Energy-saving dust falling device of preheater

Abstract

The utility model provides an energy-saving dust falling device of a preheater, and relates to the technical field of dust falling devices. An energy-saving dust-falling device of a preheater comprises a cyclone, an air inlet is formed in the side wall of the cyclone, an air outlet is formed in the top of the cyclone, and a discharging port is formed in the bottom of the cyclone. A separator is arranged on the inner side wall of the cyclone cylinder and is in a circular truncated cone shape, and the end, with the smaller diameter, of the separator faces upwards. By adopting the cyclone dust collection device, the dust content of waste gas at the outlet of the cyclone can be reduced, the dust collection efficiency is improved, the heat loss of a kiln system is reduced, the power consumption of a high-temperature fan is further reduced, the equipment abrasion is reduced, the maintenance cost is reduced, and the production cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dust falling device technical field, specifically, relate to a preheater energy -conserving dust falling device. BACKGROUND

[0002] The burning system in the cement production process generally adopts double series five stage cyclone preheater, online decomposing furnace, rotary kiln and other equipment. When dedusting, raw meal powder mixes with high temperature gas and enters into the cyclone (cyclone dust collector), the raw meal powder is separated from the gas in the cyclone, and the gas is discharged from the outlet of the cyclone, and the raw meal powder that settles down enters into the next stage cyclone, but the gas-solid separation efficiency of the existing cyclone is low, and the dust amount carried by the high temperature gas is large, which directly causes the heat loss of the kiln system. The dust content of the cyclone outlet is large, which indirectly affects the energy consumption of the system, and the high dust content of the cyclone causes fast wear of the high temperature fan blade, which reduces the service life of the high temperature fan blade.

[0003] (1) The original design structure of the cyclone has certain defects, the cone is small, which causes material reflection and escape, and a large amount of back dust escapes from the outlet of the cyclone.

[0004] (2) The internal leakage is serious, and the internal leakage has great influence on the separation efficiency of the cyclone. INVENTION CONTENTS

[0005] The utility model discloses a preheater energy -conserving dust falling device, which can reduce the dust content of the exhaust gas of the cyclone outlet, improve the dust collection efficiency, reduce the heat loss of the kiln system, and further reduce the power consumption of the high temperature fan, while reducing the equipment wear and tear and reducing the maintenance cost, thereby saving the production cost.

[0006] The utility model discloses the technical scheme that adopts:

[0007] The preheater energy -conserving dust falling device provided by the embodiment comprises a cyclone, a side wall of the cyclone is provided with an air inlet, a top of the cyclone is provided with an air outlet, and a bottom of the cyclone is provided with a discharge port.

[0008] Further, in some embodiments of the utility model, the separator bottom is provided with a groove.

[0009] Further, in some embodiments of the utility model, a plurality of connecting rods are arranged between the separator and the inner side wall of the cyclone, and the connecting rods are arranged at intervals along the circumferential side of the separator.

[0010] Further, in some embodiments of the utility model, the separator is located on the inner side wall of the conical part of the cyclone.

[0011] Further, in some embodiments of the present application, the cyclone barrel bottom is provided with a discharging pipe communicated with the discharge port.

[0012] Further, in some embodiments of the present application, the discharging pipe is provided with a plurality of air locking valves.

[0013] Compared with the prior art, the present application has at least the following advantages or beneficial effects:

[0014] The present application provides a kind of preheater energy-saving dust falling device, including cyclone barrel, the side wall of cyclone barrel is equipped with air inlet, the top of cyclone barrel is equipped with air outlet, the bottom of cyclone barrel is equipped with discharge port;The inner side wall of cyclone barrel is equipped with separator, separator is circular truncated cone shape, the smaller diameter end of separator is upwards.It can reduce cyclone barrel outlet waste gas dust content, improve dust collection efficiency, reduce the heat loss of kiln system, in turn reduce high-temperature fan power consumption, while reducing equipment wear and tear, reduce maintenance cost, save production cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as limiting the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained according to these drawings.

[0016] Fig. 1 The front view of the dust falling device provided by the present application is provided.

[0017] Fig. 2 The cross-sectional view of the cyclone barrel provided by the present application is provided.

[0018] Figure legend: 1-cyclone barrel;2-air inlet;3-air outlet;4-discharge port;5-separator;6-groove;7-connecting rod;8-discharging pipe;9-air locking valve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application, the technical scheme in the embodiments of the present application is described clearly and completely, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments that would be obvious to one of ordinary skill in the art and obtained by combining the components of the application are within the scope of the application.

[0021] It should be noted that like reference numerals and letters refer to like items in the drawings, and thus once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0022] In the description of the embodiments of the application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are merely for the convenience of describing the application and simplifying the description, and thus cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In addition, if the terms "horizontal", "vertical" and the like appear, they do not mean that the component must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the embodiments of the application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "provided", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0025] Embodiments

[0026] Please refer to Figs. 1-2The embodiment provides a preheater energy-saving dust reduction device, which comprises a cyclone barrel 1, the side wall of the cyclone barrel 1 is provided with an air inlet 2, the top of the cyclone barrel 1 is provided with an air outlet 3, and the bottom of the cyclone barrel 1 is provided with a discharge port 4; the inner side wall of the conical part of the cyclone barrel 1 is provided with a separator 5, the separator 5 is in the shape of a circular truncated cone, the smaller-diameter end of the separator 5 faces upwards, and the bottom of the separator 5 is provided with a groove 6. A plurality of connecting rods 7 are arranged between the separator 5 and the inner side wall of the cyclone barrel 1 and are arranged at intervals along the peripheral side of the separator 5. By arranging the plurality of connecting rods 7, the separator 5 can be fixed to the inner side wall of the cyclone barrel 1 through the connecting rods 7.

