatment equipment and side Method.
Background technique
It is straight that national energy investor group Erdos coal oil branch company possesses first set large industrialized coal in the world Connect the production equipment of liquefaction production oil product.Direct coal liquefaction technology was worldwide concerned in recent years.It is direct for coal The disposition of liquefaction sewage farm sludge, original design are handled using traditional centrifugal dewatering technology, main dense using gravitational settling Centrifugal dehydration is carried out by centrifugal dehydrator after contracting, the moisture percentage in sewage sludge generated is higher, generally all 80% to 85% or so, Dewatered sludge quantity is big, and process flow is simple, and treated, and sludge also needs to send to third party to handle, cost compared with It is high.
Summary of the invention
The purpose of the invention is to sludge after overcoming DCL/Direct coal liquefaction sludge treatment technique of the existing technology to handle The problem of moisture content is higher, needs to send to third party and handles, higher cost, provides a kind of DCL/Direct coal liquefaction Treatment of Sludge Device and method, this method by gravitational settling concentration and centrifugal dehydration, continue the very high sludge of moisture content dirty using low temperature Mud drying technique, after processing, the moisture content of sludge are greatly lowered, and this method simple process, energy-saving, safe and environment-friendly.
To achieve the goals above, one aspect of the present invention provides a kind of DCL/Direct coal liquefaction sludge treatment equipment, the device Including sludge concentration tank, three mud drain sumps, centrifugal dehydrator, the sludge drying dress set gradually along pending mud direction of transfer It sets, wherein
The mud drying device includes the conveying device set gradually along pending mud direction of transfer, full closed pipe type Flour stranding machine and drying device, the conveying device will be transmitted to full closed pipe type face through the dewatered sludge of the centrifugal dehydrator It is squeezed in machine and forms strip;Drier is provided in the drying device, the drier is dried strip sludge using hot gas It is dry.
Preferably, the conveying device includes the auger conveyor set gradually along pending mud direction of transfer, wet dirt Pug storehouse, spiral wet mud conveyer and sludge screw pump, wherein dry running protection device is provided on the sludge screw pump, When sludge is in the presence of lacking material, stator overtemperature on dry running protection device, system then shuts down and alarms.
Preferably, the pressure that sludge screw pump provides is 0.1~0.8MPa.
Preferably, the full closed pipe type flour stranding machine includes the sludge distribution set gradually along pending mud direction of transfer Device and tubular type flour stranding machine, wherein be provided with die hole, rotor segment and cleaning device, pending mud in the tubular type flour stranding machine It is squeezed into strips by the die hole.
Preferably, the drying device include the drier set gradually along pending mud direction of transfer, drying chamber, into Expect chamber and cooling spiral conveyer, is provided with upper conveyor belt in the drier, the end of upper conveyor belt is provided with lower transmission Band;The upper conveyor belt and the lower conveyor belt pass through motor driven.
Another aspect of the present invention provides a kind of DCL/Direct coal liquefaction method for sludge treatment, method includes the following steps:
(1) greasy filth dross and excess sludge are collected, after gravitational settling concentration, centrifugal dehydration;
(2) sludge after centrifugal dehydration is squeezed into strips;
(3) strip sludge is heated using hot gas, is discharged after desiccation.
Preferably, in step (1), for sludge after gravitational settling is concentrated, moisture content is down to 95%-97%, volume contracting As low as original 1/8-1/4 times.
Preferably, in step (2), after centrifugal dewatering of sludge, moisture content is down to 82%-87%.
Preferably, in step (3), strip sludge is heated to 75 DEG C -85 DEG C using hot gas;Sludge after desiccation contains Water rate is down to 10%-16%.
