TWI720843B - A temperature differential type heat treatment method - Google Patents

Abstract

The invention provides a temperature differential type heat treatment system and a method thereof. The treatment system comprises of a heating reactor, a mixing rod and a motor. The two ends of the mixing rod are respectively supported on bearings. The inner wall layer of the heating reactor is a heating layer, the outer wall layer is an insulation layer, and the shaft center of the mixing rod is provided with a heating layer. The temperature differential type heat treatment system and method of the invention, when the heating reactor is heated to the first preset temperature, the heating layer of the heating reactor is turned off, and the heating layer of the mixing rod is kept heating. When the heating layer of the mixing rod is heated to the second preset temperature, the heating layer of the mixing rod is turned off, so that the substance to be treated is heated in two stages, which can not only kill the virus completely, but also the substance to be treated will not be carbonized. In addition it is not easy to stick onto the surface of mixing rod.

Description

A kind of temperature difference heating method

The invention relates to the technical field of heating treatment, in particular to a temperature difference heating treatment system and a heating method thereof.

Highly pathogenic diseases such as avian influenza, foot-and-mouth disease, African swine fever, and new coronavirus pneumonia pose a certain degree of risk to the community environment and public health. It is a fact that residual viruses have been detected in the feces of humans and livestock where the disease occurred.

In traditional agriculture, fecal sewage is often used to directly irrigate the ground to grow vegetables. There is a risk of viruses contaminating crops and infecting humans through crops. Therefore, human, poultry and livestock manure must undergo harmless treatment before crops can be irrigated.

At present, the harmless treatment of human, poultry and livestock manure often uses direct heating. However, it is inevitable that excessive heating will cause organic matter to be carbonized and cause loss of organic matter during the heating process.

For this reason, the technical problem to be solved by the present invention is to provide a temperature-difference heating treatment system and a method thereof, so that the to-be-processed object can not only kill viruses and achieve a harmless effect, but also that the to-be-processed object will not be carbonized.

Therefore, the present invention provides a temperature-difference heating treatment system, comprising: a cylindrical heating reaction furnace, a stirring rod with blades penetrating the heating reaction furnace, and providing power for the stirring rod In the motor, the two ends of the stirring rod are respectively supported on bearings, the inner wall layer of the heating reaction furnace is a heating layer, the outer wall layer is an insulation layer, and the stirring rod shaft is provided with a heating layer.

Wherein, both the heating layer of the heating reaction furnace and the heating layer of the shaft center of the stirring rod are added with heat transfer oil.

Both the heating layer of the heating reaction furnace and the heating layer of the stirring rod axis are provided with electric heating fins.

The heating layer of the heating reaction furnace is connected with the heating layer of the axis of the stirring rod.

The above-mentioned temperature-difference heating treatment system further comprises: a feed door arranged at the top of the heating reaction furnace and a discharge door arranged at the bottom of the heating reaction furnace.

The present invention also provides a temperature-difference heating method, including: putting the object to be processed into a heating reaction furnace, heating the heating reaction furnace and another heating layer in the axis of the stirring rod, and turning on the stirring rod to stir the object to be processed; When the heating layer of the heating reaction furnace is heated to the first preset temperature, stop heating the heating layer of the heating reaction furnace, and continue to keep heating the heating layer of the stirring rod; when the heating layer of the stirring rod is heated to the second preset temperature When the temperature is reached, stop heating the heating layer of the stirring rod; continue to stir the to-be-treated object until the treatment is completed.

Wherein, the second preset temperature is 20-40 degrees higher than the first preset temperature.

The temperature difference heating treatment system and method of the present invention stop heating the heating layer of the heating reaction furnace when the heating layer of the heating reaction furnace is heated to the first preset temperature, and continue to maintain the heating layer of the heating reaction furnace. Heating: When the heating layer of the stirring rod is heated to the second preset temperature, stop heating the heating layer of the stirring rod, so that the material to be treated is heated in two stages, which can not only kill the virus and achieve a harmless effect, but also to be treated The substance will not be carbonized, and it is not related to the mixing by the stirring rod. Easy to stick to the stirring rod. In this way, the organic waste after the harmless treatment can be fermented by microorganisms to become fertilizer or feed suitable for agricultural and livestock applications.

