CN-224215852-U - Pre-heating and pre-decomposing system

CN224215852UCN 224215852 UCN224215852 UCN 224215852UCN-224215852-U

Abstract

The utility model relates to the technical field of cement preparation, in particular to a preheating and pre-decomposing system. The preheating pre-decomposition system comprises a first row of preheaters, a second row of preheaters, a feeding mechanism, a discharging mechanism and a distributing mechanism, wherein the feeding mechanism is respectively communicated with a first row of first-stage rising pipelines and a second row of first-stage rising pipelines through the discharging mechanism when raw materials are fed, the raw materials enter the first row of first-stage cyclones and the second row of first-stage cyclones respectively, the lower end of the first row of first-stage cyclones is respectively communicated with the first row of first-stage rising pipelines and the second row of first-stage rising pipelines through the distributing mechanism, the raw materials can be directly fed into the first row of preheaters and the second row of preheaters through the feeding mechanism, the raw materials fed into the first row of preheaters and the second row of preheaters can be regulated through the distributing mechanism, parameters such as outlet temperatures, waste gases, pressures and the like of the two rows of preheaters tend to be balanced, the working conditions are stabilized, the heat exchange efficiency is improved, energy is saved, and consumption is reduced.

Inventors

HE MINGHAI
TAO CONGXI
LIANG QIAN
WANG MING
WANG HAO
SHEN XUHUI
JIANG WENWEI
LI WEI

Assignees

华润水泥技术研发（广西）有限公司

Dates

Publication Date: 20260508
Application Date: 20250529

Claims (10)

