TWI522173B - Hybrid heating apparatus applicable to moving granular bed - Google Patents

Description

Hybrid heating device for flow type granular bed

The invention relates to a hybrid heating device, which can be applied to a flow type granular bed, and particularly to a plurality of heat sources such as a mixed direct contact and introduction of a high temperature exhaust gas, and can simultaneously and uniformly heat the substance to reduce the total thermal resistance of the system. Hybrid heating unit.

The existing heating devices are mostly supplied to the heating tank in the form of a single heat source. The most common form is to use a component such as a fire source, a quartz tube, or an electric heating plate to be placed under the heating tank, by directly burning the fuel or It is converted into heat energy by using electric energy, and is indirectly transferred to the heated substance through the tank of the heating tank.

Under this heating form, the portion where the heat is first obtained and the temperature gradually rises is the substance near the bottom of the heating tank. If the substance to be heated is liquid, it is still liquid through the heating process. The convection is formed by its easy-flowing nature, allowing better transfer of heat so that the entire heated material can raise the temperature in a more uniform manner.

However, even if the liquid has a high viscosity coefficient, it is not easy to generate convection, so that the heat energy provided by the heat source is excessively concentrated in the area near the bottom of the heating tank, resulting in uneven heating, which may cause some substances to remain due to heat. Excessive heating and deterioration.

When the heated material is a particulate material such as a filter material, the contact area between the particles is small and inconsistent, and the thermal resistance (R) thereof is increased, which is a major obstacle to heat conduction. The thermal resistance is defined as ΔT/q (°C/W or K/W), where ΔT(=T _i -T _o ) is the temperature difference between the two contact faces, and q is the heat transfer energy. Here, the thermal resistance R _t of the overall system includes a conduction thermal resistance R _cd and a convection thermal resistance R _cv , wherein the conduction thermal resistance R _cd is a blocking effect when heat is transferred by heat conduction, with heat For example, the passing filter material is defined as Δx/(kA), where Δx is the thickness or distance of the heat conductor, k is the heat transfer coefficient, and A is the heat transfer area of the two. In addition to the interface between the filter materials and the actual contact, the non-substantially contacted portion has a gap in the interface, that is, has a convective thermal resistance R _cv . The convective thermal resistance R _cv is the thermal resistance between the solid wall and the fluid, defined as 1/(hA). Where h is the heat convection coefficient and A is the heat exchange area.

In view of the fact that the material in the heating bath is heated, the thermal energy provided by the system is hindered during the transfer due to the above-mentioned conduction thermal resistance R _cd and the convective thermal resistance R _cv . In order to increase the efficiency of heating, it is necessary to slow down the effects of these thermal resistances. In this regard, the improvement of the heating tank structure design, the external force work to stir the material, the introduction of external heating gas, or the change of the heat source aspect is an option that can be considered.

In the method for solving the above problems, one is to stir the material by means of external force work, and this tumbling action is to move the particles closer to the heat source to the lower temperature region after heating and heating. And not only rely on the existing heat transfer path, in addition, the higher temperature particles can contact the original non-adjacent particles due to the tumbling action, shortening the heat transfer path, that is, the tumbling action can mainly reduce the overall conduction heat resistance of the system R _cd On the other hand, in the tumbling process, the gas flow between the particles is also promoted, and some micro-assisting reduces the effect of the convective heat resistance R _cv , so that the uniformity of the overall heat energy transfer is improved, but in fact, it is not easy to simply pass through the tumbling The material close to the top can be uniformly heated with the underlying material, because only the self-rotation of the integral heating tank can impart sufficient degree of turbulence, but the self-rotating motion is not a universal system and is not suitable in most cases, and Both its setup and operating costs will increase.

Another way is to change the state of the heat source, for example, to make the heat source into a curved pipeline form to increase the range and area of heat supply, but in industrial large heating tanks, even if these curved quartz heating tubes are used Or the pipeline filled with the high-temperature liquid and gas is densely laid on the inner wall of the heating tank, and the capacity of the heating tank near the center still lacks heat supply, and there is still room for improvement.

