CN110903001A - Sludge drying device using low-pressure steam as heat source - Google Patents
Sludge drying device using low-pressure steam as heat source Download PDFInfo
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- CN110903001A CN110903001A CN201811071762.5A CN201811071762A CN110903001A CN 110903001 A CN110903001 A CN 110903001A CN 201811071762 A CN201811071762 A CN 201811071762A CN 110903001 A CN110903001 A CN 110903001A
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- sludge
- drying
- steam
- pressure steam
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
Abstract
The invention relates to a sludge drying device using low-pressure steam as a heat source, which comprises a pretreatment unit and a drying unit which are sequentially connected, wherein the pretreatment unit comprises a sludge supplier, a transfer oil storage tank, a recyclable oil storage tank and a preheating mixing tank, the drying unit comprises four dryers and a controller which are sequentially connected, the dryers comprise a vacuum drying pipe, a gas-liquid separator and a condenser which are sequentially connected, the vacuum drying pipe comprises a pipe body, a low-pressure steam chamber is arranged at the bottom in the pipe body, a steam pipe and a stirring shaft with stirring wings are also arranged in the pipe body, and a plurality of heating plates are arranged on the inner peripheral surface of the low-pressure steam chamber at preset intervals, so that the stirring wings can pass between the heating plates, and the steam pipe passes through the centers. The heat source of the device adopts low-pressure steam, and can simultaneously dry the external water, the free water and the internal water of the sludge, thereby realizing the continuous sludge drying process, prolonging the service life of the drying system and improving the sludge drying efficiency.
Description
Technical Field
The invention relates to the technical field of sludge drying, in particular to a sludge drying device using low-pressure steam as a heat source.
Background
The environmental awareness of human beings is gradually strengthened, and the traditional landfill or incineration is still the mainstream effective sludge treatment means before the new mature sludge treatment technology appears. With the increasing production of sludge and the shortage of land for disposal, the proportion of sludge to be filled is gradually reduced, and the land utilization has strict limits on the type and quality of sludge, so that the sludge disposal amount is limited. Because the sludge is rich in organic matters, the sludge generally contains high calorific value, but if the water content of the sludge is too high, the part of the calorific value in the sludge cannot be easily utilized. The water content of sludge after mechanical dehydration in a general sewage treatment plant is still about 80 percent, and the incineration of the sludge with high water content can not realize self-sustaining combustion, and needs to supplement fuel, thereby wasting more resources. If the sludge is dried to a certain degree, the combustion energy can be self-supplied, and the heat generated by the sludge combustion can partially or even completely meet the drying requirement. The sludge drying is completed by two complementary and parallel processes of surface water vaporization and internal water diffusion, and after the sludge is dried, bacteria and pathogens in the sludge can be effectively removed, so that the sludge meets the relevant standards of sludge treatment and utilization, the volume and the weight of the sludge are greatly reduced, and meanwhile, the nutrient content in the sludge can be maintained, and the sludge can be recycled. The main problem of the existing sludge drying apparatus is that the external water and free water of the sludge are only dried, but the internal water of the sludge is not dried because a sticky zone is formed due to a sudden temperature change of the sludge, and thus it is possible to prevent a continuous sludge drying process and reduce the durability life of the drying system, reducing sludge drying efficiency.
Disclosure of Invention
In view of the above, the present invention provides a sludge drying device using low-pressure steam as a heat source to solve the deficiencies in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides an utilize sludge drying device of low pressure steam for heat source, wherein, including the preprocessing unit and the drying unit who connect gradually, preprocessing unit includes the mud supply ware, shifts the oil storage tank, recoverable oil storage tank and preheats the blending tank, preheat the blending tank and connect respectively the mud supply ware shift the oil storage tank with recoverable oil storage tank, the drying unit is including four desicators and a controller that connect gradually, the desicator is including the vacuum drying pipe, vapour and liquid separator and the condenser that connect gradually, the vacuum drying pipe includes the body, be equipped with vacuum exhaust port, mud entry, sludge outlet and comdenstion water export on the body, the bottom is equipped with the low pressure steam chamber in the body, the low pressure steam chamber includes steam supply port and steam recovery port, still be equipped with the (mixing) shaft of steam pipe and swivelling joint motor's area stirring wing in the body, the inner circumferential surface of the low pressure steam chamber is provided with a plurality of heating plates at predetermined intervals so that the agitating wings can pass between the heating plates, and the steam pipe passes through the centers of the heating plates and is connected to the steam supply port.
The sludge drying device using the low-pressure steam as the heat source comprises a first dryer, a second dryer, a third dryer and a fourth dryer, wherein the first dryer is used for drying and preheating pretreated sludge at the temperature of 75-95 ℃, the second dryer is used for drying sludge dried for the first time at the temperature of 80-90 ℃, the third dryer is used for drying sludge dried for the second time at the temperature of 85-95 ℃, the fourth dryer is used for drying sludge dried for the fourth time at the temperature of 90-95 ℃, and the controller comprises a vacuum drying control pipe, a liquid steam separator and a steam condenser which are sequentially connected.