10: Temperature difference heating treatment system

12: Heating reactor

14: Fixed support structure

16: Stirring rod

18, 20: Bearing

22: Power motor

24: Chain device

26: Feed door

28: discharge door

32: inner wall

34: mezzanine wall

36, 44: electric heating film

38: Outer Wall

39: pump

40, 42: oil pipeline

46: Exhaust pipe

[Figure 1] is a schematic diagram of the structure of the temperature difference heating system of the present invention.

[Figure 2] is a schematic diagram of the side view structure of the heating system according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the present embodiment provides a temperature-difference heating treatment system 10 and a heating method, especially for waste organic matter, including: a cylindrical heating reaction furnace 12 arranged on a fixed support structure 14 and heating throughout the entire The stirring rod 16 of the reaction furnace 12 and the power motor 22 that provides power for the stirring rod 16. The two ends of the stirring rod 10 are respectively supported on the bearing 18 and the bearing 20, and the power motor 22 provides power to the stirring rod 16 via the chain device 24 to make the stirring rod 16 rotate.

A feed door 26 is provided on the top of the heating reaction furnace 12, and the feed door 26 in FIG. 1 adopts a horizontal pull opening method, or a top cover opening method. The bottom of the heating reaction furnace 12 is provided with a discharge door 28. When the material is discharged, the discharge door 28 can be opened to discharge the material.

When feeding, the feeding door 26 is opened, and the to-be-processed material is transported to the inside of the heating reaction furnace 12. The to-be-processed material is organic matter, which can be human, poultry and livestock manure, or other organic waste mixtures broken up, such as straw, vines, fallen leaves, corn stalks, pond mud, kitchen waste, etc. Although the humidity of the to-be-processed object is high, it still maintains a solid state, and is fed into the heating reaction furnace 12 through the feed door 26 by a conveyor belt.

The stirring rod 16 agitates the object to be processed in the heating reaction furnace 12, and the blades of the stirring rod 16 from the middle point, that is, the position of the discharge door 28, are mirror-symmetrical when viewed from both sides. Mirror symmetry refers to human-like Symmetry like left and right hands. When the stirring rod 16 agitates the object to be processed, it pushes the object to be processed upward along the inner wall, higher than the middle shaft of the stirring rod 16, and then falls on the middle shaft of the stirring rod 16 and then falls from both sides of the shaft respectively.

FIG. 2 is a side view of the above-mentioned temperature-difference heating treatment system 10, in which the middle axis of the stirring rod 16 is represented by a middle circle, and the cross-shaped structure is the supporting structure on the stirring rod 16. The other four concentric circles are the side views of the blades on the stirring rod 16. In Figure 2, the wall layer of the heating reactor has two layers, namely the inner wall 32 and the sandwich wall 34, which together form a wall layer. Heat transfer oil is added to this wall layer, so this wall layer can also be called Heat transfer oil layer. It is also possible to install electric heating fins 36 between the inner wall 32 and the interlayer wall 34. The electric heating fins 36 may be in multiple groups, and only one group of the electric heating fins 36 is indicated in FIG. 2. Another wall layer is formed between the interlayer wall 34 and the outer wall 38, and the wall layer is provided with thermal insulation material. Therefore, the wall layer can also be referred to as a thermal insulation layer, which is represented by diagonal lines in FIGS. 2 and 1.

In addition to heating in the heat transfer oil layer of the heating reaction furnace 12, the heating method of the temperature difference heat treatment system 10 can also transfer heat inside the stirring rod 16. As shown in FIG. 1, the pump 39 transfers the hot oil through the oil pipe 40. Enter the shaft center of the stirring rod 16, and then return to the heat transfer oil layer through the oil pipe 42. In addition, electric heating fins may also be arranged in the shaft center of the stirring rod 16, and the heating fins may be in multiple groups, and only one group of the electric heating fins 44 is indicated in FIG. 1. The electric heating plate 44 in the axis of the stirring rod 16 is also called the axial electric heating plate.

