A honeycomb ceramic regenerator and a regenerative furnace

Abstract

The present invention relates to a honeycomb ceramic regenerator and a regenerative furnace, including a body in the shape of a regular quadrangular prism. The body is provided with straight-through honeycomb channels arranged in a parallel array, and the straight-through honeycomb channels extend along the length direction of the body and penetrate through the two end faces of the body. Two mutually orthogonal grooves are formed on one end face of the body, and the grooves penetrate through the two side faces of the body. The width W of the grooves on the end face of the body and the side length A of the body satisfy: W = A*X, where 0.4 ≤ X ≤ 0.8; the depth H of the grooves and the length L of the body satisfy: H = L*Y, where 0.15 ≤ Y ≤ 0.3. The present invention can achieve the homogenization of the pressure, temperature, flow rate, etc. inside the honeycomb ceramic regenerator, which is beneficial to extending the service life of the honeycomb ceramic regenerator and improving the heat storage efficiency of the heat storage chamber.

Description

Technical Field

[0001] The present invention relates to a honeycomb ceramic regenerator and a regenerative furnace, belonging to the field of environmental protection equipment. Background Art

[0002] In the contemporary industrial development, the demand for thermal energy in various industries is gradually increasing, and industrial furnaces are playing an increasingly important role. During their operation, heating processes such as smelting, drying, baking, and chemical reactions are involved. The combustion efficiency of various fuels based on combustion is limited, including mechanical incomplete combustion and chemical incomplete combustion, resulting in a large amount of flue gas and flames. In order to improve the combustion problem, it is necessary to strengthen heat insulation, reduce the heat carried away by flue gas, and increase the inlet temperature of flue gas and fuel. The regenerative high-temperature air combustion technology preheats the combustion-supporting air from room temperature to 800 °C through efficient regenerative materials, greatly reducing the emissions of (nitrogen oxides), controlling the exhaust gas temperature within the range above the dew point and below 150 °C, maximizing the recovery of flue gas waste heat, and making the combustion temperature in the furnace more uniform. This technology has been widely applied in various industrial furnaces, making important contributions to reducing energy consumption and pollutant emissions.

[0003] As the core component in the regenerative combustion technology, the ceramic regenerator has the advantages of high specific heat capacity, high thermal conductivity, and high service temperature. However, in the regenerator chamber, according to the simulation of computational fluid dynamics, the actual pressure distribution in the regenerator is very uneven. The honeycomb ceramic regenerator works under the service conditions of alternating high- and low-temperature flue gases flowing through it, which is a process of frequent high- and low-temperature switching. Therefore, on the one hand, such unevenness leads to an uneven temperature field distribution inside the honeycomb ceramic, generating large thermal stresses and shortening its service life; on the other hand, due to the uneven pressure and flow rate, the heat storage efficiency of the honeycomb ceramic is affected.

[0004] In order to solve the current situation of uneven flow velocity distribution in the existing regenerative combustion chamber, it is necessary to optimize the honeycomb ceramic to achieve the uniformity of internal pressure and velocity. The Chinese Utility Model Patent Specification CN211205004U discloses a special-shaped honeycomb ceramic regenerator with uniform air flow distribution. An exhaust gas distribution bed is arranged between the lowest layer of the regenerator bed in the regenerative furnace and the exhaust gas passage. The exhaust gas distribution bed is composed of a special-shaped honeycomb ceramic regenerator. The inner cavity of the special-shaped honeycomb ceramic regenerator has straight-through honeycomb holes arranged parallel or staggered with each other. Diversion holes that communicate with each other are arranged on the end face of the special-shaped honeycomb ceramic regenerator without honeycomb holes. This special-shaped honeycomb ceramic regenerator can achieve pressure equalization to a certain extent, but its diversion holes are arranged in the middle section of the ceramic regenerator, with high processing difficulty, and its diversion holes are preferably circular, further increasing the processing difficulty, resulting in a great impact on the finished product rate of this solution. Therefore, it is necessary to design a honeycomb ceramic regenerator that is simple and easy to process and has a good pressure equalization effect. Summary of the Invention

