CN114812202A - Feeding preheating bin and cement kiln waste treatment device and treatment method thereof - Google Patents

Abstract

The invention discloses a feeding preheating bin and a cement kiln waste treatment device and a treatment method thereof, wherein a conveying platform comprises a plurality of stages of step structures which are connected along a preheating direction and gradually lower, each step structure comprises a material bearing area for bearing waste and an air blowing port matched with the material bearing area, the air blowing port is communicated with an air cannon for supplying air flow to the air blowing port, the air flow flows along the preheating direction through the air blowing port and pushes the waste at the material bearing area, the waste can be conveyed along the step structures at all stages by arranging the step structures, the whole pile of waste is spread on the step structures at all stages, the air flow sprayed by the air blowing port pushes the waste at the material bearing area, the waste is conveyed along the step structures at all stages, the moving speed of the waste in the preheating bin body is delayed, so as to ensure the waste is fully heated in the preheating bin body, and compared with the prior art, a plurality of decomposing furnaces are still required to be arranged, the invention effectively simplifies the structure and reduces the manufacturing cost.

Description

Feeding preheating bin and cement kiln waste treatment device and treatment method thereof

Technical Field

The invention relates to the technical field of waste treatment, in particular to a feeding preheating bin and a cement kiln waste treatment device and method thereof.

Background

The cement kiln co-treatment is a new waste treatment method proposed by the cement industry, and means that solid waste meeting or meeting the kiln entering requirement after pretreatment is put into a cement kiln, and the harmless treatment process of the solid waste is realized while cement clinker production is carried out. The cement kiln waste disposal system comprises a disposal system such as an SMP system, a sludge system, a waste liquid system, a manual delivery system and the like, wherein hazardous waste is directly thrown into a kiln tail decomposing furnace, if the amount of the waste instantaneously entering the kiln is too large, too much waste is quickly rolled out of the kiln by the decomposing furnace, too much waste is contacted with cement raw materials, and various parameters of a pre-preheater system such as air volume, temperature, pressure and the like are inevitably unstable, the heat exchange efficiency in the decomposing furnace is seriously influenced by the uneven combustion of the waste, so that the yield of the kiln is influenced, and in order to ensure that the cement yield is only reduced by the input amount of the hazardous waste, the disposal system is also a main reason for the cement kiln to treat the hazardous waste in cooperation with the yield of the hazardous waste.

Patent document CN112794661A discloses a novel dry process cement kiln tail system of preheating, including the preheater tower, outer preheater of tower and kiln tail smoke chamber, be equipped with at least one set of preheating system and dore furnace in the preheater tower, preheater in every set of preheating system includes the multistage tower that top-down set up, the discharge gate of the first-level preheater in the multistage tower bottom links to each other with the dore furnace, kiln tail smoke chamber links to each other with an air inlet of dore furnace through first pipeline of bending, the intake stack of the first-level preheater in the multistage tower bottom links to each other with the air-out pipeline of outer preheater of tower through second pipeline of bending. But it sets up multistage preheater for the discarded object needs one-level to carry to the preheater in, and inevitable result in the transportation process waste time and energy, and lead to whole system complicacy and then increase the cost.

Disclosure of Invention

The invention aims to provide a feeding preheating bin, a cement kiln waste treatment device and a treatment method thereof, aiming at solving the problems in the prior art, wherein a blowing port is used for jetting airflow to push waste in a material bearing area, the waste is conveyed along each step structure in one step, the waste can be dispersed along the step structure, the moving speed of the waste in a preheating bin body can be delayed, the whole conveying structure is simple, and the completeness of preheating and decomposition of the waste can be improved.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a feeding preheating bin which comprises a preheating bin body for preheating and decomposing waste and a conveying platform positioned in the preheating bin body, wherein the conveying platform comprises a plurality of stages of step structures which are connected along a preheating direction and gradually reduce, each step structure comprises a material bearing area for bearing the waste and an air blowing port which is matched with the material bearing area, the air blowing ports are communicated with air guns for supplying air flow to the air blowing ports, and the air flow flows along the preheating direction through the air blowing ports and pushes the waste at the material bearing area.

