阅读说明：本技术 一体式卧式多螺旋板余热回收加热炉干燥系统 (Integrated horizontal multi-spiral-plate waste heat recovery heating furnace drying system ) 是由 兰成均 黄凤 李芳娟 吴林 邹文径 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种一体式卧式多螺旋板余热回收加热炉干燥系统,包括一体式卧式多螺旋板余热回收加热炉、干燥风进口过渡段、气流干燥设备、引风机控制系统、助燃风配线系统、催化剂进料系统。本发明加热炉燃烧产生的高温空气直接进入气流干燥设备进行干燥催化剂、其高温所产生的的余热有效提高加热炉燃烧器的助燃空气温度、节省设备建造投资的同时使得装置实现节能降耗、绿色环保。采用“冷壁+热壁”技术,既采用非金属耐火内衬降低加热炉炉体壁温,又有效利用加热炉炉体余热进行回收利用,降低设备整体重量,节省设备及结构投资。本发明能提高传热、传质系数,加快物流干燥速度,有效降低气流干燥设备直管长度等。(The invention discloses an integrated horizontal multi-spiral-plate waste heat recovery heating furnace drying system which comprises an integrated horizontal multi-spiral-plate waste heat recovery heating furnace, a drying air inlet transition section, an airflow drying device, an induced draft fan control system, a combustion air distribution system and a catalyst feeding system. The high-temperature air generated by the combustion of the heating furnace directly enters the airflow drying equipment to dry the catalyst, and the waste heat generated by the high temperature effectively improves the temperature of the combustion air of the burner of the heating furnace, saves the construction investment of the equipment, and simultaneously realizes energy conservation, consumption reduction and environmental protection. By adopting the technology of 'cold wall and hot wall', the wall temperature of the furnace body of the heating furnace is reduced by adopting the non-metal refractory lining, the waste heat of the furnace body of the heating furnace is effectively utilized for recycling, the whole weight of the equipment is reduced, and the equipment and the structure investment are saved. The invention can improve the heat transfer and mass transfer coefficients, accelerate the drying speed of the material flow, effectively reduce the length of the straight pipe of the air flow drying equipment, and the like.)

1. An integrated horizontal multi-spiral-plate waste heat recovery heating furnace drying system is characterized by comprising an integrated horizontal multi-spiral-plate waste heat recovery heating furnace, a drying air inlet transition section, an airflow drying device, an induced draft fan control system, a combustion-supporting air distribution system and a catalyst feeding system, wherein the catalyst feeding system is arranged on the airflow drying device;

the integrated horizontal multi-spiral-plate waste heat recovery heating furnace comprises a heating system, a horizontal furnace body, a plurality of spiral plates, a cold air inlet filter and a rear distributor, wherein the horizontal furnace body comprises a high-temperature air front section, a high-temperature air conical section and a high-temperature air rear section which are sequentially communicated from left to right, the cross-sectional diameter of the high-temperature air front section is larger than that of the high-temperature air rear section, a horizontal furnace body outer jacket is sleeved outside the horizontal furnace body, the outer wall of the horizontal furnace body and the inner wall of the horizontal furnace body outer jacket enclose to form a waste heat recovery cavity, the cold air inlet filter is arranged on the end face of the waste heat recovery cavity close to one side of the high-temperature air front section, the horizontal furnace body outer jacket is provided with the plurality of spiral plates at equal intervals, the spiral plates are positioned in the waste heat recovery cavity, cold, the lateral surface of the horizontal furnace body outer jacket is provided with a combustion-supporting air outlet communicated with the interior of the waste heat recovery cavity corresponding to the rear section of the high-temperature air, the front end of the waste heat recovery cavity corresponding to the combustion-supporting air outlet is provided with a rear distributor, the lateral end surface of the horizontal furnace body is provided with a sealing cover, the middle of the sealing cover is provided with a heat supply system communicated with the interior of the horizontal furnace body, the heat supply system is provided with a first combustion-supporting air inlet, the periphery of the sealing cover is provided with an annular air bag box, a group of circular through holes are uniformly distributed on the sealing cover in the circumferential direction, the annular air bag box is communicated with the interior of the front section of the high-temperature air through the circular through holes, the lateral surface of the annular air bag box is provided with a second combustion-supporting air inlet communicated with the interior of the annular air bag box, the end of the high-temperature air rear section, which is far away from the high-temperature air conical section, is provided with a high-temperature air outlet, and the high-temperature air outlet is communicated with the airflow drying equipment through a drying air inlet transition section;

the airflow drying equipment comprises a gas cyclone straight tube type catalyst drying device and an airflow inclined tube, wherein one end of the airflow inclined tube is communicated with the gas cyclone straight tube type catalyst drying device, and the other end of the airflow inclined tube is communicated with a gas-solid separation system.