[0005] In view of the deficiencies of the prior art, one of the objectives of the present invention is to provide a honeycomb ceramic regenerator with more excellent pressure equalization effect; another objective of the present invention is to provide a regenerative furnace.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A honeycomb ceramic regenerator, comprising a body in the shape of a regular quadrangular prism, and straight-through honeycomb channels arranged in a parallel array are provided in the body. The straight-through honeycomb channels extend along the length direction of the body and penetrate through both end faces of the body; two mutually orthogonal grooves are formed on one end face of the body, and the grooves penetrate through both side faces of the body. The width W of the grooves on the end face of the body and the side length A of the body satisfy: W = A*X, where 0.4 ≤ X ≤ 0.8; the depth H of the grooves and the length L of the body satisfy: H = L*Y, where 0.15 ≤ Y ≤ 0.3; during use, the end faces of every two bodies with grooves are butted, so that the grooves on the two bodies are symmetrically distributed. At this time, every two opposite grooves form a pressure equalization channel, and two pressure equalization channels are orthogonal to form a pressure equalization chamber. Among them, the cross-section of the pressure equalization chamber is in a polygonal shape.

[0008] As described above, generally, the honeycomb ceramic regenerator of the present invention is used in pairs during use, and by installing them oppositely, the grooves are configured to form a pressure equalization chamber.

[0009] Further, 0.5 ≤ X ≤ 0.7, preferably, 0.55 ≤ X ≤ 0.65.

[0010] Further, 0.15 ≤ Y ≤ 0.3, preferably, 0.2 ≤ Y ≤ 0.25.

[0011] Further, the polygon is an n-sided polygon, n is an integer, and the value of n is 4 - 10, preferably 6 - 8; preferably, the cross-section of the pressure equalization chamber is in a regular polygonal shape.

[0012] Further, the grooves extend along the side length direction of the body.

[0013] Further, the central axis of the pressure equalization channel is located on the end face of the body and passes through the central axis of the body.

[0014] Further, the volume of the grooves is 10 - 25% of the volume of the body, preferably 15 - 20%.

[0015] Further, the number of straight-through honeycomb channels in the body is 13*13 - 60*60.

[0016] Further, the raw materials of the honeycomb ceramic regenerator include basic powder, dispersant and grinding aid; by weight, the basic powder includes 40-60 parts of bauxite powder, 2-6 parts of cordierite powder, 1-4 parts of Suzhou kaolin, 0.5-1.5 parts of pyrophyllite powder, 20-35 parts of mullite powder, 2-4 parts of potassium feldspar and 2-3 parts of raw talc. The addition amount of the dispersant is 2-5‰ of the total mass of the basic powder, and the addition amount of the grinding aid is 0.5-2‰ of the total mass of the basic powder.

[0017] Further, the raw materials of the honeycomb ceramic regenerator include basic powder, dispersant and grinding aid; by weight, the basic powder includes 45-55 parts of bauxite powder, 3-5 parts of cordierite powder, 2-3 parts of Suzhou kaolin, 0.75-1.25 parts of pyrophyllite powder, 25-30 parts of mullite powder, 2.5-3.5 parts of potassium feldspar and 2.2-2.8 parts of raw talc. The addition amount of the dispersant is 3-4‰ of the total mass of the basic powder, and the addition amount of the grinding aid is 1-1.5‰ of the total mass of the basic powder.

[0018] Preferably, the Al 2 O 3 aluminum oxide content in the bauxite powder > 80 wt%, more preferably 85-95 wt%; preferably, the dispersant is industrial white oil.

[0019] Based on the same inventive concept, the present invention also provides a regenerative furnace, which includes an exhaust gas passage, a regenerative bed and a combustion chamber that are connected in sequence. The regenerative bed is composed of a plurality of honeycomb ceramic regenerators as described above.