Preferably, the method is implemented using previously described device, specific operating process include: by greasy filth dross and Excess sludge is collected into sludge concentration tank, is transmitted to progress gravitational settling concentration in three mud drain sumps by sludge lifting pump, then It is transmitted in centrifugal dehydrator by centrifuge feed pump and carries out centrifugal dehydration;Sludge after centrifugal dehydration is transmitted by auger conveyor To wet mud feed bin, sludge is transmitted in sludge screw pump by spiral wet mud conveyer;Sludge is transmitted to by sludge screw pump In sludge distributor, it is transmitted in tubular type flour stranding machine by several groups of flexible connecting lines, is squeezed by die hole and form strip, rotor segment Die hole will be cleaned by cleaning device while the partition of strip sludge;Strip sludge, which is transported in drier, adds it by hot gas Heat, after sludge is transmitted to upper conveyor belt end by upper conveyor belt, sludge overturning fall on lower conveyor belt, by drying chamber be transmitted into Expect chamber, the sludge after desiccation is discharged by cooling spiral conveyer.
The technical solution handles DCL/Direct coal liquefaction sludge through the invention, and the higher sludge of moisture content is heavy by gravity After drop concentration and centrifugal dehydrator centrifugal dehydration, then low temperature sludge drying technology is used, can be about by the moisture content of sludge 99% Treatment of Sludge at 15% or so dewatered sludge.Scheme process flow of the present invention is simple, and processing cost is lower.
Detailed description of the invention
Fig. 1 is DCL/Direct coal liquefaction sludge treatment equipment schematic diagram;
Fig. 2 is the mud drying device schematic diagram in DCL/Direct coal liquefaction sludge treatment equipment;
Fig. 3 is the conveying device schematic diagram in mud drying device;
Fig. 4 is the schematic diagram of the full closed pipe type flour stranding machine in mud drying device;
Fig. 5 is the schematic diagram of the drying device in mud drying device;
Fig. 6 is the sludge photo that moisture content is 86%;
Fig. 7 is the sludge photo that moisture content is 12.24% after drying and other treatment.
Description of symbols
1 sludge concentration tank, 2 three mud drain sump
3 centrifugal dehydrator, 4 mud drying device
41 conveying device, 42 full closed pipe type flour stranding machine
43 drying device, 411 auger conveyor
412 wet mud feed bin, 413 spiral wet mud conveyer
414 sludge screw pump, 421 sludge distributor
422 tubular type flour stranding machine, 431 drier
432 drying chamber, 433 feed cavity
434 cooling spiral conveyers
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
To achieve the goals above, the present invention provides a kind of DCL/Direct coal liquefaction sludge treatment equipments, as shown in Figs. 1-5, The device include the sludge concentration tank 1 set gradually along pending mud direction of transfer, three mud drain sumps 2, centrifugal dehydrator 3, Mud drying device 4, wherein
The mud drying device 4 includes the conveying device 41 set gradually along pending mud direction of transfer, totally-enclosed Tubular type flour stranding machine 42 and drying device 43, the conveying device 41 will be transmitted to through the dewatered sludge of the centrifugal dehydrator 3 It is squeezed in full closed pipe type flour stranding machine 42 and forms strip;Drier 431, the drier are provided in the drying device 43 431 are dried strip sludge using hot gas.
In device of the present invention, on the basis of having traditional gravity concentration device and centrifugal dehumidifier, Creative increases mud drying device.It can be by wastewater treatment field by low temperature sludge drying technology using mud drying device Each system discharge moisture content be 99% Treatment of Sludge be 15% or so at moisture content dewatered sludge.
In device of the present invention, as shown in figure 3, the conveying device 41 includes along pending mud direction of transfer Auger conveyor 411, wet mud feed bin 412, spiral wet mud conveyer 413 and the sludge screw pump 414 set gradually.
In device of the present invention, the purpose of the conveying device 41 is successfully to be transported to pending mud entirely It closes in tubular type flour stranding machine 42.What the conveyer, conveyer and screw pump were all made of is helix transporting device, uses more spirals The advantages of conveying device, can be prevented from sludge gantry.
Moreover, dry running protection device is provided on the sludge screw pump 414, when sludge is in the presence of lacking material, Stator overtemperature on dry running protection device, system then shut down and alarm;Meanwhile it being equipped in each sludge transporting pipeline online Pressure-detecting device indicates conveyance conduit blocking, then needs to clear up pipeline when pressure is more than setting value;Sludge Feed flow is adjusted by frequency converter.
In device of the present invention, pending mud is transported to the sludge point by the sludge screw pump 414 In orchestration 421.