2. The drying system of the integrated horizontal multi-spiral-plate waste heat recovery heating furnace according to claim 1, wherein the gas swirling straight-tube type catalyst drying device comprises an airflow drying straight tube, a first drying airflow intensifier and a second drying airflow intensifier, one end of the airflow drying straight tube is communicated with the drying air inlet transition section, the other end of the airflow drying straight tube is communicated with the airflow inclined tube, the catalyst feeding system is arranged on the side surface of the airflow drying straight tube, and the first drying airflow intensifier and the second drying airflow intensifier are respectively arranged at the lower part and the upper part of the airflow drying straight tube, which correspond to the catalyst feeding system.

3. The drying system of the integrated horizontal multi-spiral plate waste heat recovery heating furnace according to claim 1, wherein a non-metal refractory lining is arranged on the inner wall of the horizontal furnace body.

4. The drying system of the integrated horizontal multi-spiral plate waste heat recovery heating furnace according to claim 1, wherein a saddle support is arranged at the bottom of the horizontal furnace body;

the saddle support comprises an internal support part and an external support frame, the external support frame is arranged at the bottom outside the outer jacket of the horizontal furnace body, the internal support part is arranged in the waste heat recovery cavity and right above the external support frame, and the internal support part is in an arc shape;

the inner supporting part comprises an upper top plate, a middle supporting plate and a lower bottom plate which are sequentially arranged from top to bottom, and a group of long circular through holes are uniformly distributed in the middle supporting plate.

5. The integrated horizontal multi-spiral plate waste heat recovery furnace drying system according to claim 1, wherein the catalyst feeding system comprises a screw conveyor.

6. The integrated horizontal multi-spiral plate waste heat recovery heating furnace drying system according to claim 1, wherein the heat supply system is a burner.

7. The drying system of the integrated horizontal multi-spiral-plate waste heat recovery heating furnace according to claim 2, wherein the gas cyclone straight tube type catalyst drying device further comprises a vertical support assembly, and the air flow drying straight tube is provided with the vertical support assembly.

8. The drying system of the integrated horizontal multi-spiral plate waste heat recovery heating furnace according to claim 1, wherein at least two horizontal support assemblies are arranged on the airflow inclined pipe, and a wave compensator is arranged between the airflow inclined pipe and each horizontal support assembly.

9. The drying system of the integrated horizontal multi-spiral plate waste heat recovery heating furnace according to claim 1, wherein a manhole is arranged on the side surface of the front high-temperature air section, a safety device and a first thermometer port are arranged on the high-temperature air cone section, and a vent port and a second thermometer port are arranged on the rear high-temperature air section.

Technical Field

The invention belongs to the technical field of drying systems, and particularly relates to an integrated horizontal multi-spiral-plate waste heat recovery heating furnace drying system for drying catalyst products by providing dry air through combustion of liquid, gas or gas-liquid mixed fuel for a cracking catalyst preparation device and similar devices.

Background

The cracking catalyst is an important catalyst used in the process of processing heavy oil, and has the function of cracking residual oil and heavy oil into light fuel oil such as gasoline, diesel oil and the like and other chemical raw materials. The cracking catalyst generally consists of kaolin, alumina and molecular sieve, and the preparation process comprises colloid preparation, spray drying, washing and drying to obtain the final product. The particle distribution of the catalyst is generally 0-150 mu m, the median particle size is about 70 mu m, and the drying of the product needs high-temperature air for drying and roasting.

At present, the waste heat recovery equipment and the heating furnace body in the prior art are two independent devices, the construction investment is large, and the waste heat recovery efficiency of the waste heat recovery heating furnace in the prior art is lower, so that the fuel consumption of the heating furnace is large, and the environment is polluted.