[0027] In some embodiments of the utility model, the bottom of the cyclone barrel 1 is provided with a discharging pipe 8 in communication with the discharge port 4, and the discharging pipe 8 is provided with a plurality of air locking valves 9. The air locking valves 9 in the embodiment are two and are micro-motion air locking valves.

[0028] In actual use, the high-temperature gas containing dust enters the cyclone barrel 1 through the air inlet 2, the gas is separated after gas-solid separation, the separated solids enter the discharging pipe 8 through the discharge port 4 at the bottom of the cyclone barrel 1, and the separated gas is discharged through the air outlet 3 at the top of the cyclone barrel 1. Since the separator 5 is arranged on the inner side wall of the cyclone barrel 1, the separated gas can be subjected to secondary separation when flowing through the separator 5 after one separation of the cyclone barrel 1. Meanwhile, the two air locking valves 9 are installed on the discharging pipe 8, which reduces the internal leakage of the discharging pipe 8 and the external leakage of the air locking valves 9, thereby reducing the internal leakage of the cyclone barrel 1, strengthening air locking, reducing system air leakage, reducing secondary dust raising in the cyclone barrel, and improving the separation efficiency of the cyclone barrel.

[0029] Therefore, the preheater energy-saving dust reduction device provided by the application can reduce the dust content of the exhaust gas at the outlet of the cyclone barrel 1, improve the dust collection efficiency, reduce the heat loss of the kiln system, and in turn reduce the power consumption of the high-temperature fan, reduce equipment wear and tear, reduce maintenance costs, and save production costs.

[0030] The actual application effect and popularization situation of the application are as follows:

[0031] The measured value of the dust content of the exhaust gas at the outlet of the C1 cyclone barrel before the implementation of the project is 98.32 mg / Nm 3 , and the measured value of the dust content of the exhaust gas at the outlet of the C1 cyclone barrel after the implementation of the project is 55.22 mg / Nm 3 , which is reduced by 43.84% compared with before the implementation, the dust collection efficiency is improved to 94.76%, and for every 1% improvement in the dust collection efficiency, the heat loss is reduced by 0.17 kgce / t, in 2023, 491450 tons of clinker will be produced, and the total heat loss of 199.67 tons of standard coal will be reduced, which is equivalent to 247.73 tons of raw coal saved, the weighted price of raw coal in 2023 is 1316 yuan / t, and the production cost is saved by 326,000 yuan.

[0032] The electricity consumption of the high-temperature fan is reduced from 7.18 kwh / t to 6.82 kwh / t, and a total of 176922 kwh of electricity is saved, and the electricity cost is saved by 88.5 thousand yuan.

[0033] Before the implementation of the project, the high dust content of the C1 cyclone cylinder caused fast wear of the high-temperature fan blades, shortened the service life of the high-temperature fan blades, and required welding of the high-temperature fan blades once a year. After the implementation of the project, the dust content of the C1 cyclone cylinder is reduced, and the wear is small after the production is stopped in 2023, and no other maintenance such as welding of the shell is performed, thereby saving maintenance costs of 50 thousand yuan.

[0034] The calculation basis of each column is as follows:

[0035] The clinker production in 2023 is 491450 tons, the C1 separation efficiency before the implementation of the project is 92.37%, and the C1 separation efficiency after the implementation of the project is improved to 94.76%. For each 1% improvement in separation efficiency, the heat loss is reduced by 0.17 kgce / t. The standard coal saved in 2023 is = (94.76-92.37) x 0.17 x 491450 / 1000 = 199.67 tons. The standard coal is converted into raw coal = 199.67 / 0.8060 = 247.73 tons. The average unit price of raw coal in 2023 is 1316 yuan / t, and the production cost saved is = 247.73 x 1316 / 10000 = 32.6 thousand yuan.

[0036] The electricity consumption of the high-temperature fan is reduced from 7.18 kwh / t to 6.82 kwh / t, and a total of 176922 kwh of electricity is saved, and the electricity cost is saved by 88.5 thousand yuan.

[0037] The dust content of the C1 cyclone cylinder is reduced after the implementation of the project, the wear is small after the production is stopped in 2023, and no welding is performed, thereby saving maintenance costs of 50 thousand yuan. A total of 32.6+8.85+5 = 46.45 thousand yuan of cost is saved.

[0038] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, it is obvious that the application is not limited to the details of the above exemplary embodiments, and the application can be implemented in other specific forms without departing from the spirit or basic characteristics of the application.

[0039] Therefore, from any view, the embodiments should be regarded as exemplary and non-limiting, the scope of the application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A preheater energy-saving dust reduction device, comprising a cyclone cylinder, a side wall of the cyclone cylinder is provided with an air inlet, a top of the cyclone cylinder is provided with an air outlet, and a bottom of the cyclone cylinder is provided with a discharge port; characterized in that: The inner side wall of the cyclone barrel is provided with a separator, which is in the shape of a circular truncated cone, and the smaller-diameter end of the separator faces upward.

2. The preheater energy-saving dust reduction device according to claim 1, characterized in that: The bottom of the separator is provided with a groove.

3. The preheater energy saving dust reduction device according to claim 1, characterized in that: A plurality of connecting rods are arranged between the separator and the inner side wall of the cyclone barrel, and the connecting rods are arranged at intervals along the circumferential side of the separator.

4. The preheater energy saving dust reduction device of claim 1, wherein: The separator is located at the inner side wall of the conical part of the cyclone barrel.

5. The preheater energy saving dust reduction device of claim 1, wherein: The bottom of the cyclone barrel is provided with a discharge pipe which communicates with the discharge port.

6. The preheater energy saving dust reduction device according to claim 5, characterized in that: The discharge pipe is provided with a plurality of air locking valves.

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