阅读说明：本技术 一种干湿分离热风穿透干燥设备及工艺 (Dry-wet separation hot air penetration drying equipment and process ) 是由 王升朝 于 2020-08-28 设计创作，主要内容包括：本发明公开了一种干湿分离热风穿透干燥设备及工艺,涉及造纸设备技术领域,包括机架、烘缸、罩体,罩体分为干部气罩、湿部气罩,机架上设置有热风分级循环单元,包括湿部集气罩和干部集气罩,烘缸与湿部集气罩和干部集气罩间设置有导气组件,机架上于湿部集气罩和干部集气罩处设有热风循环组件,干部气罩、湿部气罩方便热风循环组件促使热风在干部和湿部循环,设置导气组件便于烘缸将穿透的热风通过湿部集气罩和干部集气罩对烘干热风尾气根据干湿进行分级,方便干燥热风循环利用和湿热热风循环利用,也方便湿热热风进行排湿,其热风干燥热风循环利用率较高,干湿分级,整个过程做到干湿分离,有利于热风循环利用,提高干燥效率,提升产能。(The invention discloses a dry-wet separation hot air penetration drying device and a process, which relate to the technical field of papermaking equipment and comprise a frame, a drying cylinder and a cover body, wherein the cover body is divided into a dry part air hood and a wet part air hood, a hot air grading and circulating unit is arranged on the frame and comprises a wet part gas hood and a dry part gas hood, an air guide assembly is arranged between the drying cylinder and the wet part gas hood as well as between the drying cylinder and the dry part gas hood, a hot air circulating assembly is arranged on the frame at the positions of the wet part gas hood and the dry part gas hood, the dry part gas hood and the wet part gas hood facilitate the hot air circulating assembly to promote the circulation of hot air at the dry part and the wet part, the air guide assembly is arranged to facilitate the drying cylinder to lead the penetrated hot air to pass through the wet part gas hood and the dry part gas hood to grade the dried hot air tail gas according to the dry and wet hot, and dry-wet classification, dry-wet separation is realized in the whole process, hot air recycling is facilitated, drying efficiency is improved, and productivity is improved.)

1. A dry-wet separation hot air penetration drying device comprises a frame (1), wherein a drying cylinder (2) and a cover body (3) are arranged on the frame (1), it is characterized in that the cover body (3) is divided into a dry part air cover (4) and a wet part air cover (5) which have the same structure along the transmission direction of the materials to be dried, the dry end air hood (4) and the wet end air hood (5) are covered on two sides of the drying cylinder (2), the machine frame (1) is provided with a hot air grading circulation unit which comprises a wet part gas-collecting hood (7) and a dry part gas-collecting hood (8) which are vertically arranged at the same end of the wet part gas hood (5) and the dry part gas hood (4) along the end surface, an air guide component (9) is arranged between the drying cylinder (2) and the wet part gas-collecting hood (7) and the dry part gas-collecting hood (8), and hot air circulation components are arranged on the frame (1) at the wet part gas-collecting hood (7) and the dry part gas-collecting hood (8).

2. The through-air drying device for the dry-wet separation of hot air according to claim 1, characterized in that the air guide assembly (9) comprises air holes (10) formed in the outer peripheral wall of the drying cylinder (2), an air guide inclined plate (11) is arrayed in the drying cylinder (2) below the air holes (10), the air guide inclined plate (11) and the inner wall of the drying cylinder (2) form an air guide cavity (12), and the air guide cavity (12) is opened towards the wet part gas hood (7) and the dry part gas hood (8).

3. The through-air drying equipment for dry-wet separation according to claim 2, wherein a plurality of wet air grading pipes (14) are arranged on the wet part gas-collecting hood (7) at the opening facing the air-guiding chamber (12), a plurality of dry air grading pipes (15) are arranged on the dry part gas-collecting hood (8) at the opening facing the air-guiding chamber (12), and the wet air grading pipes (14) and the dry air grading pipes (15) are communicated with the hot air circulation component.

4. The through-air drying device for dry-wet separation according to claim 3, characterized in that the hot air circulation assembly comprises a dry air heat exchange filter (16) arranged on the rack (1), the dry air heat exchange filter (16) is communicated with an external heat source, a dry air circulating fan (18) is connected to the output end of the dry air heat exchange filter (16), the output end of the dry air circulating fan (18) is communicated with the input end of a dry air collecting hood (8), and the dry air classification pipe (15) is communicated with the input end of the dry air heat exchange filter (16).