Preferably, a temperature sensor is arranged in the preheating bin body, the temperature sensor is electrically connected with a control mechanism for controlling the starting and stopping frequency of the air cannon, and a temperature value obtained by monitoring of the temperature sensor is in direct proportion to the injection frequency of the air cannon.

Preferably, the preheating bin body is matched with an air inlet chamber for introducing combustion air into the preheating bin body, the material bearing areas are provided with air vents communicated with the air inlet chamber, and the air vents are covered with ventilation grate plates.

Preferably, the top of the preheating bin body is provided with an air outlet communicated with the negative pressure induced air mechanism, the air outlet is provided with a high-temperature valve for adjusting the air outlet speed, the preheating bin body is provided with a first gas pressure sensor, and the first gas pressure sensor is electrically connected with a control mechanism for adjusting the closing size of the high-temperature valve.

Preferably, the air inlet chamber is matched with an air inlet fan for supplying air to the air inlet chamber, a second air pressure sensor is arranged in the air inlet chamber, and the second air pressure sensor is electrically connected with a control mechanism for adjusting the power of the air inlet fan.

Preferably, a feed inlet is arranged at the position, corresponding to the first-stage step structure, of the preheating bin body, a feed air locking valve connected with a feeding mechanism is arranged at the position of the feed inlet, a material receiving platform used for receiving blanking and supplying sliding transmission of waste is matched with the feed inlet, and the material receiving platform is connected with the material receiving area of the first-stage step structure.

Preferably, a discharge port is arranged at the position of the preheating bin body corresponding to the last stage of the stepped structure, a discharge platform for sliding and falling of waste is connected between the material bearing area of the last stage of the stepped structure and the discharge port, and a burner with a flame spraying direction opposite to the preheating direction is arranged at the discharge port.

Still provide a cement kiln waste treatment device, include throw material preheating bin and kiln tail dore furnace, throw material preheating bin includes preheating the storehouse body, kiln tail dore furnace with preheat the discharge gate of storehouse body and be linked together, the discharge gate with be equipped with between the kiln tail dore furnace and be used for the broken roller mechanism of waste.

Preferably, the kiln tail decomposing furnace is connected with a smoke exhaust pipeline, the smoke exhaust pipeline is communicated with a negative pressure induced draft mechanism used for leading out smoke, and the smoke exhaust pipeline is communicated with an air outlet of the preheating bin body.

The treatment method of the cement kiln waste treatment device comprises the following steps:

preheating: heating the preheating bin body by a burner to a temperature required by heating and decomposing the waste;

feeding: starting the feeding mechanism and feeding the preheating bin body through the feeding airlock valve, and allowing the waste to fall to the feeding end of the conveying platform through the feeding port of the preheating bin body;

conveying waste: after the waste falls on the material bearing area of the first-stage step structure through the material receiving platform, opening the air cannons to jet air flow to the waste through the air blowing ports, pushing the waste away from the material bearing area of the first-stage step structure and falling to the material bearing area of the next-stage step structure, and so on, after the waste falls on the last-stage step structure, pushing the waste away by the jet air flow and falling to the discharge port, wherein the starting and stopping frequency of each air cannon is gradually increased along with the increase of the internal temperature of the preheating bin body, and is gradually decreased along with the decrease of the internal temperature of the preheating bin body;

ventilating: when the waste is conveyed, the air inlet fan is started, air is uniformly distributed through the air inlet chamber, and then air is introduced into the preheating bin body through the ventilation grate plate to support combustion of the waste;

crushing waste: crushing the waste falling to the discharge port by a roller crushing mechanism, and crushing and dispersing the waste;

treating waste: the crushed waste enters a kiln tail decomposing furnace and is mixed with cement raw materials to finish the preparation of cement clinker;

flue gas treatment: and after feeding, starting the negative pressure induced draft mechanism, and discharging waste gas generated in the kiln tail decomposing furnace and the preheating bin body through the negative pressure induced draft mechanism.