There are two ways to heat the stirring rod 16, one is to input the heat transfer oil by the pump 39, and the other is to heat by the electric heating plate in the shaft center. These two heating methods can raise the temperature of the shaft center of the stirring rod 16, and then transfer to the blades of the stirring rod 16 through the shaft center of the stirring rod 16.

When the above-mentioned temperature difference heat treatment system 10 performs harmless heat treatment, there are two modes of operation mode 1 and mode 2 operation modes.

The method of the mode 1 operation mode is to turn on the multiple sets of electric heating fins in the heat transfer oil layer and the axial electric heating fins arranged on the stirring rod 16. The power supply of the heating element is usually 380V or 220V. According to the place In order to meet the requirements of harmless virus elimination, the temperature control point of the temperature difference heat treatment system 10 must be higher than the basic temperature for virus elimination. For example, if a certain virus is eliminated, the temperature must be above 55 degrees Celsius. Taking into account the heat transfer loss and time efficiency, the general operating temperature control point will be 20-40 degrees higher than the basic temperature, for example, set at 80 degrees Celsius. And use the pump 39 to circulate the hot oil back and forth. After heating treatment and stirring for a period of time, the discharge door 28 can be opened to discharge the material after the expected treatment effect is achieved.

The method of the mode 2 operation mode is: turn on the multiple sets of electric heating fins in the heat transfer oil layer and the axial electric heating fins arranged on the stirring rod 16. The heating method is the same as that of the mode 1, for example, set at about 55 degrees Celsius. Then the pump 39 and the heating of the heat transfer oil layer are turned off, and the axial heating element continues to be heated to a suitable operating temperature. For example, the operating temperature can be set at 80 degrees Celsius, and the highest can be set to 160 degrees Celsius. The to-be-processed object is stirred by the stirring rod 16, and in the process of stirring and tumbling, the viruses and germs contacting the shaft surface and blades of the stirring rod will die due to heat.

Although the operation methods of mode 1 and mode 2 can kill potential viruses to achieve harmless effects, the actual results are different. The method of mode 1 easily carbonizes the organic matter of the to-be-treated material, so that the feces that have been harmlessly treated are A lot of fertilizer efficiency is lost. Then there is energy consumption. According to calculations, the mode 1 operation mode consumes about 10% to 20% more energy than the mode 2 operation mode. The long-term uninterrupted operation mode 1 operation mode will consume much energy.

The advantage of the mode 2 operation mode is that the to-be-processed requires two stages of heating, namely, the first stage of heating and heating treatment in the same operating mode as the mode 1 and the second stage of heating and heating only by the stirring rod. This will not only kill the virus and achieve a harmless effect, but also the to-be-processed material is not easy to stick to the stirring rod due to the mixing relationship, and the to-be-processed material is not easy to be carbonized, so that the organic waste after the harmless treatment can be passed through The microorganisms are fermented to become fertilizers or feeds suitable for agricultural and livestock applications.

If the operation mode of mode 1 is adopted, the inner wall 32 of the reaction furnace 12 is heated, and the stirring rod The blades of 16 have voids, and when the operating temperature exceeds the basic temperature, they tend to stick to the inner wall 32, and become carbonized by excessive heating. At the same time, the heat transfer effect of the inner wall 32 to the object to be processed is reduced.

In summary, when the temperature difference heat treatment system 10 performs harmless treatment on the object to be treated, the inner wall 32 and the stirring rod 16 are first heated to the basic temperature, such as 55 degrees Celsius as described in the previous paragraph, and then the stirring is increased. The operating temperature of the rod 16 in the inner wall 32, such as the aforementioned temperature of 80 degrees Celsius or higher, can reach a maximum of 160 degrees Celsius. The effect of such heating treatment is high efficiency and energy saving and can reduce the carbonization of organic matter.