The sludge drying device using the low-pressure steam as the heat source is characterized in that the steam pipe is of a spiral coil pipe structure.
The sludge drying device using the low-pressure steam as the heat source is characterized in that the heating plate is obliquely arranged.
The sludge drying device using the low-pressure steam as the heat source further comprises a post-treatment unit, wherein the post-treatment unit comprises a supply tank, a centrifugal oil extractor, a bucket conveyor and a dried sludge storage tank which are sequentially connected.
Compared with the prior art, the invention has the beneficial effects that:
the heat source adopts low-pressure steam, can dry the outside water, free water and the inside water of mud simultaneously, can realize continuous sludge drying process and improve drying system's durable life-span, has promoted sludge drying efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a sludge drying device using low-pressure steam as a heat source according to the present invention;
fig. 2 shows a schematic view of the structure of the vacuum drying tube of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, the sludge drying apparatus using low-pressure steam as a heat source according to the present invention includes a pretreatment unit 10 and a drying unit 20, which are sequentially connected, the pretreatment unit 10 includes a sludge supplier 11, a transfer oil storage tank 12, a recyclable oil storage tank 13, and a preheating mixing tank 14, the preheating mixing tank 14 is respectively connected to the sludge supplier 11, the transfer oil storage tank 12, and the recyclable oil storage tank 13, and the drying unit 20 includes four dryers 30, which are sequentially connected; 40; 50; 60 and a controller 70, dryer 30; 40; 50; 60 comprises vacuum drying tubes 31 connected in sequence; 41; 51; 61. a gas-liquid separator 32; 42; 52; 62 and a condenser 33; 43; 53; 63. a vacuum drying tube 31; 41; 51; 61 a gas-liquid separator 32 for depressurizing the supplied sludge to a vacuum state; 42; 52; 62 for separating the particles from the vacuum drying tube 31; 41; 51; 61, condenser 33; 43; 53; 63 for condensing the separated moisture and gases. Here, the vacuum drying tube 31; 41; 51; 61 the sludge is evaporated and heated for about 20 to 40 minutes, respectively, and then dried to a moisture content of about 0.1%. In addition, from the vacuum drying tube 31; 41; 51; 61 the moisture and gas discharged are separated by the gas-liquid separator 32; 42; 52; 62 and then separated by condenser 33; 43; 53; 63 are condensed.
Referring to fig. 2, the vacuum drying tube 31; 41; 51; the pipe body 61 includes a pipe body 110, the pipe body 110 is provided with a vacuum exhaust port 111, a sludge inlet 112, a sludge outlet 113, and a condensed water outlet 114, the vacuum exhaust port 111 is used for discharging internal air when generating vapor pressure under a preset atmospheric pressure, the sludge inlet 112 is used for receiving sludge, the sludge outlet 113 is used for discharging dried sludge, and the condensed water outlet 114 is used for discharging condensed water generated by heat of steam. The lower portion of the tube body 110 is provided with a low pressure steam chamber 120, the low pressure steam chamber 120 includes a steam supply port 121 and a steam recovery port 122, the tube body 110 is further provided with a steam pipe 123 and a stirring shaft 141 having stirring wings 142 rotatably connected to a motor, the inner circumferential surface of the low pressure steam chamber 120 is provided with a plurality of heating plates 130 at predetermined intervals so that the stirring wings 142 can pass between the heating plates 130, and the steam pipe 123 passes through the center of the heating plates 130 and is connected to the steam supply port 121 to supply steam to the inside of the heating plates 130. In the present embodiment, a dryer 30; 40; 50; 60 includes a first dryer 30 for drying the pre-heated sludge at a temperature of 75 to 95 ℃, a second dryer 40 for drying the primarily dried sludge at a temperature of 80 to 90 ℃ for a second time, a third dryer 50 for drying the secondarily dried sludge at a temperature of 85 to 95 ℃, a third dryer 60 for drying the third dried sludge at a temperature of 90 to 95 ℃, and a fourth dryer 60 for drying the third dried sludge at a temperature of 90 to 95 ℃, the controller 70 including vacuum drying control pipes 71a connected to each other; 71b, liquid vapor separator 72 a; 72b and a steam condenser 73 a; 73 b. A vacuum drying control pipe 71 a; 71b for receiving the sludge discharged from the fourth vacuum drying pipe 61 and drying the received sludge in a vacuum state while stirring the sludge, respectively, a liquid vapor separator 72 a; 72b for separating the vacuum drying control tube 71 a; 71b, vapor condenser 73 a; 73b are used to condense the separated moisture and gases. A vacuum drying control pipe 71 a; 71b receive some steam and agitate the sludge while heating the sludge at a temperature of about 125 c for 10 minutes, respectively. Further, from the vacuum drying control pipe 71 a; 71b passing the moisture and gases discharged through a liquid vapor separator 72 a; 72b are separated from each other and then cooled by a steam condenser 73 a; 73b are condensed.
