CN115957691A - Sludge treatment equipment - Google Patents
Sludge treatment equipment Download PDFInfo
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- CN115957691A CN115957691A CN202111191200.6A CN202111191200A CN115957691A CN 115957691 A CN115957691 A CN 115957691A CN 202111191200 A CN202111191200 A CN 202111191200A CN 115957691 A CN115957691 A CN 115957691A
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- hydrothermal carbonization
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Abstract
A sludge treatment device comprises a hydrothermal carbonization reaction device and a water flow type stirring device. The hydrothermal carbonization reaction device comprises a jacketed tank body, a feeding port, a discharging port, a hot water injection port and a vapor discharge port, wherein the jacketed tank body can be heated and pressurized in a controlled manner to enable sludge to be subjected to hydrothermal carbonization reaction, the feeding port is arranged at the top of the jacketed tank body and can be opened and closed in a controlled manner to enable sludge to be introduced into the jacketed tank body, the discharging port is arranged at the bottom of the jacketed tank body and can be opened and closed in a controlled manner to enable biomass coal gangue formed by the hydrothermal carbonization reaction to be discharged, the hot water injection port is arranged at the bottom of the jacketed tank body, and the vapor discharge port is arranged at the top of the jacketed tank body. The water flow type stirring device is used for leading hot water into the jacket type tank body from bottom to top through the hot water injection port to generate high-pressure heat turbulent flow so as to stir the sludge and carry out hydrothermal carbonization reaction with the sludge. Therefore, the sludge treatment equipment is particularly suitable for treating a large amount of sludge at one time, and even if the sludge is treated at one time, the sludge treatment equipment is not easy to break down like the traditional mechanical stirring device.
Description
Technical Field
The invention relates to waste treatment equipment, in particular to sludge treatment equipment suitable for carrying out hydrothermal carbonization reaction.
Background
The existing waste water treatment technology often forms sludge by adding a flocculating agent into waste water to precipitate pollutant particles with extremely small particle sizes in the waste water. The sludge has high water content and high viscosity and contains inorganic substances and organic substances, and in order to effectively treat the sludge without energy consumption and causing empty pollution, a technology for treating the sludge by using a hydrothermal carbonization reaction is developed nowadays. However, the sludge formed by adding the flocculant has the problems of strong water retention, difficult dehydration and carbonization drying, and uneven heating and scaling due to high viscosity and easy adhesion to the wall surface of the hydrothermal carbonization reactor, so that the sludge in the hydrothermal carbonization reactor needs to be stirred to be heated uniformly when the sludge is subjected to hydrothermal carbonization reaction, thereby reducing energy consumption.
The heating temperature is an important operating condition for the hydrothermal carbonization reaction of the sludge, and the sludge in the hydrothermal carbonization reactor can be rapidly heated to a temperature required for the hydrothermal carbonization reaction, which is a design point in the development of sludge treatment equipment in the industry. In order to meet the high temperature and high pressure reaction conditions, the wall of the hydrothermal carbonization reactor needs to be very thick to withstand the high pressure and high temperature, but the thick wall causes a heater installed outside the wall of the hydrothermal carbonization reactor to require a long heating time to effectively transfer heat energy to the sludge inside the hydrothermal carbonization reactor, so the sludge in the hydrothermal carbonization reactor is generally stirred in the prior art, and the sludge can be rapidly heated.
The existing stirring technology used in the hydrothermal carbonization reactor is a mechanical stirring device, but the mechanical stirring device is only suitable for processing a small amount (e.g. 10 liters) of sludge at a time, and when a large amount (e.g. 1000 liters) of sludge is to be processed, the sludge needs to be divided into a small amount for batch processing because the mechanical stirring device has the disadvantages of not resisting high temperature and high pressure, and inorganic substances such as clay and sand in the sludge are easy to cause the mechanical stirring device to be worn, and when a large amount of sludge is processed at a time, the mechanical stirring device is more seriously damaged. In addition, with the existing hydrothermal carbonization plant equipment, the capacity of the hydrothermal carbonization reactor is 500L, the temperature of the hydrothermal carbonization reaction reaches above 220 ℃, the sludge needs to be fully stirred by the mechanical stirring device, the required mechanical stirring device is too large and consumes energy, and the mechanical stirring device is easy to damage when a large amount of sludge is treated at one time.