[0020] Generally, the preparation method of the honeycomb ceramic regenerator of the present invention is basically the same as that of the conventional honeycomb ceramic regenerator.

[0021] Optionally, the preparation method of the honeycomb ceramic regenerator includes a raw material preparation process, a forming process and a firing process. Among them, after the ceramic green body is dried in the forming process, grooves are opened on the end surface of the ceramic green body.

[0022] Aiming at the problems of uneven distribution of velocity and pressure on the honeycomb ceramic regenerator in the existing honeycomb ceramic regenerator chamber, which leads to heat stress concentration and limited heat storage efficiency of the honeycomb ceramic regenerator, etc., the present invention provides a grooved honeycomb ceramic regenerator. By docking two honeycomb ceramic regenerators to construct a pressure equalizing chamber that meets the requirements, the uniformization of the inlet wind pressure and velocity during the heat storage combustion process is realized, so that as much as possible the honeycomb ceramic regenerators in the entire regenerator chamber work under the same conditions, achieving the purpose of improving the heat storage performance of the honeycomb ceramic regenerator and the service life of the honeycomb ceramic regenerator.

[0023] By using the honeycomb ceramic regenerator of the present invention, it is possible to equalize the uneven wind pressure entering the regenerator chamber during the regenerative combustion process, equalize the inlet wind pressure and velocity during the regenerative combustion process, and ensure that the honeycomb ceramic regenerators throughout the regenerator chamber work under the same conditions as much as possible, so as to fully utilize the heat storage performance of the honeycomb ceramic and extend the service life of the honeycomb ceramic regenerator. Moreover, the production process of the honeycomb ceramic regenerator of the present invention is simple, the yield is high, and no additional cost is required.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) When the honeycomb ceramic regenerator of the present invention is in service, it can achieve a uniform distribution of internal pressure and flow velocity, which is beneficial to the full play of the heat storage performance of the honeycomb ceramic regenerator.

[0026] (2) When the honeycomb ceramic regenerator of the present invention is in service, it can achieve a uniform distribution of internal pressure and flow velocity, which helps to make the internal temperature distribution of the regenerator more uniform, relieve the thermal stress distribution in the regenerator, and extend the service life of the honeycomb ceramic regenerator.

[0027] (3) The grooves of the honeycomb ceramic regenerator of the present invention are opened at the end, the processing method is simple, the cost of the ceramic will not increase, and the yield rate in the processing and firing processes is basically the same as that of ordinary ceramics.

[0028] In summary, through the innovation of the structure of the honeycomb ceramic regenerator and the in-depth research and improvement of relevant parameters, the present invention can achieve the equalization of pressure, temperature, flow velocity, etc. inside the honeycomb ceramic regenerator, which is beneficial to extending the service life of the honeycomb ceramic regenerator and improving the heat storage efficiency of the regenerator chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the stacking model of a honeycomb ceramic regenerator of the invention.

[0030] Figure 2a For Figure 1 the graph of the average mass flow rate at the outlet of the 1-4# honeycomb ceramic regenerator in

[0031] Figure 2b For Figure 1 the graph of the average mass flow rate at the outlet of the 5# honeycomb ceramic regenerator in

[0032] Figure 3a For Figure 1 the graph of the average outlet velocity of the honeycomb ceramic regenerator in

[0033] Figure 3b For Figure 1Figure of the average turbulent kinetic energy at the outlet of the honeycomb ceramic regenerator, where the horizontal axis is H (mm).

[0034] Figure 4a Schematic diagram of the stacking model of the honeycomb ceramic regenerator of Comparative Example 1.

[0035] Figure 4b Schematic diagram of the stacking model of the honeycomb ceramic regenerator of Example 2.

[0036] Figure 4c Schematic diagram of the stacking model of the honeycomb ceramic regenerator of Example 3.

[0037] Figure 5 Schematic cross-sectional structure diagram of a honeycomb ceramic regenerator of the present invention.

