CN213396490U

CN213396490U - Rotary kiln barrel heat recovery device

Info

Publication number: CN213396490U
Application number: CN202022392227.9U
Authority: CN
Inventors: 韩正琦; 胡安阳; 陈学晋; 李大伟; 李德闻; 葛星; 王华金
Original assignee: China United Cement Zaozhuang Co ltd
Current assignee: China United Cement Zaozhuang Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-06-08
Anticipated expiration: 2030-10-22

Abstract

The utility model provides a rotary kiln barrel heat reclamation device mainly relates to rotary kiln waste heat recovery technical field. Rotary kiln barrel heat recovery unit, including heat recovery sleeve, heat recovery sleeve includes casing, lower casing, it is semi-circular with lower casing cross-section to go up the casing, go up the through setting water pipe on the casing, it sets up the air exhauster to go up the casing top, the air exhauster top sets up the steam pipe, the internal bottom of inferior valve sets up the energy-absorbing plate, water pipe one side in the heat recovery sleeve sets up atomizer, go up casing and casing both sides middle part installation bearing respectively down, the heat recovery sleeve passes through the bearing and rotates the connection rotary kiln barrel. The beneficial effects of the utility model reside in that: the utility model can effectively prevent the occurrence of the condition of excessive heat recovery, and achieve the purposes of energy conservation and emission reduction; the device has simple structure, and the upper shell and the lower shell are installed by adopting bolts so as to be convenient to install, use, disassemble and maintain.

Description

Rotary kiln barrel heat recovery device

Technical Field

The utility model mainly relates to a rotary kiln waste heat recovery technical field specifically is a rotary kiln barrel heat reclamation device.

Background

The rotary kiln is a rotary calcining kiln (commonly called rotary kiln) and belongs to building material equipment. The rotary kiln can be divided into a cement rotary kiln, a metallurgical chemical kiln and a lime kiln according to different materials to be treated. The cement industry is always a high-energy-consumption and high-pollution industry, so that the traditional cement rotary kiln has great energy-saving potential. In the cement production process, the wall surface of the rotary kiln cylinder is about 300 ℃, the kiln cylinder with the diameter of 4m and the length of 60m is taken as an example of a clinker production line with the capacity of 5000t/t/d, the recoverable radiant energy is about 5MW, the quantity is considerable, the heat can be supplied for life in a plant area, the heating load of partial office facilities can be provided, even low-pressure saturated steam is generated, and the steam can be used as steam turbine steam supplement of a cement kiln pure low-temperature waste heat power generation system to generate power, so that the power generation capacity of the system is further improved, and the production energy consumption is reduced.

The rotary cement kiln can generate a large amount of waste heat in the cement calcining process, the thermal efficiency is only 30-50%, huge energy waste exists, the energy lost through the surface of the rotary cement kiln accounts for about 11.96% of the total energy consumption, a large fan is adopted in some factories to cool the kiln body, high-temperature pollution and energy waste are caused, a large amount of heat is often lost in the cement producing process of the rotary cement kiln, and the requirements of the national energy-saving and emission-reducing policy cannot be met; some existing rotary kiln cylinder heat recovery devices adopt air as a medium or a device for absorbing heat radiation to recover heat, and the mode cannot well recover the heat; some liquid with higher specific heat capacity is used as a heat conducting agent to radiate heat for the rotary kiln, and although the mode can better recover the heat on the surface of the cylinder, the problem that the heat recovery amount is difficult to control exists at the same time. For example, excessive heat recovery causes the temperature in the rotary kiln to decrease, and more raw materials need to be burned for heating in order to reach the normal working temperature of the rotary kiln, which is not beneficial to saving fuel and controlling production cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a rotary kiln barrel heat recovery device, which can uniformly spray high-pressure water in a water pipe to the surface of a rotary kiln barrel through an atomizing nozzle, so that the high-temperature rotary kiln barrel can quickly vaporize atomized water into steam, and the heat on the surface of the barrel is recovered and further utilized; the rate of heat recovery can be adjusted by adjusting the water spraying speed by adjusting the water pressure, so that the situation of excessive heat recovery can be effectively prevented, and the purposes of energy conservation and emission reduction are achieved; the device has simple structure, and the upper shell and the lower shell are installed by adopting bolts so as to be convenient to install, use, disassemble and maintain.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

