CN113087359A - Sludge drying system, sludge drying method and application thereof - Google Patents
Sludge drying system, sludge drying method and application thereof Download PDFInfo
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- CN113087359A CN113087359A CN202110198816.XA CN202110198816A CN113087359A CN 113087359 A CN113087359 A CN 113087359A CN 202110198816 A CN202110198816 A CN 202110198816A CN 113087359 A CN113087359 A CN 113087359A
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- 239000010802 sludge Substances 0.000 title claims abstract description 297
- 238000001035 drying Methods 0.000 title claims abstract description 225
- 238000001704 evaporation Methods 0.000 claims abstract description 21
- 230000008020 evaporation Effects 0.000 claims abstract description 21
- 239000000428 dust Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000004590 computer program Methods 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 5
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- 238000004519 manufacturing process Methods 0.000 description 5
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- 238000005188 flotation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
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- 238000005504 petroleum refining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge drying system, a sludge drying method and application thereof, wherein the system can comprise: the system comprises a first sludge drying device and a second sludge drying device; the first sludge drying equipment is provided with a first steam inlet, the second sludge drying equipment is provided with a second evaporation gas outlet, and the second evaporation gas outlet is connected with the first steam inlet through a pipeline. According to the embodiment of the invention, the hot steam evaporated from the sludge in the second sludge drying device is fully utilized as the heat energy of the first sludge drying device to carry out drying treatment on the new sludge entering the first sludge drying device. In addition, because the new sludge in the first sludge drying device has low-temperature characteristics, the hot steam evaporated from the sludge in the second sludge drying device can be condensed. For the whole sludge drying system, the consumption of hot steam is reduced, the consumption of circulating condensed water is also reduced, the sludge drying cost is reduced, and the purposes of energy conservation and environmental protection are achieved.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge drying system, a sludge drying method and application thereof.
Background
The oily sludge is produced in the process of oil exploitation or refining, and is mainly formed by mixing water, petroleum hydrocarbons, solid silt, numerous impurities and the like. For a refining enterprise, the treatment of the oily sludge is a key section for treating the sewage of the enterprise, and the treatment of the oily sludge plays an important role in treating the sewage generated by other sections in the refining enterprise. For example, in the sewage treatment process, the oil separation tank, the air flotation tank and the living tank respectively generate oil-containing sludge with different properties, the sludge in the oil separation tank contains much oil and water, the sludge in the air flotation tank contains much water, oil and scum, the sludge in the living tank contains much water and microorganisms, and the water content of the different sludge is generally high and is generally higher than 80%.
According to the relevant national regulations, the high oil-containing sludge belongs to dangerous waste, special hazardous waste treatment plants are required to carry out harmless treatment, stabilization treatment and other professional treatment, and due to the fact that the water content is high, the transportation and treatment cost of the oil-containing sludge is correspondingly increased, and the operation cost of enterprises for treating the oil-containing sludge is correspondingly increased. If the water content of the existing oily sludge is dried from 90% to 50%, the volume of the sludge can be reduced by more than 60%, the weight of the sludge can be reduced by more than 80%, and the operation cost can be saved by more than 50% under the condition that the transportation and hazardous waste treatment cost is not changed.
At present, a sludge drier is mainly used for sludge drying treatment, and the existing sludge drier is mainly divided into a disc drier, a thin layer drier, a double helix drier and a track drier. The heat exchange area of the four sludge drying machines is large, a single drying chamber is adopted, the disc, the thin layer and the double helix are driven out by adopting a central heating mode and a shell jacket heating mode, and the crawler type nitrogen gas heated by steam is in direct contact with granular oil sludge to take away water. According to the heat balance, the four drying machines at present need about 1.1 tons of low-pressure steam for drying 1 ton of wet oil sludge with 90 percent of wet oil sludge to 40 percent of dry oil sludge, and the steam evaporated from condensed wet oil sludge needs about 37 tons of circulating cooling water. The existing sludge drying system has high energy consumption, and the phenomenon of production reduction caused by insufficient capacity of a condenser often occurs in the production process. Therefore, how to construct an energy-saving and efficient sludge drying system is a difficult problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention has been made to provide a sludge drying system, a sludge drying method and applications thereof that overcome or at least partially solve the above problems.