5. The through-air drying device for dry-wet separation and hot air according to claim 4, characterized in that the hot air circulation assembly further comprises a wet-end air heat exchange filter (20) arranged on the frame (1), the wet-end air heat exchange filter (20) is communicated with an external heat source, a wet-end circulating fan (22) is connected to an output end of the wet-end air heat exchange filter (20), an output end of the wet-end circulating fan (22) is communicated with an input end of the wet-end gas collecting hood (7), the wet-air classification pipe (14) is communicated with an input end of the wet-end air heat exchange filter (20), and the dry-air classification pipe (15) is further communicated with an input end of the wet-end air heat exchange filter (20).

6. The dry-wet separation through-air drying device according to claim 5, wherein a main air filter (23) is arranged on the frame (1), an air-air heat exchanger (24) is arranged on the main air filter (23), the wet air classifying pipe (14) is further communicated with the air-air heat exchanger (24), a moisture exhaust air pipe (25) is arranged at an output end of the air-air heat exchanger (24), a moisture exhaust fan (26) is arranged on the moisture exhaust air pipe (25), an air inlet pipe (27) and a preheated air conveying pipe (28) are arranged on the main air filter (23), and the preheated air conveying pipe (28) is communicated with an input end of the dry air heat exchange filter (16).

7. The through-air drying installation according to claim 3, characterized in that annular sealing baffles (13) which are open towards the air conducting chamber (12) are arranged in the wet part gas hood (7) and the dry part gas hood (8), and the wet air classifier (14) and the dry air classifier (15) open into the sealing baffles (13).

8. A dry-wet separation through-air drying process matched with the dry-wet separation through-air drying equipment of claims 1-7, comprising the following steps;

s1, preheating the device, and starting the wet part air heat exchange filter (20) and the dry part air heat exchange filter (16);

s2, feeding wet materials, opening the drying cylinder (2), the dry part air hood (4) and the wet part air hood (5), supplying air by the dry part air hood (4) and supplying air by the wet part air hood (5);

s3: the wet part is circularly started, the air inlet and air temperature of the wet part air cover (5) is controlled, the dry part is circularly started, and the air inlet and air temperature of the dry part air cover (4) is controlled;

s4: the air inlet amount of the dry part air hood (4) and the wet part air hood (5) is controlled;

s5: the exhaust gas of the dry part gas-collecting hood (8) is classified, the wet and hot exhaust gas of the dry part gas-collecting hood (8) is partially mixed with fresh air in the main air filter (23) and then is reheated for circulation of the dry part gas-collecting hood (4), and partially for circulation of the wet part gas-collecting hood (5);

and S6, tail gas of the wet-end gas-collecting hood (7) is classified, and the wet-hot tail gas of the wet-end gas-collecting hood (7) is partially mixed with the dry-end wet-hot tail gas and then is reheated for circulation of the wet-end gas-collecting hood (5), and partial moisture is discharged.

9. The through-air drying process for dry-wet separation and hot-air drying according to claim 8, characterized in that the dry air hood (4) and the wet air hood (5) are controlled by setting the air inlet temperature of the dry air hood (4) and the wet air hood (5), and sending temperature signals to the dry air heat exchange filter (16) and the wet air heat exchange filter (20) through the controller to adjust the heat source, so as to control the air inlet temperature of the dry air hood (4) and the wet air hood (5).

10. The through-air drying process for separating dry air from wet air according to claim 8, wherein the step of controlling the tail gas from the wet-end gas-collecting hood (7) by stage moisture removal comprises the steps of setting the temperature and the relative humidity of the moisture-removing air, transmitting a temperature and humidity signal to the moisture-removing fan (26) and controlling the moisture-removing air volume.

Technical Field

The invention relates to the technical field of papermaking equipment, in particular to the field of drying equipment.

Background

Toilet paper is not a simple paper product and has become a genuine personal consumer product. The winner of the competition for profit and market share in the toilet paper industry is the company that sells products such as toilet paper for personal consumption. The advent of roll toilet paper itself, plus dyeing, embossing, printing and packaging, is all a tool for improving sensory value. Thus, the price is not dependent on weight but on the quality and organoleptic properties of the product. Theoretically, toilet paper should be soft and tough. However, these two criteria are difficult to satisfy simultaneously. Soft toilet paper creped by the spin-drying method tends to have poor strength.

