Quick-burning electric heating energy-saving roller kiln
The fast-firing, energy-saving roller kiln with all-electric heating achieves the low-carbon goal of ceramic production by utilizing electric heating and cooling devices, solving the carbon emissions and environmental pollution problems caused by fossil fuels, and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DLT TECH CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-06-26
AI Technical Summary
Current ceramic production processes primarily rely on fossil fuels such as natural gas and water gas, resulting in high carbon emissions and making it impossible to achieve low-carbon or zero-carbon goals. Furthermore, combustion generates environmental pollution.
The fast-firing, energy-saving roller kiln, which uses all-electric heating, includes a preheating section, an oxidation section, and a firing section. It uses electric heating devices for precise temperature control, combined with cooling devices in the rapid cooling and slow cooling sections, to achieve uniform heating and cooling of the brick blanks, without using any fossil fuels.
It achieves the goal of low carbon emissions in the ceramic production process, reduces environmental pollution, improves production efficiency, and maintains the flatness and quality of the brick blanks.
Smart Images
Figure CN224415679U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of kiln technology, and specifically relates to a fast-firing electric heating energy-saving roller kiln. Background Technology
[0002] Ceramics are products fired at high temperatures, which consumes large amounts of fossil fuels during the firing process. The combustion of fossil fuels produces gases such as carbon dioxide, nitrogen oxides, and sulfides, polluting the environment. Currently, the domestic ceramics industry still mainly relies on fuels such as natural gas and water gas, making it a major carbon emitter and unable to achieve the goal of low-carbon or zero-carbon production. Utility Model Content
[0003] The purpose of this utility model is to provide a fast-firing, electrically heated, energy-saving roller kiln to solve one or more technical problems existing in the prior art.
[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows:
[0005] This utility model discloses a fast-firing, electrically heated, energy-saving roller kiln, comprising a kiln furnace, wherein the kiln furnace is equipped with:
[0006] A conveying device for conveying brick blanks;
[0007] The heating zone includes a preheating section, an oxidation section, and a firing section connected sequentially along the brick conveying direction. Each of the preheating section, the oxidation section, and the firing section is equipped with an electric heating device, and the heating end of each electric heating device is respectively located above and below the conveying device.
[0008] The cooling zone includes a rapid cooling section and a slow cooling section connected sequentially along the brick conveying direction. The first end of the rapid cooling section is connected to the end of the firing section. The rapid cooling section and the slow cooling section are respectively equipped with cooling devices. The cooling end of each cooling device is located above and below the conveying device.
[0009] The present invention has at least the following beneficial effects: the conveying device transports the brick blanks from the heating zone to the cooling zone, thereby completing the firing and rapid cooling of the brick blanks and improving production efficiency.
[0010] The heating zone includes a preheating section, an oxidation section, and a firing section. Three electric heating devices are used to heat and fire the brick blanks conveyed by the conveying device. These devices are located in the preheating, oxidation, and firing sections, allowing the heating temperature of each zone to be precisely set individually for each brick blank, ensuring the brick blanks reach their optimal sintering state within the heating zone. Two heating ends, located above and below the conveying device, ensure uniform heating of the brick blanks, allowing both the top and bottom surfaces to sinter simultaneously.
[0011] When the conveying device transports the brick blanks to the heating zone, the brick blanks are first heated by the electric heating device in the preheating section to evaporate the water vapor and other corrosive substances in the brick blanks. Then, they are heated by the electric heating device in the oxidation section to decompose the organic matter inside the brick blanks and react with the oxygen in the oxidation section. After the organic matter has been oxidized and decomposed, the fluxing raw materials inside the brick blanks begin to melt, causing the glaze on the surface of the brick blanks to melt. At this time, the electric heating device in the firing section keeps the brick blanks warm, allowing the molten raw materials to gradually fill the gaps in the aggregate.
[0012] The cooling zone includes a rapid cooling section and a slow cooling section. Two cooling devices are installed, one in the rapid cooling section and one in the slow cooling section, allowing for individual temperature control in each zone. This controls the shrinkage and deformation of the bricks during cooling, thereby controlling the flatness of the bricks and preventing cracks caused by excessively rapid or excessive cooling. Two cooling ends, located above and below the conveying device, ensure uniform cooling of the bricks.
[0013] Therefore, the brick blanks are fired using a fully electric heating system, eliminating the use of fossil fuels such as natural gas and oil. Apart from organic matter introduced during the clay preparation and slurry mixing processes, the firing process generates no carbon emissions, reducing environmental pollution and effectively achieving the low-carbon goals of ceramic production.