The Republic of China Patent Publication No. TW M302002 discloses a drying apparatus which combines two kinds of heat sources to dry the substance, which is a kiln body in the appearance structure, and the inside is guided upward by the hot gas, and upward. The vent hole is heated, and a plurality of heating platforms are disposed inside and heated by the electric heating seat; however, the device combining the dual heat sources is only suitable for placing a plurality of single products, and the individual products are not in contact with each other. Heat conduction, but arranged on the electric heating seat for heating and drying, the application range is quite narrow, and the internal space is not effectively utilized to fill the full material for uniform heating. Therefore, the true hybrid heating device is still to be implemented with the breakthrough of new technology.

In order to effectively solve the problems that the conventional technology cannot overcome, the present invention proposes a novel structural design and method, and the thermal resistance including the system includes the conduction thermal resistance R _cd and the convective thermal resistance R _{cv ,} etc. And changing the structure of the heating tank, and reducing the resistance of the two to heat conduction in different ways. Wherein, in the part for conducting the thermal resistance R _cd , the present invention uses a plurality of sets of heating rods simultaneously inserted into the heating tank body to control the state of its distribution, so that heat can be more uniformly conducted in the heating tank body, and the conduction heat resistance is lowered. R _cd ; and in the problem of convective thermal resistance R _cv , the hot gas with sufficient heat can be introduced into the tank through the installation of the pipeline to reduce the thermal resistance of the heat convection. At the same time, the total thermal resistance R _{t of the} system is also reduced, which improves the heating efficiency and solves the problem that the industry needs to be affected by long-term operation in the heating process.

In view of the foregoing problems and the conventional techniques that are difficult to provide an effective solution, the main object of the present invention is to provide a hybrid heating device that utilizes different heat sources while being inside and outside the body of the storage tank. A system that combines heat and gas heating and electric heating; it is used not only by a single type, style of heating unit, but also in a single direction or only part of the body of the receiving tank. Heating, but under the advantage of comprehensive use of various heating units, the material inside the receiving tank body is uniformly heated.

A secondary object of the present invention is to provide a hybrid heating device that can be inserted into the accommodating groove body by means of an elongated electric heating rod, thereby providing a heat source inside the accommodating groove to reduce only In the peripheral heating state, the electric heating rods have a different arrangement, which makes the temperature distribution in the system more uniform, and allows the user to adjust the geometric arrangement according to the situation, and has flexibility.

A further object of the present invention is to provide a hybrid heating device which uses a heating gas in addition to a direct contact type electric heating rod, and also uses a heating gas to flow upward from the lower side of the accommodating tank body. The flow of the heated filter material can increase the uniform heating state of the system. Compared with the case where the gas does not flow, the heat convection effect can be increased due to the flow phenomenon of the heating gas, that is, the convective thermal resistance R _cv is reduced. As a result, the thermal resistance R _{t is} also lowered, and the effect of heat transfer is enhanced. Further, in combination with other devices or systems, the exhaust gas and waste heat are sufficiently reused to reduce energy consumption and environmentally friendly properties.

A further object of the present invention is to provide a hybrid heating device which is mainly heated by waste heat gas and supplemented by an electric heating system, that is, the core of the technology is low energy consumption, and the original heat is discharged as much as possible. Wasted waste heat can be re-assigned to use value. At the same time, with the participation and cooperation of the electric heating system, the heating effect is more uniform, and it has various advantages such as industrial utilization and energy saving and carbon reduction. Moreover, in the present invention, when the waste heat is introduced through the waste heat pipe through the exhaust system, the power consumed is much smaller than the energy consumed by the additional combustion energy to heat the gas, and the benefit of recycling exists.