Compared with the prior art, the invention has the following technical effects:

firstly, the conveying platform comprises a plurality of stages of step structures which are connected along the preheating direction and gradually lower, each step structure comprises a material bearing area for bearing the waste and an air blowing port which is matched with the material bearing area, the air blowing port is communicated with an air cannon for supplying air flow to the air blowing port, the air flow flows along the preheating direction through the air blowing port and pushes the waste at the material bearing area, on one hand, the waste can be conveyed along each stage of step structure step by arranging the step structures, the whole pile of waste is spread on each stage of step structure, the air flow sprayed by the air blowing port pushes the waste in the material bearing area, the waste is conveyed along each stage of step structure, the moving speed of the waste in the preheating bin body is delayed, so that the waste is fully heated in the preheating bin body and can be effectively decomposed at high temperature, and compared with the prior art, a plurality of decomposing furnaces are still required to be arranged, the waste sequentially passes through the decomposing furnaces, so that the structure is effectively simplified, and the manufacturing cost is reduced; on the other hand, the waste is not directly fed into the decomposing furnace but is firstly fed into a preheating bin for preheating, most combustible waste is incinerated, a small amount of solid waste is preheated and heated and then fed into a kiln tail smoke chamber, and the influence on a kiln system due to temperature difference and uneven combustion of the waste is reduced to the maximum extent.

Secondly, this internal temperature sensor that is equipped with of storehouse of preheating, temperature sensor electricity is connected with the control mechanism who is used for controlling air bubble start-stop frequency, the temperature value that temperature sensor monitoring obtained is directly proportional with air bubble injection frequency, the temperature variation of storehouse body of preheating is obtained through temperature sensor monitoring, with the real-time feedback to control mechanism, adjust the injection frequency of air bubble through control mechanism, with the removal rate of control discarded object, for example when the temperature is too high, improve the injection frequency of air bubble, accelerate the removal rate of discarded object, improve the thermal decomposition efficiency, when the temperature is low excessively, reduce the injection frequency of air bubble, reduce the removal rate of discarded object, guarantee that the discarded object can fully be heated and decomposed, and then guaranteed the preheating treatment effect of storehouse body to the discarded object.

Thirdly, preheat storehouse body matching and have the air inlet chamber that lets in combustion air to it, and hold the material district and all set up the vent that is linked together with the air inlet chamber, vent department closing cap is equipped with the ventilation comb board, guarantee the even effect to the air inlet through the air inlet chamber, make the air that each vent got into can be more even, guarantee to preheating the combustion-supporting effect of storehouse body inside, vent department sets up the ventilation comb board, in order when guaranteeing the ventilation effect, avoid the discarded object residue to drop to in the air inlet chamber, and avoid the setting because of the vent, make the removal of discarded object receive the influence.

Fourthly, the air outlet that negative pressure induced air mechanism is linked together is seted up at the top of preheating the storehouse body, air outlet department is equipped with the high temperature valve that is used for adjusting air-out speed, it is equipped with first gas pressure sensor to preheat the storehouse body, first gas pressure sensor electricity is connected with and is used for adjusting the control mechanism of the closed size of high temperature valve, preheat this internal negative pressure intensity of storehouse through first gas pressure sensor in order to monitor, with the closed size of real-time regulation high temperature valve, and then the air output of adjusting preheating the storehouse body, in order to guarantee to preheat this internal negative pressure environment of storehouse and be in stable state, reduce the influence to the discarded object heating.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic view of the overall structure of the present invention;

