CN215027535U - Compound desulphurization unit of hot raw material - Google Patents

Abstract

The utility model discloses a compound desulphurization unit of hot raw material, including dore furnace, smoke chamber, one-level pre-heater, second grade pre-heater and tertiary tuber pipe, be equipped with the hot-blast main who takes the mouth of spouting on the tertiary tuber pipe between tertiary air valve and the dore furnace, hot-blast main installs the regulation air valve with the junction of tertiary tuber pipe, and hot-blast main's lower part is equipped with hot raw material import and desulfurizer import respectively, hot-blast main's top is equipped with first discharge port and second discharge port, be equipped with the branch material valve on the pipeline that second grade pre-heater and dore furnace are connected, a discharge gate and the dore furnace of branch material valve are connected, the hot raw material access connection on another discharge gate and the hot-blast main. The utility model discloses can effectively avoid skinning and exhaust pollution to be favorable to cement production system's stability.

Description

Compound desulphurization unit of hot raw material

Technical Field

The utility model belongs to the technical field of cement manufacture, concretely relates to compound desulphurization unit of hot raw material.

Background

At present, the main desulfurization technologies in cement plants are wet desulfurization and dry desulfurization. The most common wet desulphurization technology is limestone/gypsum method, the desulphurization efficiency is as high as 90%, but the desulphurization process and equipment are complicated, the corrosion of downstream equipment is easy to cause, the operation and maintenance cost is high, and secondary pollution exists. The dry desulfurization is mainly a hot raw material desulfurization technology, which is divided into two types, one is that hot air containing calcium oxide is extracted from an outlet of a decomposing furnace, a hot air pipeline of the hot air pipeline is connected with an outlet pipeline of a first-stage preheater, and the other is that hot raw material is obtained through a feeding pipe of a fifth-stage preheater and then is put into a special desulfurization device or is directly put into a kiln lifter to be doped with the raw material.

The wind point of getting of hot raw material desulfurization technique is the dore furnace export, not only contains the calcium oxide in the hot-blast of extraction this moment, still contains the buggy that can not burn out, and the buggy continues to burn in the wind pipeline and easily causes the skinning of pipeline to block up, and then influences the desulfurization effect, contains a large amount of nitrogen oxide in the flue gas of dore furnace simultaneously, is cleared up and is extracted without the denitrifier, can cause nitrogen oxide's phenomenon that exceeds standard, if the wind pipeline adds denitrifiers such as aqueous ammonia and clears up nitrogen oxide then can cause ammonia escape to exceed standard. Moreover, the air intake mode of the hot raw material desulfurization can cause uncontrollable air quantity and material quantity, and the combustion condition of the decomposing furnace can also cause the instability of a thermal regulation due to the wind-fighting effect of the air intake pipeline.

Disclosure of Invention

The utility model aims to solve the technical problem that the not enough to above-mentioned prior art provides a compound desulphurization unit of hot raw material, and it can eliminate hot-blast main pipe's skinning phenomenon to improve cement production system's stability.

The utility model adopts the technical proposal that: a composite desulfurizing device for the hot raw material is composed of a decomposing furnace, a smoke chamber, a primary preheater, a secondary preheater and a tertiary air pipe connected to said decomposing furnace and with a tertiary air valve, a primary preheater connected to the outlet of said decomposing furnace, a secondary preheater connected to said smoke chamber and with an air outlet, a secondary preheater connected to said decomposing furnace and with an air outlet, a hot air pipeline with a spray opening between said tertiary air valve and decomposing furnace, an air regulating valve installed at the joint of hot air pipeline and tertiary air pipe, a hot raw material inlet and a desulfurizing agent inlet, a first and a second outlets at the top of hot air pipeline, a distributing valve on the pipeline between secondary preheater and decomposing furnace, and a discharge outlet connected to decomposing furnace, the other discharge port is connected with a hot raw material inlet on the hot air pipeline.

Preferably, the pipelines of the material distributing valve, the decomposing furnace and the hot air pipeline are all provided with flow regulating valves.

Preferably, the first discharge port is communicated with the main flue, and the second discharge port is communicated with the outlet of the high-temperature fan or the humidifying tower.