[0038] Figure 6 Schematic cross-sectional structure diagram of a honeycomb ceramic regenerator of the present invention in the operating state.

[0039] Figure 7 Stereogram of the honeycomb ceramic regenerator of Example 11.

[0040] Figure 8a Schematic diagram of the stacking model constructed by a common honeycomb ceramic regenerator.

[0041] Figure 8b Schematic diagram of the stacking model constructed by the honeycomb ceramic regenerator of Example 11.

[0042] Figure 9a Schematic diagram of the pressure field of the stacking model constructed by a common honeycomb ceramic regenerator.

[0043] Figure 9b Schematic diagram of the pressure field of the stacking model constructed by the honeycomb ceramic regenerator of Example 11.

[0044] Figure 10a Schematic diagram of the flow field of the stacking model constructed by a common honeycomb ceramic regenerator.

[0045] Figure 10b Schematic diagram of the flow field of the stacking model constructed by the honeycomb ceramic regenerator of Example 11.

[0046] Figure 11 Schematic cross-sectional structure diagram of the honeycomb ceramic regenerator of Example 12.

[0047] Figure 12 Schematic three-dimensional structure diagram of the honeycomb ceramic regenerator of Example 12.

[0048] Figure 13 Schematic cross-sectional structure diagram of the honeycomb ceramic regenerator of Example 13.

[0049] Figure 14 Schematic diagram of the three-dimensional structure of the honeycomb ceramic regenerator of Example 13. Detailed implementation manners

[0050] The present invention will be described in detail below with reference to the embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0051] Example 1

[0052] A honeycomb ceramic regenerator includes a body 1 in the shape of a regular quadrangular prism. Straight-through honeycomb channels 2 are arranged in a parallel array in the body 1. The straight-through honeycomb channels 2 extend along the length direction of the body 1 and penetrate through the two end faces of the body 1. Two mutually orthogonal grooves 2 are formed on one end face of the body 1. The grooves 2 penetrate through the two side faces of the body 1. The width W of the grooves 2 on the end face of the body 1 and the side length A of the body 1 satisfy: W = A*X = 150 mm*X. The depth H of the grooves 2 and the length L of the body 1 satisfy: H = L*Y = 200 mm*Y. See Table 1 for details. During use, the end faces of every two bodies 1 with grooves 2 are butted against each other, so that the grooves 2 on the two bodies 1 are symmetrically distributed. At this time, every two opposite grooves 2 form a pressure equalizing channel, and two pressure equalizing channels are orthogonal to form a pressure equalizing chamber. Among them, the cross-section of the pressure equalizing channel is rectangular.

[0053] The grooves 2 extend along the side length direction of the body 1. The central axis of the pressure equalizing channel is located on the end face of the body 1 and passes through the central axis of the body 1.

[0054] The number of straight-through honeycomb channels 2 in the body 1 is 25*25.

[0055] The raw materials of the honeycomb ceramic regenerator include a base powder, a dispersant, and a grinding aid. By weight, the base powder includes 45 parts of bauxite powder, 3 parts of cordierite powder, 4 parts of Suzhou kaolin, 0.5 part of pyrophyllite powder, 23 parts of mullite powder, 2 parts of potassium feldspar, and 2 parts of raw talc. The addition amount of the dispersant is 5‰ of the total mass of the base powder, and the addition amount of the grinding aid is 1.5‰ of the total mass of the base powder. The Al 2 O 3 aluminum oxide content in the bauxite powder > 80 wt%, and the dispersant is industrial white oil.

[0056] Only change H and W, and build honeycomb ceramic models with pressure equalizing chambers of different volumes respectively. The built geometric models are as Figure 1As shown in the figure, the model is composed of two stacked layers of honeycomb ceramic regenerators, and each layer consists of five honeycomb ceramic regenerators closely stacked. To show the influence of the grooved structure on the internal pressure and flow rate of the honeycomb ceramic regenerator, different inlet velocities are set for the honeycomb ceramic regenerators at different positions. Specifically, the inlet velocity of the honeycomb ceramic regenerator 5# in the middle is set to 2 m / s, and the inlet velocities of the honeycomb ceramic regenerators (1#-4#) on the sides adjacent to the honeycomb ceramic regenerator 5# are set to 1 m / s. The specific velocity settings are shown in Table 1.