wherein, the device comprises a feeding air locking valve 1, a feeding mechanism 2, a high temperature valve 3, a middle high temperature zone 4, a preheating bin body 5, a temperature sensor 6, a first gas pressure sensor 7, an air inlet fan 8, a second gas pressure sensor 9, an air cannon 10, a ventilation grate plate 11, an air inlet chamber 12, a step structure 13, a kiln tail decomposing furnace 14 and a roller crushing mechanism 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a feeding preheating bin, a cement kiln waste treatment device and a treatment method thereof, aiming at solving the problems in the prior art, wherein a blowing port is used for jetting airflow to push waste in a material bearing area, the waste is conveyed along each step structure in one step, the waste can be dispersed along the step structure, the moving speed of the waste in a preheating bin body can be delayed, the whole conveying structure is simple, and the completeness of preheating and decomposition of the waste can be improved.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1, a feeding preheating bin is provided, which includes a preheating bin body 5 for preheating and decomposing waste, and a conveying platform located in the preheating bin body 5, preferably, the bin inner wall of the preheating bin body 5 is made of a refractory material, the outer wall is made of a steel structure, the conveying platform includes a plurality of stages of step structures 13 connected along a preheating direction and gradually lowered, the preheating direction is the moving and conveying direction of the waste, each step structure 13 includes a material receiving area for receiving the waste, and an air blowing port matched with the material receiving area, the air blowing port is communicated with an air cannon 10 for supplying air jet to the air cannon, the air jet flows along the preheating direction through the air blowing port and pushes the waste at the material receiving area, on one hand, the waste can be conveyed along the step structures 13 step by setting the step structures 13, and the whole pile of waste is spread on the step structures 13, the blowing port is used for jetting airflow to push the waste in the material bearing area, the waste is conveyed along the step structures 13 of each stage in a one-stage mode, the moving speed of the waste in the preheating bin body 5 is delayed, the waste is fully heated in the preheating bin body 5 and can be effectively decomposed at high temperature, and compared with the prior art that a plurality of decomposing furnaces are still needed to be arranged, the waste sequentially passes through the decomposing furnaces, the structure is effectively simplified, and the manufacturing cost is reduced; on the other hand, the waste is not directly fed into the decomposing furnace but is firstly fed into a preheating bin for preheating, most combustible waste is incinerated, a small amount of solid waste is preheated and heated and then fed into a kiln tail smoke chamber, and the influence on a kiln system due to temperature difference and uneven combustion of the waste is reduced to the maximum extent.

Preferably, the step structure 13 includes a step side wall and a step bottom wall, the step top wall and the step side wall are arranged along the preheating direction, the air blowing port is formed in the step side wall, the step bottom wall is used as a material receiving area for receiving waste, the air blowing port is opposite to the waste on the step bottom wall, and then the waste is moved and falls onto the step bottom wall of the next step structure 13 by jetting air flow; preferably, the step side wall is vertically arranged, or the top of the step side wall inclines towards the preheating direction, so that the waste residues can be prevented from falling into the air blowing port at the air outlet gap of the air blowing port in the falling process of the waste.

Wherein, be equipped with temperature sensor 6 in preheating the storehouse body 5, temperature sensor 6 electricity is connected with the control mechanism who is used for controlling air bubble 10 frequency of opening and close, the temperature value that temperature sensor 6 monitoring obtained is directly proportional with air bubble 10 injection frequency, the temperature variation of preheating the storehouse body 5 through temperature sensor 6 monitoring, with the real-time feedback to control mechanism, adjust air bubble 10's injection frequency through control mechanism, with the removal rate of control discarded object, for example when the temperature is too high, improve air bubble 10's injection frequency, accelerate the removal rate of discarded object, improve heating decomposition efficiency, when the temperature is too low, reduce air bubble 10's injection frequency, reduce the removal rate of discarded object, guarantee that the discarded object can fully be heated and decomposed, and then guaranteed preheating storehouse body 5 to the preheating treatment effect of discarded object.

Preferably, preheat storehouse body 5 and be furnished with the air inlet room 12 that lets in combustion air to it, and hold the material district and all set up the vent that is linked together with air inlet room 12, vent department closing cap is equipped with ventilation grid plate 11, guarantee the even effect to the air inlet through air inlet room 12, make the air that each vent got into can be more even, guarantee to preheating the inside combustion-supporting effect of storehouse body 5, vent department sets up ventilation grid plate 11, in order when guaranteeing the ventilation effect, avoid the discarded object residue to drop to in the air inlet room 12, and avoid the setting because of the vent, make the removal of discarded object receive the influence.