In a first aspect, an embodiment of the present invention provides a sludge drying system, which may include: the system comprises a first sludge drying device and a second sludge drying device; the first sludge drying equipment is provided with a first steam inlet, the second sludge drying equipment is provided with a second evaporation gas outlet, and the second evaporation gas outlet is connected with the first steam inlet through a pipeline.
Optionally, the first sludge drying apparatus includes: the first screw disc shell is arranged in the first shell; the first spiral shell divides a cavity surrounded by the first shell into a first cavity and a first jacket cavity; a plurality of first spiral discs are arranged in the first chamber and used for conveying dried sludge; the first steam inlet is in communication with the first jacket chamber.
Optionally, the second sludge drying apparatus includes: the second shell and the second spiral shell arranged in the second shell; the second spiral shell divides a cavity surrounded by the second shell into a second cavity and a second jacket cavity; a second spiral disc with a double-spiral-disc meshing structure is arranged in the second chamber and used for conveying and crushing the dried sludge; a second steam inlet and a second liquid outlet are formed in the center of the spiral disc; the second boil-off gas outlet is located on the second housing and is in communication with the second chamber.
Optionally, a third steam inlet and a third liquid outlet are further arranged on the second casing; the third steam inlet is positioned at the upper part of the second shell, and the third liquid outlet is positioned at the bottom of the second shell; the third steam inlet and the third liquid outlet are respectively communicated with the second jacket cavity.
Optionally, the system further comprises: and the dust removal equipment is provided with a fourth steam inlet and a fourth steam outlet, the fourth steam inlet is connected with the second evaporation gas outlet through a pipeline, and the fourth steam outlet is connected with the first steam inlet through a pipeline.
Optionally, the dust removing device is further provided with a fifth steam inlet, and the fifth steam inlet is externally connected with a steam pipeline.
In a second aspect, an embodiment of the present invention provides a sludge drying method, which may include: drying the dried sludge in a first sludge drying device; further comprising: drying the dried sludge dried by the first sludge drying equipment in a second sludge drying equipment; and discharging the steam evaporated from the dried sludge in the drying treatment in the second sludge drying equipment through a second evaporation gas outlet arranged on the second sludge drying equipment, and discharging the steam into the first sludge drying equipment through a first steam inlet arranged on the first sludge drying equipment.
Optionally, the first sludge drying equipment adopts a plurality of first spiral plates of a multi-spiral-plate structure to be right the dried sludge is transmitted, and the second sludge drying equipment adopts a second spiral plate of a double-spiral-plate meshing structure to be right the dried sludge is transmitted and crushed.
Optionally, the dried sludge is transported from the first sludge drying apparatus to the second sludge drying apparatus by a third spiral disc with hot nitrogen protection.
Optionally, the first sludge drying device performs drying treatment on the dried sludge in a shell-side heating manner; and the second sludge drying equipment adopts a central heating mode to carry out drying treatment on the dried sludge.
Optionally, the second sludge drying apparatus further performs drying treatment on the dried sludge by using a jacket heating manner.
Optionally, before the steam is discharged into the first sludge drying apparatus, the steam is subjected to dust removal treatment.
Optionally, before the steam is discharged into the first sludge drying apparatus, high-grade steam is added to the steam or the steam is heated to improve the grade of the steam discharged into the first sludge drying apparatus.
Optionally, the first sludge drying device is used for drying the dried sludge under the condition of normal pressure or negative pressure; and the second sludge drying equipment is used for drying the dried sludge under the positive pressure condition.
In a third aspect, an embodiment of the present invention provides an application of the sludge drying system of the first aspect in a refining system.
