CN104926057A - Device for preparing sludge carbon through sludge of sewage treatment plant and method thereof - Google Patents
Device for preparing sludge carbon through sludge of sewage treatment plant and method thereof Download PDFInfo
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- CN104926057A CN104926057A CN201510414772.4A CN201510414772A CN104926057A CN 104926057 A CN104926057 A CN 104926057A CN 201510414772 A CN201510414772 A CN 201510414772A CN 104926057 A CN104926057 A CN 104926057A
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Abstract
The invention relates to a device for preparing sludge carbon through sludge of a sewage treatment plant and a method thereof. The device is characterized in that an adjusting preheating storage tank is connected with a sludge pump and a hydrothermal reaction kettle; the hydrothermal reaction kettle is connected with the adjusting preheating storage tank and a steam boiler; the hydrothermal reaction kettle is connected with a buffer tank, the buffer tank is connected with a separation dehydrator, the separation dehydrator is connected with a pelleting forming machine, and the pelleting forming machine is connected with a carbonization furnace. The method includes the following sludge carbon preparation steps that firstly, preheating is conducted; secondly, bound water and solid particles are separated for the first time in the hydrothermal reaction kettle; thirdly, a liquid sludge and water mixture obtained from the second step is placed in the buffer tank, and then the liquid sludge and water mixture is obtained again; fourthly, the obtained liquid sludge and water mixture is conveyed into the separation dehydrator for dehydration separation; fifthly, pelleting is conducted in the pelleting forming machine; sixthly, carbonization is conducted in the carbonization furnace for 8-10 hours, and the sludge carbon is generated. By the adoption of the technical scheme, sludge utilization is improved, secondary pollution is not caused through the combination with the sewage treatment plant in the process, and the purpose of biomass sludge reutilization is achieved.
Description
Technical field
The invention belongs to technical field of sludge treatment, particularly relate to equipment and method thereof that a kind of sludge of sewage treatment plant prepares sludge carbon.
Background technology
Containing combustiblesubstance in municipal sludge, especially biochemical sludge (excess sludge that second pond is discharged), owing to wherein containing a large amount of active sludge bacteriums, combustible mass is larger.Mud thermal value according to the ground such as Shanghai, Tianjin is tested, and the thermal value in Chinese municipal sludge is about 2200-3300 kilocalorie/㎏ dry-matter.Wherein postdigestive mud thermal value is lower, is generally only about 70% of undigested sludge.Summer, the thermal value of mud was lower than winter.So-called sludge carbonization, exactly by heating to mud, pressurizeing, makes the lysis in biochemical sludge, is discharged by moisture wherein, remains again the process of carbonaceous in mud to greatest extent simultaneously.The advantage of mud carbonization is, mud carbonization is deviate from by the moisture in mud by fragmentation pattern, energy consumption is few, carbon content in resultant product is high, and thermal value is large, and other technique great majority are by heating, the mode of evaporation removes the moisture in mud, power consumption is large, and the carbonaceous in ash content is low, and utility value is little
The development of mud carbonization technology have passed through three phases in the world, theoretical research stage, small-scale production experimental stage and large-scale business promotion stage.
(1) theoretical research stage (1980-1990).The research in this stage concentrates in the mechanism of mud carbonization.This stage, an outstanding feature was exactly a large amount of patent application.The STORS patent of the people such as Fassbender, A.G, Dickinson N.L mud carbonization patent is applied for all in the meantime and ratifies.
(2) small-scale production experimental stage (1990-2000).Along with going deep into of mud carbonization theoretical investigation, and the success of laboratory lab scale, people start to carry out small-scale industrial experimentation (Pilot Trial) to this technology.During this, the many specific equipments of Design and manufacture, solve the technical problem of a large amount of actual batch production.The feature in this stage is as follows:
1. small scale.Such as Mitsubishi in 1997 is 20 tons of dry mud/skies at the mud carbonization factory rules and regulations mould in space portion; The mud carbonization demonstration plant scale that Thermo Energy in 1997 sets up in Colton city, California is 5 tons of dry mud/skies.
2. fund of testing is mainly from major company and government, instead of commercial user.Such as, in the test of Japan all from major company, the test fund in California is from U.S. EPA.
Test all achieves certain achievement, can output part carbide.But test also exposes some problems that this technology exists.First batch of pilot plant does not facilitate direct commercial order.
