CN108826322B - Rotary valve of thermal storage incinerator - Google Patents
Rotary valve of thermal storage incinerator Download PDFInfo
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- CN108826322B CN108826322B CN201810825244.1A CN201810825244A CN108826322B CN 108826322 B CN108826322 B CN 108826322B CN 201810825244 A CN201810825244 A CN 201810825244A CN 108826322 B CN108826322 B CN 108826322B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Multiple-Way Valves (AREA)
Abstract
The invention discloses a rotary valve of a regenerative incinerator, which comprises a rotary power mechanism, a connecting shaft, a gas distribution chamber, a rotor component and a stator component, wherein the rotary power mechanism is arranged on the connecting shaft; the rotary power mechanism drives the rotor part to rotate through the connecting shaft, the gas distribution chamber performs exchange distribution of gas, and gas inlets and gas outlets are formed in different side surfaces of the gas distribution chamber; the rotor part is a cavity and partitions the cavity through a partition plate; the stator component is uniformly partitioned through the partition plate and forms a hollow area; the axial direction and the radial direction of the connecting shaft are provided with related through air holes which are communicated with the gas distribution chamber. The rotary rotor mechanism is driven to rotate by the driving mechanism, so that the valve control resistance is small, the response is quick and flexible, and the processing efficiency of the rotary RTO equipment is improved.
Description
The technical field is as follows:
the invention relates to the technical field of incinerator valves, in particular to a rotary valve special for a regenerative incinerator.
Background art:
RTO (Regenerative Thermal Oxidizer, RTO for short), Regenerative Thermal oxidation decomposer, also called heat accumulating type incinerator. The basic principle of RTO is to oxidize organic waste gas at high temperature (more than or equal to 760 ℃) to generate CO2 and H2O, thereby purifying the waste gas and recovering the heat released during decomposition to achieve the dual purposes of environmental protection and energy saving, and the RTO is an energy-saving and environment-friendly device for treating the high-concentration volatile organic waste gas.
To date, the use of RTO technology in organic exhaust gas treatment has been around 40 years old, now going through a total of three generations: the first generation RTOs were monolithic structures, two-chamber RTOs, with the simplest of one inlet and one outlet for wind flow guidance. The main structure of the two-bed RTO consists of a combustion chamber, two ceramic filler heat storage beds and two switching valves.
The second generation RTO is a valve-switching, i.e., multi-chamber, RTO, which is also the most common type of RTO. The three or more ceramic packed beds change the direction of air flow through the switching of valves, thereby achieving the purpose of preheating VOC waste gas.
The third generation RTO is a rotary RTO, which consists of a combustion chamber, a cylindrical ceramic regenerative bed divided into 12 independent sectors, and a rotary diverter. There are now two forms of rotational RTO: one is to fix the gas flow direction to rotate the heat accumulator, i.e. a light metal material is used as the heat accumulator, or the ceramic heat accumulator with a smaller volume can be made into a disk shape to rotate; the other is that the heat accumulator does not rotate, and a rotary gas distributor with a special structure is adopted to change the flowing direction of the gas. The second form of the rotary RTO, which is the second form, is currently on the market, and the rotary RTO changes the direction of the air flow in different areas of the ceramic heat storage bed through a distributor, thereby continuously preheating the VOC exhaust gas and removing the VOC after the oxidation combustion in the combustion chamber.
The rotary RTO treatment system is a low-concentration organic waste gas treatment system with simple process, small occupied area and low operating cost, mainly adopts advanced rotary valve design technology, airflow distributor and novel ceramic heat storage material, ensures effective recovery of combustion heat through unique design, and has great advantages in the field of large-flow low-concentration organic waste gas purification.
The working principle of the rotary RTO is as follows: set up the cellular board in rotatory RTO's the regenerator, divide into 12 independent sectorial regions with the regenerator bed, wherein 5 sectorial regions belong to the preheating zone that admits air, and 5 sectorial regions belong to the cooling zone that gives vent to anger, and 1 sectorial region is the washing district, and 1 sectorial region in addition is the transition district. The waste gas enters the preheating zone from the bottom through the air inlet distributor, so that the gas enters the combustion chamber at the top after being preheated to a certain temperature and is completely oxidized. The cleaned high temperature gas leaves the oxidation chamber and enters the cooling zone where it transfers heat to the heat storage body and the gas is cooled and discharged through the gas distributor, while the ceramic heat storage body in the cooling zone absorbs heat and "stores" a large amount of heat (for the next cycle to heat the exhaust gas). In order to prevent the unreacted waste gas from entering the purified gas outlet along with the rotation of the heat accumulator, a sector area is arranged as a flushing area before the heat accumulator rotates to the outlet area of the purifier.