The technology of hot air drying (TAD) is rapidly developing and has advanced to the maturity stage. Consumer expectations continue to grow for quality toilet tissue and towel products, and TAD technology is the most practical process for producing these products. The recent increase in the use of TAD machines has proven that this technology is maturing and becoming a major equipment in the production of toilet paper. In the conventional TAD through-air drying, hot air with the same quality is sent to a wet part air hood and a dry part air hood of a TAD process through a fan, the hot air passes through a drying substance on the surface of a TAD cylinder, hot and humid air generated by the wet part and the hot and humid air generated by the dry part are mixed together in the TAD cylinder and are exhausted from an exhaust hood opening of the TAD cylinder, part of the exhausted hot and humid air is mixed with fresh air and then is heated and recycled, and part of the exhausted hot and humid air is exhausted.

If the Chinese utility model with the publication number of CN2704604Y discloses a penetration type hot air drying box, which is a paper drying device and mainly comprises a hollow drying cylinder, wherein the cylinder shaft is connected with a motor through a transmission mechanism, a plurality of air holes are distributed on the cylinder wall of the drying cylinder, a C-shaped air hood with a hollow inner cavity is wound outside the cylinder, and a plurality of air jet holes are distributed on the C-shaped arc cylinder wall of the air hood opposite to the cylinder; one end of the C-shaped gas hood is provided with an air inlet, the other end of the C-shaped gas hood is provided with a gas collecting hood, and the gas collecting hood is provided with an air outlet. The utility model discloses the advantage: adopt the utility model discloses can change traditional paper and squeeze surface formula drying process for penetrating type drying process, make paper fibre become three-dimensional solid by two-dimensional planar arrangement and arrange, improve fibre bulking rate and utilization ratio.

Its existence of above-mentioned prior art is by wet portion water of dry material content in dry cylinder input part branch high, the cadre output moisture content of dry cylinder is low, and its hot-blast through-air drying adopts same quality hot-blast, and its hot-blast water content in dry cylinder input is higher, and is low at dry cylinder output moisture content, and moist hot-air and dry air mix discharges at the air exit, and hot air drying heated air circulation utilization is lower, and the energy consumption is great.

Disclosure of Invention

The invention aims to: in order to solve the technical problems that the hot air circulation utilization rate of hot air drying is low and tail gas hot air cannot be effectively utilized, a dry-wet separation hot air penetration drying device and a process are provided.

The invention specifically adopts the following technical scheme for realizing the purpose:

the utility model provides a dry-wet separation hot-blast through drying equipment, includes the frame, be equipped with dryer, the cover body in the frame, the cover body divide into the same cadre gas hood of structure, wet portion gas hood along treating dry material transmission direction, cadre gas hood with wet portion gas hood cover is located the dryer both sides, be equipped with hot-blast hierarchical circulation unit in the frame, hot-blast hierarchical circulation unit is including locating wet portion gas hood and cadre gas hood that the same end of cadre gas hood set up perpendicularly along the terminal surface, the dryer with wet portion gas hood with be equipped with the air guide subassembly between cadre gas hood, in the frame wet portion gas hood and cadre gas hood department are equipped with the hot air circulation subassembly.

Through the above scheme, it divide into the cover body cadre gas hood, wet portion gas hood makes things convenient for the heated air circulation subassembly to make hot-blast circulation at cadre and wet portion circulation, it will pierce through hot-blast through wet portion gas collecting channel and cadre gas collecting channel to classify to the hot-blast tail gas of stoving according to doing wet to set up the gas guide subassembly dryer of being convenient for, make things convenient for dry heated air circulation to utilize and damp-hot air circulation to utilize, also make things convenient for damp-hot air to carry out the hydrofuge, its hot air drying heated air circulation utilization ratio is higher, it is hierarchical to do wet, it is effectual to dry, the wet separation is accomplished to whole process, be favorable to heated.

Furthermore, the air guide assembly comprises air holes formed in the peripheral wall of the drying cylinder, air guide inclined plates are arrayed below the air holes in the drying cylinder, the air guide inclined plates and the inner wall of the drying cylinder form an air guide cavity, and the opening of the air guide cavity faces the wet part gas collecting hood and the dry part gas collecting hood.

Through above-mentioned scheme, set up the bleeder vent and make things convenient for the hot-blast paper that pierces through in cadre gas hood, the wet portion gas hood to penetrate into the dryer, hot-blast entering air guide cavity afterwards, by the guide of air guide swash plate, hot-blast air gets into wet portion gas collecting channel and cadre gas collecting channel from the air guide cavity, conveniently grades and the water conservancy diversion utilizes hot-blast tail gas.

Furthermore, a plurality of wet air grading pipes are arranged on the wet part gas collecting hood opposite to the opening of the gas guide cavity, a plurality of dry air grading pipes are arranged on the dry part gas collecting hood opposite to the opening of the gas guide cavity, and the wet air grading pipes and the dry air grading pipes are communicated with the hot air circulation component.

