A high-throughput split-flow cyclone preheater

Abstract

The present application relates to the field of cement production equipment, in particular to a large throughput shunt type cyclone preheater, which comprises a cyclone shell, a cyclone outer cylinder, a double air guide spiral, a cyclone inner cylinder, a discharge disc and an air inlet pipe; the cyclone shell is internally fixedly installed with the cyclone outer cylinder; the nested cyclone outer cylinder and the cyclone inner cylinder are arranged, so that the large batch of material gas can be divided into two small batches and respectively enter the inner and outer cyclone cylinders for preheating and separation; under the condition of unchanged separation efficiency, the treatment capacity of the material gas is greatly improved, and the system cost is reduced; the single air guide spiral and the double air guide spiral are arranged, so that the material gas enters the cyclone cylinder in the form of rotational flow, which makes the transition of the mixed gas into the cyclone cylinder particularly stable, thereby avoiding the interference turbulence.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cement production equipment, in particular to a large throughput shunt type cyclone preheater. BACKGROUND

[0002] Cyclone preheaters are used to separate fine material from flowing gas by centrifugal force, which include a cylindrical outer shell, usually inclined to the bottom, the gas flow containing solid particles to be separated is cut directly from the top of the outer shell under the cover, so as to form a vortex flow in the outer shell, in this process, the particles are thrown to the wall under the action of centrifugal force, and the particles are strongly decelerated there due to the action of friction, then the decelerated particles slide downward in the container and enter the next lower separator through the outlet opening provided at the lower end of the separator shell or the gas supply pipe or collection container, and the purified gas flow is extracted from the separator shell through the gas outlet pipe arranged in the center of the upper cover;

[0003] The cyclone preheater is composed of a feeding pipe, a distributor, a heat exchange pipe, a cyclone drum, an inner cylinder, an air outlet pipe and a wind lock valve, and the cyclone preheater system is composed of a plurality of (four in series, called four-stage cyclone preheater, five in series, called five-stage cyclone preheater, and so on) units, which realizes the functions of preheating raw materials and partial carbonate decomposition through heat exchange between gas and solid and the separation effect of the cyclone drum.

[0004] However, due to the limitations of structure and series form, the existing multi-stage cyclone preheating system requires a large investment and high cost to further improve the processing capacity of materials per unit time, and the processing capacity is limited. SUMMARY

[0005] Therefore, the present application is made in view of the above problems, and the purpose of the present application is to divide a large amount of material gas into two parts for preheating and separation by setting a cyclone outer cylinder and a cyclone inner cylinder, thereby greatly improving the processing capacity of material gas under the condition of unchanged separation efficiency, to solve the problem of small processing capacity of material per unit time in the existing multi-stage cyclone preheating system, and the present application achieves the above purpose through the following technical solutions:

[0006] The application discloses a high-throughput shunt cyclone preheater which comprises a cyclone shell, a cyclone outer cylinder, a double air guide spiral, a cyclone inner cylinder, a discharge disc and an air inlet pipe.

[0007] Preferably, the multiple high-throughput shunt cyclone preheaters are arranged in multiple levels to form a multi-stage cyclone preheating system.

[0008] Preferably, the lower end of the lower discharge groove penetrates the wall of the cyclone outer cylinder and is communicated with the interior of the cyclone shell.

[0009] Preferably, the double air guide spiral is a double helix structure and has two helix blades.

[0010] Preferably, one end of the outer flow guide discharge port is communicated with the cyclone outer cylinder, and the other end is communicated with the outlet of one helix blade of the double air guide spiral in the cyclone shell.

[0011] Preferably, the outer flow guide discharge port can guide part of the mixed material gas in the cyclone shell to the space between the cyclone outer cylinder and the cyclone inner cylinder through one helix blade of the double air guide spiral.

[0012] Preferably, one end of the inner flow guide discharge port is communicated with the cyclone inner cylinder, and the other end is communicated with the outlet of the other helix blade of the double air guide spiral in the cyclone shell, and the inner flow guide discharge port can guide part of the mixed material gas in the cyclone shell to the interior of the cyclone inner cylinder through the other helix blade of the double air guide spiral.

[0013] The application has the following beneficial effects:

[0014] 1. The nested cyclone outer cylinder and the cyclone inner cylinder can divide the large amount of material gas into two small amounts and preheat and separate the material gas in the two cyclone cylinders, thereby greatly improving the processing capacity of the material gas and reducing the system cost under the condition that the separation efficiency is unchanged.

[0015] 2. The single air guide spiral and the double air guide spiral can make the material gas enter the cyclone cylinder in the form of rotational flow, which can make the transition of the mixed gas into the cyclone cylinder particularly stable, thereby avoiding the interference turbulence.