[0014] As a further improvement to the above technical solution, the three electric heating devices are two first heating elements and one second heating element. The two first heating elements are respectively located in the preheating section and the oxidation section. The first heating elements are covered with protective sleeves, and the second heating element is located in the firing section.
[0015] As a further improvement to the above technical solution, the cooling device includes a rapid cooling fan located in the rapid cooling section and multiple air blowing pipes. The multiple air blowing pipes are respectively located above and below the conveying device. All the air blowing pipes are connected in parallel to the rapid cooling fan. A first adjustment mechanism is provided between each air blowing pipe and the air outlet of the rapid cooling fan. The first adjustment mechanism is used to adjust the air volume entering the air blowing pipe.
[0016] As a further improvement to the above technical solution, the cooling device includes a heat extraction fan located in the slow cooling section and multiple heat exchange tubes. The multiple heat exchange tubes are respectively located above and below the conveying device. One end of the heat exchange tube extends horizontally through the outside of the kiln, and the other end of the heat exchange tube is connected to the heat extraction fan.
[0017] As a further improvement to the above technical solution, multiple heat exchange tubes located at the same height are connected in parallel, and a second regulating mechanism for adjusting the air volume is provided between the multiple heat exchange tubes connected in parallel and the heat extraction fan.
[0018] As a further improvement to the above technical solution, when multiple heat exchange tubes located above or below the conveying device are spaced apart vertically, multiple adjacent heat exchange tubes are staggered along the conveying direction of the brick blank, and the communication direction of two adjacent heat exchange tubes is opposite to that of the exhaust fan.
[0019] As a further improvement to the above technical solution, the fast-firing electric heating energy-saving roller kiln also includes an oxidation fan, a first heating device, and a second heating device. The air inlet of the oxidation fan is connected to the heat extraction fan, and the air outlet of the oxidation fan is split and connected to the first heating device and the second heating device. The first heating device is connected to the end of the oxidation section, and the second heating device is connected to the beginning of the slow cooling section.
[0020] As a further improvement to the above technical solution, the first heating device includes two first heating ends spaced vertically apart, and the conveying device is disposed between the two first heating ends. The two first heating ends are used to convey hot air and the direction of the hot air output is opposite to the conveying direction of the brick blank.
[0021] As a further improvement to the above technical solution, the second heating device includes two second heating ends spaced vertically apart, and the conveying device is disposed between the two second heating ends. The two second heating ends are used to convey hot air and the direction of the hot air output is the same as the conveying direction of the brick blank.
[0022] As a further improvement to the above technical solution, the preheating section is equipped with a smoke exhaust fan and multiple smoke exhaust pipes. The multiple smoke exhaust pipes are spaced apart along one end near the brick blank input direction, and the multiple smoke exhaust pipes are connected in parallel to the air inlet of the smoke exhaust fan. Attached Figure Description
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0024] Figure 1 This is a schematic diagram of the structure of the fast-firing electric heating energy-saving roller kiln provided in this embodiment of the utility model;
[0025] Figure 2 This is a schematic diagram of the preheating section provided in an embodiment of the present invention;
[0026] Figure 3 This is a schematic diagram of the structure of the oxidation section provided in an embodiment of this utility model;
[0027] Figure 4 This is a schematic diagram of the firing section provided in an embodiment of the present invention;
[0028] Figure 5 This is a schematic diagram of the structure of the rapid cooling section provided in this embodiment of the utility model;
[0029] Figure 6 This is a schematic diagram of the slow cooling section provided in an embodiment of the present invention;
[0030] Figure 7 This is a cross-sectional view of the exhaust pipe in the preheating section provided in this embodiment of the utility model;
[0031] Figure 8 This is a cross-sectional view of the first heating element in the preheating section provided in this embodiment of the utility model;
[0032] Figure 9 This is a cross-sectional view of the second heating element in the firing section provided in this embodiment of the utility model;
[0033] Figure 10 This is a cross-sectional view of the blower pipe in the rapid cooling section provided in this embodiment of the utility model;
[0034] Figure 11 This is a cross-sectional view of the heat exchange tube in the slow cooling section provided in this embodiment of the utility model.
[0035] The following labels are shown in the attached diagram:
[0036] 100. Kiln;
[0037] 200. Conveying device; 210. Brick blank;
[0038] 300. Heating zone; 310. Preheating section; 320. Oxidation section; 330. Firing section;
[0039] 400. Cooling zone; 410. Rapid cooling section; 420. Slow cooling section;
[0040] 500. Electric heating device; 510. First heating element; 520. Protective sleeve; 530. Second heating element;
[0041] 600, Cooling device; 610, Rapid cooling fan; 620, Air duct; 621, Air vent; 630, First regulating mechanism; 640, Heat extraction fan; 650, Heat exchange mechanism; 660, Heat exchange tube; 671, First main pipe; 672, Second main pipe; 680, Second regulating mechanism;
[0042] 700. Oxidation blower; 710. First heating device; 711. First heating end; 720. Second heating device; 721. Second heating end;
[0043] 800. Smoke exhaust fan; 810. Smoke exhaust pipe;
[0044] 900. Valves. Detailed Implementation
[0045] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0046] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0047] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.
