CN219589446U - Novel connecting air pipe structure for cement clinker line preheater - Google Patents

Abstract

The utility model discloses a novel connecting air pipe structure for a cement clinker line preheater, which relates to the field of cement production and comprises a shell, wherein the inner wall of the shell is made of fireproof materials, a feeding port is arranged on the side wall of the shell, the shell comprises an upper shell at the upper part, a cavity at the middle part and an air inlet at the lower part, an air outlet is arranged on the upper shell, a waisting piece is arranged on the cavity, and the waisting piece divides the cavity into an upper cavity and a lower cavity; the waist-folding piece is added, the stroke of the material-gas composite flow is increased, the heat exchange time of the composite flow is further increased, the heat exchange efficiency is improved, the energy utilization efficiency is improved, the production energy consumption of unit cement is reduced, and the purposes of energy conservation, emission reduction and cost reduction are achieved; the waist-folding piece is welded with the upper cavity and the lower cavity in a connecting mode, the connecting mode is simple, the welding technology is mature, and the operability is high.

Description

Novel connecting air pipe structure for cement clinker line preheater

Technical Field

The utility model relates to the field of cement production, in particular to a novel connecting air pipe structure for a cement clinker line preheater.

Background

The key technology of the cement clinker suspension preheater system is provided with a cyclone, a connecting air pipe (heat exchange pipeline), a decomposing furnace, a rotary kiln and a grate cooler (for short, barrel-pipe-furnace-kiln-machine). The five groups of key technical equipment are integrated into a whole, are associated with each other and are mutually restricted to form a complete thermal system, take the tasks of cement clinker preheating, decomposing, calcining and cooling, firstly, raw materials are fed into a connecting air pipe at the inlet of the primary cyclone barrel, and are fed into the system from a feeding port, so that the raw materials are rapidly dispersed and suspended in air flow, and immediately perform heat exchange between gas and solid phases, and the heat exchange efficiency is extremely high. The gas-material separation process comprises the steps of separating the gas-material after the mixed gas-material enters the primary cyclone barrel: the raw meal is carried by the air flow and enters the cyclone cylinder at a high speed in a tangential direction, and rotates downwards in the cylinder until the inner rotation of the cone part is reflected upwards, when the raw meal rotates along with the air flow, the raw meal has a tendency to move towards the wall under the action of centrifugal force, and large particles have large mass and large inertia and collide with the wall to stall and fall, and small particles ascend along with the air flow. Separating from the raw material; the received raw materials enter a connecting air pipe of a secondary cyclone through a discharge pipe to perform secondary heat exchange, and then are separated through the secondary cyclone, and enter a rotary kiln to be calcined through a five-stage cyclone preheater in sequence;

the traditional preheater connecting air pipe is difficult to further lengthen the length of the rising pipeline due to the limited height of the tower, so that the heat exchange time of raw meal and hot air flow cannot be improved, and the purposes of increasing the heat exchange efficiency and improving the energy utilization efficiency are difficult to achieve.

Accordingly, there is a need to provide a new connecting duct structure for cement clinker line preheaters that solves the above-mentioned problems.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a cement clinker line pre-heater is with novel connection tuber pipe structure, includes the casing, including shells inner wall for fire prevention material, be equipped with the pay-off mouth on the lateral wall of casing, the casing includes the air inlet of the cavity, the lower part in the middle part of last casing on upper portion, be equipped with the gas vent on the last casing, be equipped with the receipts waist spare on the cavity, it divide into cavity and lower cavity with the cavity to receive the waist spare.

Preferably, the waisted member is positioned below the feeding port on the chamber.

Preferably, the included angle between the waist line of the waisted piece and the bus is 60 degrees.

Preferably, the waist-holding piece is welded with the upper cavity and the lower cavity.

Preferably, the waist-receiving member has a height of 2000mm.

The utility model has the beneficial effects that:

1. the utility model has simple structure and convenient manufacture;

2. the waist-folding piece is added, the stroke of the material-gas composite flow is increased, the heat exchange time of the composite flow is further increased, the heat exchange efficiency is improved, the energy utilization efficiency is improved, the production energy consumption of unit cement is reduced, and the purposes of energy conservation, emission reduction and cost reduction are achieved;

3. the waist-folding piece is welded with the upper cavity and the lower cavity in a connecting mode, the connecting mode is simple, the welding technology is mature, and the operability is high.

Drawings

FIG. 1 is a schematic structure of the utility model, and the arrow direction represents the trend of the material gas combined flow.

Fig. 2 is a schematic design view of the waisted component in the present utility model.

Fig. 3 is a schematic diagram of CFD simulation of the feed gas composite flow of the present utility model.

Fig. 4 is a schematic structural view of a connecting air duct for a conventional cement clinker line preheater.

Wherein, 1-casing, 2-pay-off mouth, 3-upper casing, 4-cavity, 5-air inlet, 6-gas vent, 7-waisted piece, 8-upper cavity, 9-lower cavity.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

As shown in fig. 1 to 4, a novel connection air duct structure for a cement clinker line preheater comprises a shell 1, wherein the inner wall of the shell 1 is made of fireproof materials, a feeding port 2 is formed in the side wall of the shell 1, the shell 1 comprises an upper shell 3 at the upper part, a cavity 4 at the middle part and an air inlet 5 at the lower part, an air outlet 6 is formed in the upper shell 3, a waisting piece 7 is arranged on the cavity 4, and the cavity 4 is divided into an upper cavity 8 and a lower cavity 9 by the waisting piece 7.

In this embodiment, the waisted member 7 is located below the feeding port 2 in the chamber 4.

In this embodiment, the waist line of the waist-holding member 7 forms an angle of 60 ° with the bus bar (see fig. 2).

In this embodiment, the waist member 7 is welded to the upper chamber 8 and the lower chamber 9.

In this embodiment, the waist-receiving member 7 has a height of 2000mm (see fig. 2).

By using the connecting air pipe structure, the waisted piece 7 is added, so that the travel of materials in the shell 1 is increased, the heat exchange time of the materials is further increased, and the heat exchange efficiency is improved.

Fig. 3 is a schematic diagram of a CFD simulation of a material-gas composite flow according to the present utility model, wherein different colors represent material particles with different sizes, and the CFD simulation is for showing that the presence of the waisted piece 7 increases the material stroke in the housing 1 (the material runs mostly straight up and down without the waisted piece 7 in the prior art), so as to increase the residence heat exchange time.

The utility model improves the energy utilization efficiency, reduces the production energy consumption of unit cement, achieves the purposes of energy conservation, emission reduction and cost reduction, and has simple structure and convenient manufacture and installation.

It will be appreciated by those skilled in the art that the present utility model can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the utility model or equivalents thereto are intended to be embraced therein.

Claims (1)

1. The novel connecting air pipe structure for the cement clinker line preheater is characterized by comprising a shell (1), wherein the inner wall of the shell (1) is made of fireproof materials, a feeding port (2) is formed in the side wall of the shell (1), the shell (1) comprises an upper shell (3) at the upper part, a cavity (4) at the middle part and an air inlet (5) at the lower part, an air outlet (6) is formed in the upper shell (3), a waisting piece (7) is arranged on the cavity (4), and the waisting piece (7) divides the cavity (4) into an upper cavity (8) and a lower cavity (9);

the waist-holding piece (7) is positioned on the chamber (4) lower than the feeding port (2);

the included angle between the waist line of the waist-holding piece (7) and the bus is 60 degrees;

the waist-folding piece (7) is welded with the upper cavity (8) and the lower cavity (9);

the height of the waisted piece (7) is 2000mm.