[0057] Table 1

[0058] Honeycomb ceramic regenerator number 1# 2# 3# 4# 5# Inlet velocity (m / s) 1 1 1 1 2

[0059] Build a pressure equalizing honeycomb ceramic model with different pressure equalizing chamber volumes. The percentage of the groove volume in the total volume of the honeycomb ceramic regenerator is denoted as v, and the specific structural parameters are shown in Table 2. Use the Star ccm+ software for numerical simulation.

[0060] Table 2

[0061] 40x40 45x45 50x50 55x55 60x60 65x65 70x70 H (mm) 40 45 50 55 60 65 70 W (mm) 40 45 50 55 60 65 70 v(％) 9.2 11.5 13.9 16.5 19.2 22.1 25.4

[0062] From Figure 2a 、 Figure 2b it can be seen that as the volume of the pressure equalizing chamber increases, the average mass flow rate at the outlets of the honeycomb ceramic regenerators (1#-4#) on the four sides gradually increases, and the average mass flow rate at the outlet of the honeycomb ceramic in the middle (5#) gradually decreases, indicating that the larger the volume of the pressure equalizing chamber, the more uniform the flow rate distribution. Combining Table 2 and Figure 2a 、 Figure 2b it can be known that when the percentage of the volume of the pressure equalizing chamber in the total volume of the ceramic is greater than 10%, the effect of uniform flow rate distribution is more obvious.

[0063] The principle that the pressure equalizing chamber structure makes the flow rate distribution inside the honeycomb ceramic regenerator more uniform is that the pressure equalizing chambers of adjacent honeycomb ceramic regenerators form a gas channel, enabling the pressure and flow rate of the gas to be redistributed in the channel. The groove is the channel for the gas flow between adjacent honeycomb ceramics. Therefore, the magnitude of the average velocity at the groove outlet (i.e., the flat part where the groove meets the corresponding end face of the body 1, the same below) and the magnitude of the average turbulent kinetic energy at the groove outlet can characterize the efficiency of the uniform distribution of gas pressure and flow rate.

[0064] From Figure 3a 、 Figure 3bIt can be seen that as the volume of the pressure equalizing chamber increases, the average velocity at the groove outlet (i.e., the average value of the velocities at the groove outlets of the interface between the upper and lower honeycomb ceramic regenerators, the same below) gradually decreases, and the average turbulent kinetic energy at the groove outlet (i.e., the average value of the turbulent kinetic energies at the grooves of the interface between the upper and lower honeycomb ceramic regenerators, the same below) also gradually decreases. Thus, it can be seen that as the volume of the pressure equalizing chamber increases, the gas flow velocity distribution inside the honeycomb ceramic regenerator becomes more uniform, but the effect of improving the uniformity of the gas flow velocity distribution per unit volume gradually decreases. At the same time, an excessively large volume of the pressure equalizing chamber will also cause the problem of reduced compressive strength of the honeycomb ceramic regenerator. Combining Table 2 and Figure 3a , Figure 3b , it is more appropriate to control the percentage of the volume of the pressure equalizing chamber in the total volume of the honeycomb ceramic regenerator at 10 - 25%.

[0065] Comparative Example 1, Examples 2 - 3

[0066] Repeat Example 1, with the only difference being: Referring to Figure 4, honeycomb ceramic regenerator models with pressure equalizing channels having a circular cross-section, a regular hexagon cross-section, and a regular octagon cross-section are respectively built. Among them, the geometric parameters of the circular pressure equalizing channel are radius R = 44 mm; the geometric parameters of the regular hexagon pressure equalizing channel: width W = 90 mm, depth H = 50 mm; the geometric parameters of the regular octagon pressure equalizing channel: width W = 90 mm, depth H = 45 mm. The proportions of the volumes of the two pressure equalizing chambers in the total volume of the honeycomb ceramic regenerator are similar. Table 3 shows the results of numerical simulation using Star ccm+ software.