In a fourth aspect, embodiments of the present invention provide a refinery system, which may include the sludge drying system of the first aspect.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the embodiment of the invention provides a sludge drying system, a sludge drying method and application thereof, wherein the system can comprise: the system comprises a first sludge drying device and a second sludge drying device; the first sludge drying equipment is provided with a first steam inlet, the second sludge drying equipment is provided with a second evaporation gas outlet, and the second evaporation gas outlet is connected with the first steam inlet through a pipeline. According to the embodiment of the invention, the hot steam evaporated from the sludge in the second sludge drying device is fully utilized as the heat energy of the first sludge drying device to carry out drying treatment on the new sludge entering the first sludge drying device. In addition, because the new sludge in the first sludge drying device has low-temperature characteristics, the hot steam evaporated from the sludge in the second sludge drying device can be condensed. For the whole sludge drying system, the consumption of hot steam is reduced, the consumption of circulating condensed water is also reduced, the sludge drying cost is reduced, and the purposes of energy conservation and environmental protection are achieved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a sludge drying system provided in embodiment 1 of the present invention;
fig. 2A is one of the structural diagrams of the first sludge drying apparatus provided in embodiment 1 of the present invention;
fig. 2B is a second structural diagram of the first sludge drying apparatus provided in embodiment 1 of the present invention;
fig. 3A is one of the structural diagrams of the second sludge drying apparatus provided in embodiment 1 of the present invention;
fig. 3B is a second structural diagram of a second sludge drying apparatus provided in embodiment 1 of the present invention;
fig. 3C is a third structural view of a second sludge drying apparatus provided in embodiment 1 of the present invention;
fig. 4A is one of the structural views of the dust removing apparatus provided in embodiment 1 of the present invention;
fig. 4B is a second structural diagram of a dust removing apparatus provided in embodiment 1 of the present invention;
FIG. 5 is a flow chart of a sludge drying method provided in example 2 of the present invention;
fig. 6 is a schematic process flow diagram of a sludge drying method provided in embodiment 2 of the present invention.
Wherein, 1 is a first sludge drying device; 2 is a second sludge drying device; 3, dust removing equipment;
11 is a first shell; 12 is a first feed inlet; 13 is a first discharge hole; 14 is a first steam inlet; 15 is a first drainage port; 16 is a first evaporation gas outlet; 17 is a first steam outlet; 21 is a second housing; 22 is a second feed inlet; 23 is a second discharge hole; 24 is a second steam inlet; 25 is a second liquid outlet; 26 is a second evaporation gas outlet; 27 is a third steam inlet; 28 is a third liquid outlet; 29 is a third steam outlet; 31 is a fourth steam inlet; 32 is a fourth steam outlet; 33 is a fifth steam inlet; 34 is a collecting hopper; 35 is a baffle plate;
111 is a first spiral shell; 112 is a first chamber; 113 is a first jacket chamber; 114 is a first spiral plate; 211 is a second spiral shell housing; 212 is a second chamber; 213 is a second jacket chamber; 214 is a second spiral.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment of the invention provides a sludge drying system, which is used for drying sludge and comprises the following components in percentage by weight as shown in fig. 1: a first sludge drying device 1 and a second sludge drying device 2; referring to fig. 2A, the first sludge drying apparatus 1 is provided with a first steam inlet 14, the second sludge drying apparatus 2 is provided with a second boil-off gas outlet 26, and the second boil-off gas outlet 26 is connected with the first steam inlet 14 through a pipeline. In the embodiment of the invention, the sludge dried by one sludge drying device in the prior art is divided into two stages for drying after being researched by the inventor, and the drying treatment is continuously carried out in the second sludge drying device after the sludge dried by the first sludge drying device. According to the embodiment of the invention, the hot steam evaporated from the sludge in the second sludge drying device is fully utilized as the heat energy of the first sludge drying device to carry out drying treatment on the new sludge entering the first sludge drying device. In addition, because the new sludge in the first sludge drying device has low-temperature characteristics, the hot steam evaporated from the sludge in the second sludge drying device can be condensed. For the whole sludge drying system, the consumption of hot steam is reduced, the consumption of circulating condensed water is also reduced, the sludge drying cost is reduced, and the purposes of energy conservation and environmental protection are achieved.