The pressure that the sludge screw pump 414 provides is 0.1~0.8MPa, specifically, such as can for 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa or 0.8MPa, under preferable case, the sludge screw pump 414 pressure provided are 0.5MPa.
In device of the present invention, as shown in figure 4, the full closed pipe type flour stranding machine 42 includes along pending mud The sludge distributor 421 and tubular type flour stranding machine 422 that direction of transfer is set gradually, wherein be provided in the tubular type flour stranding machine 422 Die hole, rotor segment and cleaning device, pending mud are squeezed into strips by the die hole.
In device of the present invention, sludge is mainly squeezed long noodles by the effect for stating full closed pipe type flour stranding machine 42 Shape, wherein sludge is transported to tubular type flour stranding machine 422 after sludge distributor 421, through several groups of flexible connecting lines by sludge In, sludge is squeezed by noodle shape by the die hole in tubular type flour stranding machine 422;Rotor segment when rotated by strip sludge every It is disconnected, meanwhile, cleaning device cleans die hole.If die hole blocks, loine pressure can be increased, and at this moment system then can Alarm, operator need to carry out inspection and maintenance to device.
In device of the present invention, as shown in figure 5, the drying device 43 includes along pending mud direction of transfer Drier 431, drying chamber 432, feed cavity 433 and the cooling spiral conveyer 434 set gradually.
It is provided with upper conveyor belt in the drier 431, the end of upper conveyor belt is provided with lower conveyor belt;The upload Band and the lower conveyor belt is sent to pass through motor driven.The upper transmission belt and lower conveyor belt are the stainless steel plate with elongated hole, institute It states transmission belt and lower conveyor belt can also be the conveyer belt of other materials.
In device of the present invention, the effect of the drying device 43 is to be heated using hot gas to strip sludge, dirty The moisture of mud itself volatilizees.Entire arid region is divided into 2 independent irradiation modules, the dry gas in each module Body is blown downwards and with sludge direction of transfer on the contrary, temperature gradually rises to 110~140 DEG C in module, and sludge is heated to set Fixed temperature, then sludge directly falls on second conveyer belt, completes evaporation process herein.The dry mud finally obtained passes through Cooling spiral conveyer 434 is discharged into pipeline chain conveyor after carrying out cooling, is transported to dewatered sludge feed bin by pipeline chain conveyor.
The present invention also provides a kind of DCL/Direct coal liquefaction method for sludge treatment, method includes the following steps:
(1) greasy filth dross and excess sludge are collected, after gravitational settling concentration, centrifugal dehydration;
(2) sludge after centrifugal dehydration is squeezed into strips;
(3) strip sludge is heated using hot gas, is discharged after desiccation.
By the sludge of DCL/Direct coal liquefaction sewage farm each unit discharge after the method for the invention is handled, sludge is aqueous Rate can be down to 15% or so from 99.0%-99.5%.Moreover, sludge is handled using method of the present invention, although operation Process is very simple, but treatment effeciency is higher, and cost is relatively low.
In method of the present invention, in step (1), sludge after gravitational settling is concentrated, be down to by moisture content 95%-97%, volume-diminished is to original 1/8-1/4 times.
In a specific embodiment, sludge is after gravitational settling is concentrated, moisture content can be down to 95%, 95.5%, 96%, 96.5% and 97%.In a preferred embodiment, for sludge after gravitational settling is concentrated, moisture content is down to 96%.
In a specific embodiment, sludge is after gravitational settling is concentrated, volume can be contracted to original 1/8,1/7, 1/6,1/5 or 1/4.In a preferred embodiment, sludge is after gravitational settling is concentrated, volume-diminished to original 1/6.
In method of the present invention, in step (2), after centrifugal dewatering of sludge, moisture content is down to 82%-87%.
In a specific embodiment, after centrifugal dewatering of sludge, moisture content can be down to 82%, 83%, 84%, 85%, 86% or 87%.In a preferred embodiment, after centrifugal dewatering of sludge, moisture content is down to 85%.