[0048] It should be noted that in the attached diagram, the X direction points from the front to the rear of the fast-firing electric heating energy-saving roller kiln; the Y direction points from the left to the right of the fast-firing electric heating energy-saving roller kiln; and the Z direction points from the bottom to the top of the fast-firing electric heating energy-saving roller kiln.
[0049] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0050] In the current technology, conventional roller kilns use gas or oil as a heat source. The combustion of gas or oil produces gases such as carbon dioxide, nitrogen oxides, and sulfides, which cause environmental pollution.
[0051] Reference Figures 1 to 11 The following are several embodiments of the fast-firing electric heating energy-saving roller kiln of this utility model.
[0052] like Figures 1 to 11 As shown, the fast-firing electric heating energy-saving roller kiln of this utility model embodiment includes a kiln 100, which includes a conveying device 200, a heating zone 300 and a cooling zone 400.
[0053] It is understandable that the conveying device 200 conveys the brick blanks 210 along the long end of the kiln 100 so that the brick blanks 210 first pass through the heating zone 300 and then through the cooling zone 400, so that the brick blanks 210 complete the production process during the conveying process.
[0054] It is understood that the heating zone 300 includes a preheating section 310, an oxidation section 320, and a firing section 330 connected in sequence, such as Figure 1 As shown, the preheating section 310, oxidation section 320 and firing section 330 are connected along the conveying direction of the brick blank 210. The conveying device 200 is laid in the heating zone 300 so that the brick blank 210 is first conveyed to the preheating section 310, and then conveyed to the firing section 330 after passing through the oxidation section 320.
[0055] Understandably, the heating zone 300 is equipped with an electric heating device 500. Specifically, there are three electric heating devices 500, which are respectively located in the preheating section 310, the oxidation section 320, and the firing section 330. Each electric heating device 500 outputs two heating ends, which are respectively located above and below the conveying device 200, so that the two heating ends radiate heat to the brick blank 210 from the top and bottom directions, so that the temperature of the brick blank 210 gradually increases, thereby enabling the brick blank 210 to reach the optimal sintering state.
[0056] Understandably, when the brick blank 210 is conveyed to the preheating section 310, the brick blank 210 is heated by the electric heating device 500 and gradually discharges the free water and bound water in the blank.
[0057] Understandably, when the brick blank 210 is conveyed to the oxidation section 320, if the brick blank 210 reaches a certain temperature under the heating of the electric heating device 500, the organic matter inside the brick blank 210 begins to decompose and react with the oxygen in the oxidation section 320, thus completing the oxidative decomposition of the organic matter inside the brick blank 210. After the oxidative decomposition of the organic matter is completed, the fluxing raw materials inside the brick blank 210 begin to melt, and the glaze on the surface of the brick blank 210 also begins to melt.
[0058] Understandably, when the brick blank 210 is conveyed to the firing section 330, the electric heating device 500 keeps the brick blank 210 warm, so that the molten raw material gradually fills the aggregate cracks.
[0059] Understandably, the three electric heating devices 500 are independently set up to control the temperatures in the preheating section 310, oxidation section 320, and firing section 330, respectively. The three electric heating devices 500 can be precisely matched according to the formula of the brick blank 210. The conveying device 200 can be set in sections and precisely configured according to the formula of the brick blank 210, so that the forward speed of the brick blank 210 is matched to that of the preheating section 310, oxidation section 320, and firing section 330, respectively. The conveying device 200 and the three electric heating devices 500 work together to ensure that the brick blank 210 reaches the optimal sintering state.
[0060] It is understandable that the cooling zone 400 includes a rapid cooling section 410 and a slow cooling section 420 connected in sequence, such as Figure 1 As shown, the rapid cooling section 410 and the slow cooling section 420 are connected along the conveying direction of the brick blank 210. The conveying device 200 is also laid in the cooling zone 400, so that the brick blank 210 is first conveyed to the rapid cooling section 410 and then to the slow cooling section 420. The first end of the rapid cooling section 410 is connected to the end of the firing section 330, so that the conveying device 200 located in the rapid cooling section 410 receives the brick blank 210 located in the firing section 330 and cools the fired brick blank 210.