Of course, the first sludge drying apparatus and the second sludge drying apparatus in the embodiment of the present invention should further include existing structural components in order to implement drying treatment of sludge, and the following description is given in the embodiment, but the specific structure is not limited thereto. Referring to fig. 2A and 2B, an example of a specific structure of the first sludge drying apparatus in this embodiment may include a first housing 11, and a first feed port 12 and a first discharge port 13 that are disposed at two ends of the first housing 11, where the first feed port faces upward to facilitate the entry of sludge, the first discharge port faces downward to facilitate the discharge of sludge, sludge to be dried enters from the first feed port 12 and is discharged from the second feed port 13, and after hot steam enters the first sludge drying apparatus from a first steam inlet 14, drying is performed in a cavity formed in the first housing 11, and the hot steam is condensed to form condensate and is discharged through a first discharge port 15 disposed at the bottom of the first housing 11. When sludge in the first sludge drying device is dried, steam generated by evaporation of moisture in the sludge is discharged through the first evaporation gas outlet 16 arranged on the first shell, and the steam contains dust and oil and needs to be further subjected to condensation treatment and the like by using a condensing device.
An example of the specific structure of the second sludge drying apparatus in this embodiment, as shown in fig. 3A, 3B, and 3C, may include: the second casing 21 to and set up second feed inlet 22 and the second discharge gate 23 at second casing 21 both ends, the second feed inlet makes things convenient for mud to get into up, and the second discharge gate makes things convenient for mud to discharge down, and the mud that is treated by the mummification gets into from second feed inlet 22, discharges from second feed inlet 23. Steam enters through the second steam inlet 24, the condensate is discharged through the second liquid outlet 25 after heat exchange, and hot steam evaporated from the sludge during heat exchange is discharged through the second vapor outlet 26. Of course, in this embodiment, each of the feeding inlet, the discharging outlet, the air inlet, the air outlet, and the like of the first sludge drying apparatus and the second sludge drying apparatus is provided with a valve, so that each apparatus forms an independent working unit with stable environment, and the pressure of the drying environment can be conveniently adjusted.
In an alternative embodiment, referring to fig. 2B, the first sludge drying apparatus 1 may comprise: a first housing 11 and a first reel housing 111 disposed inside the first housing 11; the first spiral shell 111 divides the cavity enclosed by the first shell 11 into a first chamber 112 and a first jacket chamber 113; a plurality of first spiral discs 114 are arranged in the first chamber 112, and the first spiral discs 114 are used for conveying dried sludge; the first steam inlet 14 communicates with the first jacket chamber 113. In the internal structure of the first sludge drying apparatus in this embodiment, the apparatus is integrally divided into two chambers by the first spiral shell casing, wherein the first chamber is used for installing the first spiral shell, and sludge to be dried is conveyed and dried on the first spiral shell; the first jacket cavity is positioned at the lower part of the first cavity and used for receiving hot steam as a heat source to heat and dry the sludge in the first cavity. In addition, in this embodiment, by providing a plurality of first spiral plates, as shown in fig. 2A, the first spiral plate housing transported by the spiral plates is used as a heat exchange interface, and the heat exchange interface is U-shaped, so that the contact area between the hot steam in the first jacket cavity and the sludge having low temperature characteristics which has just been subjected to drying treatment is increased, the water-containing sludge is spirally pushed to advance in the U-shaped surface, and the sludge is heated by the shell side heating method. The steam after condensation is discharged from a first discharge port 16 at the bottom of the first jacket chamber for further effluent treatment of the condensate.
Further, the first sludge drying apparatus 1, as shown in fig. 2A and 2B, is further provided with a first steam outlet 17, and most of the steam is condensed into liquid after heat exchange in the first jacket chamber 113 and then discharged through the first liquid outlet 15. However, in order to avoid the influence on the heat exchange capacity of the entire equipment when the steam quality (steam quality means the level of heat energy contained in steam, and generally speaking, the higher the steam pressure and temperature, the more heat energy contained, the higher the steam quality) entering the first jacket chamber is lowered, the steam of low quality that is not condensed is discharged through the first steam discharge port 17.