By rotation of the rotary valve, the heat storage body is periodically cooled and heated, while the exhaust gas is cooled by the preheating and cleaning device. This is constantly alternating. The 12 sectors can be continuously and circularly switched among heat release, heat accumulation and cleaning to form a cycle, and the cycle is controlled by a rotary valve.
Compared with a bed type RTO, the rotary RTO has the advantages that: (1) the single-platform device can save space and occupy less land; (2) the rotary air flow distributor is adopted to replace a switching valve, so that compressed air can be omitted; (3) the operation and maintenance cost is low, the loss is small, and the operation is simple; (4) because of continuous rotation, no pressure fluctuation is caused; (5) can be adapted to low load or high load exhaust gas flow.
The key of the rotary RTO technology lies in a rotary valve, and the purpose of adopting the rotary valve for the heat accumulating type rotary RTO is to eliminate pressure pulse and fluctuation generated when the flow direction of two-chamber or three-chamber RTO is reversed, so that the flowing stability of airflow is improved. Due to the difference between the domestic and foreign technical levels, the development trend of domestic future rotary RTO is mainly to research a rotary valve which is efficient, stable, low in leakage rate and rapid in response, and if the current technical key can be broken through, the heat accumulating type rotary RTO can be developed more widely in organic waste gas treatment in China.
The invention content is as follows:
the invention aims to overcome the pressure pulse and fluctuation generated when the flow direction of a two-chamber or three-chamber RTO is reversed in the prior art, and the special heat accumulating type rotary RTO valve has good sealing performance, can realize zero leakage and is quick in response.
The technical problem solved by the invention can be realized by adopting the following specific technical scheme: a rotary valve of a regenerative incinerator is characterized in that: the gas distribution device comprises a rotary power mechanism, a connecting shaft, a gas distribution chamber, a rotor component and a stator component; the rotary power mechanism drives the rotor part to rotate through the connecting shaft, the gas distribution chamber performs exchange distribution of gas, and gas inlets and gas outlets are formed in different side surfaces of the gas distribution chamber; the rotor part is a cavity and partitions the cavity through a partition plate; the stator component is uniformly partitioned through the partition plate and forms a hollow area; the axial direction and the radial direction of the connecting shaft are provided with related through air holes, and the air holes of the connecting shaft are communicated with the gas distribution chamber.
In one embodiment, the side surface of the gas distribution chamber is also provided with an access hole, and the bottom of the gas distribution chamber is provided with a cleaning hole and is communicated with the gas outlet of the gas distribution chamber.
In one embodiment, the stator element is disk-shaped and divided into twelve hollow areas by partitions.
In one embodiment, the rotor component is in a shape of a circular truncated cone, the center of the cavity is provided with a valve cylinder shaft, four partition plates are arranged outside along the axial direction of the valve cylinder, and the four partition plates are sequentially divided into four areas, namely a gas inlet area, a flushing area, a gas outlet area and a transition area; mutually communicated air holes are also formed in the axial direction and the radial direction of the valve cylinder shaft, the valve cylinder shaft air holes are communicated with the cavity of the rotor component, the valve cylinder shaft is coaxially connected with the connecting shaft, and the connecting shaft air holes are mutually communicated with the valve cylinder shaft air holes.
In one embodiment, the top surface of the rotor component is provided with air holes or/and air grooves.
In one embodiment, the rotary power mechanism comprises a motor, a gear set and an output shaft, wherein the power of the motor is output by the output shaft after passing through the gear set, and the output shaft is coaxially connected with the connecting shaft barrel.
In one embodiment, a support member for supporting a rotating portion of the rotary valve is provided at the bottom of the rotary valve.
In one embodiment, the support member comprises an air bladder.
