阅读说明：本技术 一种回转窑焚烧设备及工艺 (Rotary kiln incineration equipment and process ) 是由 徐建 王连兵 陈昌鹭 于 2021-09-27 设计创作，主要内容包括：本发明涉及一种回转窑焚烧设备,沿着焚烧物的处理顺序上依次设有焚烧储料罐、干化焚烧塔、回转窑本体、废气焚烧炉和湿法脱硫塔；焚烧储料罐与所述干化焚烧塔之间连接有螺杆泵；回转窑本体的末端设置有风机；回转窑本体和所述废气焚烧炉之间还依次设有旋风除尘器、干法脱酸塔和布袋除尘器。本发明的另一个目的在于提供一种回转窑焚烧工艺。本发明的一种回转窑焚烧设备及工艺,焚烧彻底,焚烧热能得到有效利用,简化了工艺流程。(The invention relates to rotary kiln incineration equipment, which is sequentially provided with an incineration storage tank, a drying incineration tower, a rotary kiln body, a waste gas incinerator and a wet desulphurization tower along the treatment sequence of incinerated substances; a screw pump is connected between the incineration storage tank and the drying incineration tower; the tail end of the rotary kiln body is provided with a fan; a cyclone dust collector, a dry deacidification tower and a bag-type dust collector are sequentially arranged between the rotary kiln body and the waste gas incinerator. The invention also aims to provide a rotary kiln incineration process. The rotary kiln incineration equipment and process provided by the invention have the advantages that the incineration is thorough, the incineration heat energy is effectively utilized, and the process flow is simplified.)

1. A rotary kiln incineration device is characterized in that an incineration storage tank, a drying incineration tower, a rotary kiln body, a waste gas incinerator and a wet desulphurization tower are sequentially arranged along the treatment sequence of incinerated substances;

a screw pump is connected between the incineration storage tank and the drying incineration tower;

the tail end of the rotary kiln body is provided with a fan;

and a cyclone dust collector, a dry deacidification tower and a bag-type dust collector are sequentially arranged between the rotary kiln body and the waste gas incinerator.

2. The rotary kiln incineration equipment as claimed in claim 1, wherein a combustion-supporting air preheater is provided on the bag-type dust remover.

3. The rotary kiln incineration apparatus as claimed in claim 1, wherein a burner is provided at each of front and rear ends of the rotary kiln body.

4. A rotary kiln incineration apparatus according to any one of claims 1 to 3, characterised in that the waste gas incinerator is a regenerative incinerator.

5. The rotary kiln incineration equipment as claimed in claim 1, wherein a material crushing device is arranged at the front end of the incineration storage tank.

6. The rotary kiln incineration apparatus as claimed in claim 5, wherein the material crushing device comprises a housing and a stirring device;

a waste material inlet is formed in the upper part of one side of the shell, a discharge port is formed in the bottom of the shell, and the discharge port is connected with a feeding part of the incineration storage tank through a pipeline;

the stirring device comprises a motor and a stirring shaft; the motor is fixed the top of casing, and the inside of the vertical inside that penetrates the casing downwards of output shaft of motor, the (mixing) shaft sets up in the casing, and with the output shaft fixed connection of motor, be equipped with a plurality of cutting blades along its axis direction on the (mixing) shaft.

7. A rotary kiln incineration apparatus as claimed in claim 6, characterised in that the lower part of the shell is of a resulting trumpet-like structure.

8. A rotary kiln incineration process, characterized in that waste materials are incinerated by using the rotary kiln incineration equipment as claimed in any one of claims 1 to 7.

9. The rotary kiln incineration process of claim 8, wherein the specific process is as follows,

(1) storing the crushed waste in a waste storage tank, pumping the waste to a drying incineration tower through a screw rod, reversely contacting with high-temperature flue gas in the chemical incineration tower, quickly finishing the primary drying dehydration process of sludge, and conveying the sludge into a rotary kiln body;

(2) the temperature in the rotary kiln body is controlled to be about 900 ℃, and the temperature of the smoke discharged by the drying incineration tower is 140 ℃;

(3) the flue gas enters a cyclone dust collector, most sludge particles are collected and then are sent back to the drying incineration tower through an inclined chute;

(4) flue gas discharged by the cyclone dust collector enters a dry-method deacidification tower, is fully mixed with lime powder and activated carbon powder sprayed from the top of the tower, and dioxin and acid gas in the flue gas are removed;

(5) the flue gas enters a combustion-supporting air preheater, the combustion-supporting air is preheated to more than 120 ℃ by utilizing the waste heat of the flue gas, the temperature of the flue gas is reduced to 70 ℃, the moisture in the flue gas is saturated, part of water vapor is condensed, and condensate is discharged from the bottom of the heat exchanger;

(6) the flue gas is sent into a waste gas incinerator, honeycomb heat storage ceramics are built at the bottom in a hearth, cold flue gas and the incinerated flue gas exchange heat through the heat storage ceramics, the temperature can reach 750 ℃, and VOC in the flue gas in the upper hearth of the waste gas incinerator is decomposed at the high temperature of 900 ℃;

(7) in the waste gas incinerator, high-temperature flue gas and low-temperature flue gas sequentially exchange heat through heat storage ceramics, the temperature of the high-temperature flue gas is 85-95 ℃ after the high-temperature flue gas exchanges heat through a heat storage body, and the flue gas enters a wet deacidification tower to be further subjected to acid gas removal.