[0016] 3. High temperature gas flows inside and outside the cyclone outer cylinder or the cyclone inner cylinder, so that the heat dissipated when the gas flows is not lost, the temperature in the cyclone inner and outer cylinders is higher, and the heat exchange efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole half-section schematic diagram of a multi-stage series system of a large-throughput split-flow cyclone preheater of the application.

[0018] Figure 2 It is a whole half-section schematic diagram of a large-throughput split-flow cyclone preheater of the application.

[0019] Figure 3 It is Figure 2 A-A line section view.

[0020] Figure 4 It is Figure 3 B-B line section view.

[0021] BRIEF DESCRIPTION OF DRAWINGS: 110, cyclone shell; 111, outer guide flow discharge port; 112, inner guide flow discharge port; 120, cyclone outer cylinder; 121, lower discharge slot; 122, outer discharge port; 130, double air guide spiral; 140, cyclone inner cylinder; 141, inner air outlet; 142, inner discharge pipe; 150, discharge disc; 160, air inlet pipe. DETAILED DESCRIPTION

[0022] The preferred embodiments of the application will be described in detail with reference to the attached drawings, however the application can be realized in various different forms, therefore the application is not limited to the embodiments described below, and in addition, in order to more clearly describe the application, components not connected with the application will be omitted from the drawings;

[0023] As Figure 1 shown, a plurality of large-throughput split-flow cyclone preheaters are arranged up and down to form a multi-stage cyclone preheating system;

[0024] As Figure 2 , 3 shown, a large-throughput split-flow cyclone preheater comprises a cyclone shell 110, a cyclone outer cylinder 120, a double air guide spiral 130, a cyclone inner cylinder 140, a discharge disc 150, and an air inlet pipe 160.

[0025] The cyclone shell 110 is a cylindrical barrel, a cyclone outer barrel 120 is fixedly installed inside the cyclone shell 110, the cyclone outer barrel 120 is substantially funnel-shaped, and a discharge chute 121 is arranged inside the circumferential wall of the cyclone outer barrel 120, the lower end of the discharge chute 121 penetrates the barrel wall of the cyclone outer barrel 120 and communicates with the inside of the cyclone shell 110, a double wind guide spiral 130 is arranged between the cyclone outer barrel 120 and the cyclone shell 110, the double wind guide spiral 130 is a double spiral structure and has two spiral blades, a cyclone inner barrel 140 is fixedly installed inside the cyclone outer barrel 120, the cyclone inner barrel 140 is a conical hopper shell structure, an inner air outlet 141 is arranged at the upper end of the cyclone inner barrel 140, an inner discharge pipe 142 is arranged at the lower end of the cyclone inner barrel 140, an outer flow guide discharge port 111 is arranged at the top between the cyclone outer barrel 120 and the cyclone shell 110, one end of the outer flow guide discharge port 111 communicates with the cyclone outer barrel 120, and the other end communicates with the outlet of one spiral blade of the double wind guide spiral 130 in the cyclone shell 110, the outer flow guide discharge port 111 can guide part of the mixed material gas in the cyclone shell 110 to pass through one spiral blade of the double wind guide spiral 130 and enter between the cyclone outer barrel 120 and the cyclone inner barrel 140, an inner flow guide discharge port 112 is arranged at the top between the cyclone outer barrel 120 and the cyclone inner barrel 140, one end of the inner flow guide discharge port 112 communicates with the cyclone inner barrel 140, and the other end communicates with the outlet of the other spiral blade of the double wind guide spiral 130 in the cyclone shell 110, the inner flow guide discharge port 112 can guide part of the mixed material gas in the cyclone shell 110 to pass through the other spiral blade of the double wind guide spiral 130 and enter the inside of the cyclone inner barrel 140;

[0026] The discharge disc 150 is fixedly installed at the lower end of the cyclone outer barrel 120, the discharge disc 150 is a hollow conical disc, the upper end of the discharge disc 150 can communicate with the outer discharge port 122 and the inner discharge pipe 142, the lower end of the discharge disc 150 communicates with the 121 of the next stage cyclone preheater, the air inlet pipe 160 is four in number and is fixedly installed on the lower end surface of the cyclone shell 110 in a uniform manner along the circumference of the cyclone shell 110, the upper end of the air inlet pipe 160 can communicate with the inside of the cyclone shell 110, and the lower end of the air inlet pipe 160 penetrates the discharge disc 150 and communicates with the inside of the cyclone outer barrel 120 of the next stage cyclone preheater.