In one embodiment the joint area between the rotor part and the stationary part of the rotary valve is provided with a sealing assembly.
In one embodiment, the gas inlet area is 150 degrees, the flushing area is 30 degrees, the gas outlet area is 150 degrees and the transition area is 30 degrees in the 360-degree area of the cavity rotation direction of the rotor component; the bottom of the gas outlet zone is emptied.
Compared with the prior art, the invention has the main beneficial effects that:
(1) the existing rotary RTO realizes air flow distribution operation by switching 12 groups of valves, and has high cost and long response time. The rotary rotor mechanism is driven to rotate by the driving mechanism, so that the valve has small control resistance and quick and flexible response.
(2) The invention adopts the pneumatic control mechanism and a series of sealing elements, has good sealing effect of the rotary valve, can basically realize zero leakage, effectively eliminates pressure pulse and fluctuation generated when the RTO flow direction of two chambers or three chambers is reversed, and improves the treatment efficiency of the rotary RTO equipment.
(3) The top surface of the rotating rotor is provided with a large number of gas circulation channels, and the processing efficiency of the rotating RTO equipment is effectively improved by utilizing the fluidity of gas flow.
(4) In the invention, the gas distribution chamber, the rotor component, the stator component, the rotary power mechanism and the like of the rotary valve are relatively independent structural components, so that the components are convenient to mount and can be maintained and nursed without being disassembled.
(5) The rotary valve has the advantages of simple structure, stable operation, high temperature resistance, wear resistance, good sealing effect, long service life, convenient operation, easy maintenance and nursing and the like.
Description of the drawings:
the above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
FIG. 1 is a schematic longitudinal sectional view of a rotary valve of a regenerative thermal oxidizer according to an embodiment of the present invention;
FIG. 2 is a schematic longitudinal sectional view of FIG. 1 after rotation through 90;
FIG. 3 discloses a front view of a stator component in an embodiment of the invention;
FIG. 4 illustrates a schematic view of a gas distribution chamber according to an embodiment of the present invention;
FIG. 5 illustrates a schematic view of a rotor assembly according to an embodiment of the present invention;
FIG. 6 illustrates a schematic view of rotor component zones according to an embodiment of the present invention;
FIG. 7 is a schematic view of a rotary power mechanism according to an embodiment of the present invention;
FIG. 8 discloses an enlarged partial view of the sealing structure of section A of FIG. 2;
fig. 9 discloses a partially enlarged schematic view of the sealing structure of part B of fig. 2.
Referring to fig. 1 in conjunction with fig. 2 to 9, the rotary valve of the regenerative incinerator in the present embodiment includes a rotary power mechanism 1, a connecting shaft 2, a gas distribution chamber 3, a rotor member 4, and a stator member 5; the rotary power mechanism 1 drives the rotor part 4 to rotate through the connecting shaft 2, the gas distribution chamber 3 performs exchange distribution of gas, and the gas inlet 31 and the gas outlet 32 are formed in different side surfaces of the gas distribution chamber 3; the rotor part 4 is a cavity, and the cavity is partitioned by a partition plate 42; the stator part 5 is uniformly partitioned by the partition plate 51 and forms a hollow area 52; the axial direction and the radial direction of the connecting shaft 2 are provided with related through air holes 21, and the connecting shaft air holes 21 are communicated with the gas distribution chamber 3.
Preferably, in this embodiment, the gas distribution chamber 3 is further opened with an access opening 33 on a side surface thereof, and is opened with a cleaning opening 34 at a bottom thereof to communicate with the gas outlet 32 of the gas distribution chamber.
Referring to fig. 4, it can be understood that the gas distribution chamber in this embodiment has a square cylindrical shape, and the gas inlet 31, the gas outlet 32 and the purge port 34 of the gas distribution chamber 3 have a flanged shape, so as to be easily assembled with the flanged ports of the corresponding pipes. The air inlet 31 and the air outlet 32 are oppositely arranged in a 180-degree direction, and the access opening 33 is arranged in a 90-degree direction with the air inlet. The maintenance of the access opening 33 is used for subsequent operations such as protection and maintenance of the rotary transmission. The top of the gas distribution chamber 3 is provided with a furnace body connecting flange 35 which is used for supporting the upper furnace body and is fixed by bolts at the periphery, thus ensuring the sealing performance of the equipment.