[0061] It is understandable that the cooling zone 400 is equipped with a cooling device 600. Specifically, there are two cooling devices 600, located respectively in the rapid cooling section 410 and the slow cooling section 420, such as... Figure 1 As shown. Each cooling device 600 outputs two cooling ends, which are respectively located above and below the conveying device 200, so that the two cooling ends cool the brick blank 210 from the top and bottom directions, so that the brick blank 210 cools down slowly.
[0062] In this embodiment, the conveying device 200 conveys the brick blanks 210 from front to back, that is, the heating zone 300 is located in front of the cooling zone 400. The conveying device 200 includes multiple rollers, which are spaced apart in the front-back direction. The rollers extend horizontally in the left-right direction and rotatably connect to the left and right walls of the kiln 100, so that the rollers can smoothly convey the brick blanks 210.
[0063] In some embodiments, the electric heating device 500 is a second heating element 530. By energizing the second heating element 530, the brick blank 210 can be heated, making the electric heating device 500 inexpensive. Figure 4 As shown. The second heating element 530 can be a silicon carbide rod.
[0064] In other embodiments, the electric heating device 500 is a first heating element 510, and a protective sleeve 520 is fitted over the first heating element 510 to protect it. Figure 8As shown, this is to prevent the first heating element 510 from being damaged by water vapor and other corrosive volatiles emitted by the brick blank 210 during the heating process.
[0065] Understandably, the first heating element 510 can be a metal heating wire, which heats the brick blank 210 by energizing the metal heating wire. The protective sleeve 520 can be a quartz tube.
[0066] It is understandable that the three electric heating devices 500 can be two first heating elements 510 and one second heating element 530, respectively. Specifically, since the brick blanks 210 in the preheating section 310 volatilize water vapor, and the organic matter in the brick blanks 210 in the oxidation section 320 undergoes oxidative decomposition, the preheating section 310 and the oxidation section 320 are each equipped with a first heating element 510 fitted with a protective sleeve 520. Since the brick blanks 210 in the firing section 330 are used to fill the aggregate cracks with molten raw materials, the firing section 330 is equipped with a second heating element 530, such as... Figure 4 and Figure 9 As shown.
[0067] In this way, different electric heating devices 500 can be set according to different firing processes of the brick blank 210 in the heating zone 300, the protective sleeve 520 protects the first heating element 510 and extends the service life of the first heating element 510, and saves the setting cost of the electric heating device 500.
[0068] Furthermore, since the volatilization, oxidation, decomposition, and melting of the brick blank 210 to fill the aggregate cracks need to be carried out under different temperature conditions, the first heating element 510 and the second heating element 530 can be laid according to the temperature of the heating zone 300. Specifically, with 900 degrees Celsius as the dividing line, the first heating element 510 is used for the part of the heating zone 300 before 900 degrees Celsius, and the second heating element 530 is used for the part of the heating zone 300 after 900 degrees Celsius. By using the different heating properties of the first heating element 510 and the second heating element 530 to heat the brick blank 210, the brick blank 210 can be subjected to corresponding production operations at different temperatures.
[0069] Understandably, the cooling device 600 of the quench section 410 includes a quench fan 610 and multiple air ducts 620, such as... Figure 5 As shown. Specifically, the quenching fan 610 is located outside the kiln 100, and its outlet is connected in parallel to multiple air blowing pipes 620 to divert air from outside the kiln 100 into these pipes. The cooling end of the cooling device 600 is the air blowing pipe 620; therefore, the multiple air blowing pipes 620 are respectively located above and below the conveying device 200, as shown. Figure 5 and Figure 10As shown. Multiple air blowing pipes 620 at the same height are spaced apart along the conveying direction of the brick blank 210. Both ends of the air blowing pipes 620 extend laterally and beyond the kiln 100. The left and right ends of the air blowing pipes 620 are connected to the air outlet of the quenching fan 610, allowing the cold air outside the kiln 100 to flow evenly towards the air blowing pipes 620. Multiple air blowing holes 621 are provided on the side of the air blowing pipes 620 facing the conveying device 200. These holes are spaced apart axially along the air blowing pipes 620. Figure 10 As shown.
[0070] Thus, when the brick blank 210 passes through the rapid cooling section 410, the cold air from the rapid cooling fan 610 to the outside of the kiln 100 is blown onto the brick blank 210 through the air blowing pipe 620, causing the brick blank 210 to cool down rapidly.
[0071] It is understandable that in the parallel pipeline of the air duct 620 and the quench fan 610, each air duct 620 corresponds to a first adjusting mechanism 630. The first adjusting mechanism 630 is used to adjust the air volume of the quench fan 610 entering the air duct 620, such as... Figure 5 As shown. Therefore, the first adjustment mechanism 630 can individually adjust the air volume blown by the corresponding air pipe 620 onto the brick blank 210.