the utility model provides a rotary kiln barrel heat reclamation device, includes the heat reclamation sleeve, the heat reclamation sleeve includes casing, lower casing, it is semi-circular with lower casing cross-section to go up the casing, go up the through-type on the casing and set up the water pipe, it sets up the air exhauster to go up the casing top, the air exhauster top sets up the steam pipe, the internal bottom of inferior valve sets up the energy-absorbing plate, water pipe one side in the heat reclamation sleeve sets up atomizer, go up casing and casing both sides middle part down and install the bearing respectively, the heat reclamation sleeve passes through the bearing and rotates and connect the rotary kiln barrel.

The energy absorption plate is coated with deep color paint capable of absorbing radiant heat.

The lower end of the upper shell is provided with a connecting plate, the upper end of the lower shell is provided with a connecting plate, the upper shell is fixedly connected with the lower shell through the connecting plate, and the connecting plate is fixedly connected with the ground through a support.

Two groups of exhaust fans and two groups of steam pipes are arranged above the upper shell.

The water pipe is provided with two in last casing symmetry, water pipe one side is equidistant to be set up atomizer a plurality of in the heat recovery sleeve, atomizer the central axis passes heat recovery sleeve's the central axis.

Contrast prior art, the beneficial effects of the utility model are that:

the rotary kiln can uniformly spray high-pressure water in the water pipe to the surface of the rotary kiln barrel through the atomizing nozzle, the high-temperature rotary kiln barrel can quickly vaporize atomized water into steam, and the heat on the surface of the barrel is recovered and further utilized; the rate of heat recovery can be adjusted by adjusting the water spraying speed by adjusting the water pressure, so that the situation of excessive heat recovery can be effectively prevented, and the purposes of energy conservation and emission reduction are achieved; the device has simple structure, and the upper shell and the lower shell are installed by adopting bolts so as to be convenient to install, use, disassemble and maintain.

Drawings

Fig. 1 is a schematic view of a first view structure of the present invention;

fig. 2 is a schematic view of a second perspective structure of the present invention;

FIG. 3 is a right side view schematic structure of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure A-A of the present invention;

figure 5 is a schematic structural view when the utility model is installed on a rotary kiln cylinder.

Reference numerals shown in the drawings: 1. a heat recovery sleeve; 11. an upper housing; 12. a lower housing; 13. a water pipe; 14. an exhaust fan; 15. a steam pipe; 16. an energy absorbing plate; 17. an atomizing spray head; 18. a bearing; 121. a connecting plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

Combine accompanying figure 1-5, a rotary kiln barrel heat reclamation device, including heat recovery sleeve 1, heat recovery sleeve 1 includes casing 11, casing 12 down, it is semi-circular with casing 12 cross-section down to go up casing 11, it is equipped with water pipe 13 to go up the through-type on the casing 11, go up casing 11 top fixed mounting air exhauster 14, steam pipe 15 is connected to air exhauster 14 top, the bottom covers and is equipped with energy-absorbing plate 16 in casing 12 down, water pipe 13 one side fixed connection atomizer 17 in the heat recovery sleeve 1, go up casing 11 and casing 12 both sides middle part down and install bearing 18 respectively, heat recovery sleeve 1 rotates through bearing 18 and connects the rotary kiln barrel. The steam pipe is connected with the heat exchanger and is used for generating electricity, supplying heat to a plant area, supplying hot water to a bathroom and the like.

The energy absorbing plate 16 is coated with a dark paint capable of absorbing radiant heat.

The lower end of the upper shell 11 and the upper end of the lower shell 12 are both provided with a connecting plate 121, the upper shell 11 and the lower shell 12 are fixedly connected together through the connecting plate 121 by using bolts, and the connecting plate 121 is fixedly connected to the ground through a support matched with the connecting plate 121.