Referring to fig. 3, as a preferred embodiment, the stator part 5 is disc-shaped, and is divided into twelve hollow areas 52 by the partition plate 51, and divided into areas B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, and B12, the central circular hole 53 of the stator part is connected with the rotor part 2 by the bearing 54, the central circle is provided with the bolt hole 55 for fixing with the furnace regenerator, and the periphery of the stator part is fixed with the furnace regenerator by the pressing plate.
Preferably, the rotor member 4 is circular truncated cone-shaped, the center of the cavity is provided with a valve cylinder shaft 41, four partition plates 42 are arranged outwards along the valve cylinder shaft 41, and the four partition plates are divided into four areas, namely a gas inlet area 43, a flushing area 44, a gas outlet area 45 and a transition area 46; mutually-communicated air holes 47 are also formed in the axial direction and the radial direction of the valve cylinder shaft 41, the valve cylinder shaft air holes are communicated with the cavity of the rotor component 4, the valve cylinder shaft 41 is coaxially connected with the connecting shaft 2, and the connecting shaft air holes are mutually communicated with the valve cylinder shaft air holes.
It will be appreciated that the valve cylinder shaft 41 is coaxially connected to the connection shaft 2 to prevent unreacted exhaust gas from entering the outlet port as the regenerator rotates, and that this portion of exhaust gas is directed to the purge passage 36 by the gas flow movement before the regenerator rotates to the outlet port 32 to improve the efficiency of the plant process.
Because the valve cylinder shaft 41 is coaxially connected with the connecting shaft 2, the whole rotor part 4 is driven to rotate, and the purpose of air flow distribution is achieved.
Preferably, in this embodiment, the top surface of the rotor part 4 is provided with air holes and/or air grooves.
Referring to fig. 7, as a preferred embodiment, the rotational power mechanism 1 includes a speed reducer 11, a transmission gear 12, a driven gear 13, an output shaft 14, and a bearing device 15 connected to the lower end of the output shaft 14, wherein the output shaft 14 is coaxially connected to the connecting shaft 2.
Preferably, the bottom of the rotary valve is provided with a supporting part 6 for supporting the rotary part of the rotary valve, and the supporting part 6 is used for supporting the whole rotary part of the rotary valve and is connected with the furnace body in a supporting way.
As a preference of the present embodiment, the support member 6 mainly includes an airbag. The air bag adjusts the lifting and balancing of the rotary valve through the pressure of compressed air.
Preferably, the joint area between the rotating part and the stationary part of the rotary valve is provided with a sealing assembly 7.
The sealing assembly 7 is used for effectively improving the treatment efficiency of equipment, and because the clearance between the rotor part and the stator part is adjusted to be about 1mm through the supporting part, a gas hole and a gas groove are formed in the top surface of the rotor part, in the rotating process of the rotor part, gas of the outer side fan passes through a pipeline and a cleaning opening of the gas distribution chamber and is connected to the gas hole of the connecting shaft, and then the gas hole of the valve cylinder shaft of the rotor part is communicated with the gas hole and/or the gas groove in the top surface of the rotor part, so that in the rotating process of the rotor part, the problem of wind cross of all areas of the rotor part and the stator part is sucked out again through negative pressure. 4 air hole channels can be arranged on the valve cylinder shaft and communicated with the gas distribution chamber, and the leaked waste gas can be sucked out by negative pressure, and meanwhile, a piston ring is adopted for sealing between the valve cylinder shaft and the gas distribution chamber.
Preferably, in the area of 360 degrees of the cavity rotation direction of the rotor component, the gas inlet area occupies 150 degrees, the flushing area occupies 30 degrees, the gas outlet area occupies 150 degrees, the transition area occupies 30 degrees, and the bottom of the gas outlet area is emptied.
Referring to fig. 8, fig. 8 is a partial schematic view of a sealing structure between the rotor member and the gas distribution chamber, wherein a fixing seat 37 is installed on the gas distribution chamber 3, a fixing seat 48 is also installed on the outer side of the rotor member 4, and a piston ring 71 is installed between the gaps of the gas distribution chamber fixing seat 37 and the rotor member fixing seat 48.