[0027] The working principle of the application is as follows:

[0028] The high-temperature flue gas discharged from the rotary furnace or the decomposition furnace enters the upper end cyclone preheaters in turn from the air inlet pipe 160 in the lower end first-stage cyclone preheater, and the material discharged from the pulverizer enters the lower end cyclone preheaters in turn from the discharge slot 121 in the upper end first-stage cyclone preheater. When the high-temperature flue gas enters the space between the cyclone shell 110 and the cyclone outer cylinder 120 from the air inlet pipe 160 in the cyclone preheater, the material just flows out of the discharge slot 121 in the cyclone outer cylinder 120. The material is scattered by the impact of the high-temperature flue gas and starts to flow upwards along the two spirals on the double guide-vane spiral 130 between the cyclone shell 110 and the cyclone outer cylinder 120 along with the flue gas. In the process of flowing and scattering, the material mixes with the gas and heat is transferred. The mixed material and gas are finally tangentially introduced into the inside of the cyclone outer cylinder 120 and the cyclone inner cylinder 140 through the outer guide-vane discharge port 111 and the inner guide-vane discharge port 112, respectively. In the inside of the cyclone outer cylinder 120 and the cyclone inner cylinder 140, the rotational flow is formed to complete the separation of the material and the gas. The material flows out of the outer discharge port 122 at the lower end of the cyclone outer cylinder 120 and the inner discharge pipe 142 at the lower end of the cyclone inner cylinder 140 into the discharge tray 150, respectively. The gas is discharged from the upper end of the cyclone outer cylinder 120 and the inner air outlet 141 into the upper-stage mixing and flow divider. When the material reaches the lower end first-stage cyclone preheater and is discharged into the rotary furnace or the decomposition furnace, the preheating is completed.

Claims

1. A high-throughput split-flow cyclone preheater, comprising a cyclone housing (110), a cyclone outer cylinder (120), a double air-guiding spiral (130), a cyclone inner cylinder (140), a discharge tray (150), and an air inlet pipe (160); characterized in that: A cyclone outer cylinder (120) is fixedly installed inside the cyclone shell (110); a material discharge trough (121) is provided inside the circumferential wall of the cyclone outer cylinder (120); a double air guide spiral (130) is provided between the cyclone outer cylinder (120) and the cyclone shell (110); a cyclone inner cylinder (140) is fixedly installed inside the cyclone outer cylinder (120); an inner air outlet (141) is provided at the upper end of the cyclone inner cylinder (140), and an inner discharge pipe (142) is provided at the lower end of the cyclone inner cylinder (140); the top end between the cyclone outer cylinder (120) and the cyclone shell (110) is provided with a plurality of air outlets. An outer guide outlet (111) is provided, and an inner guide outlet (112) is provided at the top end between the cyclone outer cylinder (120) and the cyclone inner cylinder (140); the discharge plate (150) is fixedly installed at the lower end of the cyclone outer cylinder (120), and the upper end of the discharge plate (150) can be communicated with the outer discharge outlet (122) and the inner discharge pipe (142); the number of the air inlet pipes (160) is four, and they are evenly fixed on the lower end surface of the cyclone shell (110) along the circumference of the cyclone shell (110), and the upper end of the air inlet pipe (160) can be communicated with the inside of the cyclone shell (110). The double air guide spiral (130) is a double helix structure having two spiral blades. One end of the outer guide outlet (111) is connected to the cyclone outer cylinder (120), and the other end is connected to the outlet of one spiral blade in the double air guide spiral (130) in the cyclone shell (110); one end of the inner guide outlet (112) is connected to the cyclone inner cylinder (140), and the other end is connected to the outlet of the other spiral blade in the double air guide spiral (130) in the cyclone shell (110). The inner guide outlet (112) can guide part of the mixed material gas in the cyclone shell (110) into the interior of the cyclone inner cylinder (140) through the other spiral blade on the double air guide spiral (130).

2. A high-throughput split-flow cyclone preheater according to claim 1, characterized in that: The lower end of the discharge chute (121) passes through the wall of the cyclone outer cylinder (120) and is in communication with the interior of the cyclone shell (110).

3. The high-throughput split-flow cyclone preheater according to claim 1, characterized in that: The outer guide outlet (111) can guide part of the mixed material gas in the cyclone shell (110) into between the cyclone outer cylinder (120) and the cyclone inner cylinder (140) through a spiral blade on the double air guide spiral (130).

4. A multi-stage cyclone preheating system, characterized by: The preheater is formed by arranging a plurality of high-throughput split-flow cyclone preheaters as described in any one of claims 1 to 3 up and down.

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