CN114812159A

CN114812159A - Vertical cooler for rotary cement kiln to calcine clinker

Info

Publication number: CN114812159A
Application number: CN202210448340.5A
Authority: CN
Inventors: 王成河; 王巍巍
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-07-29

Abstract

The invention provides a vertical cooler for calcining clinker in a rotary cement kiln, which comprises a vertical cooling shell, a kiln door, an air-cooled heat exchange chamber, a grate, a central ventilation opening, a suspension cooling chamber, a Roots blower, a discharge pipe, clinker conveying equipment and a tertiary air duct, wherein a tertiary air intake is arranged at the upper part of the vertical cooling shell; a heat exchange chamber for materials and cooling air is arranged in the middle of the inner side of the vertical cooling shell; the middle lower part of the vertical cooling shell is provided with a rotary grate. The invention utilizes the fan to blow air into the suspension cooling chamber through the pipeline. The air current is by supreme down, and the material is from top to bottom free fall, the heat transfer with by the reverse operation of heat transfer, the material thing is lower more down the temperature, the opposite air current is higher more up the temperature, the fan can utilize the comb cavity down to make the grog suspend quick cooling here for a short time when upwards blowing, has improved heat transfer effect and cooling effect simultaneously, can make the material thing slow down the slew velocity under the effect of powerful air current moreover, improves the cooling effect.

Description

Vertical cooler for rotary cement kiln to calcine clinker

Technical Field

The invention belongs to a major technical invention in the technical field of cement clinker calcining and cooling machines, and particularly relates to a vertical cooling machine used for calcining clinker in a rotary cement kiln, which is a subversive technical revolution.

Background

The energy consumption in the production process of the dry-method cement calcined clinker accounts for a large proportion of the production cost, and exceeds 1/3; clinker cooling is an indispensable process link in the manufacturing process of cement clinker, and energy consumption and heat recovery in clinker cooling are important for high-efficiency and energy-saving dry-process cement clinker calcination.

However, the push type grate cooler used for calcining the clinker in the existing rotary cement kiln has the problems of poor cooling effect, low heat recovery and high energy consumption.

Therefore, the invention of the vertical cooler for calcining the clinker in the rotary cement kiln greatly improves the utilization rate of heat consumption, and is very necessary.

Disclosure of Invention

In order to solve the technical problems, the invention provides a vertical cooler for calcining clinker in a rotary cement kiln, which aims to solve the problem of poor cooling effect of a grate cooler for calcining clinker in the conventional rotary cement kiln. A vertical cooler used for calcining clinker in a rotary cement kiln comprises a vertical cooler shell, a kiln door, an air-cooled heat exchange chamber, a rotary grate, a central ventilation opening, a suspension cooling chamber, a high-pressure fan, a discharge pipe, clinker conveying equipment, a tertiary air duct, a rotary kiln opening and a heat recovery chamber, wherein the air-cooled heat exchange chamber is arranged in the middle of the inner side of the vertical cooler; the middle lower part of the shell of the vertical cooler is provided with a rotary grate; the upper part of the rotating grate is provided with a central ventilation opening; a discharge pipe is arranged at the lower part of the vertical cooling shell; clinker conveying equipment is arranged below the discharge pipe; and a tertiary air pipe is arranged at the upper part of the front side of the vertical cooling shell.

Preferably, the materials in the air-cooled heat exchange chamber move in the opposite direction to the air, so that the materials are thick and the heat exchange effect is good.

Preferably, the suspension cooling chamber exchanges heat with extremely low air-fuel ratio, and the heat exchange effect is good.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, the fan is a high-pressure fan and can penetrate through a material layer with the thickness of more than 4 m. The high-pressure fan blows air into the suspension cooling chamber through the pipeline, the air flow blows from bottom to top and penetrates through the grate to exchange heat with the clinker, the lower the temperature of the clinker is, on the contrary, the higher the temperature of the air flow is, a clinker material layer with the thickness of more than 4m is added under the action of reverse motion, so that the heat exchange of the clinker is good, the cooling temperature of the clinker is low, the air temperature after heat exchange can be close to the temperature of the clinker discharged from the kiln, and the heat can be completely recovered. The heat consumption of the clinker is greatly reduced.

2. Compared with the existing push type grate cooler, the equipment (vertical cooler) provided by the invention has the advantages of low investment, good heat recovery effect, high equipment operation rate and low operation cost.

3. Compared with the existing push type grate cooler, the equipment (vertical cooler) has the advantages that the coal consumption is low, the heat efficiency is high, and the recovered hot air is completely fed into the kiln, so that the coal consumption and the power consumption for sintering the ton clinker are low.

Drawings

FIG. 1 is a schematic diagram of the present invention.