Further, the air exit that negative pressure induced air mechanism is linked together is seted up at the top of preheating storehouse body 5, air exit department is equipped with the high temperature valve 3 that is used for adjusting air-out speed, it is equipped with first gas pressure sensor 7 to preheat storehouse body 5, first gas pressure sensor 7 electricity is connected with the control mechanism who is used for adjusting the closed size of high temperature valve 3, with the negative pressure intensity in preheating storehouse body 5 through first gas pressure sensor 7 in order to monitor, with the closed size of real-time regulation high temperature valve 3, and then adjust the air output of preheating storehouse body 5, in order to guarantee to preheat the negative pressure environment in storehouse body 5 and be in stable state, reduce the influence to the discarded object heating.

As a preferred embodiment of the present invention, the air inlet chamber 12 is provided with an air inlet fan 8 for supplying air thereto, and the air inlet chamber 12 is provided therein with a second air pressure sensor 9, the second air pressure sensor 9 is electrically connected with a control mechanism for adjusting the power of the air inlet fan 8, so as to adjust the air inlet volume in real time, specifically, the air pressure in the air inlet chamber 12 is obtained by the second air pressure sensor 9, and is adjusted according to the monitoring value of the first air pressure sensor 7, when the monitoring value of the second air pressure sensor 9 is too low or too high, the power of the air inlet fan 8 is adjusted, so as to adjust the air volume in the air inlet chamber 12, thereby avoiding the excessive influence of the inlet air on the negative pressure environment in the preheating bin body 5.

Further, the position of preheating bin body 5 corresponding to primary step structure 13 is provided with a feed inlet, the feed inlet is provided with a feed air lock valve 1 connected with a feeding mechanism 2, the feed inlet is matched with a material receiving platform for receiving the blanking and supplying the sliding transmission of the waste, the material receiving platform is connected with a material receiving area of the primary step structure 13, the preferred material receiving platform and a conveying platform are on equal gradient, after the blanking of the feed inlet, the waste can fall onto the material receiving platform, and then the waste is moved to the material receiving area of the primary step structure 13 along the material receiving platform, the waste is guaranteed to be effectively controlled to move, and the influence on the negative pressure environment in the preheating bin body 5 during feeding is avoided by arranging the feed air lock valve 1.

Further, preheat the position department that storehouse body 5 corresponds last stage stair structure 13 and be equipped with the discharge gate, be connected with the ejection of compact platform that supplies the discarded object to slide the whereabouts between holding material district and the discharge gate of last stage stair structure 13, discharge gate department is equipped with the burner that flame injection direction and preheating direction are opposite, because hot-air flows up, so the burner setting is behind the bottom, can guarantee to carry out abundant burning to the discarded object in the whole storehouse body 5 that preheats.

Further, still provide a cement kiln waste treatment device, including throwing material preheating bin and kiln tail dore furnace 14, throw the material preheating bin including preheating storehouse body 5, kiln tail dore furnace 14 is linked together with the discharge gate that preheats storehouse body 5, be equipped with between discharge gate and the kiln tail dore furnace 14 and be used for the broken roll mechanism 15 of discarded object, there is bold cinder after the discarded object sintering, it influences the kiln cement calcination easy stifled unloading passageway simultaneously directly to go into the meeting, and then through the emergence of smashing the discarded object in order to avoid this phenomenon. And the feeding amount is increased to 10-15T/h from the original 3-5T/h by arranging the feeding preheating bin, and the yield of the cement clinker is not influenced.

As a preferred embodiment of the invention, the kiln tail decomposing furnace 14 is connected with a smoke exhaust pipeline, the smoke exhaust pipeline is communicated with a negative pressure induced draft mechanism for leading out smoke, the smoke exhaust pipeline is communicated with an air outlet of the preheating bin body 5, so that the smoke generated after waste combustion can be intensively treated through the smoke exhaust pipeline, a high-temperature area 4 in the cement decomposing furnace is arranged between the smoke exhaust pipeline and the air outlet, and the smoke is subjected to high-temperature heating treatment through the high-temperature area 4 in the cement decomposing furnace, so that harmful gases are completely removed.