In method of the present invention, strip sludge is sent to strip sludge and is continuously inputted drier from flour stranding machine It is interior and form balanced accumulation, dry gas blow downwards and with sludge direction of transfer on the contrary, irradiation modules temperature inside gradually on It rises, strip sludge is heated using hot gas, and sludge is heated to the temperature of setting, while heating, sludge is with ibid Conveyer belt moves forward, and falls on lower conveyor belt in the overturning of upper conveyor belt end sludge, evaporation process is completed herein, by dry Then dry chamber enters back into feed cavity, the sludge after desiccation falls on cooling discharge in cooling spiral conveyer.
In method of the present invention, in step (3), strip sludge is heated to 75 DEG C -85 DEG C using hot gas;It is dry The moisture content of sludge after change is down to 10%-16%.
In a specific embodiment, strip sludge can be heated to 75 DEG C, 77 DEG C, 80 DEG C, 82 DEG C or 85 using hot gas ℃.In a preferred embodiment, strip sludge is heated to 80 DEG C using hot gas.
In method of the present invention, method of the present invention is implemented using previously described equipment, specific to grasp Include: that greasy filth dross and excess sludge are collected into sludge concentration tank 1 as process, three mud drain sumps are transmitted to by sludge lifting pump Gravitational settling concentration is carried out in 2, is then transmitted in centrifugal dehydrator 3 by centrifuge feed pump and is carried out centrifugal dehydration;Centrifugation is de- Sludge after water is transmitted to wet mud feed bin 412 by auger conveyor 411, and sludge is transmitted to by spiral wet mud conveyer 413 In sludge screw pump 414;Sludge is transmitted in sludge distributor 421 by sludge screw pump 414, is passed by several groups of flexible connecting lines It is sent in tubular type flour stranding machine 422, is squeezed by die hole and form strip, by cleaning device while rotor segment separates strip sludge Clean die hole;Strip sludge is transported in drier 431 and is heated by hot gas to it, and sludge is transmitted to upper transmission by upper conveyor belt After end of tape, sludge overturning is fallen on lower conveyor belt, feed cavity 433 is transmitted to by drying chamber 432, by cooling spiral conveyer 434 the sludge after desiccation is discharged.
The technical solution DCL/Direct coal liquefaction sludge through the invention is centrifuged through gravitational settling concentration and centrifugal dehydrator After dehydration, then low temperature sludge drying technology is used, the sludge that can be about 99% by the moisture content of each system discharge of wastewater treatment field It is processed into 15% or so dewatered sludge.Scheme process flow of the present invention is simple, and processing cost is lower.
The present invention will be described in detail by way of examples below.
Embodiment 1
Greasy filth dross and excess sludge are collected into sludge A1 concentration basin 1, three mud drain sumps 2 are transmitted to by sludge lifting pump Middle progress gravitational settling concentration, moisture percentage in sewage sludge are down to 95%, volume-diminished to original 1/4, then by centrifuge feed pump It is transmitted in centrifugal dehydrator 3 and carries out centrifugal dehydration, moisture content is down to 82%;Sludge after centrifugal dehydration is by auger conveyor 411 are transmitted to wet mud feed bin 412, and sludge is transmitted in sludge screw pump 414 by spiral wet mud conveyer 413, sludge spiral shell The pressure that bar pump 414 provides is 0.1MPa;Sludge is transmitted in sludge distributor 421 by sludge screw pump 414, by several groups of flexibilities Connecting line is transmitted in tubular type flour stranding machine 422, is squeezed by die hole and is formed strip, while rotor segment separates strip sludge Die hole is cleaned by cleaning device;Strip sludge is transported in drier 431 and is heated by hot gas to it, and strip sludge is heated to 75 DEG C, after sludge is transmitted to upper conveyor belt end by upper conveyor belt, sludge overturning is fallen on lower conveyor belt, is passed by drying chamber 432 It is sent to feed cavity 433, the sludge after desiccation is discharged by cooling spiral conveyer 434.