In another alternative embodiment, referring to fig. 3A and 3B, the second sludge drying apparatus 2 may include: a second housing 21 and a second solenoid housing 211 disposed inside the second housing 21; the second spiral shell 211 divides the cavity enclosed by the second shell 21 into a second chamber 212 and a second jacket chamber 213; a second spiral plate 214 with a double-spiral-plate meshing structure is arranged in the second chamber 212 and is used for conveying and crushing the dried sludge; a second steam inlet 24 and a second liquid outlet 25 are arranged at the center of the second spiral disc, and the dried sludge is dried by using a center heating mode; the second boil-off gas outlet 26 is located on the second housing 21, communicating with the second chamber 212. In the internal structure of the second sludge drying apparatus in this embodiment, the apparatus is also integrally divided into two chambers by the second spiral shell casing, wherein the second chamber is used for installing the second spiral shell, and the sludge to be dried is conveyed, crushed and dried on the second spiral shell; the second jacket cavity can wrap the second cavity, so that heating is more uniform, and the heating area is larger. Moreover, in the process of conveying the dried sludge, the sludge is easy to agglomerate to form sludge agglomerates with oil-in-sludge due to the reduction of moisture in the sludge, the outside of the sludge agglomerates is dried, but the inside of the sludge agglomerates is still wrapped by a large amount of non-dried water-containing sludge (statistical experiments prove that the sludge is easy to agglomerate when being dried to about 50%), the sludge agglomerates are crushed by the second spiral disc with the double-spiral disc meshing structure, the contact surface of the dried sludge is updated, and the drying is more thorough. It is understood that the second screw plate in this embodiment is in a horizontal engagement configuration, which is not described in detail in this embodiment. Center heating is carried out through the passageway that is located in the middle of the second spiral shell dish in this embodiment, and pure hot steam passes through the second steam inlet and gets into, and the condensate passes through the second leakage fluid dram after the condensation and discharges, and of course, the hot steam that does not condense also can discharge through the second leakage fluid dram, because here exhaust steam is pure hot steam, so need not special treatment.
Further, in order to improve the heat exchange capability in the second sludge drying apparatus, the second sludge drying apparatus in the embodiment of the present invention further performs a heat exchange treatment by using a jacket heating method. Therefore, the second housing 21 of the second sludge drying apparatus is further provided with a third steam inlet 27 and a third liquid outlet 28; a third steam inlet 27 is positioned at the upper part of the second casing 21, and a third liquid outlet 28 is positioned at the bottom of the second casing 21; the third steam inlet 27 and the third liquid discharge port 28 communicate with the second jacket chamber 212, respectively. High-grade pure steam enters the second jacket cavity through the third steam inlet, and generated condensate (water) is discharged through the third liquid discharge port after heat exchange is carried out between the high-grade pure steam and the second spiral shell. Of course, referring to fig. 3A, the second sludge drying apparatus in this embodiment may further be provided with a third steam outlet 29 for discharging uncondensed steam with lower grade in the second jacket chamber to improve the heat exchange efficiency.
In another alternative embodiment, as shown in fig. 1, the system may further include: the dust removing device 3 is provided with a fourth steam inlet 31 and a fourth steam outlet 32, the fourth steam inlet 31 is connected with the second evaporation gas outlet 26 through a pipeline, and the fourth steam outlet 32 is connected with the first steam inlet 14 through a pipeline. Since the steam discharged from the second evaporation gas outlet is evaporated from the water-containing sludge, the steam contains oil and dust, and the steam needs to be dedusted to avoid damage of the dust to the first sludge drying device.