Disclosure of Invention

The invention aims to solve the technical problem of providing an integrated horizontal multi-spiral plate waste heat recovery heating furnace drying system which has the advantages that waste heat recovery and a heating furnace body are integrated, high-temperature air generated by combustion of the heating furnace directly enters airflow drying equipment to dry a catalyst, the waste heat generated by the high temperature effectively improves the temperature of combustion air of a burner of the heating furnace, the equipment construction investment is saved, and meanwhile, the device is energy-saving, consumption-reducing and environment-friendly.

In order to solve the technical problems, the invention adopts the following technical scheme:

an integrated horizontal multi-spiral-plate waste heat recovery heating furnace drying system comprises an integrated horizontal multi-spiral-plate waste heat recovery heating furnace, a drying air inlet transition section, an airflow drying device, an induced draft fan control system, a combustion-supporting air distribution system and a catalyst feeding system, wherein the catalyst feeding system is arranged on the airflow drying device;

the integrated horizontal multi-spiral-plate waste heat recovery heating furnace comprises a heating system, a horizontal furnace body, a plurality of spiral plates, a cold air inlet filter and a rear distributor, wherein the horizontal furnace body comprises a high-temperature air front section, a high-temperature air conical section and a high-temperature air rear section which are sequentially communicated from left to right, the cross-sectional diameter of the high-temperature air front section is larger than that of the high-temperature air rear section, a horizontal furnace body outer jacket is sleeved outside the horizontal furnace body, the outer wall of the horizontal furnace body and the inner wall of the horizontal furnace body outer jacket enclose to form a waste heat recovery cavity, the cold air inlet filter is arranged on the end face of the waste heat recovery cavity close to one side of the high-temperature air front section, the horizontal furnace body outer jacket is provided with the plurality of spiral plates at equal intervals, the spiral plates are positioned in the waste heat recovery cavity, cold, the lateral surface of the horizontal furnace body outer jacket is provided with a combustion-supporting air outlet communicated with the interior of the waste heat recovery cavity corresponding to the rear section of the high-temperature air, the front end of the waste heat recovery cavity corresponding to the combustion-supporting air outlet is provided with a rear distributor, the lateral end surface of the horizontal furnace body is provided with a sealing cover, the middle of the sealing cover is provided with a heat supply system communicated with the interior of the horizontal furnace body, the heat supply system is provided with a first combustion-supporting air inlet, the periphery of the sealing cover is provided with an annular air bag box, a group of circular through holes are uniformly distributed on the sealing cover in the circumferential direction, the annular air bag box is communicated with the interior of the front section of the high-temperature air through the circular through holes, the lateral surface of the annular air bag box is provided with a second combustion-supporting air inlet communicated with the interior of the annular air bag box, the end of the high-temperature air rear section, which is far away from the high-temperature air conical section, is provided with a high-temperature air outlet, and the high-temperature air outlet is communicated with the airflow drying equipment through a drying air inlet transition section;

the airflow drying equipment comprises a gas cyclone straight tube type catalyst drying device and an airflow inclined tube, wherein one end of the airflow inclined tube is communicated with the gas cyclone straight tube type catalyst drying device, and the other end of the airflow inclined tube is communicated with a gas-solid separation system.

In one embodiment, the gas cyclone straight tube type catalyst drying device comprises an airflow drying straight tube, a first drying airflow intensifier and a second drying airflow intensifier, one end of the airflow drying straight tube is communicated with the drying air inlet transition section, the other end of the airflow drying straight tube is communicated with the airflow inclined tube, a catalyst feeding system is arranged on the side face of the airflow drying straight tube, and the first drying airflow intensifier and the second drying airflow intensifier are respectively arranged at the lower part and the upper part of the airflow drying straight tube corresponding to the catalyst feeding system.

In one embodiment, the inner wall of the horizontal furnace body is provided with a non-metal refractory lining.

In one embodiment, the bottom of the horizontal furnace body is provided with a saddle support;

the saddle support comprises an internal support part and an external support frame, the external support frame is arranged at the bottom outside the outer jacket of the horizontal furnace body, the internal support part is arranged in the waste heat recovery cavity and right above the external support frame, and the internal support part is in an arc shape;

the inner supporting part comprises an upper top plate, a middle supporting plate and a lower bottom plate which are sequentially arranged from top to bottom, and a group of long circular through holes are uniformly distributed in the middle supporting plate.