Further, a treatment method of the cement kiln waste treatment device is also provided, and comprises the following steps:

preheating: the preheating bin body 5 is heated by a burner to the temperature required by heating and decomposing the waste; preferably, the preheating bin is heated by a burner before feeding until the temperature reaches 600 ℃;

feeding: the feeding mechanism is started, the preheating bin body 5 is fed through the feeding airlock valve 1, and waste falls to the feeding end of the conveying platform through the feeding port of the preheating bin body 5 and specifically falls to the material bearing area of the first-stage step mechanism through the material receiving platform;

conveying waste: after the waste falls on the material bearing area of the first-stage stepped structure 13 through the material receiving platform, the air cannons 10 are started to jet air flow to the waste through the air blowing ports, the waste is pushed away from the material bearing area of the first-stage stepped structure 13 and falls on the material bearing area of the next-stage stepped structure 13, the rest is done in a similar manner, after the waste falls on the last-stage stepped structure 13, the waste is pushed away by the jet air flow and falls to the discharge port, the starting and stopping frequency of each air cannon 10 is gradually increased along with the increase of the temperature in the preheating bin body 5 and is gradually reduced along with the decrease of the temperature in the preheating bin body 5; wherein, the stepping speed of the air cannon 10 to the waste is adjusted, the waste is moved along each stage of step structure 13 for preheating and burning, and the temperature is controlled between 900 and 1000 ℃ for stable burning.

Ventilating: when the waste is conveyed, the air inlet fan 8 is started, air is uniformly distributed through the air inlet chamber 12, and air is introduced into the preheating bin body 5 through the ventilation grate plate 11 to support combustion of the waste; wherein the combustion supporting is continuously heated, and when the temperature reaches 800 ℃, the burner is stopped and the air cannon 10 is started;

crushing waste: crushing the waste falling to the discharge port through a roller crushing mechanism 15, and crushing and dispersing the waste; then enters a kiln tail decomposing furnace 14; the wastes have large material residues after being sintered, and the wastes are directly fed into a kiln to influence cement calcination in the kiln and easily block a discharging channel, so that the wastes are crushed to avoid the phenomenon;

treating waste: the crushed waste enters a kiln tail decomposing furnace 14 and is mixed with cement raw materials to finish the preparation of cement clinker; after the waste enters the preheating bin, most of combustible waste is incinerated, a small amount of solid waste is preheated and heated to more than 900 ℃ and crushed and then enters the kiln tail smoke chamber, so that the influence on a kiln system due to temperature difference and uneven combustion of the waste is reduced to the maximum extent, the feeding amount is increased from the original 3-5T/h to the current 10-15T/h after the modification, and the yield of cement clinker is not influenced;

flue gas treatment: after feeding, starting a negative pressure induced draft mechanism, and discharging waste gas generated in the kiln tail decomposing furnace 14 and the preheating bin body 5 through the negative pressure induced draft mechanism; the optimized incinerated flue gas enters a high-temperature area 4 in the cement decomposing furnace through a high-temperature regulating valve at the top of the preheating bin to ensure that harmful gas is completely removed, the whole process realizes automatic control through a pressure sensor 6 and a background central control system to ensure that the kiln entering amount, the temperature and the pressure are stable, the opening degree of an outlet high-temperature valve 3 can be regulated according to the pressure in the bin, and the interior of the bin is always kept at negative pressure.

The adaptation according to the actual needs is within the scope of the invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. The feeding preheating bin is characterized by comprising a preheating bin body for preheating and decomposing waste and a conveying platform located in the preheating bin body, wherein the conveying platform comprises a plurality of stages of step structures which are connected along the preheating direction and gradually reduce, each step structure comprises a material bearing area for bearing the waste and a blowing port matched with the material bearing area, the blowing port is communicated with an air cannon for supplying air jet of the blowing port, and the air jet flows through the blowing port and along the preheating direction and pushes the waste at the material bearing area.

2. The charging preheating bin of claim 1, wherein a temperature sensor is arranged in the preheating bin body, the temperature sensor is electrically connected with a control mechanism for controlling the on-off frequency of the air cannon, and a temperature value monitored by the temperature sensor is in direct proportion to the injection frequency of the air cannon.