Embodiment 2
Greasy filth dross and excess sludge are collected into sludge A2 concentration basin 1, three mud drain sumps 2 are transmitted to by sludge lifting pump Middle progress gravitational settling concentration, moisture percentage in sewage sludge are down to 97%, volume-diminished to original 1/8, then by centrifuge feed pump It is transmitted in centrifugal dehydrator 3 and carries out centrifugal dehydration, moisture content is down to 86% (sludge photo is shown in attached drawing 6);After centrifugal dehydration Sludge is transmitted to wet mud feed bin 412 by auger conveyor 411, and sludge is transmitted to sludge spiral shell by spiral wet mud conveyer 413 In bar pump 414, the pressure that sludge screw pump 414 provides is 0.5MPa;Sludge is transmitted to sludge distributor by sludge screw pump 414 It in 421, is transmitted in tubular type flour stranding machine 422 by several groups of flexible connecting lines, is squeezed by die hole and form strip, rotor segment is by item Die hole is cleaned by cleaning device while shape sludge separates;Strip sludge is transported in drier 431 and is heated by hot gas to it, Strip sludge is heated to 85 DEG C, after sludge is transmitted to upper conveyor belt end by upper conveyor belt, sludge overturning falls on lower conveyor belt On, feed cavity 433 is transmitted to by drying chamber 432, (sludge photo is shown in attached by the sludge after desiccation by cooling spiral conveyer 434 Fig. 7) it is discharged.
Embodiment 3
Greasy filth dross and excess sludge are collected into sludge A3 concentration basin 1, three mud drain sumps 2 are transmitted to by sludge lifting pump Middle progress gravitational settling concentration, moisture percentage in sewage sludge are down to 96%, volume-diminished to original 1/6, then by centrifuge feed pump It is transmitted in centrifugal dehydrator 3 and carries out centrifugal dehydration, moisture content is down to 87%;Sludge after centrifugal dehydration is by auger conveyor 411 are transmitted to wet mud feed bin 412, and sludge is transmitted in sludge screw pump 414 by spiral wet mud conveyer 413, sludge spiral shell The pressure that bar pump 414 provides is 0.8MPa;Sludge is transmitted in sludge distributor 421 by sludge screw pump 414, by several groups of flexibilities Connecting line is transmitted in tubular type flour stranding machine 422, is squeezed by die hole and is formed strip, while rotor segment separates strip sludge Die hole is cleaned by cleaning device;Strip sludge is transported in drier 431 and is heated by hot gas to it, and strip sludge is heated to 85 DEG C, after sludge is transmitted to upper conveyor belt end by upper conveyor belt, sludge overturning is fallen on lower conveyor belt, is passed by drying chamber 432 It is sent to feed cavity 433, the sludge after desiccation is discharged by cooling spiral conveyer 434.
Embodiment 4
DCL/Direct coal liquefaction sludge A4 is handled according to the method for embodiment 3, unlike, strip sludge is transported to drier It is heated by hot gas in 431, strip sludge is heated to 78 DEG C, the sludge after obtaining desiccation.
Comparative example 1
DCL/Direct coal liquefaction sludge D1 is handled according to the method for embodiment 3, unlike, strip sludge is transported to drier It is heated by hot gas in 431, strip sludge is heated to 60 DEG C, the sludge after obtaining desiccation.
Comparative example 2
DCL/Direct coal liquefaction sludge D2 is handled according to the method for embodiment 3, unlike, the pressure of the offer of sludge screw pump 414 Power is 0.05MPa, the sludge after obtaining desiccation.
Test case
Sludge A1-A4 and D1-D2 is tested before and after by method desiccation of the present invention, the variation of moisture content, test The results are shown in Table 1.
Table 1
After can be seen that using technical solutions according to the invention by the result of table 1 to DCL/Direct coal liquefaction sludge drying, The moisture content of sludge is greatly lowered, and treatment effect is preferable.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to Protection scope of the present invention.

Claims (10)

1. a kind of DCL/Direct coal liquefaction sludge treatment equipment, which includes the sludge set gradually along pending mud direction of transfer Concentration basin (1), three mud drain sumps (2), centrifugal dehydrator (3), mud drying device (4), wherein
The mud drying device (4) includes the conveying device (41) set gradually along pending mud direction of transfer, totally-enclosed Tubular type flour stranding machine (42) and drying device (43), the conveying device (41) will be through the centrifugal dehydrator (3) dewatered dirts Mud, which is transmitted to squeeze in full closed pipe type flour stranding machine (42), forms strip;Drier is provided in the drying device (43) (431), the drier (431) is dried strip sludge using hot gas.