[0072] It is understandable that, since air pipes 620 are provided above and below the conveying device 200, the cooling rate of the upper surface and the cooling rate of the lower surface of the brick blank 210 can be adjusted by the first adjustment mechanism 630 corresponding to the upper air pipe 620 and the first adjustment mechanism 630 corresponding to the lower air pipe 620, respectively, thereby controlling the cooling shrinkage deformation of the brick blank 210 and thus controlling the flatness of the brick blank 210.
[0073] It is understandable that since multiple air ducts 620 located at the same height and laid in the front-to-back direction each correspond to a first adjustment mechanism 630, the multiple air ducts 620 can be set with different air volumes along the conveying direction of the brick blank 210 through multiple first adjustment mechanisms 630 to meet different production needs. For example, for brick blanks 210 that are prone to deformation and breakage due to large temperature differences, the temperature difference between the end of the firing section 330 and the beginning of the quenching section 410 can be reduced.
[0074] It is understandable that each air duct 620 corresponds to one or two first adjusting mechanisms 630. Taking one of the upper air ducts 620 as an example, the air duct 620 extends upward from the left and right ends of the kiln 100 and connects above the quench section 410, and then connects in parallel to the quench blower 610. When there is one first adjusting mechanism 630, the first adjusting mechanism 630 is located on the upward-extending section of the air duct 620 at the left or right end. When there are two first adjusting mechanisms 630, the two first adjusting mechanisms 630 are respectively located on the upward-extending sections of the air duct 620 at the left and right ends.
[0075] It is understandable that the first regulating mechanism 630 is a regulating valve.
[0076] Understandably, the cooling device 600 of the slow cooling section 420 includes a hot air blower 640 and multiple heat exchange tubes 660, such as... Figure 6 As shown. Specifically, the hot air blower 640 is located outside the kiln 100. The cooling end of the cooling device 600 is a heat exchange tube 660; therefore, multiple heat exchange tubes 660 are respectively located above and below the conveying device 200, as shown. Figure 11 As shown. Multiple heat exchange tubes 660 located at the same height are spaced apart along the conveying direction of the brick blank 210. The heat exchange tubes 660 extend horizontally in the left and right direction. One end of the heat exchange tubes penetrates the wall of the kiln 100, allowing cold air from outside the kiln 100 to enter the heat exchange tubes 660. The other end is connected to the air inlet of the exhaust fan 640. The heat exchange tubes 660 are not connected to the interior of the slow cooling section 420.
[0077] Thus, when the brick blank 210 passes through the slow cooling section 420, the exhaust fan 640 draws cold air from outside the kiln into the heat exchange tube 660 through negative pressure. The heat of the brick blank 210 radiates onto the heat exchange tube 660 and indirectly exchanges heat with the cold air inside the heat exchange tube 660 through the tube wall. At the same time, the exhaust fan 640 continuously extracts the hot air from the heat exchange tube 660, thereby achieving the purpose of slowly cooling the brick blank 210.
[0078] Understandably, multiple heat exchange tubes 660 at the same height are connected in parallel. A second regulating mechanism 680 is provided between the multiple heat exchange tubes 660 connected in parallel and the exhaust fan 640. The second regulating mechanism 680 is used to regulate the air volume entering the heat exchange tubes 660, thereby achieving the cooling temperature of the brick blank 210. Figure 6 As shown.
[0079] It is understandable that the cooling device 600 of the slow cooling section 420 also includes a vertically connected first main pipe 671 and second main pipe 672, such as... Figure 6 and Figure 11As shown, the first main pipe 671 extends along the conveying direction of the brick blank 210 and connects multiple heat exchange tubes 660 located at the same height, realizing the parallel connection of multiple heat exchange tubes 660. The upper and lower ends of the second main pipe 672 are connected to the air inlet of the exhaust fan 640 and the first main pipe 671, respectively, so that multiple heat exchange tubes 660 can be connected to the exhaust fan 640, and the connecting pipes are simpler.
[0080] It is understandable that the second regulating mechanism 680 is located on the second main pipe 672, such as Figure 6 As shown, the airflow of multiple heat exchange tubes 660 can be adjusted through a single second adjustment mechanism 680, reducing the number of second adjustment mechanisms 680 required, lowering costs, and simplifying the structure of the slow cooling section 420.