Therefore, there is still a need to develop a novel sludge treatment apparatus to solve the need for treating a large amount of sludge at a time, and to uniformly heat the sludge even in the case of treating a large amount of sludge at a time.
Disclosure of Invention
The invention aims to provide sludge treatment equipment suitable for treating a large amount of sludge at one time.
The invention relates to sludge treatment equipment, which is suitable for carrying out hydrothermal carbonization reaction on sludge and hot water to convert the sludge into biomass coal gangue, and comprises:
the hydrothermal carbonization reaction device comprises a jacketed tank body, a feeding port, a discharging port, a hot water injection port and a vapor discharging port, wherein the jacketed tank body is used for containing the sludge and can be controllably heated and pressurized so as to enable the sludge to carry out hydrothermal carbonization reaction; and
and the water flow type stirring device is connected with the hydrothermal carbonization reaction device and is used for supplying the hot water, pressurizing the hot water, and then introducing the pressurized hot water into the jacketed tank body from a hot water injection port of the hydrothermal carbonization reaction device from bottom to top under high pressure to generate high-pressure thermal turbulence so as to stir the sludge in the jacketed tank body and perform the hydrothermal carbonization reaction with the sludge.
In the sludge treatment apparatus of the present invention, the water flow type stirring device includes a preheating tank for supplying the hot water, a heating coil disposed downstream of the preheating tank and connected to the jacketed tank body for keeping the hot water warm, a level gauge disposed in the jacketed tank body for monitoring a level of the hot water in the jacketed tank body, and a heat exchanger connected between the steam discharge port and the preheating tank for cooling the steam discharged from the steam discharge port.
The sludge treatment equipment also comprises a vapor recovery device connected with the heat exchanger of the water flow type stirring device, wherein the vapor recovery device is used for recovering the excessive part of the water formed by condensation of the heat exchanger.
In the sludge treatment apparatus of the present invention, the vapor recovery device includes a cooling unit connected to the heat exchanger for cooling excess water discharged from the heat exchanger, and a reservoir provided downstream of the cooling unit for accommodating the water.
The invention has the beneficial effects that: according to the sludge treatment equipment, the hot water is introduced into the jacketed tank body from bottom to top at high pressure through the water flow type stirring device to generate high-pressure heat disturbance flow to stir the sludge, so that compared with a traditional mechanical stirring device, the sludge treatment equipment is particularly suitable for treating a large amount of sludge at one time, and even if a large amount of sludge is treated at one time, the sludge treatment equipment is not easy to break down like the traditional mechanical stirring device.
Drawings
FIG. 1 is a schematic view of an embodiment of a sludge treatment apparatus of the present invention.
Detailed Description
The sludge treatment equipment is suitable for performing hydrothermal carbonization reaction (hydro-thermal carbonization) on sludge and hot water to convert the sludge into bio-coal gangue (bio-coal gap).
The type of sludge (sludge) is such as, but not limited to, industrial sludge or domestic sludge, etc. The sludge contains water, organic matters, inorganic matters and the like, the content of the water, the specific type and content of the organic matters and the specific type and content of the inorganic matters depend on the source of the sludge, and the sludge treatment equipment is suitable for treating various types of sludge, particularly suitable for treating sludge with high water content (for example, sludge with water content of more than 60 percent) and sludge with high organic matter content (for example, sludge with organic matter content of more than 30 percent).
The pressure range of the hydrothermal carbonization reaction is 5 bar-70 bar, and the temperature range is 180-270 ℃.