In order to achieve the above object, the present invention discloses a hybrid heating device, comprising: a receiving groove body having an accommodating space therein, and having an upper opening portion and a lower opening portion at upper and lower ends; a cover body is disposed on the upper opening portion, and a plurality of insertion holes are formed on the surface thereof; at least one inner heating unit is respectively inserted into the insertion holes to enter the accommodating space downward; and a gas distributor The waste heat gas is disposed in the lower opening portion, and the waste heat gas is introduced into the accommodating space by uniformly introducing a plurality of air holes into the accommodating space. According to this structure, the hybrid heating device of the present invention, under the interaction of a plurality of heat sources, enables the user to quickly and uniformly obtain good heating under the energy-saving mechanism after filling the heated material in the accommodating space. benefit.

1‧‧‧ housing slot body

11‧‧‧Upper opening

12‧‧‧ Lower opening

13‧‧‧ accommodating space

14‧‧‧ hollow layer

15‧‧‧ Filter material export

2‧‧‧ cover

21‧‧‧ jack

22‧‧‧ Filter inlet

3‧‧‧Inside heating unit

31‧‧‧Long heating unit

32‧‧‧Short heating unit

33‧‧‧Temperature measurement unit

4‧‧‧ gas distributor

41‧‧‧ gas outflow hole

42‧‧‧Gas inflow zone

43‧‧‧Baffle structure

431‧‧‧ openings

5‧‧‧External heating unit

6‧‧‧Exhaust duct

7‧‧‧ Filter media

8‧‧‧ lining

81‧‧‧jet holes

9‧‧‧Flange

91‧‧‧Blind flange

A _w ‧‧‧Waste hot gas

The first drawing is a schematic view of the structure of the present invention; the second drawing is a schematic diagram of the internal structure of the present invention; the third A: it is the top view of the gas outflow hole of the gas distributor in the present invention. Show The third diagram is a schematic diagram of the gas inflow hole of the gas distributor in the present invention; the fourth diagram is a schematic diagram of the baffle structure of the gas distributor in the present invention; It is a schematic structural view of the inner liner in the present invention; FIG. 5B is a schematic structural view of the inner liner when the invention is installed; and a sixth diagram: it is a hollow layer of the present invention. Location map.

For a better understanding and understanding of the features and advantages of the present invention, the preferred embodiments and the detailed description are as follows: First, please refer to the first and second figures together. The structure of the present invention is as shown in the figure; as shown in the figure, the hybrid heating device comprises: a receiving tank body 1, an upper opening portion 11, a lower opening portion 12, and a cover body 2; a plurality of jacks 21, at least one inner heating unit 3, a gas distributor 4, and an outer heating unit 5; wherein the upper and lower ends of the accommodating tank body 1 are respectively an upper opening portion 11 and a lower opening portion 12, The cover body 2 is disposed on the upper opening portion 11, and the plurality of insertion holes 21 are formed on the surface of the cover body 2, and the insertion holes 21 respectively have a flange 9 (Flange) as the inner heating unit 3 Connector.

In addition, the inner heating unit 3 is respectively inserted into the plurality of insertion holes 21 to enter the inside of the accommodating groove body 1; the gas distributor 4 is disposed at the lower opening portion 12 of the accommodating groove body 1; The outer heating unit 5 is wrapped around the outer side of the accommodating groove body 1.

The key technical feature of the present invention is that mixing is achieved by combining heating means of a plurality of heat sources. The purpose of Hybrid Heating. The elements that are heated by the different types of heat sources are the substances in the tank body 1.

Referring to the first and second figures together, the accommodating groove body 1 has an accommodating space 13 for accommodating the heated substance, which is separated from the side and bottom structures of the accommodating groove body 1. Made. In the present invention, the quartz sand (SiO ₂ ) filter material 7 is used as a heating target, and the filter medium 7 is introduced into the accommodating space 13 through the filter material inlet 22 on the cover body 2 for heating.

When the accommodating space 13 has been filled with a considerable amount of the filter medium 7 and is heated, one of the heating heat sources is heated by means of an electric heating device in the form of direct heat conduction. As shown in the first figure, the upper opening portion 11 of the accommodating groove body 1 is covered by the cover body 2 such that the accommodating space 13 is closed by the cover body 2 in this direction. However, the surface of the cover 2 is provided with the insertion hole 21, so that the inner heating unit 3 capable of being elongated can be inserted into the insertion hole 21, and then goes down to the accommodation space 13 in the direction in which the insertion hole 21 is guided, thereby directly Insertion into the filter medium 7 achieves direct contact with the filter medium 7 to efficiently transfer thermal energy.