[0067] Table 3

[0068]

[0069] Through comprehensive comparison, the performance of the regular hexagon pressure equalizing chamber structure is superior to that of the circular pressure equalizing chamber structure, and the performance of the regular octagon pressure equalizing chamber structure is superior to that of the regular hexagon pressure equalizing chamber structure. Therefore, using a 1 / 2 regular n-sided polygon for the groove shape helps to obtain a better pressure equalizing effect. Further considering that an overly complex structure will lead to an increase in production costs, n is taken as 4 - 10.

[0070] Examples 4 - 10, Comparative Examples 2 - 5

[0071] Repeat Example 1, with the only difference being: The cross-section of the pressure equalizing channel is octagonal, and X and Y are specifically shown in Table 4. Table 4 shows the results of numerical simulation using Star ccm+ software.

[0072] Table 4

[0073]

[0074] As can be seen from Table 4, as X increases, the average mass flow rate at the outlets of the honeycomb ceramics on the four sides gradually increases, while the average mass flow rate at the outlets of the honeycomb ceramics in the middle gradually decreases. Under the condition that Y = 0.15 remains unchanged, when X increases from 0.3 to 0.4, the average mass flow rate at the outlets of the honeycomb ceramics on the four sides increases by 0.8×10 -7 m / s, and the average mass flow rate at the outlets of the honeycomb ceramics in the middle decreases by 0.22×10 -6 m / s, and the flow rate uniformity effect is significantly improved; when X increases from 0.8 to 0.9, the average mass flow rate at the outlets of the honeycomb ceramics on the four sides increases by 0.1×10 -7 m / s, and the average mass flow rate at the outlets of the honeycomb ceramics in the middle decreases by 0.6×10 -7 m / s, and the flow rate uniformity effect hardly improves. The same phenomenon can also be reflected in the average velocity at the slot outlet and the average turbulent kinetic energy at the slot outlet. A similar law is also observed for the change in depth Y. When X = 0.5 remains unchanged, when the depth Y of the pressure equalizing chamber increases from 0.1 to 0.15, the average mass flow rate at the outlets of the honeycomb ceramics on the four sides increases by 0.7×10 -7 m / s, and the average mass flow rate at the outlets of the honeycomb ceramics in the middle decreases by 0.26×10 -6 m / s, and the flow rate uniformity effect is significantly improved; when Y increases from 0.3 to 0.35, the average mass flow rate at the outlets of the honeycomb ceramics on the four sides increases by 0.1×10 -7 m / s, and the average mass flow rate at the outlets of the honeycomb ceramics in the middle decreases by 0.3×10 -7 m / s, and the flow rate uniformity effect hardly improves. The same phenomenon can be seen in the average velocity at the slot outlet and the average turbulent kinetic energy at the slot outlet.

[0075] It can be seen that by controlling X and Y within a suitable range, it is helpful to obtain an outstanding pressure equalizing effect.

[0076] Example 11

[0077] Refer to Figure 5 - Fig. 8. Repeat Example 1, with the main differences being: the number of straight-through honeycomb channels 2 is 25×25 holes, the side length A is 150 mm, and the height L is 200 mm. The cross-section of the pressure equalizing channel is hexagonal, and the width W of the groove = 0.6×A = 90 mm, the depth H = 0.225×L = 45 mm, and the volume ratio of the pressure equalizing chamber is 20.9%.