1. The preheating and pre-decomposing system is characterized by comprising a feeding mechanism, a discharging mechanism, a distributing mechanism, a first row of preheaters and a second row of preheaters; the first row of preheaters comprises a first row of first-stage cyclones, a first row of second-stage cyclones, a first row of third-stage cyclones, a first row of fourth-stage cyclones and a first row of fifth-stage cyclones which are sequentially arranged from top to bottom; The first-row first-stage cyclone cylinder is communicated with the first-row second-stage cyclone cylinder through a first-row first-stage ascending pipeline, the first-row second-stage cyclone cylinder is communicated with the first-row third-stage cyclone cylinder through a first-row second-stage ascending pipeline, the first-row third-stage cyclone cylinder is communicated with the first-row fourth-stage cyclone cylinder through a first-row third-stage ascending pipeline, and the first-row fourth-stage cyclone cylinder is communicated with the first-row fifth-stage cyclone cylinder through a first-row fourth-stage ascending pipeline; The second row of preheaters comprises a second row of first-stage cyclones, a second row of second-stage cyclones, a second row of third-stage cyclones, a second row of fourth-stage cyclones and a second row of fifth-stage cyclones which are sequentially arranged from top to bottom; The second-row first-stage cyclone cylinder is communicated with the second-row second-stage cyclone cylinder through a second-row first-stage rising pipeline, the second-row second-stage cyclone cylinder is communicated with the second-row third-stage cyclone cylinder through a second-row second-stage rising pipeline, the second-row third-stage cyclone cylinder is communicated with the second-row fourth-stage cyclone cylinder through a second-row third-stage rising pipeline, and the second-row fourth-stage cyclone cylinder is communicated with the second-row fifth-stage cyclone cylinder through a second-row fourth-stage rising pipeline; The feeding mechanism is respectively communicated with the first-row first-stage rising pipeline and the second-row first-stage rising pipeline through a discharging mechanism, the lower end of the first-row first-stage cyclone is communicated with the distributing mechanism, and the distributing mechanism is respectively communicated with the first-row first-stage rising pipeline and the second-row first-stage rising pipeline through a material pipe.
2. The pre-heating pre-decomposition system of claim 1, wherein said second array of primary cyclones comprises a first barrel and a second barrel; the first cylinder body is communicated with the second row of second-stage cyclones through a second row of first-stage rising pipelines; The lower end of the first cylinder is communicated with the first-row second-level ascending pipeline through a material pipe, and the lower end of the second cylinder is communicated with the second-row second-level ascending pipeline through a material pipe.
3. The pre-heating pre-decomposition system according to claim 2, wherein a three-way material dividing valve is arranged on a material pipe between the lower end of the first cylinder and the first row of second-stage ascending pipelines, and the three-way material dividing valve is provided with a first interface, a second interface and a third interface; The first row of the second-stage ascending pipelines are provided with a first feeding hole and a second feeding hole, the first interface is communicated with the material pipe, the second interface is communicated with the first feeding hole, the third interface is communicated with the second feeding hole, and/or, A three-way material distributing valve is arranged on a material pipe between the lower end of the second cylinder body and the second-row second-level ascending pipeline, and the three-way material distributing valve is provided with a first interface, a second interface and a third interface; the second-row second-level rising pipeline is provided with a first feeding port and a second feeding port, the first port is communicated with the material pipe, the second port is communicated with the first feeding port, and the third port is communicated with the second feeding port.
4. A pre-heating pre-decomposition system according to claim 3, wherein said first feed inlet is higher than said second feed inlet.
5. The pre-heating and pre-decomposition system according to claim 3, wherein the first row of secondary rising pipelines comprise a resistance-reducing layer, a pouring layer and a heat insulation layer which are sequentially arranged from inside to outside, and/or the second row of secondary rising pipelines comprise a resistance-reducing layer, a pouring layer and a heat insulation layer which are sequentially arranged from inside to outside.
6. The pre-heating and pre-decomposition system according to claim 3, wherein said first series of secondary rising pipes comprises a pipe body and a top cover, said pipe body being vertically disposed with an interior forming a cavity; The top cover and the upper end of the pipe body form a first opening communicated with the cavity, and the lower end of the pipe body forms a second opening, wherein the top cover comprises a first plate body, a second plate body and a third plate body; The first plate body is horizontally arranged, one end of the second plate body is connected with the first plate body, the other end of the second plate body is connected with one end of the third plate body, the other end of the third plate body is connected with the upper end of the pipe body, and the second plate body and the third plate body are obliquely arranged downwards relative to the first plate body.
7. The pre-heating and pre-decomposition system according to claim 3, wherein said second row of secondary rising pipes comprises a pipe body and a top cover, said pipe body being vertically disposed with a cavity formed therein; The top cover and the upper end of the pipe body form a first opening communicated with the cavity, and the lower end of the pipe body forms a second opening, wherein the top cover comprises a first plate body, a second plate body and a third plate body; The first plate body is horizontally arranged, one end of the second plate body is connected with the first plate body, the other end of the second plate body is connected with one end of the third plate body, the other end of the third plate body is connected with the upper end of the pipe body, and the second plate body and the third plate body are obliquely arranged downwards relative to the first plate body.
8. The pre-heating pre-decomposition system of any of claims 1 to 7, wherein said feed mechanism comprises a housing and a baffle; The shell comprises a first pipe section, a second pipe section and a main pipe section, wherein a main channel is formed in the main pipe section, a first channel is formed in the first pipe section, and a second channel is formed in the second pipe section; The first channel and the second channel are respectively communicated with the total channel, the baffle is rotationally arranged at the joint of the first channel and the second channel, and the baffle can be rotated to adjust the opening degrees of the first channel and the second channel communicated with the total channel.
9. The pre-heating pre-decomposition system of claim 8, wherein an opening is provided on a side wall of said first pipe section, and one end of said second pipe section is connected to said opening; The lower end of the baffle is connected with the inner wall of the lower side of the opening, and a first shielding part and a second shielding part are formed on the lower side of the main pipe section; When the baffle rotates to a first limit position, the first channel is communicated with the total channel, and the other end of the baffle is positioned at the lower side of the first shielding part; When the baffle rotates to a second limit position, the second channel is communicated with the total channel, and the other end of the baffle is positioned at the lower side of the second shielding part.
10. The pre-heating pre-decomposition system of claim 9, wherein said first shielding portion is an inner wall of an upper side of said opening; The outer wall of the main pipe section is connected with the inner wall of the first pipe section, and the lower end of the main pipe section forms the second shielding part.