[0081] It is understandable that the cooling device 600 of the slow cooling section 420 includes multiple heat exchange mechanisms 650, such as... Figure 6 As shown, the heat exchange mechanism 650 includes a first main pipe 671, a second main pipe 672, and multiple heat exchange tubes 660 connected to the first main pipe 671. Each heat exchange mechanism 650 is equipped with a second adjustment mechanism 680, which enables each heat exchange mechanism 650 to independently adjust the airflow of the corresponding heat exchange tube 660, thereby achieving a stable and adjustable cooling rate of the brick blank 210 in different areas, preventing the brick blank 210 from cooling too quickly or too slowly, which could cause cracks in the brick blank 210.
[0082] In some embodiments, multiple heat exchange mechanisms 650 are arranged at intervals in the vertical direction, that is, all heat exchange tubes 660 at the same height are connected to a first main pipe 671. A second adjustment mechanism 680 can realize the air volume of all heat exchange tubes 660 at the same height, making the structure of the slow cooling section 420 simple. Each second adjustment mechanism 680 adjusts the cooling rate at different heights in the slow cooling section 420.
[0083] In other embodiments, multiple heat exchange mechanisms 650 are provided at the same height in the slow cooling section 420, and the multiple heat exchange mechanisms 650 are spaced apart along the conveying direction of the brick blank 210. Therefore, the multiple second adjustment mechanisms 680 can respectively adjust the cooling rate of the brick blank 210 at different forward and backward conveying positions.
[0084] Correspondingly, multiple heat exchange mechanisms 650 located at the same height are connected in parallel, that is, multiple second main pipes 672 located at the same height merge and are connected to the air inlet of the heat extraction fan 640.
[0085] It is understandable that the second regulating mechanism 680 is a regulating valve.
[0086] Furthermore, multiple heat exchange tubes 660 spaced vertically may be provided above or below the conveying device 200, such as... Figure 6As shown, multiple heat exchange tubes 660 adjacent to each other are staggered along the conveying direction of the brick blank 210, so that more heat exchange tubes 660 can be laid above or below the brick blank 210, thereby improving the heat exchange efficiency between the brick blank 210 and the heat exchange tubes 660 and thus improving the cooling effect of the brick blank 210.
[0087] It is understandable that when multiple heat exchange tubes 660 spaced vertically are provided above or below the conveying device 200, the connection direction of two adjacent heat exchange tubes 660 is opposite to that of the exhaust fan 640. Specifically, since the first main pipe 671 connects to multiple heat exchange tubes 660, the connection direction of multiple heat exchange tubes 660 in one heat exchange mechanism 650 is the same as that of the exhaust fan 640. That is, in two adjacent heat exchange mechanisms 650 above or below the conveying device 200, the first main pipe 671 and the second main pipe 672 of one heat exchange mechanism 650 are located at the left end of the kiln 100, and the first main pipe 671 and the second main pipe 672 of the other heat exchange mechanism 650 are located at the right end of the kiln 100, thereby making the cooling effect of the brick blank 210 more uniform. Figure 11 As shown.
[0088] In some embodiments, the communication directions of multiple heat exchange mechanisms 650 at the same height and the exhaust fan 640 are staggered, so that the cooling effect of the brick blank 210 is more uniform.
[0089] In other embodiments, multiple heat exchange mechanisms 650 at the same height are connected in the same direction as the heat extraction fan 640, which simplifies the structure of the slow cooling section 420.
[0090] In this embodiment, within the slow cooling section 420, the multiple heat exchange mechanisms 650 located above the conveying device 200 are spaced two layers apart vertically, and the multiple heat exchange mechanisms 650 located below the conveying device 200 are also spaced two layers apart vertically. The two vertically opposite heat exchange mechanisms 650 convey air in opposite directions, and the two horizontally adjacent heat exchange mechanisms 650 convey air in opposite directions, so that the brick blank 210 is cooled more evenly within the slow cooling section 420.
[0091] It is understandable that the kiln 100 also includes an oxidation fan 700, a first heating device 710, and a second heating device 720, such as... Figure 1 As shown. Specifically, the air inlet of the oxidation blower 700 is connected to the air outlet of the heat extraction blower 640 to introduce hot air after heat exchange with the brick blanks 210 in the slow cooling section 420 into the oxidation blower 700. The air inlet of the oxidation blower 700 is also connected to the outside of the kiln 100 to introduce air from outside the kiln 100 when hot air is insufficient or unavailable. A valve 900 is provided between the oxidation blower 700 and the outside of the kiln 100 to control the inflow rate of outside air, such as... Figure 6As shown. The outlet of the oxidation blower 700 is split and connected to the end of the oxidation section 320 and the beginning of the slow cooling section 420 respectively. A first heating device 710 is provided between the oxidation blower 700 and the end of the oxidation section 320, as shown. Figure 3 As shown; a second heating device 720 is provided between the oxidation blower 700 and the beginning of the slow cooling section 420, such as Figure 6 As shown.