The utility model adopts a hot raw material desulphurization technology, the wind taking point and the material taking point are different from other hot raw material desulphurization technologies, thereby avoiding the skinning phenomenon caused by the unburnt coal dust particles in the materials, and simultaneously, the wind does not contain combustion waste gas, thereby avoiding the emission phenomenon of other pollutants without treatment; and the utility model discloses a desulfurization system is relatively independent with the decomposing furnace combustion system, and wind and material all can be regulated and control, and is less to cement manufacture thermal technology system's influence, is favorable to cement manufacture system's stability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a decomposing furnace; 2. a smoking chamber; 3. a primary preheater; 4. a secondary preheater; 5. a tertiary air pipe; 6. a tertiary air valve; 7. a hot air duct; 8. adjusting an air valve; 9. a hot raw material inlet; 10. a desulfurizer inlet; 11. a first discharge port; 12. a second discharge port; 13. a material distributing valve; 14. a flow regulating valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Examples

As shown in fig. 1, the hot raw material compound desulfurization device provided in this embodiment includes a decomposing furnace 1, a smoke chamber 2, a primary preheater 3, a secondary preheater 4 and a tertiary air duct 5, the tertiary air duct 5 is connected to the decomposing furnace 1, a tertiary air valve 6 is provided on the tertiary air duct 5, an outlet of the decomposing furnace 1 is connected to the primary preheater 3, a discharge port of the primary preheater 3 is communicated to the smoke chamber 2, an air outlet is connected to the secondary preheater 4, a discharge port of the secondary preheater 4 is connected to the decomposing furnace 1, a hot air duct 7 with a spouting port is provided between the tertiary air valve 6 and the decomposing furnace 1 on the tertiary air duct 5, an adjusting air valve 8 is installed at a connection between the hot air duct 7 and the tertiary air duct 5, a hot raw material inlet 9 and a desulfurizing agent inlet 10 are provided at a lower portion of the hot air duct 7, a first discharge port 11 and a second discharge port 12 are provided at a top portion of the hot air duct 7, the first discharge port 11 is communicated with a main flue, the second discharge port 12 is communicated with a high-temperature fan outlet or a humidifying tower, a material distributing valve 13 is arranged on a pipeline for connecting the secondary preheater 4 and the decomposing furnace 1, one discharge port of the material distributing valve 13 is connected with the decomposing furnace 1, and the other discharge port is connected with a hot raw material inlet 9 on the hot air pipeline 7; the pipelines of the material distributing valve 13, the decomposing furnace 1 and the hot air pipeline 7 are all provided with a flow regulating valve 14.

The hot raw material desulfurization technology of the utility model takes the air from the tertiary air pipe 5 of the cement production system, thereby avoiding the combustion waste gas in the air, and avoiding the condition that other pollutants are discharged without being processed; the hot raw meal is taken from the second-stage preheater 4 of the decomposing furnace 1 upwards, and the raw meal does not contain unburned coal dust particles, so that the phenomenon of skin formation in a pipeline cannot occur; the hot air pipeline 7 is provided with a spouting port, so that hot raw materials and hot air can be better mixed, and other desulfurizing agents can be added from the desulfurizing agent inlet 10, so that the other desulfurizing agents and the hot raw materials form composite desulfurization together.

Claims (3)

1. The utility model provides a compound desulphurization unit of hot raw material, includes dore furnace (1), smoke chamber (2), one-level pre-heater (3), second grade pre-heater (4) and tertiary tuber pipe (5), tertiary tuber pipe (5) are connected with dore furnace (1), and are equipped with tertiary air valve (6) on tertiary tuber pipe (5), the export and the one-level pre-heater (3) of dore furnace (1) are connected, and the discharge gate and smoke chamber (2) intercommunication of one-level pre-heater (3), the air outlet is connected with second grade pre-heater (4), and the discharge gate and dore furnace (1) of second grade pre-heater (4) are connected, its characterized in that: be equipped with hot-blast main (7) of taking the mouth of spouting between tertiary air valve (6) and dore (1) on tertiary tuber pipe (5), hot-blast main (7) and tertiary tuber pipe (5) junction install regulation blast valve (8), and the lower part of hot-blast main (7) is equipped with hot raw material import (9) and desulfurizer import (10) respectively, the top of hot-blast main (7) is equipped with first outlet (11) and second outlet (12), be equipped with branch material valve (13) on the pipeline that secondary preheater (4) and dore (1) are connected, a discharge gate and dore (1) of branch material valve (13) are connected, and hot raw material import (9) on another discharge gate and hot-blast main (7) are connected.

2. The hot raw meal compound desulfurization apparatus according to claim 1, characterized in that: and flow regulating valves (14) are arranged on pipelines connected with the material distributing valve (13), the decomposing furnace (1) and the hot air pipeline (7).

3. A hot raw meal complex desulfurization apparatus according to claim 1 or 2, characterized in that: the first discharge port (11) is communicated with the main flue, and the second discharge port (12) is communicated with the outlet of the high-temperature fan or the humidifying tower.

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