Technical Field

The invention relates to the technical field, in particular to rotary kiln incineration equipment and a rotary kiln incineration process.

Background

The hazardous waste (hazardous waste) refers to a waste having one or more hazardous properties such as corrosivity, toxicity, flammability, reactivity, or infectivity. With the development of industry, the amount of hazardous waste discharged in the industrial production process is increasing, and how to carry out safe and efficient treatment has important significance on environmental safety.

In the existing hazardous waste incineration treatment system, various forms of hazardous wastes are mixed together and temporarily stored in a pit, and the wastes are lifted by a grab bucket and enter a kiln. The kiln entering mode causes a large amount of air leakage at the kiln head, which causes a series of problems that the oxygen content in the kiln can not be controlled, the burning working condition in the kiln is disordered, the afterburning of the secondary combustion chamber is frequent, and the like. And because the physical properties of different hazardous wastes are different, the hazardous wastes are mixed together and are easy to cause danger, and a plurality of inner pit explosion and deflagration events occur in China. In addition, the 'pit type' feeding mode is easy to generate leachate to pollute underground water and soil, and the waste gas is naturally discharged to the outside to cause environmental pollution problems such as air pollution and the like.

Therefore, it is desirable to provide a rotary kiln incineration apparatus and process, which can solve the above problems.

Disclosure of Invention

The invention aims to provide rotary kiln incineration equipment and process, which are thorough in incineration, effectively utilize incineration heat energy and simplify the process flow.

In order to achieve the purpose of the invention, the rotary kiln incineration equipment and the process are provided, wherein an incineration storage tank, a drying incineration tower, a rotary kiln body, a waste gas incinerator and a wet desulphurization tower are sequentially arranged along the treatment sequence of the incinerated substances;

a screw pump is connected between the incineration storage tank and the drying incineration tower;

the tail end of the rotary kiln body is provided with a fan;

and a cyclone dust collector, a dry deacidification tower and a bag-type dust collector are sequentially arranged between the rotary kiln body and the waste gas incinerator.

Preferably, a combustion-supporting air preheater is arranged on the bag-type dust collector.

Preferably, the front end and the rear end of the rotary furnace body are respectively provided with a burner.

Preferably, the waste gas incinerator is a regenerative incinerator.

Preferably, the front end of the incineration storage tank is provided with a material crushing device.

Preferably, the material crushing device comprises a shell and a stirring device;

a waste material inlet is formed in the upper part of one side of the shell, a discharge port is formed in the bottom of the shell, and the discharge port is connected with a feeding part of the incineration storage tank through a pipeline;

the stirring device comprises a motor and a stirring shaft; the motor is fixed the top of casing, and the inside of the vertical inside that penetrates the casing downwards of output shaft of motor, the (mixing) shaft sets up in the casing, and with the output shaft fixed connection of motor, be equipped with a plurality of cutting blades along its axis direction on the (mixing) shaft.

Preferably, the lower portion of the housing is in the form of a resulting trumpet-like structure.

The invention also aims to provide a rotary kiln incineration process, which adopts the rotary kiln incineration equipment to incinerate waste materials.

Further, the specific process is as follows,

(1) storing the crushed waste in a waste storage tank, pumping the waste to a drying incineration tower through a screw rod, reversely contacting with high-temperature flue gas in the chemical incineration tower, quickly finishing the primary drying dehydration process of sludge, and conveying the sludge into a rotary kiln body;

(2) the temperature in the rotary kiln body is controlled to be about 900 ℃, and the temperature of the smoke discharged by the drying incineration tower is 140 ℃;

(3) the flue gas enters a cyclone dust collector, most sludge particles are collected and then are sent back to the drying incineration tower through an inclined chute;

(4) flue gas discharged by the cyclone dust collector enters a dry-method deacidification tower, is fully mixed with lime powder and activated carbon powder sprayed from the top of the tower, and dioxin and acid gas in the flue gas are removed;

(5) the flue gas enters a combustion-supporting air preheater, the combustion-supporting air is preheated to more than 120 ℃ by utilizing the waste heat of the flue gas, the temperature of the flue gas is reduced to 70 ℃, the moisture in the flue gas is saturated, part of water vapor is condensed, and condensate is discharged from the bottom of the heat exchanger;

(6) the flue gas is sent into a waste gas incinerator, honeycomb heat storage ceramics are built at the bottom in a hearth, cold flue gas and the incinerated flue gas exchange heat through the heat storage ceramics, the temperature can reach 750 ℃, and VOC in the flue gas in the upper hearth of the waste gas incinerator is decomposed at the high temperature of 900 ℃;

(7) in the waste gas incinerator, high-temperature flue gas and low-temperature flue gas sequentially exchange heat through heat storage ceramics, the temperature of the high-temperature flue gas is 85-95 ℃ after the high-temperature flue gas exchanges heat through a heat storage body, and the flue gas enters a wet deacidification tower to be further subjected to acid gas removal.