Referring to fig. 9, fig. 9 is a partial schematic view of a sealing structure between a connecting shaft and a gas distribution chamber. The gas distribution chamber is provided with a fixed seat 38, and a piston ring 72 is arranged between the fixed seat 38 of the gas distribution chamber and a gap of the connecting shaft 2.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (1)
1. A rotary valve of a regenerative incinerator is characterized in that: the gas distribution device comprises a rotary power mechanism, a connecting shaft, a gas distribution chamber, a rotor component and a stator component; wherein the content of the first and second substances,
the rotary power mechanism drives the rotor part to rotate through the connecting shaft, the gas distribution chamber performs exchange distribution of gas, and gas inlets and gas outlets are formed in different side surfaces of the gas distribution chamber;
the rotor part is a cavity and partitions the cavity through a partition plate; the stator component is uniformly partitioned through the partition plate and forms a hollow area;
the axial direction and the radial direction of the connecting shaft are provided with related through air holes which are communicated with the gas distribution chamber;
the rotor component is in a circular truncated cone shape, the center of the cavity is provided with a valve cylinder shaft, four partition plates are arranged outside along the axial direction of the valve cylinder and divided into four areas, namely a gas inlet area, a flushing area, a gas outlet area and a transition area;
mutually communicated air holes are also formed in the axial direction and the radial direction of the valve cylinder shaft, the valve cylinder shaft air hole is communicated with the cavity of the rotor component, the valve cylinder shaft is coaxially connected with the connecting shaft, and the connecting shaft air hole is mutually communicated with the valve cylinder shaft air hole; the side surface of the gas distribution chamber is also provided with an access hole, and the bottom of the gas distribution chamber is also provided with a cleaning hole and communicated with a gas outlet of the gas distribution chamber;
the stator component is disc-shaped and is divided into twelve hollow areas by the partition boards; the top surface of the rotor part is provided with air holes or/and air grooves; the rotating power mechanism comprises a motor, a gear set and an output shaft, the power of the motor is output by the output shaft after passing through the gear set, and the output shaft is coaxially connected with the connecting shaft; the bottom of the rotary valve is provided with a supporting component for supporting the rotary part of the rotary valve;
the support member includes an airbag; a sealing assembly is arranged in a combination area between the rotor part and the fixed part of the rotary valve;
in a 360-degree area of the cavity rotating direction of the rotor component, a gas inlet area occupies 150 degrees, a flushing area occupies 30 degrees, a gas outlet area occupies 150 degrees and a transition area occupies 30 degrees; the bottom of the gas outlet zone is emptied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825244.1A CN108826322B (en) | 2018-07-25 | 2018-07-25 | Rotary valve of thermal storage incinerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810825244.1A CN108826322B (en) | 2018-07-25 | 2018-07-25 | Rotary valve of thermal storage incinerator |
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| Publication Number | Publication Date |
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| CN108826322A CN108826322A (en) | 2018-11-16 |
| CN108826322B true CN108826322B (en) | 2020-07-07 |
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| CN201810825244.1A Active CN108826322B (en) | 2018-07-25 | 2018-07-25 | Rotary valve of thermal storage incinerator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469912B (en) * | 2018-11-29 | 2024-06-11 | 崔鹰 | Distribution valve and heat accumulating type thermal incinerator |
| CN110454801B (en) * | 2019-09-11 | 2024-05-31 | 浙江华跃环境科技有限公司 | Low wind resistance self-sealing rotary valve for RTO of thermal oxidation furnace |
| CN110939940A (en) * | 2019-12-09 | 2020-03-31 | 上海兰宝环保科技有限公司 | Waste gas purification and waste heat recovery method and device thereof |
| CN115899725B (en) * | 2023-02-03 | 2023-05-23 | 山西鑫瑞华机电设备有限公司 | RTO equipment with external reversing valve |
| CN116182169B (en) * | 2023-02-13 | 2024-03-12 | 苏州天迎蓝智能环保科技有限公司 | Plunger heat accumulating type waste gas incinerator |
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| CN206488288U (en) * | 2017-01-23 | 2017-09-12 | 力技科技工程股份有限公司 | The continous way rotary valve of TREATMENT OF VOCs system |
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