Two sets of suction fans 14 and steam pipes 15 are provided above the upper housing 11. The quantity of the exhaust fans and the steam pipes can be properly adjusted according to the quantity of heat to be recovered by the rotary kiln.

The water pipe 13 is provided with two in last casing 11 symmetry, water pipe 13 one side equidistant atomizer 17 that sets up in heat recovery sleeve 1 is a plurality of, atomizer 17 the central axis that heat recovery sleeve 1 was worn to the central axis. The number of the atomizing nozzles is correspondingly set according to the length of the heat recovery sleeve, and the length of the heat recovery sleeve is determined according to the length of the rotary kiln cylinder required to be installed in each section.

When the device is used, high-pressure water is introduced into the water pipe, and the high-pressure water atomizes the water through the atomizing nozzle and sprays the atomized water onto the surface of the rotary kiln cylinder. Because rotary kiln surface temperature is higher, most atomizing water can absorb a large amount of heats and vaporize to steam in the twinkling of an eye, and the water becomes the increase of volume behind the steam, and the internal gas pressure of heat recovery sleeve risees, and under the auxiliary action of air exhauster, steam gets into the steam pipe fast, and then gets into the indirect heating equipment of follow-up connection with heat rational utilization. The water which is sprayed to the surface of the rotary kiln cylinder body through the atomizing nozzle and cannot be vaporized in time can flow to the bottom of the lower shell in the heat recovery sleeve, the energy absorption plate positioned at the bottom of the lower shell absorbs the high-temperature radiation energy on the surface of the rotary kiln cylinder body, the temperature of the energy absorption plate rises, the water at the bottom of the lower shell is heated into steam, and then the heat is taken away through the steam pipe. The device can adjust the water quantity sprayed into the heat recovery sleeve by adjusting the pressure of high-pressure water in the water pipe, and further can adjust the heat recovery rate of the surface of the rotary kiln cylinder. A sensor for monitoring temperature is arranged in the rotary kiln, and proper heat recovery rate is properly adjusted according to the temperature in the rotary kiln, so that the excessive heat on the surface of the rotary kiln cylinder is timely recovered and utilized on the basis of ensuring the normal work of the rotary kiln.

Claims

1. The utility model provides a rotary kiln barrel heat reclamation device, includes heat recovery sleeve (1), its characterized in that: heat recovery sleeve (1) is including last casing (11), casing (12) down, it is semi-circular to go up casing (11) and casing (12) cross-section down, go up through setting up water pipe (13) on casing (11), it sets up air exhauster (14) to go up casing (11) top, air exhauster (14) top sets up steam pipe (15), the bottom sets up energy-absorbing plate (16) down in casing (12), water pipe (13) one side in heat recovery sleeve (1) sets up atomizer (17), go up casing (11) and casing (12) both sides middle part installation bearing (18) respectively down, heat recovery sleeve (1) rotates through bearing (18) and connects the rotary kiln barrel.

2. The rotary kiln barrel heat recovery device as claimed in claim 1, wherein: the energy absorption plate (16) is coated with deep color paint capable of absorbing radiant heat.

3. The rotary kiln barrel heat recovery device as claimed in claim 1, wherein: the lower end of the upper shell (11) is provided with a connecting plate (121) which is arranged at the upper end of the lower shell (12), the upper shell (11) and the lower shell (12) are fixedly connected together by the connecting plate (121), and the connecting plate (121) is fixedly connected to the ground through a support.

4. The rotary kiln barrel heat recovery device as claimed in claim 1, wherein: two groups of exhaust fans (14) and steam pipes (15) are arranged above the upper shell (11).

5. The rotary kiln barrel heat recovery device as claimed in claim 1, wherein: the water pipe (13) is symmetrically arranged in the upper shell (11), the atomizing nozzles (17) are arranged on one side of the water pipe (13) in the heat recovery sleeve (1) at equal intervals, and the central axis of the atomizing nozzles (17) penetrates through the central axis of the heat recovery sleeve (1).