In one embodiment, the catalyst feed system comprises a screw conveyor.

In one embodiment, the heating system is a burner.

In one embodiment, the gas cyclone straight tube type catalyst drying device further comprises a vertical support assembly, and the airflow drying straight tube is provided with the vertical support assembly.

In one embodiment, the airflow inclined pipe is provided with at least two horizontal supporting assemblies, and a waveform compensator is arranged between the airflow inclined pipe and each horizontal supporting assembly.

In one embodiment, the side surface of the high-temperature air front section is provided with an inspection manhole, the high-temperature air conical section is provided with a safety device and a first thermometer port, and the high-temperature air rear section is provided with a vent port and a second thermometer port.

The invention has the advantages and beneficial effects that:

the high-temperature air provided by the heat supply system of the invention directly enters the airflow drying equipment for drying the catalyst, and the waste heat generated by the high temperature of the air is used for improving the temperature of combustion air of the burner, thereby saving energy and realizing energy conservation and consumption reduction of the device.

1. The waste heat recovery (horizontal furnace body outer jacket) and the heating furnace body (horizontal furnace body) are of an integrated structure, and the equipment structure and the system plane arrangement of the drying system are optimized.

2. The integrated horizontal multi-spiral-plate waste heat recovery heating furnace adopts the technology of cold wall and hot wall, adopts the non-metal refractory lining to reduce the wall temperature of the heating furnace body, effectively utilizes the waste heat of the heating furnace body for recovery, reduces the overall weight of the equipment, and saves the equipment and the structural investment.

3. According to the integrated horizontal multi-spiral-plate waste heat recovery heating furnace, the plurality of spiral plates are arranged in the waste heat recovery cavity, the spiral plates play a role in flow guiding, the cold air inlet section (namely the end face of the waste heat recovery cavity close to one side of the high-temperature air front section) is provided with the cold air inlet filter, and the hot air outlet section (namely the front end of the waste heat recovery cavity corresponding to the combustion air outlet) is provided with the rear distributor, so that the heat exchange efficiency is improved, the local high-heat dead zone of the internal supporting part of the saddle support is reduced, the waste heat is fully utilized, and the.

4. The spiral plate is arranged on the outer jacket of the horizontal furnace body, and a certain gap is formed between the spiral plate and the outer wall of the horizontal furnace body, so that the outer surface of the horizontal furnace body can keep a fluid circulation state, the heat transfer area is enhanced, the temperature of combustion air is effectively increased, and the energy conservation and emission reduction of the device are realized.

5. The gas cyclone straight tube type catalyst drying device in the airflow drying equipment adopts the patent technology in the utility model CN201320115853.0 'gas cyclone straight tube type catalyst drying device', so that the cyclone and the updraft of a drying heat source exist in a straight tube at the same time, the turbulence among airflows, airflows and physical flows is enhanced, the eddy current vulcanization drying is formed, the heat transfer coefficient and the mass transfer coefficient are improved, the physical flow drying speed is accelerated, the length of the straight tube of the airflow drying equipment is effectively reduced, and the like.

6 the catalyst in the pneumatic drying equipment passes through the gas cyclone straight tube type catalyst drying device, materials are thinned due to centrifugation, shearing and collision and are in a highly dispersed state, the relative speed of gas and solid is high, mass transfer and heat transfer are enhanced, the drying time is short, and excessive drying of the materials is avoided. The drying heat source generates strong rotary motion through the airflow drying equipment, so that the material on the wall of the airflow drying equipment is strongly washed, the phenomenon that the catalyst is adhered to the wall is eliminated, and the moisture content of the product can be controlled through the drying temperature.

Drawings

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

FIG. 2 is a schematic structural diagram of the integrated horizontal multi-spiral plate waste heat recovery heating furnace of the present invention.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a right side view of fig. 2.

Fig. 5 is a view taken along direction a in fig. 2.

Fig. 6 is a sectional view taken along line B-B in fig. 2.

Fig. 7 is a cross-sectional view taken along line C-C of fig. 2.

Fig. 8 is a schematic structural view of the heating system in fig. 2.

Fig. 9 is a schematic structural view of the pneumatic drying device.

Detailed Description

In order to facilitate an understanding of the invention, a full description thereof will be given below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.