2. the apparatus according to claim 1, which is characterized in that the conveying device (41) includes transmitting along pending mud Auger conveyor (411), wet mud feed bin (412), spiral wet mud conveyer (413) and the sludge screw rod that direction is set gradually It pumps (414), wherein it is provided with dry running protection device on the sludge screw pump (414), when sludge is in the presence of lacking material, Stator overtemperature on dry running protection device, system then shut down and alarm.
3. the apparatus of claim 2, which is characterized in that sludge screw pump (414) provide pressure be 0.1~ 0.8MPa。
4. the apparatus according to claim 1, which is characterized in that the full closed pipe type flour stranding machine (42) includes along to be processed The sludge distributor (421) and tubular type flour stranding machine (422) that sludge direction of transfer is set gradually, wherein the tubular type flour stranding machine (422) die hole, rotor segment and cleaning device are provided in, pending mud is squeezed into strips by the die hole.
5. the apparatus according to claim 1, which is characterized in that the drying device (43) includes transmitting along pending mud Drier (431), drying chamber (432), feed cavity (433) and the cooling spiral conveyer (434) that direction is set gradually, it is described dry It is provided with upper conveyor belt in dry device (431), the end of upper conveyor belt is provided with lower conveyor belt;The upper conveyor belt and it is described under Conveyer belt passes through motor driven.
6. a kind of DCL/Direct coal liquefaction method for sludge treatment, method includes the following steps:
(1) greasy filth dross and excess sludge are collected, after gravitational settling concentration, centrifugal dehydration;
(2) sludge after centrifugal dehydration is squeezed into strips;
(3) strip sludge is heated using hot gas, is discharged after desiccation.
7. according to the method described in claim 6, it is characterized in that, in step (1), sludge after gravitational settling is concentrated, Moisture content is down to 95%-97%, and volume-diminished is to original 1/8-1/4 times.
8. according to the method described in claim 6, it is characterized in that, after centrifugal dewatering of sludge, moisture content drops in step (2) To 82%-87%.
9. according to the method described in claim 6, it is characterized in that, strip sludge is heated to using hot gas in step (3) 75℃-85℃;The moisture content of sludge after desiccation is down to 10%-16%.
10. according to the method described in claim 6, it is characterized in that, the method uses any one of claim 1-5 institute The device stated is implemented, and specific operating process includes: that greasy filth dross and excess sludge are collected into sludge concentration tank (1), by dirt Mud elevator pump, which is transmitted in three mud drain sumps (2), carries out gravitational settling concentration, and it is de- to be then transmitted to centrifugation by centrifuge feed pump Centrifugal dehydration is carried out in water dispenser (3);Sludge after centrifugal dehydration is transmitted to wet mud feed bin (412) by auger conveyor (411), Sludge is transmitted in sludge screw pump (414) by spiral wet mud conveyer (413);Sludge screw pump (414) transmits sludge To in sludge distributor (421), it is transmitted in tubular type flour stranding machine (422) by several groups of flexible connecting lines, is squeezed and formed by die hole Strip cleans die hole by cleaning device while rotor segment separates strip sludge;Strip sludge is transported to drier (431) it is heated by hot gas in, after sludge is transmitted to upper conveyor belt end by upper conveyor belt, sludge overturning falls on lower conveyor belt On, feed cavity (433) are transmitted to by drying chamber (432), the sludge after desiccation is discharged by cooling spiral conveyer (434).
CN201910526488.4A 2019-06-18 2019-06-18 A kind of DCL/Direct coal liquefaction sludge treatment equipment and method Pending CN110104926A (en)

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CN103553291A (en) * 2013-11-11 2014-02-05 北京纬纶华业环保科技股份有限公司 Low-temperature sludge drying treatment system and technology
CN104291548A (en) * 2014-10-30 2015-01-21 神华集团有限责任公司 Treating method for biochemical sludge and treating device for biochemical sludge

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Publication number Priority date Publication date Assignee Title
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CN101148310A (en) * 2007-09-13 2008-03-26 北京中油爱索环境工程技术有限公司 Process for treating oil-containing sludge
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Application publication date: 20190809