Furthermore, in order to make up for the shortage of the grade of the steam discharged from the second evaporation gas outlet of the second sludge drying device, in the embodiment of the present invention, the steam with high grade needs to be supplemented before being discharged into the first sludge drying device, so that the grade of the steam can be improved, the temperature difference between the steam and the new sludge in the first sludge drying device is increased, and the heat exchange rate is improved. For the convenience of process design, referring to fig. 1, the inventor of the present application sets a fifth steam inlet 33 on the dust removing device 3, where the fifth steam inlet is externally connected to a steam pipeline, and obtains high-grade pure steam from the steam pipeline, so that the steam is mixed in the dust removing device to improve the grade of the steam.
In a more specific embodiment, referring to fig. 4A and 4B, the embodiment of the present invention further provides a specific structure of a dust removing apparatus, the dust removing apparatus comprises a plurality of chambers, a collecting hopper 34 for collecting dust is connected to a lower end of each chamber, a baffle plate 35 is suspended at an upper end of each chamber, when oil-containing and dust-containing steam evaporated from sludge passes through the dust removing apparatus, an air flow is blocked by the baffle plate, and dust contained in the steam is adsorbed by the baffle plate and sinks into the collecting hopper. Optionally, the distance between the front plates of the baffle plate is large, the distance between the rear plates of the baffle plate is small, and movable scrapers are arranged between the plates and can scrape oil sludge adsorbed on the baffle plate. The embodiment of the present invention does not limit the specific structure of the dust removing device, as long as the dust removing function can be achieved.
Based on the same invention concept, the embodiment of the invention also provides an application of the sludge drying system in a refining system. For example, the sludge drying system can be used for drying the oily and aqueous sludge generated in the petroleum refining system, and the beneficial effects and specific examples of the application can refer to the system, and the repeated parts are not described again.
Based on the same inventive concept, the embodiment of the invention also provides a refining system, which can comprise the sludge drying system. The beneficial effects and specific examples of the system can refer to the sludge drying system, and repeated parts are not described again.
Example 2
Based on the same inventive concept, an embodiment of the present invention further provides a sludge drying method, which, as shown in fig. 5, may include the following steps:
and step S51, drying the dried sludge in a first sludge drying device.
And step S52, drying the dried sludge dried by the first sludge drying device in a second sludge drying device.
And step S53, discharging steam evaporated from the dried sludge dried in the second sludge drying device through a second evaporation gas outlet arranged on the second sludge drying device, and discharging the steam into the first sludge drying device through a first steam inlet arranged on the first sludge drying device.
With reference to the process flow diagram of sludge drying treatment in fig. 6, the specific implementation process of the specific steps of the method in the embodiment of the present invention is to perform drying in the second sludge drying device after drying in the first sludge drying device, and to fully utilize the hot steam evaporated from the second sludge drying device as the heat source of the first sludge drying device for drying treatment. Moreover, because the new sludge in the first sludge drying device has low-temperature characteristics, the hot steam evaporated from the sludge in the second sludge drying device can be condensed. For the whole sludge drying system, the consumption of hot steam is reduced, the consumption of circulating condensed water is also reduced, the sludge drying cost is reduced, and the purposes of energy conservation and environmental protection are achieved.
In an optional embodiment, in the first sludge drying apparatus in the embodiment of the present invention, the multiple first spiral discs with a multi-spiral disc structure are adopted to transmit the dried sludge, and the second sludge drying apparatus adopts the second spiral disc with a double-spiral disc meshing structure to transmit and crush the dried sludge, and the specific structure and beneficial effects may refer to the description in the above system, and repeated parts are not described again.
In a specific embodiment, in order to avoid heat loss of sludge dried by the first sludge drying apparatus, in the embodiment of the invention, dried sludge discharged from the first sludge drying apparatus is conveyed from the first sludge drying apparatus to the second sludge drying apparatus by the third spiral disk with hot nitrogen protection.
In another optional embodiment, the first sludge drying device adopts a shell-side heating mode to perform drying treatment on the dried sludge; the second sludge drying device adopts a central heating mode to carry out drying treatment on the dried sludge. The specific structure and beneficial effects can refer to the description in the system, and repeated descriptions are omitted.