Herein, the electric heating rods can effectively reduce the thermal conduction resistance R _cd between the filter materials 7 through the distribution thereof, and at the same time, since the surface of the cover body 2 can freely open the plurality of insertion holes 21, the user can freely select the inside according to the needs. The number of insertions and the distribution pattern of the heating unit 3 regulate the degree of supply of thermal energy. Further, in addition to the flexibility in distribution of the inner heating unit 3, the aperture of the insertion hole 21 may be varied, for example, using the insertion holes 21 of different aperture widths, and the heating unit 3 of different specifications is dispersed for use in the present invention. If the socket 21 having the flange 9 does not have the inner heating unit 3 inserted, the blind flange 91 may be provided to be kept closed, or another component such as the temperature measuring unit 33 may be inserted for monitoring as needed. These jacks 21 are used for multi-function purposes.

The length of the inner heating unit 3 itself can also be adjusted depending on the shape of the accommodating space 13, that is, the long heating unit 31 is used at a deep spatial position of the accommodating space 13, and the short heating unit 32 is used instead. Such a manner in which the opening 21 is formed in the lid body 2 to allow the inner heating unit 3 to be inserted for direct contact heating can easily ensure the uniformity of heating.

In addition to the insertion of the inner heating unit 3, another heat source of the present invention may come from the periphery of the accommodating tank body 1. As shown in the first figure, the outer side surface of the accommodating groove body 1 is surrounded by the outer heating unit 5, and the heating unit 5 is composed of at least one electric heating sheet. Compared with the inner heating unit 3, the outer heating unit 5 transfers heat energy from the outer side of the accommodating tank body 1 to the inner side. In addition to transmitting heat energy, the outer heating unit 5 also has a constant temperature effect, and the heat energy is reduced by the accommodating tank body 1 The possibility of escape from the inside to the outside through the side.

In summary, the above-described arrangement and distribution of the heating unit 3 and the external heating unit 5 in the manner of providing direct contact heating are technically characterized in that the uniformity of the supplied thermal energy is increased, which reduces the respective positions in the accommodating space 13. Temperature difference.

In the present invention, the heating ratio of the electric heater is mainly based on the internal heating unit 3, which provides a large proportion of thermal energy, about 90 to 70%, and the external heating unit 5 is assisted by 10 to 30%. It is considered that the external heating unit 5 itself has the possibility of dissipating heat directly to the outside in addition to the heat supply to the accommodating tank body 1. Therefore, the internal heating unit 3 is the main force for direct contact heating, which is a good consideration for energy conservation. .

While using the electric heater to uniformly contact the heating uniformly, the present invention further uses the waste hot gas A _w as a forced convection as a technical means for reducing the convective thermal resistance R _cv and improving the heating effect, that is, External forces, such as fans or pumps, push the high-temperature air fluid into the tank.

In the present invention, the high-temperature waste hot gas A _w for heating is introduced below the accommodating space 13 of the accommodating tank body 1 , which can be derived from the exhaust gas generated by other devices or systems, so that no additional resources are required. If fuel is burned to provide high-temperature gas, the value of these exhaust gases that would otherwise be directly discharged into the atmosphere will be re-used. This high-temperature waste heat of gas A _w perfusion system accommodating space 13 from below upward, and flows upward in waste-heat gas A _w, by the gap between the filter 7, A _w can be waste-heat gas of the gas flow by increasing the heat convection coefficient h That is, the convective thermal resistance R _{cv of the} system is thus reduced, thereby increasing the uniform dispersion of heat.