[0092] Understandably, both the first heating device 710 and the second heating device 720 are used to heat the air introduced by the oxidation blower 700. Specifically, when the kiln 100 is firing brick blanks 210 at a low temperature and in large quantities, the first heating device 710 blows a large amount of hot air at about 1000 degrees Celsius into the end of the oxidation section 320. At this time, in the oxidation section 320, a large amount of oxygen-containing hot air reacts with the organic matter in the brick blanks 210, causing the brick blanks 210 to be rapidly and completely oxidized. When the kiln 100 is occasionally empty for a long time, the second heating device 720 blows a large amount of hot air at about 600 degrees Celsius into the beginning of the slow cooling section 420 to maintain the furnace temperature in the slow cooling section 420. Since the rapid cooling section 410 and the slow cooling section 420 are connected, when the conveying device 200 is not conveying brick blanks 210, the rapid cooling air output by the blower 620 is reduced. At this time, the hot air delivered by the oxidation blower 700 and the second heating device 720 can maintain the positive pressure in the furnace in the slow cooling section 420, thereby preventing the brick blanks 210 from cracking when the conveying device 200 conveys the brick blanks 210.
[0093] In this way, the fast-firing electric heating energy-saving roller kiln can achieve rapid and large-volume brick firing. Bricks fired by pure electricity with zero carbon emissions can also achieve the same output and quality as conventional petrochemical fuel kilns.
[0094] In this embodiment, the first heating device 710 and the second heating device 720 are high-frequency electromagnetic hot air furnaces.
[0095] It is understandable that the oxidation blower 700 is equipped with a valve 900 before the flow diversion, such as... Figure 6 As shown, it is used to adjust the total hot air flow rate. After the flow is split, the oxidation blower 700 is provided with a valve 900 between itself and the first heating device 710 and the second heating device 720, to adjust the flow rate of hot air entering the oxidation section 320 and the slow cooling section 420.
[0096] It is understood that the first heating device 710 includes two first heating ends 711 located at the end of the oxidation section 320. The two first heating ends 711 are spaced apart in the vertical direction and are respectively located above and below the conveying device 200, so that the air heated by the first heating device 710 is evenly conveyed to the top and bottom of the conveying device 200, allowing the brick blank 210 to undergo an overall oxidation reaction, such as... Figure 3 As shown.
[0097] In this embodiment, the direction of hot air delivery from the two first heating ends 711 is opposite to the direction of brick blank delivery from the conveying device 200, such as... Figure 3 As shown, the hot air output from the first heating device 710 promotes the oxidation reaction of the brick blank 210 in the oxidation section 320, and then flows to the preheating section 310. The brick blank 210 in the preheating section 310 moves forward at a fast speed, and the large amount of hot air delivered by the first heating device 710 acts as a drainage medium to accelerate the discharge of moisture.
[0098] It is understandable that the second heating device 720 includes two second heating ends 721 located at the beginning of the slow cooling section 420, such as... Figure 6 As shown, two second heating ends 721 are spaced apart in the vertical direction and are respectively located above and below the conveying device 200, so that the air heated by the second heating device 720 is evenly conveyed to the top and bottom of the conveying device 200, so as to quickly and evenly maintain the furnace temperature in the slow cooling section 420.
[0099] In this embodiment, since the second heating end 721 is located at the beginning of the slow cooling section 420, the direction in which the second heating end 721 delivers hot air is the same as the direction in which the conveying device 200 conveys the brick blank 210, such as... Figure 6 As shown, the hot air output from the second heating device 720 flows from front to back along the entire slow cooling section 420, thereby effectively maintaining the furnace temperature of the entire slow cooling section 420.
[0100] Understandably, since the brick blank 210 releases moisture and decomposes to produce waste gas during heating in the preheating section 310, the preheating section 310 is equipped with an exhaust fan 800 and multiple exhaust pipes 810, such as... Figure 2 As shown. Specifically, the exhaust fan 800 is located outside the preheating section 310. The air inlet of the exhaust fan 800 is connected to multiple exhaust pipes 810. The exhaust pipes 810 are located at the end near the input direction of the brick blank 210 to prevent the exhaust pipes 810 from drawing away the hot air flowing from the oxidation section 320 to the end of the preheating section 310.
[0101] Understandably, multiple exhaust pipes 810 are spaced apart along the conveying direction of the brick blank 210 to ensure uniform exhaust at the beginning of the preheating section 310. The multiple exhaust pipes 810 are connected in parallel and then connected to the air inlet of the exhaust fan 800, simplifying the connection between the two.
[0102] Understandably, each exhaust pipe 810 is equipped with a valve 900 for adjusting the exhaust flow rate, such as... Figure 2 As shown.