3. The charging preheating bin as claimed in claim 2, wherein the preheating bin body is provided with an air inlet chamber for introducing combustion air into the preheating bin body, the material bearing regions are provided with air vents communicated with the air inlet chamber, and the air vents are covered by ventilation grate plates.

4. The feeding preheating bin as claimed in claim 3, wherein an air outlet communicated with the negative pressure air inducing mechanism is formed in the top of the preheating bin body, a high-temperature valve for adjusting air outlet speed is arranged at the air outlet, the preheating bin body is provided with a first gas pressure sensor, and the first gas pressure sensor is electrically connected with a control mechanism for adjusting the closing size of the high-temperature valve.

5. The feeding preheating bin as claimed in claim 4, wherein the air inlet chamber is provided with an air inlet fan for supplying air to the air inlet chamber, and a second air pressure sensor is arranged in the air inlet chamber and electrically connected with a control mechanism for adjusting the power of the air inlet fan.

6. A feeding preheating bin as claimed in claim 5, wherein a feeding port is provided at a position of the preheating bin body corresponding to the first-stage step structure, a feeding air lock valve connected with a feeding mechanism is provided at the feeding port, and a receiving platform for receiving the blanking and for sliding transmission of waste is provided at the feeding port, and the receiving platform is connected with the receiving area of the first-stage step structure.

7. The charging and preheating bin as claimed in claim 6, wherein a discharge port is provided at a position of the preheating bin body corresponding to the last stage of the stepped structure, a discharge platform for sliding and dropping waste is connected between the material bearing area of the last stage of the stepped structure and the discharge port, and a burner with a flame spraying direction opposite to a preheating direction is provided at the discharge port.

8. The cement kiln waste treatment device applying the feeding preheating bin as defined in any one of claims 5 to 7, characterized by comprising the feeding preheating bin and a kiln tail decomposing furnace, wherein the feeding preheating bin comprises a preheating bin body, the kiln tail decomposing furnace is communicated with a discharge port of the preheating bin body, and a roller crushing mechanism for crushing waste is arranged between the discharge port and the kiln tail decomposing furnace.

9. The cement kiln waste treatment device as claimed in claim 8, wherein the kiln tail decomposing furnace is connected with a smoke exhaust pipeline, the smoke exhaust pipeline is communicated with a negative pressure induced draft mechanism for leading out smoke, and the smoke exhaust pipeline is communicated with an air outlet of the preheating bin body.

10. A treatment method using the cement kiln waste treatment apparatus as set forth in claim 8 or 9, comprising the steps of:

preheating: heating the preheating bin body by a burner to a temperature required by heating and decomposing the waste;

feeding: starting the feeding mechanism and feeding the preheating bin body through the feeding airlock valve, and allowing the waste to fall to the feeding end of the conveying platform through the feeding port of the preheating bin body;

conveying waste: after the waste falls on the material bearing area of the first-stage step structure through the material receiving platform, opening the air cannons to jet air flow to the waste through the air blowing ports, pushing the waste away from the material bearing area of the first-stage step structure and falling to the material bearing area of the next-stage step structure, and so on, after the waste falls on the last-stage step structure, pushing the waste away by the jet air flow and falling to the discharge port, wherein the starting and stopping frequency of each air cannon is gradually increased along with the increase of the internal temperature of the preheating bin body, and is gradually decreased along with the decrease of the internal temperature of the preheating bin body;

ventilating: when the waste is conveyed, the air inlet fan is started, air is uniformly distributed through the air inlet chamber, and then air is introduced into the preheating bin body through the ventilation grate plate to support combustion of the waste;

crushing waste: crushing the waste falling to the discharge port by a roller crushing mechanism, and crushing and dispersing the waste;

treating waste: the crushed waste enters a kiln tail decomposing furnace and is mixed with cement raw materials to finish the preparation of cement clinker;

flue gas treatment: and after feeding, starting the negative pressure induced draft mechanism, and discharging waste gas generated in the kiln tail decomposing furnace and the preheating bin body through the negative pressure induced draft mechanism.

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