As described above, the contact area of the filter medium 7 between the interparticle interfaces is relatively small, so that there is a problem that the thermal resistance hinders the heat conduction; and in the method of reducing the thermal resistance, the present invention utilizes the waste hot gas A _w in the forced convection. Next, filling the gap between the particles of the filter material 7 to push the stationary gas in the gap, reducing the convective thermal resistance R _cv and improving the heat transfer efficiency.

Since the exhaust gas conduit 6 guiding the waste heat gas A _{w has} a limited pipe diameter, it is normally smaller than the width of the accommodating tank body 1 , so that the waste heat gas A _w can uniformly bring the air flow thrust and heat energy into the accommodating space. In the present invention, the gas distribution device 4 is connected to the lower opening portion 12 at the lower end of the accommodating tank body 1, and has a plurality of gas outflow holes 41 for introducing the heating gas upward, that is, the aforementioned waste heat gas A _w to the capacity. Set space 13.

The purpose of the gas distributor 4 is to uniformly diffuse the gas into the accommodating tank body 1 in a large area, and the structure thereof has diverse selectivity and is not limited to a single specification, and the simple form thereof is, for example, the third A. The plan view and the third B diagram show that the gas outflow hole 41 and the gas inflow region 42 are respectively disposed on the upper surface and the lower surface of the gas distributor 4, and the filter material outlet 15 is provided in the middle to allow the filter medium 7 to be heated. After being separated, the internal configuration is preferably achieved by directly diffusing the waste heat gas A _w in the space in the gas distributor 4, so that the waste heat gas A _w first enters the gas inflow region 42 and then flows out from the gas more dispersedly. The hole 41 is separated and uniformly enters the accommodating space 13 to heat the filter medium 7 and function to lower the thermal resistance.

The present invention can use a gas distributor 4 having a specific pore ratio/opening ratio for the difference in the substance to be heated or other needs, and also selects the gas distributor 4 of a suitable pore size depending on the size of the material. Taking the heated quartz sand filter material 7 as an example, the gas outflow hole 41 of the gas distributor 4 used has a pore diameter of 2 mm, which is smaller than the diameter of the particles of the filter medium 7, so that it does not directly fall into the gas outflow holes 41. among.

Alternatively, it is also possible to use a style having a baffle structure 43 above the gas outflow hole, as shown in the fourth figure, in which case even if the diameter of the filter medium 7 is smaller than the diameter of the gas outflow hole 41, the baffle structure 43 is Under the protection of the filter material 7, the filter material 7 does not easily fall into the gas outflow hole 41, and the waste heat gas _{Aw is} guided through the opening 431 opened by the baffle structure 43, which has a more flexible flow guiding effect.

In addition to the above-described form of the gas distributor 4, the gas distributor 4 can also be designed to further combine with the structural shape of the accommodating groove body 1, that is, the structure of the gas distributor 4 is further extended to the inside of the accommodating groove body 1, The sleeve is sleeved in the accommodating groove body 1 to be attached to the inner side wall of the accommodating groove body 1, and then the waste heat gas A _{w is} removed from the large amount of gas outflow holes 41 on the surface of the gas distributor 4 On the other hand, the upper side enters the accommodating space 13 and enters the accommodating space 13 from the side to enhance the forced convection of the waste heat gas A _w .

Referring to FIG. 5A and FIG. 5B, the present invention is further provided with a lining body 8 in the accommodating groove body 1 in the form of another gas distributor 4 for improving the heating efficiency, and the lining body 8 is The shape is matched with the accommodating space 13 , and after the upper end is in contact with the inner wall of the accommodating groove body 1 , a lining space 82 is formed between the lining body 8 and the accommodating groove body 1 and can be removed. Under the gas distributor 4, the waste hot gas _{Aw is} directly entered into the accommodating space 13, that is, into the lining space 82, and then further penetrated through the plurality of gas vent holes 81 opened by the lining body 8, and then erupted. Thus, the waste heat gas A _w can flow toward the center from the portion of the accommodating space 13 near the side edge, so that the waste heat gas A _w can more reliably fill the gap between the interfaces of the filter medium 7 . In addition, in the portion of the accommodating groove body 1 that is not covered by the outer heating unit 5, please refer to the sixth figure, which can design a part of the groove wall of the accommodating groove body 1 as a hollow layer 14 to achieve heat through a vacuum. The insulation is such that thermal energy is accumulated in the accommodating space 13.