In another optional embodiment, the second sludge drying device further adopts a jacket heating mode to perform drying treatment on the dried sludge. The specific structure and beneficial effects can refer to the description in the system, and repeated descriptions are omitted.
In another alternative embodiment, the steam is dedusted before being discharged to the first sludge drying apparatus. The specific structure and beneficial effects of the dust removing device can refer to the description in the system, and repeated descriptions are omitted.
In another alternative embodiment, the steam is upgraded by adding high grade steam to the steam or heating the steam prior to discharging the steam to the first sludge drying apparatus. Specifically, high grade steam can be added to the dust removal equipment and mixed to improve the grade of the steam.
In another optional embodiment, the first sludge drying device performs drying treatment on the dried sludge under the condition of normal pressure or negative pressure; and the second sludge drying equipment is used for drying the dried sludge under the positive pressure condition. In an embodiment of the present invention, the pressure in the second sludge drying apparatus is increased to increase the temperature of steam, such as steam with a temperature higher than 100 ℃ under normal pressure, which is evaporated from the sludge in the second sludge drying apparatus. In the first sludge drying device, under the condition of normal pressure or negative pressure, the evaporation temperature of water in the water-containing sludge can be reduced, and the heat exchange efficiency of secondary steam (steam evaporated from the sludge in the second sludge drying device in the embodiment of the invention) and new water-containing sludge is improved.
In a specific production example, the system and the method provided in the embodiment of the present invention are adopted, that is, a two-stage multi-spiral disc sludge drying apparatus is adopted, heat of secondary steam can be fully utilized, in the case of 1 ton of wet oil sludge with 90% water content, an apparatus of a drying chamber in the prior art is adopted to perform drying treatment, when the oil sludge is dried to 40% water content, about 1.1 ton of steam with 0.3Mpa is required, and about 37 tons of circulating cooling water are required; secondly, by adopting the two-stage thermal coupling sludge drying system in the embodiment of the invention, about 0.55 ton (theoretical value) of 0.3Mpa steam is needed for drying under the same condition, and about 18.5 ton (theoretical value) of circulating cooling water is needed; the actual consumption of steam is 0.65 ton, the circulating cooling water is 22.5 ton, the heat energy and the cooling water are saved by about 40 percent, and the production cost is greatly saved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (16)
1. A sludge drying system, comprising: the system comprises a first sludge drying device and a second sludge drying device; the first sludge drying equipment is provided with a first steam inlet, the second sludge drying equipment is provided with a second evaporation gas outlet, and the second evaporation gas outlet is connected with the first steam inlet through a pipeline.
2. The system of claim 1, wherein the first sludge drying apparatus comprises: the first screw disc shell is arranged in the first shell; the first spiral shell divides a cavity surrounded by the first shell into a first cavity and a first jacket cavity; a plurality of first spiral discs are arranged in the first chamber and used for conveying dried sludge; the first steam inlet is in communication with the first jacket chamber.
3. The system of claim 1 or 2, wherein the second sludge drying apparatus comprises: the second shell and the second spiral shell arranged in the second shell; the second spiral shell divides a cavity surrounded by the second shell into a second cavity and a second jacket cavity; a second spiral disc with a double-spiral-disc meshing structure is arranged in the second chamber and used for conveying and crushing the dried sludge; a second steam inlet and a second liquid outlet are formed in the center of the spiral disc; the second boil-off gas outlet is located on the second housing and is in communication with the second chamber.
4. The system of claim 3, wherein the second enclosure is further provided with a third steam inlet and a third liquid drain; the third steam inlet is positioned at the upper part of the second shell, and the third liquid outlet is positioned at the bottom of the second shell; the third steam inlet and the third liquid outlet are respectively communicated with the second jacket cavity.
5. The system of claim 3, further comprising: and the dust removal equipment is provided with a fourth steam inlet and a fourth steam outlet, the fourth steam inlet is connected with the second evaporation gas outlet through a pipeline, and the fourth steam outlet is connected with the first steam inlet through a pipeline.