(3) the large-scale business promotion stage (2000-).Mud carbonization technology is able to large-scale business promotion, except the maturation gradually of mud carbonization technology itself, also has other various factorss.Be described with the development of mud carbonization technology in Japan and the U.S. below:
In Japan, originally the final disposal method 80% of mud is burned.But people recognize gradually, due to the complexity of sludge components, sludge incineration not only can produce the carcinogenss such as Dioxins, and also has some other lost toxic and harmful to produce.This also impels Japan environmental protection department to propose stricter requirement to burning expellant gas, and the cost of the just very high burning process of original cost is improved more.In order to replace burning process, at present, Japan's You Duo company production and selling carbonizing plant.The carbide furnace of more famous You Renyuan company, the mud carbonizing plant etc. of bar industrial.In Tokyo water drain technology exhibition in 2005, special Co., Ltd. of day ring of Japan is even proposed the mud carbonization decrement car of standard.This car can arrive at any time anyly has the place of mud to carry out carbonization to mud.These development show, mud carbonization technology has been tending towards ripe.
In the U.S., the mud in a lot of state all adopts landfill in the past.But people recognize gradually, due to the imperfection of landfill yard facility, the objectionable impurities in mud can pollute underground water, and sludge landfill also can work the mischief to the environment of surrounding.So U.S. EPA has promulgated new Sludge landfill standard, the mud only reaching Class A standard has just allowed landfill.The promulgation of this standard, existing sewage work is only had and drops into huge sludge treatment cost, the mud making it discharge reaches Class A, just can carry out final landfill stabilization.In addition, existing landfill yard is close to saturated, and it is more and more difficult to open up new landfill factory.So, in order to reach the new sludge disposal standard of EPA and solve the problem used up gradually of landfill yard, after 2000, in the government in the individual states of the U.S., county, all establish special sludge disposal research institution, feasibility study is carried out to possible solution.While some traditional sludge disposal schemes of research (as burned, compost, mummification), new mud carbonization technology starts the limit of consideration entering government.The such as large Los Angeles in Southern California, through the examination of nearly 2 years, has determined to set up the carbonization factory that processes 675 tons of mud every day, is built and run by energy technology company (Enertech Environmental Co.).
Summary of the invention
The present invention provides a kind of utilization that improve mud for solving in known technology the technical problem that exists, and combine with sewage work during the course and do not cause secondary pollution, reach the order of biomass sludge recycling, and obtain equipment and the method thereof of preparing sludge carbon with sludge of sewage treatment plant of the higher sludge carbon of utility value
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
Sludge of sewage treatment plant prepares equipment and the method thereof of sludge carbon, it is characterized in that: comprise and regulate pre-hot tank, hydrothermal reaction kettle, surge tank, separating and dehydrating machine, roto-granulato, charring furnace; The charging port of the pre-hot tank of above-mentioned adjustment connects sludge pump, and the discharging port of the pre-hot tank of described adjustment connects hydrothermal reaction kettle, and the pre-hot tank of described adjustment is also provided with organic gas vapor pipe and drip pipe; The exhaust side of described hydrothermal reaction kettle connects the pre-hot tank of adjustment, and the inlet end of described hydrothermal reaction kettle connects steam boiler; Described hydrothermal reaction kettle connects surge tank by sludge delivery pump, and described surge tank connects separating and dehydrating machine by sludge delivery pump, and described separating and dehydrating machine connects roto-granulato by e Foerderanlage, and described roto-granulato connects charring furnace by e Foerderanlage; Described separating and dehydrating machine connects anaerobic fermentation tank, and the escape pipe of described anaerobic fermentation tank connects steam boiler, and the lower end of anaerobic fermentation tank is provided with residual liquid discharge pipe.
Sludge of sewage treatment plant prepares a method for sludge carbon, and its step is as follows,
1), preheating, utilize sludge delivery pump high-moisture-contensludge sludge to be squeezed into and regulate pre-hot tank, the weary steam of being discharged by hydrothermal reaction kettle carries out preheating to the mud regulated in preheating storage tank, hydrothermal reaction kettle connects steam boiler, steam boiler carries saturation steam in water reactor, regulates the organic gas of preheating tank discharge to be delivered to steam boiler and carries out secondary combustion heating as fuel;
2), water is separated admittedly first: the mud of step 1 preheating is squeezed into hydrothermal reaction kettle by sludge delivery pump, by the saturation steam of 160 DEG C to 300 DEG C in hydrothermal reaction kettle, stir process 30min-90min under the pressure of 1.5 to 9.5Mpa, irreducible water is separated first with solid particulate, obtains liquid mud mixture;
3), water is separated admittedly again: liquid mud mixture sludge delivery pump step 2 obtained sends into surge tank, and in surge tank, temperature is down to less than 80 DEG C, and Pressure Drop is to normal pressure, and this step is entered again to obtain liquid mud mixture;
4), dewater, the liquid mud mixture obtained in step 3 be transported to dehydration in separating and dehydrating machine and be separated, the speed 1800-2500r/min of described separating and dehydrating machine, the treatment time is 15min ~ 16min, obtains dewatered sludge, and its water ratio is down to about 40%; The sewage transport that separating and dehydrating machine is deviate from, to anaerobic fermentation tank, is fermented in anaerobic fermentation tank, fermentation obtain biogas by Cemented filling to steam boiler as fuel secondary combustion;
5), the dewatered sludge obtained in step 4 is delivered to granulation in roto-granulato;
6), carbonize, the mud granule produced is put into charring furnace and carbonizes, carbonize 8 ~ 10 hours in step 5; The inflammable gas produced in carbonization process is delivered in charring furnace as fuel secondary combustion; .