The steam pipe 123 has a spiral coil pipe structure, and the heating plate 130 is disposed in an inclined manner, so that the dried sludge can smoothly slide on the heating plate 130 by falling down by gravity because the heating plate 130 is inclined. The apparatus further includes a post-treatment unit 80, and the post-treatment unit 80 includes a supply tank 81, a centrifugal oil extractor 82, a bucket conveyor 84, and a dried sludge storage tank 83 connected in this order.
As can be seen from the above embodiments, the advantages of the present invention are:
the heat source adopts low-pressure steam, can dry the outside water, free water and the inside water of mud simultaneously, can realize continuous sludge drying process and improve drying system's durable life-span, has promoted sludge drying efficiency.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the above-described embodiments, which are only examples. Any equivalent modifications and substitutions for those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (5)
1. The utility model provides an utilize sludge drying device of low pressure steam as heat source, its characterized in that, including the preprocessing unit and the drying unit who connect gradually, preprocessing unit includes the sludge supply ware, shifts the oil storage tank, recoverable oil storage tank and preheats the blending tank, preheat the blending tank and connect respectively the sludge supply ware shift the oil storage tank with recoverable oil storage tank, the drying unit is including four desicators and a controller that connect gradually, the desicator is including the vacuum drying pipe, vapour and liquid separator and the condenser that connect gradually, the vacuum drying pipe includes the body, be equipped with vacuum exhaust port, mud entry, sludge outlet and comdenstion water steam chamber export on the body, the bottom is equipped with the low pressure steam chamber in the body, the low pressure steam chamber includes steam supply port and steam recovery port, still be equipped with the (mixing) shaft of taking the stirring wing of steam pipe and swivelling joint motor in the body, the inner circumferential surface of the low pressure steam chamber is provided with a plurality of heating plates at predetermined intervals so that the agitating wings can pass between the heating plates, and the steam pipe passes through the centers of the heating plates and is connected to the steam supply port.
2. The sludge drying apparatus using low-pressure steam as a heat source of claim 1, wherein the dryer comprises a first dryer for drying the pre-treated sludge at a temperature of 75 ℃ to 95 ℃, a second dryer for drying the first dried sludge at a temperature of 80 ℃ to 90 ℃, a third dryer for drying the second dried sludge at a temperature of 85 ℃ to 95 ℃, and a fourth dryer for drying the third dried sludge at a temperature of 90 ℃ to 95 ℃ for a fourth time, and the controller comprises a vacuum drying control pipe, a liquid steam separator, and a steam condenser which are connected in this order.
3. The sludge drying device using low-pressure steam as a heat source according to claim 1, wherein the steam pipe is a spiral coil pipe structure.
4. The sludge drying apparatus using low-pressure steam as a heat source according to claim 1, wherein the heating plate is disposed obliquely.
5. The sludge drying device using low-pressure steam as a heat source according to claim 1, further comprising a post-treatment unit, wherein the post-treatment unit comprises a supply tank, a centrifugal oil extractor, a bucket conveyor and a dried sludge storage tank which are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071762.5A CN110903001A (en) | 2018-09-14 | 2018-09-14 | Sludge drying device using low-pressure steam as heat source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071762.5A CN110903001A (en) | 2018-09-14 | 2018-09-14 | Sludge drying device using low-pressure steam as heat source |
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| CN110903001A true CN110903001A (en) | 2020-03-24 |
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| CN201811071762.5A Pending CN110903001A (en) | 2018-09-14 | 2018-09-14 | Sludge drying device using low-pressure steam as heat source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114180796A (en) * | 2021-12-03 | 2022-03-15 | 广西电网有限责任公司电力科学研究院 | Method for reducing water content of sludge |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021061A (en) * | 2010-12-13 | 2011-04-20 | 北京昊业怡生科技有限公司 | Method for preparing fuel from organic sludge |
| CN201883012U (en) * | 2010-12-13 | 2011-06-29 | 北京昊业怡生科技有限公司 | Device for dewatering sewage sludge |
| CN102992575A (en) * | 2012-12-14 | 2013-03-27 | 中国石油天然气集团公司 | Steam thermal cycle sludge drying method and system |
| US20150152000A1 (en) * | 2013-11-29 | 2015-06-04 | Byeong Yun PARK | Sludge drying system |
-
2018
- 2018-09-14 CN CN201811071762.5A patent/CN110903001A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021061A (en) * | 2010-12-13 | 2011-04-20 | 北京昊业怡生科技有限公司 | Method for preparing fuel from organic sludge |
| CN201883012U (en) * | 2010-12-13 | 2011-06-29 | 北京昊业怡生科技有限公司 | Device for dewatering sewage sludge |
| CN102992575A (en) * | 2012-12-14 | 2013-03-27 | 中国石油天然气集团公司 | Steam thermal cycle sludge drying method and system |
| US20150152000A1 (en) * | 2013-11-29 | 2015-06-04 | Byeong Yun PARK | Sludge drying system |
Non-Patent Citations (1)
| Title |
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| 王罗春等: "《污泥干化与焚烧技术》", 20 April 2010, 北京冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114180796A (en) * | 2021-12-03 | 2022-03-15 | 广西电网有限责任公司电力科学研究院 | Method for reducing water content of sludge |
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Application publication date: 20200324 |