Description

Pre-heating and pre-decomposing system Technical Field The utility model relates to the technical field of cement preparation, in particular to a preheating and pre-decomposing system. Background At present, cement enterprises largely adopt a five-stage suspension preheating pre-decomposition system to carry out cement clinker to the left. In the new dry cement clinker manufacturing process, the raw materials need to be subjected to suspension and separation processes in a preheater and a decomposing furnace before entering the rotary kiln, so that dehydration and preheating of the raw materials and decomposition of calcium carbonate are realized, and finally the raw materials enter the rotary kiln for calcination. The prior five-stage double-channel preheating and pre-decomposing system comprises two rows of five-stage preheaters, wherein each row of five-stage preheaters comprises five cyclones sequentially arranged from top to bottom, each first row of five-stage preheaters comprises a first row of one-stage cyclones, a first row of two-stage cyclones, a first row of three-stage cyclones, a first row of four-stage cyclones and a first row of five-stage cyclones sequentially arranged from top to bottom, each second row of five-stage preheaters comprises a second row of one-stage cyclones, a second row of two-stage cyclones, a second row of three-stage cyclones, a second row of four-stage cyclones and a second row of five-stage cyclones sequentially arranged from top to bottom, each second row of one-stage cyclones comprises a first barrel and a second barrel, a rising pipeline is connected between every two adjacent cyclones, and the lower end of each first row of one-stage cyclone is communicated with the rising pipeline of the next stage. At present, when the preheaters are fed, raw materials respectively enter the ascending pipelines at the uppermost sides of the two rows of preheaters through feeders, however, the feeding proportion of the existing raw material feeding mode for the two rows of preheaters is fixed, and as the feeding temperature of each row of kiln raw materials, the feeding temperature of the cyclone barrel and the feeding temperature of the uppermost cyclone barrel are possibly inconsistent, obvious deviation of the exhaust gas quantity and the temperature of the two rows of preheaters is caused, and the solid-gas ratio of the two rows of preheaters is different and influences the heat exchange effect. Disclosure of utility model The utility model solves the technical problems that when the prior preheating and pre-decomposing system is used for feeding raw materials, the proportion of the material quantity distributed to the two paths of preheaters is fixed, but the environmental parameters of each row can be different, so that obvious deviation occurs between the outlet exhaust gas quantity and the temperature of the two rows of preheaters, the solid-gas ratio of the two rows of preheaters is different, and the heat exchange effect is influenced. (II) technical scheme In order to solve the technical problems, an embodiment of one aspect of the utility model provides a preheating and pre-decomposing system, which comprises a feeding mechanism, a discharging mechanism, a distributing mechanism, a first row of preheaters and a second row of preheaters; the first row of preheaters comprises a first row of first-stage cyclones, a first row of second-stage cyclones, a first row of third-stage cyclones, a first row of fourth-stage cyclones and a first row of fifth-stage cyclones which are sequentially arranged from top to bottom; The first-row first-stage cyclone cylinder is communicated with the first-row second-stage cyclone cylinder through a first-row first-stage ascending pipeline, the first-row second-stage cyclone cylinder is communicated with the first-row third-stage cyclone cylinder through a second-row second-stage ascending pipeline, the first-row third-stage cyclone cylinder is communicated with the first-row fourth-stage cyclone cylinder through a first-row third-stage ascending pipeline, and the first-row fourth-stage cyclone cylinder is communicated with the first-row fifth-stage cyclone cylinder through a first-row fourth-stage ascending pipeline; The second row of preheaters comprises a second row of first-stage cyclones, a second row of second-stage cyclones, a second row of third-stage cyclones, a second row of fourth-stage cyclones and a second row of fifth-stage cyclones which are sequentially arranged from top to bottom; The second-row first-stage cyclone cylinder is communicated with the second-row second-stage cyclone cylinder through a second-row first-stage rising pipeline, the second-row second-stage cyclone cylinder is communicated with the second-row third-stage cyclone cylinder through a second-row second-stage rising pipeline, the second-row third-stage cyclone cylinder is communicated with the second-row fourth-stage cyclone cylinder through a second-row t