The advantage that the present invention has and positively effect are: because the present invention adopts technique scheme, improve the utilization of mud, and combine with sewage work during the course and do not cause secondary pollution, reach the order of biomass sludge recycling, and obtain the higher sludge carbon of utility value.
Summary of the invention
Fig. 1 is topology layout figure of the present invention.
In figure: 1, regulate pre-hot tank; 1-1, organic gas vapor pipe; 1-2, drip pipe; 2, hydrothermal reaction kettle; 2-1, exhaust side; 3, surge tank; 4, separating and dehydrating machine; 5, roto-granulato; 6, charring furnace; 7, steam boiler; 8, anaerobic fermentation tank; 8-1, escape pipe; 8-2, residual liquid discharge pipe.
Embodiment
For summary of the invention, the Characteristic of the application can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1, a kind of sludge of sewage treatment plant prepares equipment and the method thereof of sludge carbon, comprises and regulates pre-hot tank 1, hydrothermal reaction kettle 2, surge tank 3, separating and dehydrating machine 4, roto-granulato 5, charring furnace 6; The charging port of the pre-hot tank 1 of above-mentioned adjustment connects sludge pump, and the discharging port of the pre-hot tank 1 of described adjustment connects hydrothermal reaction kettle 2, and the pre-hot tank 1 of described adjustment is also provided with organic gas vapor pipe 1-1 and drip pipe 1-2; The exhaust side 2-1 of described hydrothermal reaction kettle 2 connects the pre-hot tank 1 of adjustment, and the inlet end of described hydrothermal reaction kettle 2 connects steam boiler 7; Described hydrothermal reaction kettle 2 connects surge tank 3 by sludge delivery pump, described surge tank 3 connects separating and dehydrating machine 4 by sludge delivery pump, described separating and dehydrating machine connects roto-granulato 5 by e Foerderanlage, and described roto-granulato 5 connects charring furnace 6 by e Foerderanlage; Described separating and dehydrating machine 4 connects anaerobic fermentation tank 8, and the escape pipe 8-1 of described anaerobic fermentation tank 8 connects steam boiler 7, and the lower end of anaerobic fermentation tank 8 is provided with residual liquid discharge pipe 8-2.
Sludge of sewage treatment plant prepares a method for sludge carbon, and its step is as follows,
1), preheating, utilize sludge delivery pump high-moisture-contensludge sludge to be squeezed into and regulate pre-hot tank, the weary steam of being discharged by hydrothermal reaction kettle carries out preheating to the mud regulated in preheating storage tank, hydrothermal reaction kettle connects steam boiler, steam boiler carries saturation steam in water reactor, regulates the organic gas of preheating tank discharge to be delivered to steam boiler and carries out secondary combustion heating as fuel;
2), water is separated admittedly first: the mud of step 1 preheating is squeezed into hydrothermal reaction kettle by sludge delivery pump, by the saturation steam of 160 DEG C to 300 DEG C in hydrothermal reaction kettle, stir process 30min-90min under the pressure of 1.5 to 9.5Mpa, irreducible water is separated first with solid particulate, obtains liquid mud mixture;
3), water is separated admittedly again: liquid mud mixture sludge delivery pump step 2 obtained sends into surge tank, and in surge tank, temperature is down to less than 80 DEG C, and Pressure Drop is to normal pressure, and this step is entered again to obtain liquid mud mixture;
4), dewater, the liquid mud mixture obtained in step 3 be transported to dehydration in separating and dehydrating machine and be separated, the speed 1800-2500r/min of described separating and dehydrating machine, the treatment time is 15min ~ 16min, obtains dewatered sludge, and its water ratio is down to about 40%; The sewage transport that separating and dehydrating machine is deviate from, to anaerobic fermentation tank, is fermented in anaerobic fermentation tank, fermentation obtain biogas by Cemented filling to steam boiler as fuel secondary combustion;
5), the dewatered sludge obtained in step 4 is delivered to granulation in roto-granulato;
6), carbonize, the mud granule produced is put into charring furnace and carbonizes, carbonize 8 ~ 10 hours in step 5; The inflammable gas produced in carbonization process is delivered in charring furnace as fuel secondary combustion; .