The biomass coal gangue contains inorganic matters originally contained in the sludge and biomass carbon converted from organic matters in the sludge, and the calorific value of the biomass coal gangue prepared by the sludge treatment equipment is about 500 kcal/kg-5000 kcal/kg, so the biomass coal gangue is particularly suitable to be used as a production raw material of red bricks or cement kilns, and the fuel consumption in the process of manufacturing the red bricks or the cement kilns can be reduced.
Referring to fig. 1, an embodiment of the sludge treatment apparatus of the present invention comprises a hydrothermal carbonization reaction device 1, a water-flow stirring device 2, and a vapor recovery device 3.
The hydrothermal carbonization reaction device 1 includes a jacketed tank 11 for holding the sludge and controllably raising the temperature and pressurizing the sludge for the hydrothermal carbonization reaction, a material inlet 12 provided at the top of the jacketed tank 11 and controllably opening and closing the material inlet for the sludge to enter the jacketed tank 11, a material outlet 13 provided at the bottom of the jacketed tank 11 and controllably opening and closing the material outlet for the discharge of the gangue, a hot water inlet 14 provided at the bottom of the jacketed tank 11, and a steam outlet 15 provided at the top of the jacketed tank 11 and for the discharge of steam generated during the hydrothermal carbonization reaction. The jacketed tank body 11 is mainly heated in an electric heating manner, and hot kerosene is introduced into a jacket of the jacketed tank body 11 to assist in heating and heat preservation, so that the sludge introduced into the jacketed tank body 11 is heated to 180-270 ℃.
The water-flow stirring device 2 is connected to the hydrothermal carbonization reaction device 1. The water flow type stirring device 2 is used for supplying the hot water, pressurizing the hot water, and then introducing the pressurized hot water into the jacketed tank body 11 from the hot water injection port 14 of the hydrothermal carbonization reaction device 1 from bottom to top at high pressure to generate high-pressure thermal turbulence so as to stir the sludge and perform hydrothermal carbonization reaction with the sludge.
The water flow type stirring apparatus 2 includes a preheating tank 21 for supplying the hot water, a heating coil 22 disposed downstream of the preheating tank 21 and connected to the jacketed tank 11 for keeping the hot water warm, a level gauge 23 installed in the jacketed tank 11 for monitoring the level of the hot water in the jacketed tank 11, and a heat exchanger 24 connected between the steam outlet 15 and the preheating tank 21 for cooling the steam discharged from the steam outlet 15.
The preheating tank 21 is configured to heat water to 85-105 ℃ by using hot kerosene to obtain the hot water, the hot water output from the preheating tank 21 is pressurized and then passes through the heating coil 22 for heat preservation, then is conveyed from the heating coil 22 through the hot water injection port 14 and is introduced into the jacketed tank body 11 from bottom to top at a high pressure to generate high-pressure heat turbulent flow so as to stir the sludge, after the hot water entering the jacketed tank body 11 reaches a liquid level preset by the liquid level meter 23, the jacketed tank body 11 is controlled to start temperature rise and pressurization so as to enable the hot water and the sludge to perform the hydrothermal carbonization reaction, after the hydrothermal carbonization reaction is finished, the jacketed tank body 11 is controlled to release pressure so as to enable the hot water in the jacketed tank body 11 to be changed into steam and to be discharged from the steam discharge port 15, then the steam discharged from the steam discharge port 15 is conveyed into the heat exchanger 24 to be condensed into water, the water formed by condensation of the steam is conveyed back to the preheating tank 21 to be reheated into a path from the hot water discharge port 15 ℃ and enters the jacketed tank body 11 again through a part of the tank body 11 again. In addition, according to the actual erection requirement of the sludge treatment equipment, a high-temperature-resistant pump is arranged to pressurize the hot water output from the preheating tank 21. The sludge treatment equipment enables the hot water to be continuously circulated from bottom to top through the path and introduced into the jacketed tank body 11 through the water flow type stirring device 2, and continuously performs high-pressure heat turbulence stirring on the sludge in the jacketed tank body 11, so that the effect of fully stirring the sludge to enable the sludge to be heated uniformly is achieved.