In the figure:

1. a vertical cooling housing; 2. a kiln door; 3. an air cooling chamber; 4. rotating the grate; 5. a central vent; 6. a suspension cooling chamber; 7. a high pressure fan; 8. a discharging pipe; 9. a clinker conveying device; 10. a tertiary air pipe; 11. a kiln opening of the rotary kiln; 12. a heat recovery chamber.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example (b):

as shown in the attached figure 1, the invention provides a vertical cooler for calcining clinker in a rotary cement kiln, which comprises a vertical cooler shell 1, a kiln door 2, an air-cooled heat exchange chamber 3, a rotary grate 4, a central ventilation opening 5, a suspension cooling chamber 6, a high-pressure fan 7, a discharge pipe 8, clinker conveying equipment 9, a tertiary air duct 10, a rotary kiln opening 11 and a heat recovery chamber 12, wherein a tertiary air intake opening, namely the tertiary air duct 2, is arranged at the upper part of the vertical cooler shell 1; the middle position of the inner side of the vertical cooling shell 1 is provided with a heat exchange chamber 3, and the upper part is provided with a hot air recovery chamber 12; the middle lower part of the vertical cooling shell 1 is provided with a rotary grate 4; the upper part of the rotating grate 4 is provided with a central ventilation opening 5; the lower part of the inner side of the vertical cooler shell 1 is fixedly connected with a suspension cooling chamber 6; the high-pressure fans 7 are arranged on two sides of the vertical cooling shell 1; a discharge pipe 8 is arranged at the lower part of the vertical cooling shell 1; a clinker conveying device 9 is arranged below the discharge pipe 8; and a tertiary air pipe 10 is arranged at the upper part of the vertical cooling shell 1.

Principle of operation

In the working process of the invention, clinker falls into the air cooling chamber 3 at the lower part of the heat recovery chamber 12 through the kiln mouth 11 of the rotary kiln, namely the clinker cooling chamber, and exchanges heat with cooling air blown up from the lower part, because the thickness of the clinker layer exceeds 4m, the heat exchange time is improved by more than 4 times compared with the original pushing type grate cooler, the cooling air quantity below 4 times is reduced, the clinker is in stacking motion, the cooling air blown up from the lower part has slow wind speed, long cooling time and good cooling effect; clinker continuously runs downwards and is forced to be crushed by the rotating grate under the influence of the gravity of the material, and fine particles after crushing pass through the grate holes of the rotating grate to fall into the suspension cooling chamber 6, and the clinker is taken away by clinker conveying equipment through the discharge pipe 8 after continuously exchanging heat with normal-temperature air; the normal temperature wind blown by the high pressure fan 7 and the clinker with lower temperature exchange heat in the suspension cooling chamber 6 with large wind-material ratio, so that the low temperature heat exchange effect of the clinker is ensured, and the heat of the low temperature clinker can be effectively recovered. When cold air blown by a high-pressure fan exchanges heat in the suspension heat exchange chamber, the temperature of cooling air begins to rise, after the cold air passes through the rotary grate 4, the cold air begins to exchange heat with clinker in the cooling chamber, the cooling air continues to go upwards, when the cold air leaves a clinker layer in the heat exchange chamber, the low-temperature air cools the low-temperature clinker and the air at higher temperature cools the high-temperature clinker due to the fact that the heat exchange time is long and the air and the clinker move in opposite directions, the temperature of the cooling air at the moment is exchanged heat to be more than 1300 ℃, the cooling air is utilized by secondary air passing through the kiln at the kiln opening, and the rest part rises to a tertiary air duct to enter the decomposing furnace and is utilized by the decomposing furnace.

The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.

Claims

1. The vertical cooler for the rotary cement kiln to calcine the clinker is characterized by comprising a vertical cooler shell (1), a kiln door (2), an air-cooled heat exchange chamber (3), a rotary grate (4), a central ventilation opening (5), a suspension cooling chamber (6), a high-pressure fan (7), a discharge pipe (8), clinker conveying equipment (9), a tertiary air duct (10), a rotary kiln opening (11) and a heat recovery chamber (12), wherein a tertiary air intake opening, namely the tertiary air duct (10), is arranged at the upper part of the vertical cooler shell (1); a heat exchange chamber (3) is arranged in the middle of the inner side of the vertical cooler shell (1), and a hot air recovery chamber (12) is arranged at the upper part of the vertical cooler shell; the middle lower part of the vertical cooler shell (1) is provided with a rotary grate (4); the upper part of the grate (4) is provided with a central ventilation opening (5); the lower part of the inner side of the vertical cooler shell (1) is fixedly connected with a suspension cooling chamber (6); high-pressure fans (7) are arranged on two sides of the vertical cooling outer shell (1); a discharge pipe (8) is arranged at the lower part of the vertical cooler shell (1); a clinker conveying device (9) is arranged below the discharge pipe (8); and a rotary kiln mouth hole (11) is arranged at the upper part of the vertical cooler shell (1).

2. The vertical cooler for use in the rotary cement kiln for calcining clinker as claimed in claim 1, wherein: the heat exchange mode in the air-cooled heat exchange chamber (5) is that air and materials run reversely.

3. The vertical cooler for use in the rotary cement kiln for calcining clinker as claimed in claim 1, wherein: the suspension cooling chamber (6) exchanges heat with an extremely low air-fuel ratio.

4. The vertical cooler for use in the rotary cement kiln for calcining clinker as claimed in claim 1, wherein: the heat recovery chamber (12) recovers all heat and enters the rotary kiln system through secondary air and tertiary air.