The above is only to preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, every according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (2)
1. prepare an equipment for sludge carbon with sludge of sewage treatment plant, it is characterized in that: comprise and regulate pre-hot tank, hydrothermal reaction kettle, surge tank, separating and dehydrating machine, roto-granulato, charring furnace; The charging port of the pre-hot tank of above-mentioned adjustment connects sludge pump, and the discharging port of the pre-hot tank of described adjustment connects hydrothermal reaction kettle, and the pre-hot tank of described adjustment is also provided with organic gas vapor pipe and drip pipe; The exhaust side of described hydrothermal reaction kettle connects the pre-hot tank of adjustment, and the inlet end of described hydrothermal reaction kettle connects steam boiler; Described hydrothermal reaction kettle connects surge tank by sludge delivery pump, and described surge tank connects separating and dehydrating machine by sludge delivery pump, and described separating and dehydrating machine connects roto-granulato by e Foerderanlage, and described roto-granulato connects charring furnace by e Foerderanlage; Described separating and dehydrating machine connects anaerobic fermentation tank, and the escape pipe of described anaerobic fermentation tank connects steam boiler, and the lower end of anaerobic fermentation tank is provided with residual liquid discharge pipe.
2. a method for sludge carbon prepared by the equipment utilizing sludge of sewage treatment plant as claimed in claim 1 to prepare sludge carbon, and its step is as follows,
1), preheating, utilize sludge delivery pump high-moisture-contensludge sludge to be squeezed into and regulate pre-hot tank, the weary steam of being discharged by hydrothermal reaction kettle carries out preheating to the mud regulated in preheating storage tank, hydrothermal reaction kettle connects steam boiler, steam boiler carries saturation steam in water reactor, regulates the organic gas of preheating tank discharge to be delivered to steam boiler and carries out secondary combustion heating as fuel;
2), water is separated admittedly first: the mud of step 1 preheating is squeezed into hydrothermal reaction kettle by sludge delivery pump, by the saturation steam of 160 DEG C to 300 DEG C in hydrothermal reaction kettle, stir process 30min-90min under the pressure of 1.5 to 9.5Mpa, irreducible water is separated first with solid particulate, obtains liquid mud mixture;
3), water is separated admittedly again: liquid mud mixture sludge delivery pump step 2 obtained sends into surge tank, and in surge tank, temperature is down to less than 80 DEG C, and Pressure Drop is to normal pressure, and this step is entered again to obtain liquid mud mixture;
4), dewater, the liquid mud mixture obtained in step 3 be transported to dehydration in separating and dehydrating machine and be separated, the speed 1800-2500r/min of described separating and dehydrating machine, the treatment time is 15min ~ 16min, obtains dewatered sludge, and its water ratio is down to about 40%; The sewage transport that separating and dehydrating machine is deviate from, to anaerobic fermentation tank, is fermented in anaerobic fermentation tank, fermentation obtain biogas by Cemented filling to steam boiler as fuel secondary combustion;
5), the dewatered sludge obtained in step 4 is delivered to granulation in roto-granulato;
6), carbonize, the mud granule produced is put into charring furnace and carbonizes, carbonize 8 ~ 10 hours in step 5; The inflammable gas produced in carbonization process is delivered in charring furnace as fuel secondary combustion.
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| CN201510414772.4A CN104926057A (en) | 2015-07-15 | 2015-07-15 | Device for preparing sludge carbon through sludge of sewage treatment plant and method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883922A (en) * | 2016-05-20 | 2016-08-24 | 江钨高技术开发应用有限公司 | System for preparing pyrochlore tungsten oxide through hydrothermal conversion of ammonium paratungstate |
| CN106904814A (en) * | 2017-04-24 | 2017-06-30 | 上海梵煦环境科技有限公司 | A kind of method of sludge carbonization resintering |
| CN107365593A (en) * | 2017-09-07 | 2017-11-21 | 中国科学院城市环境研究所 | A kind of method that antibiotic bacterium dregs prepare charcoal |
-
2015
- 2015-07-15 CN CN201510414772.4A patent/CN104926057A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883922A (en) * | 2016-05-20 | 2016-08-24 | 江钨高技术开发应用有限公司 | System for preparing pyrochlore tungsten oxide through hydrothermal conversion of ammonium paratungstate |
| CN106904814A (en) * | 2017-04-24 | 2017-06-30 | 上海梵煦环境科技有限公司 | A kind of method of sludge carbonization resintering |
| CN107365593A (en) * | 2017-09-07 | 2017-11-21 | 中国科学院城市环境研究所 | A kind of method that antibiotic bacterium dregs prepare charcoal |
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