[0078] The raw materials of the honeycomb ceramic regenerator include base powder, dispersant and grinding aid; by weight, the base powder includes 54 parts of bauxite powder, 4 parts of cordierite powder, 4 parts of Suzhou kaolin, 4 parts of pyrophyllite powder, 34 parts of mullite powder, 2 parts of potassium feldspar and 3 parts of raw talc. The addition amount of the dispersant is 2‰ of the total mass of the base powder, and the addition amount of the grinding aid is 2‰ of the total mass of the base powder. After weighing and mixing the raw material powder, raw material kneading, refining, pressing and drying processes are carried out, and then processing is carried out according to the above groove dimensions. The two ends of the dry blank are cut, and the cutting size is 1.1 times the length of the final product. After obtaining the cut dry blank, it is sent into the kiln for firing, and fired at 1300 °C for 3 h to obtain the finished product.

[0079] A regenerative furnace includes an exhaust gas passage, a regenerative bed and a combustion chamber which are connected in sequence. The regenerative bed is formed by stacking 2 layers of the honeycomb ceramic regenerators as described above.

[0080] Further, referring to Fig. 8, a computational fluid dynamics model of the honeycomb ceramic regenerator before and after grooving is established. Under the same condition model conditions, the simulation calculation results of computational fluid dynamics calculated by Star ccm+ software are shown in Figs. 9-10. It can be seen that before grooving, the fluid regions of the ordinary honeycomb ceramic regenerators are not connected, the velocity distributions between different honeycomb ceramic regenerators are quite different, and the fluid pressure differences at the same height of the honeycomb ceramic regenerator are large, and there are large velocity gradients and pressure gradients at the outlet of the honeycomb ceramic regenerator; after grooving, the velocity of the gas suddenly decreases when it enters the pressure equalizing chamber, the gas velocity is redistributed, and compared with before grooving, the pressure gradient of the gas pressure drop at the same horizontal height of different ceramic openings in the same layer is significantly reduced, and the pressure distribution at the same horizontal height is more uniform.

[0081] Example 12

[0082] See Figures 11 - 12 , repeating Example 1, the main differences are: the number of straight-through honeycomb channels 2 is 25*25 holes, the side length A is 150 mm, and the height L is 200 mm. The cross-section of the pressure equalizing channel is octagonal, and the width W of the groove = 0.7*A = 105 mm, the depth H = 0.225*L = 45 mm, and the volume ratio of the pressure equalizing chamber is 23.6%.

[0083] The raw materials of the honeycomb ceramic regenerator include basic powder, dispersant and grinding aid; by weight, the basic powder includes 50 parts of bauxite powder, 3 parts of cordierite powder, 1.5 parts of Suzhou kaolin, 2 parts of pyrophyllite powder, 38 parts of mullite powder, 1.5 parts of potassium feldspar and 3 parts of raw talc. The addition amount of the dispersant is 2‰ of the total mass of the basic powder, and the addition amount of the grinding aid is 2‰ of the total mass of the basic powder. After weighing and mixing the raw material powder, raw material kneading, refining, pressing and drying processes are carried out, and then processing is carried out according to the above groove dimensions. The two ends of the dry blank are cut, and the cutting size is 1.1 times the length of the final product. After obtaining the cut dry blank, it is sent into the kiln for firing. After firing at 1300 °C for 3 h, the finished product is obtained.

[0084] Example 13

[0085] See Figures 13 - 14 , repeat Example 1, the main differences are: the number of straight honeycomb channels 2 is 25*25 holes, the side length A is 150 mm, and the height L is 150 mm. The cross-section of the pressure equalizing channel is decagonal, and the grooving width W = 0.6*A = 90 mm, and the depth H = 0.3*L = 45 mm.

[0086] The raw materials of the honeycomb ceramic regenerator include basic powder, dispersant and grinding aid; by weight, the basic powder includes 58 parts of bauxite powder, 2.5 parts of cordierite powder, 1 part of Suzhou kaolin, 1 part of pyrophyllite powder, 30 parts of mullite powder, 3.5 parts of potassium feldspar and 3 parts of raw talc. The addition amount of the dispersant is 2‰ of the total mass of the basic powder, and the addition amount of the grinding aid is 2‰ of the total mass of the basic powder. After weighing and mixing the raw material powder, raw material kneading, refining, pressing and drying processes are carried out, and then processing is carried out according to the above groove dimensions. The two ends of the dry blank are cut, and the cutting size is 1.1 times the length of the final product. After obtaining the cut dry blank, it is sent into the kiln for firing. After firing at 1300 °C for 3 h, the finished product is obtained.