[0103] Understandably, multiple exhaust pipes 810 are symmetrically arranged in pairs on the left and right walls of the kiln 100. Specifically, the exhaust pipes 810 are L-shaped pipes, such as... Figure 7 As shown, one end of the flue pipe 810 extends in the left and right direction and connects to the furnace of the preheating section 310, while the other end of the flue pipe 810 extends upward and connects to the flue fan 800. This allows the flue gas at the top of the preheating section 310 to be drawn into the flue pipes 810 at the upper left and upper right ends of the kiln 100, and then output from the kiln 100 along the flue fan 800.
[0104] In this embodiment, the exhaust pipe 810 has six pipes arranged in pairs, symmetrically arranged on both sides, and arranged in three groups at intervals along the conveying direction of the brick blank 210.
[0105] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A fast-firing, electrically heated, energy-saving roller kiln, characterized in that, Includes a kiln, wherein the kiln is equipped with: A conveying device for conveying brick blanks; The heating zone includes a preheating section, an oxidation section, and a firing section connected sequentially along the brick conveying direction. Each of the preheating section, the oxidation section, and the firing section is equipped with an electric heating device, and the heating end of each electric heating device is respectively located above and below the conveying device. The cooling zone includes a rapid cooling section and a slow cooling section connected sequentially along the brick conveying direction. The first end of the rapid cooling section is connected to the end of the firing section. The rapid cooling section and the slow cooling section are respectively equipped with cooling devices. The cooling end of each cooling device is located above and below the conveying device.
2. The fast-firing, electrically heated, energy-saving roller kiln according to claim 1, characterized in that, The three electric heating devices are two first heating elements and one second heating element. The two first heating elements are respectively located in the preheating section and the oxidation section. The first heating elements are covered with protective sleeves, and the second heating element is located in the firing section.
3. The fast-firing, electrically heated, energy-saving roller kiln according to claim 1, characterized in that, The cooling device includes a quenching fan located in the quenching section and multiple air blowing pipes. The multiple air blowing pipes are respectively located above and below the conveying device. All the air blowing pipes are connected in parallel to the quenching fan. A first adjustment mechanism is provided between each air blowing pipe and the air outlet of the quenching fan. The first adjustment mechanism is used to adjust the air volume entering the air blowing pipe.
4. The fast-firing, electrically heated, energy-saving roller kiln according to claim 1, characterized in that, The cooling device includes a heat extraction fan located in the slow cooling section and multiple heat exchange tubes. The multiple heat exchange tubes are respectively located above and below the conveying device. One end of each heat exchange tube extends horizontally through the outside of the kiln, and the other end of each heat exchange tube is connected to the heat extraction fan.
5. The fast-firing, electrically heated, energy-saving roller kiln according to claim 4, characterized in that, Multiple heat exchange tubes located at the same height are connected in parallel, and a second regulating mechanism for adjusting the air volume is provided between the multiple heat exchange tubes connected in parallel and the exhaust fan.
6. The fast-firing, electrically heated, energy-saving roller kiln according to claim 5, characterized in that, When multiple heat exchange tubes located above or below the conveying device are spaced apart vertically, multiple adjacent heat exchange tubes are staggered along the conveying direction of the brick blank, and the communication direction of two adjacent heat exchange tubes is opposite to that of the exhaust fan.
7. The fast-firing, electrically heated, energy-saving roller kiln according to claim 4, characterized in that, It also includes an oxidation fan, a first heating device, and a second heating device. The air inlet of the oxidation fan is connected to the heat extraction fan, and the air outlet of the oxidation fan is connected to the first heating device and the second heating device. The first heating device is connected to the end of the oxidation section, and the second heating device is connected to the beginning of the slow cooling section.
8. The fast-firing, electrically heated, energy-saving roller kiln according to claim 7, characterized in that, The first heating device includes two first heating ends spaced vertically apart. The conveying device is located between the two first heating ends. The two first heating ends are used to convey hot air and the direction of the hot air output is opposite to the conveying direction of the brick blank.
9. The fast-firing, electrically heated, energy-saving roller kiln according to claim 7, characterized in that, The second heating device includes two second heating ends spaced vertically apart. The conveying device is located between the two second heating ends. The two second heating ends are used to convey hot air and the direction of the hot air output is the same as the conveying direction of the brick blank.
10. The fast-firing, electrically heated, energy-saving roller kiln according to claim 1, characterized in that, The preheating section is equipped with a smoke exhaust fan and multiple smoke exhaust pipes. The multiple smoke exhaust pipes are spaced apart along one end near the brick blank input direction, and the multiple smoke exhaust pipes are connected in parallel to the air inlet of the smoke exhaust fan.