There are many other industrial applications for the temperature difference heating operation. For example, in a crude oil storage tank in an oil refinery, after storing crude oil for a period of time, oil sludge will accumulate at the bottom of the tank. This oil sludge cannot be transported to the refinery for operations, because it will easily block the oil pipeline. The oil sludge collected after cleaning the tank cannot be landfilled at will due to the high oil content. If the combustion method is used, it is easy to produce a large amount of polluting waste gas, and the oil sludge shrinks into a block during the combustion process, and the surface of the sludge block is carbonized and the oil is wrapped in it. If the temperature difference heating treatment system and method described in this embodiment are used, first the oil sludge is passed through the feed gate 26 through the conveyor belt. After the feed is completed, the feed gate 26 is closed, and then heated to a basic temperature while stirring . This basic temperature is usually set at 300 to 350 degrees Celsius. Then the heating element of the axis of the stirring rod 16 is reheated to make the axis of the stirring rod 16 reach a suitable operating temperature, usually about 600 degrees Celsius, and the temperature of the blades of the stirring rod 16 is about 520 to 560 degrees Celsius. At this time, while stirring, the oil in the oil sludge is vaporized under anoxic conditions and discharged through the exhaust pipe 46. In this way, the oil in the oil sludge in the system 10 is dried and separated out gradually. After the heating and separation program is completed, the discharge door 28 is opened to discharge the material. If the temperature of the heat transfer oil layer is directly raised to the operating temperature during operation, for example, 600 degrees Celsius. The oily sludge along the inner wall 32 will be like fried coked rice, coking and forming on the inner wall 32, so that the oil in the oily sludge cannot be dried smoothly. Or after unloading, the system 10 should be disassembled to remove the carbides on the inner wall 32 one by one.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

10: Temperature difference heating treatment system

12: Heating reactor

14: Fixed support structure

16: Stirring rod

18, 20: Bearing

22: Power motor

24: Chain device

26: Feed door

28: discharge door

32: inner wall

34: mezzanine wall

38: Outer Wall

39: pump

40, 42: oil pipeline

44: electric heating film

46: Exhaust pipe

Claims (6)

A temperature-difference heating method, comprising: putting the object to be processed into a heating reaction furnace, the heating reaction furnace is provided with a stirring rod with blades penetrating the heating reaction furnace, and a motor that provides power for the stirring rod, and the stirring rod The two ends of the heating reactor are respectively supported on bearings. The inner wall layer of the heating reactor is a heating layer, and the outer wall layer is an insulation layer. Another heating layer is provided in the shaft of the stirring rod to heat the heating reaction furnace and the shaft of the stirring rod. Layer heating, and turn on the stirring rod to stir the object to be processed; when the heating layer of the heating reaction furnace is heated to the first preset temperature, stop heating the heating layer of the heating reaction furnace, and continue to keep heating the heating layer of the stirring rod; When the heating layer of the stirring rod is heated to the second preset temperature, stop heating the heating layer of the stirring rod; continue to stir the to-be-processed object until the processing is completed. The temperature difference heating method according to claim 1, wherein the heating layer of the heating reaction furnace and the heating layer of the shaft center of the stirring rod are both added with heat transfer oil. The temperature difference heating method according to claim 1 or 2, wherein the heating layer of the heating reaction furnace and the heating layer of the shaft center of the stirring rod are both provided with electric heating fins. The temperature difference heating method according to claim 1 or 2, wherein the heating layer of the heating reaction furnace and the heating layer of the shaft center of the stirring rod are in communication. The temperature difference heating method according to claim 1 or 2, which further includes a feed door provided at the top of the heating reaction furnace and a discharge door provided at the bottom of the heating reaction furnace. The temperature difference heating method according to claim 1, wherein the second preset temperature is 20 to 40 degrees higher than the first preset temperature.

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