6. The system of claim 5, wherein the dust removal device is further provided with a fifth steam inlet, the fifth steam inlet circumscribing a steam conduit.
7. A method of sludge drying comprising: the dried sludge is dried in a first sludge drying device, and the method is characterized by further comprising the following steps:
drying the dried sludge dried by the first sludge drying equipment in a second sludge drying equipment;
and discharging the steam evaporated from the dried sludge in the drying treatment in the second sludge drying equipment through a second evaporation gas outlet arranged on the second sludge drying equipment, and discharging the steam into the first sludge drying equipment through a first steam inlet arranged on the first sludge drying equipment.
8. The method according to claim 7, wherein the first sludge drying device uses a plurality of first discs with a multi-disc structure to transport the dried sludge, and the second sludge drying device uses a second disc with a double-disc meshing structure to transport and crush the dried sludge.
9. The method of claim 7, wherein the dried sludge is transferred from the first sludge drying apparatus to the second sludge drying apparatus via a third screw pan with a hot nitrogen blanket.
10. The method according to claim 7, wherein the first sludge drying device is used for drying the dried sludge by shell-side heating; and the second sludge drying equipment adopts a central heating mode to carry out drying treatment on the dried sludge.
11. The method of claim 10, wherein the second sludge drying device further performs drying treatment on the dried sludge by jacket heating.
12. The method according to any one of claims 7 to 11, wherein the steam is dedusted before being discharged to the first sludge drying device.
13. The method according to any one of claims 7 to 11, wherein the steam is subjected to addition of high-grade steam or heating to improve the grade of the steam discharged into the first sludge drying apparatus before being discharged into the first sludge drying apparatus.
14. The method according to any one of claims 7 to 11, wherein the first sludge drying device is used for drying the dried sludge under normal pressure or negative pressure; and the second sludge drying equipment is used for drying the dried sludge under the positive pressure condition.
15. Use of a sludge drying system according to any one of claims 1 to 6 in a refinery system.
16. An refining system comprising the sludge drying system according to any one of claims 1 to 6.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888453A (en) * | 1997-01-29 | 1999-03-30 | Riverside County Eastern Municipal Water District | Continuous flow pasteurization of sewage sludge |
| CN104150726A (en) * | 2014-07-25 | 2014-11-19 | 中国环境科学研究院 | Reducing sludge treatment device and sludge drying method |
| CN108439763A (en) * | 2018-05-28 | 2018-08-24 | 北京艺高人和工程设备有限公司 | A kind of two-period form thin layer sludge drying system |
| CN109574453A (en) * | 2018-12-28 | 2019-04-05 | 联合瑞升（北京）科技有限公司 | A kind of evaporation energy-saving system of sludge heat drying |
| CN110482826A (en) * | 2019-07-19 | 2019-11-22 | 中国市政工程中南设计研究总院有限公司 | Sludge step anhydration system and method based on MVR Yu vacuum combination technique |
-
2021
- 2021-02-22 CN CN202110198816.XA patent/CN113087359A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5888453A (en) * | 1997-01-29 | 1999-03-30 | Riverside County Eastern Municipal Water District | Continuous flow pasteurization of sewage sludge |
| CN104150726A (en) * | 2014-07-25 | 2014-11-19 | 中国环境科学研究院 | Reducing sludge treatment device and sludge drying method |
| CN108439763A (en) * | 2018-05-28 | 2018-08-24 | 北京艺高人和工程设备有限公司 | A kind of two-period form thin layer sludge drying system |
| CN109574453A (en) * | 2018-12-28 | 2019-04-05 | 联合瑞升（北京）科技有限公司 | A kind of evaporation energy-saving system of sludge heat drying |
| CN110482826A (en) * | 2019-07-19 | 2019-11-22 | 中国市政工程中南设计研究总院有限公司 | Sludge step anhydration system and method based on MVR Yu vacuum combination technique |
Non-Patent Citations (1)
| Title |
|---|
| 潘永康等: "《现代干燥技术》", 31 May 2007, 化学工业出版社 * |
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Application publication date: 20210709 |