The vapor recovery device 3 is connected to the heat exchanger 24 of the water flow type stirring device 2, and when the water condensed by the heat exchanger 24 is excessive, the vapor recovery device 3 is used for recovering the excessive part of the water condensed by the heat exchanger 24. The vapor recovery device 3 includes a cooling unit 31 connected to the heat exchanger 24 for cooling excess water discharged from the heat exchanger 24, and a reservoir 32 disposed downstream of the cooling unit 31 for containing the water.
In summary, the sludge treatment apparatus of the present invention utilizes the water flow type stirring device 2 to circulate the hot water from bottom to top into the jacketed tank 11 to generate high pressure thermal turbulence, and continuously stir the sludge in the jacketed tank 11, so that the sludge treatment apparatus of the present invention is particularly suitable for treating a large amount of sludge (e.g. 1000 liters) at a time compared to the conventional mechanical stirring device. In addition, the hot water is introduced into the jacketed tank body 11 and also serves as a solvent and a reactant for the hydrothermal carbonization reaction with the sludge, and the hot water is changed into steam after the hydrothermal carbonization reaction and is discharged from the steam discharge port 15, and the produced biomass coal gangue is dehydrated and dried. Therefore, the object of the present invention can be achieved.
It should be understood that the above description is only illustrative of the preferred embodiments of the present invention, and that the scope of the present invention is not limited thereto, and that the present invention is intended to cover all the modifications and equivalents within the scope of the appended claims and the description.
Claims (4)
1. A sludge treatment apparatus adapted to convert sludge into biomass coal gangue by hydrothermal carbonization reaction with hot water, the sludge treatment apparatus comprising:
the hydrothermal carbonization reaction device comprises a jacketed tank body, a feeding port, a discharging port, a hot water injection port and a vapor discharging port, wherein the jacketed tank body is used for containing the sludge and can be controllably heated and pressurized so as to enable the sludge to carry out hydrothermal carbonization reaction; and
and a water flow type stirring device which is connected with the hydrothermal carbonization reaction device and is used for supplying the hot water, pressurizing the hot water, and then introducing the pressurized hot water into the jacketed tank body from the bottom to the top from a hot water injection port of the hydrothermal carbonization reaction device to generate high-pressure thermal turbulence so as to stir the sludge and perform the hydrothermal carbonization reaction with the sludge.
2. The sludge treatment apparatus according to claim 1, wherein the water-flow type stirring device comprises a preheating tank for supplying the hot water, a heating coil disposed downstream of the preheating tank and connected to the jacketed tank body for keeping the hot water warm, a level gauge installed in the jacketed tank body for monitoring a level of the hot water in the jacketed tank body, and a heat exchanger connected between the steam discharge port and the preheating tank for cooling the steam discharged from the steam discharge port.
3. The sludge treatment apparatus according to claim 2, further comprising a vapor recovery device connected to the heat exchanger of the water-flow agitation device, the vapor recovery device being configured to recover an excess portion of water condensed via the heat exchanger.
4. The sludge treatment apparatus according to claim 3, wherein said vapor recovery device includes a cooling unit connected to said heat exchanger for cooling excess water discharged from said heat exchanger, and a reservoir provided downstream of said cooling unit for containing said water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111191200.6A CN115957691A (en) | 2021-10-13 | 2021-10-13 | Sludge treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111191200.6A CN115957691A (en) | 2021-10-13 | 2021-10-13 | Sludge treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115957691A true CN115957691A (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111191200.6A Pending CN115957691A (en) | 2021-10-13 | 2021-10-13 | Sludge treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115957691A (en) |
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2021
- 2021-10-13 CN CN202111191200.6A patent/CN115957691A/en active Pending
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