[0087] The content clarified in the above embodiments should be understood that these embodiments are only used to illustrate the present invention more clearly, rather than to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art to the present invention fall within the scope defined by the appended claims of this application.

Claims

1. A honeycomb ceramic regenerator body, comprising a body (1) in the shape of a regular quadrangular prism. The body (1) is provided with straight-through honeycomb channels arranged in a parallel array. The straight-through honeycomb channels extend along the length direction of the body (1) and penetrate through the two end faces of the body (1). It is characterized in that two mutually orthogonal grooves (2) are formed on one end face of the body (1). The grooves (2) penetrate through the two side faces of the body (1). The width W of the grooves (2) on the end face of the body (1) and the side length A of the body (1) satisfy: W = A * X, where 0.4 ≤ X ≤ 0.8; the depth H of the grooves (2) and the length L of the body (1) satisfy: H = L * Y, where 0.15 ≤ Y ≤ 0.3; during use, the end faces of every two bodies (1) provided with grooves (2) are butted, so that the grooves (2) on the two bodies (1) are symmetrically distributed. At this time, every two opposite grooves (2) form a pressure equalizing channel, and two pressure equalizing channels are orthogonal to form a pressure equalizing chamber. Among them, the cross-section of the pressure equalizing chamber is in the shape of a regular polygon; the polygon is an octagon; the volume of the grooves (2) is 10-25% of the volume of the body (1).

2. The honeycomb ceramic regenerator body according to claim 1, It is characterized in that 0.5≤X≤0.7。 3. The honeycomb ceramic regenerator body according to claim 1, It is characterized in that 0.55≤X≤0.65。 4. The honeycomb ceramic regenerator body according to claim 1, It is characterized in that 0.15≤Y≤0.3。 5. The honeycomb ceramic regenerator body according to claim 1, It is characterized in that 0.2≤Y≤0.25。 6. The honeycomb ceramic regenerator body according to claim 1, It is characterized in that The grooves (2) extend along the side length direction of the body (1).

7. The honeycomb ceramic regenerator body according to claim 1, It is characterized in that The central axis of the pressure equalizing channel is located on the end face of the body (1) and passes through the central axis of the body (1).

8. The honeycomb ceramic regenerator body according to any one of claims 1-5, It is characterized in that The number of straight-through honeycomb channels in the body (1) is 13 * 13 to 60 * 60.

9. The honeycomb ceramic regenerator body according to any one of claims 1-5, It is characterized in that The raw materials of the honeycomb ceramic regenerator body include basic powder, dispersant and grinding aid; by weight, the basic powder includes 40-60 parts of bauxite powder, 2-6 parts of cordierite powder, 1-4 parts of Suzhou kaolin, 0.5-1.5 parts of pyrophyllite powder, 20-35 parts of mullite powder, 2-4 parts of potassium feldspar and 2-3 parts of raw talc. The addition amount of the dispersant is 2-5‰ of the total mass of the basic powder, and the addition amount of the grinding aid is 0.5-2‰ of the total mass of the basic powder.

10. The honeycomb ceramic regenerator body according to claim 9, It is characterized in that Al in bauxite powder 2 O 3 The alumina content > 80 wt%.

11. The honeycomb ceramic regenerator body according to claim 9, It is characterized in that The dispersant is industrial white oil.

12. A regenerative furnace, comprising an exhaust gas channel, a regenerative bed and a combustion chamber connected in sequence, It is characterized in that The regenerative bed is composed of a plurality of honeycomb ceramic regenerator bodies according to any one of claims 1-11.

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