In combination with the above structural design, the hybrid heating device disclosed by the present invention successfully combines various forms of heat sources, so that it can simultaneously heat substances in the accommodating space, and can ensure these substances at the same time of operation. The obtained heat energy is uniform; in addition, the heat supply degree of the heat source can be easily controlled, for example, adjusting the length of the inserted internal heating unit, the flow rate of the waste heat gas, etc.; and the present invention also has the concept of environmental protection, which is easily transmitted through Leading and directly recycling waste heat generated by other devices or systems reduces the energy cost of the heating device. Therefore, the present invention undoubtedly provides a hybrid heating device with economical and practical value based on various advantages such as heating efficiency, soaking effect, environmental protection and energy saving.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and the variations, modifications, and modifications of the shapes, structures, features, and spirits described in the claims of the present invention. , should be included in the application of the present invention Within the scope of the patent.

1‧‧‧ housing slot body

11‧‧‧Upper opening

12‧‧‧ Lower opening

2‧‧‧ cover

22‧‧‧ Filter inlet

3‧‧‧Inside heating unit

33‧‧‧Temperature measurement unit

4‧‧‧ gas distributor

5‧‧‧External heating unit

6‧‧‧Exhaust duct

9‧‧‧Flange

91‧‧‧Blind flange

A _w ‧‧‧Waste hot gas

Claims (12)

A hybrid heating device comprising: a receiving groove body having an accommodating space therein, and having an upper opening portion and a lower opening portion at upper and lower ends; a cover body disposed at the upper opening portion And a plurality of jacks are formed on the surface thereof; at least one inner heating unit is respectively inserted into the jacks to enter the accommodating space; and a gas distributor is disposed at the lower opening portion, and has a plurality of jacks a gas outflow hole and a heating gas is introduced upward into the accommodating space; wherein an upper surface of the gas distributor has the gas outflow holes, and a lower surface thereof has at least one gas inflow region, and one end of the gas distributor is An exhaust gas conduit is connected. The hybrid heating device of claim 1, wherein the internal heating unit is an elongated electric heating rod. The hybrid heating device of claim 1, further comprising an outer heating unit, the outer heating unit surrounding the outer surface of the receiving groove body. The hybrid heating device of claim 3, wherein the external heating unit is composed of at least one electric heating sheet. The hybrid heating device of claim 3, wherein the internal heating unit provides a ratio of thermal energy greater than a ratio of thermal energy provided by the external heating unit. The hybrid heating device of claim 1, wherein the gas outflow holes have a baffle structure. The hybrid heating device of claim 1, further comprising a lining body disposed in the accommodating tank body and removing the gas distributor to directly enter the accommodating gas space. The hybrid heating device of claim 7, wherein the inner liner body and the inner side wall of the receiving groove body are spaced apart from each other by a lining space. The hybrid heating device of claim 8, wherein a portion of the heating gas first enters the accommodating space via the lining space and through a plurality of gas vent holes of the lining body. A hybrid heating device comprising: a receiving groove body having an accommodating space therein, and having an upper opening portion and a lower opening portion at upper and lower ends; a cover body disposed at the upper opening portion And a plurality of jacks are formed on the surface thereof; at least one inner heating unit is respectively inserted into the jacks to enter the accommodating space; and a gas distributor is disposed at the lower opening portion, and has a plurality of jacks The gas exits the hole and introduces a heating gas upward into the accommodating space; wherein the accommodating groove body further comprises a hollow layer. The hybrid heating device of claim 10, wherein the gas outlet holes have a smaller pore diameter than a plurality of filter media particles in the accommodating space. The hybrid heating device of claim 10, wherein the gas distributor further extends to the side inner wall of the accommodating groove body, and the gas outflow holes are introduced into the heating gas from the side to the side. The accommodation space.