Compared with the prior art, the invention has the following advantages:

(1) compared with the common spray drying and incineration, the operation cost of the wet sludge drying incineration can be effectively reduced, and the incineration heat energy utilization rate is improved by more than 10-20%;

(2) the concentration of the acid gas in the flue gas is reduced, so that the corrosion to subsequent equipment is reduced;

(3) the design is simple, easy to use, and low in manufacturing cost.

Drawings

Fig. 1 is a schematic plan view of a rotary kiln incineration apparatus in the present embodiment;

fig. 2 is a schematic structural view of the material crushing apparatus in this embodiment;

fig. 3 is a sectional view of the material crushing apparatus in this embodiment.

Detailed Description

The invention is further described below with reference to the following figures and specific examples.

As shown in fig. 1, a rotary kiln incineration device and process are sequentially provided with an incineration storage tank 1, a drying incineration tower 3, a rotary kiln body 4, a waste gas incinerator 9 and a wet desulphurization tower 10 along the treatment sequence of the incinerated substances;

a screw pump 2 is connected between the incineration storage tank 1 and the drying incineration tower 3;

the tail end of the rotary kiln body 4 is provided with a fan 5;

a cyclone dust collector 6, a dry deacidification tower 7 and a bag-type dust collector 8 are sequentially arranged between the rotary kiln body 4 and the waste gas incinerator 9.

Wherein, a combustion-supporting air preheater is arranged on the bag-type dust collector 8.

Wherein, the front end and the rear end of the rotary furnace body 4 are respectively provided with a burner.

Wherein, the waste gas incinerator 9 is a regenerative incinerator.

Wherein, the front end of the incineration storage tank 1 is provided with a material crushing device 11. Specifically, as shown in fig. 2 and 3, the material crushing device 11 includes a housing 15 and a stirring device;

a waste material inlet 17 is formed in the upper part of one side of the shell 15, a discharge hole 19 is formed in the bottom of the shell 15, and the discharge hole 19 is connected with a feeding part of the incineration storage tank 1 through a pipeline;

the stirring device comprises a motor 16 and a stirring shaft 17; the motor 16 is fixed at the top of the shell 15, an output shaft of the motor 16 vertically penetrates into the shell 15, the stirring shaft 17 is arranged in the shell 15 and fixedly connected with the output shaft of the motor 16, and a plurality of cutting blades 18 are arranged on the stirring shaft 17 along the axial direction of the stirring shaft. Preferably, the lower part of the housing 15 has a resulting trumpet-like structure, facilitating rapid blanking.

A rotary kiln incineration process adopts the rotary kiln incineration equipment to incinerate waste materials, and comprises the following specific processes,

(1) storing the crushed waste in a waste storage tank, pumping the waste to a drying incineration tower through a screw rod, reversely contacting with high-temperature flue gas in the chemical incineration tower, quickly finishing the primary drying dehydration process of sludge, and conveying the sludge into a rotary kiln body;

(2) the temperature in the rotary kiln body is controlled to be about 900 ℃, and the temperature of the smoke discharged by the drying incineration tower is 140 ℃;

(3) the flue gas enters a cyclone dust collector, most sludge particles are collected and then are sent back to the drying incineration tower through an inclined chute;

(4) flue gas discharged by the cyclone dust collector enters a dry-method deacidification tower, is fully mixed with lime powder and activated carbon powder sprayed from the top of the tower, and dioxin and acid gas in the flue gas are removed;

(5) the flue gas enters a combustion-supporting air preheater, the combustion-supporting air is preheated to more than 120 ℃ by utilizing the waste heat of the flue gas, the temperature of the flue gas is reduced to 70 ℃, the moisture in the flue gas is saturated, part of water vapor is condensed, and condensate is discharged from the bottom of the heat exchanger;

(6) the flue gas is sent into a waste gas incinerator, honeycomb heat storage ceramics are built at the bottom in a hearth, cold flue gas and the incinerated flue gas exchange heat through the heat storage ceramics, the temperature can reach 750 ℃, and VOC in the flue gas in the upper hearth of the waste gas incinerator is decomposed at the high temperature of 900 ℃;

(7) in the waste gas incinerator, high-temperature flue gas and low-temperature flue gas sequentially exchange heat through heat storage ceramics, the temperature of the high-temperature flue gas is 85-95 ℃ after the high-temperature flue gas exchanges heat through a heat storage body, and the flue gas enters a wet deacidification tower to be further subjected to acid gas removal.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is intended to cover various modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.