Through above-mentioned scheme, set up the wet wind hierarchical pipe and conveniently grade the wet wind, conveniently extract the wet wind of different humidity, set up the dry wind hierarchical pipe simultaneously and grade the dry wind that cadre gas hood produced, make things convenient for the heated air circulation subassembly to carry out mixing cyclic utilization in grades to dry wind and wet wind simultaneously, at dry wind tail gas part cadre inner loop, the part gets into wet portion and circulates.

Furthermore, the hot air circulation assembly comprises a dry air heat exchange filter arranged on the rack, the dry air heat exchange filter is communicated with an external heat source, the output end of the dry air heat exchange filter is connected with a dry circulating fan, the output end of the dry circulating fan is communicated with the input end of a dry gas collecting hood, and the dry air grading pipe is communicated with the input end of the dry air heat exchange filter.

Through the scheme, the dry air heat exchange filter is communicated with an external heat source to conveniently exchange heat, dry air can be supplied to the dry air hood independently, the dry-wet separation effect is good, meanwhile, the dry circulating fan can extract the tail gas of the dry air hood to form dry gas internal circulation, meanwhile, the dry air grading pipe is communicated with the input end of the dry air heat exchange filter, and the air input into the air heat exchange filter can be preheated to fully utilize heat energy.

Furthermore, the hot air circulation assembly further comprises a wet part air heat exchange filter arranged on the rack, the wet part air heat exchange filter is communicated with an external heat source, the output end of the wet part air heat exchange filter is connected with a wet part circulating fan, the output end of the wet part circulating fan is communicated with the input end of a wet part gas collecting hood, the wet air grading pipe is communicated with the input end of the wet part air heat exchange filter, and the dry air grading pipe is communicated with the input end of the wet part air heat exchange filter.

Through the scheme, wet portion air heat transfer filter makes things convenient for the heat transfer with outside heat source intercommunication, can supply hot-blastly to wet portion air shroud alone, it is effectual to do wet separation, wet portion circulating fan can draw wet portion gas collecting channel tail gas simultaneously, form wet portion gas internal circulation, wet air grading pipe and wet portion air heat transfer filter input intercommunication simultaneously, can preheat the air of input air heat transfer filter, make full use of heat energy, dry air grading pipe still communicates with wet portion air heat transfer filter input simultaneously, can let in wet portion air heat transfer filter and mix with the wet wind with partial dry hot-blast dry wind, let in wet portion air shroud after dry and wet mixing, be convenient for reduce wet portion wet wind water content.

Further, be equipped with main air cleaner in the frame, be equipped with the gas-gas heat exchanger on the main air cleaner, wet wind hierarchical pipe still with the gas-gas heat exchanger intercommunication, gas-gas heat exchanger output is equipped with the hydrofuge tuber pipe, be equipped with the hydrofuge fan on the hydrofuge tuber pipe, be equipped with air intake pipe and preheated air duct on the main air cleaner, preheated air duct lets in cadre air heat transfer filter input.

Through above-mentioned scheme, main air cleaner is convenient for filter the outside air, and the hierarchical pipe of gas-gas heat exchanger accessible damp wind simultaneously advances the heat transfer with the heat energy of damp wind and outside air, and the make full use of damp wind tail gas preheats the outside air, and the air of preheating lets in dry part air heat transfer filter input and gets into dry part circulation by preheating air conveying pipe, and the fan of hydrofuge is opened, and unnecessary damp wind tail gas is discharged away through the hydrofuge tuber pipe.

Furthermore, annular sealing baffles facing the openings of the air guide cavity are arranged in the wet part gas collecting hood and the dry part gas collecting hood, and the wet air classification pipe and the dry air classification pipe are communicated into the sealing baffles.

Through above-mentioned scheme, set up sealing baffle, when the dryer rotated, sealing baffle sheltered from the air guide chamber, reduced hot-blast loss, wet wind classifying pipe and dry air classifying pipe simultaneously lead to in the sealing baffle, the convenience is just drawing hot-blastly to the air guide chamber.

A dry-wet separation hot air penetration drying process comprises the following steps;

s1, preheating the device, and starting a wet part air heat exchange filter and a dry part air heat exchange filter;

s2, feeding wet materials, opening a drying cylinder, a dry part air cover and a wet part air cover, supplying air by the dry part air cover and supplying air by the wet part air cover;

s3: the wet part is circularly started, the air inlet temperature of the wet part air hood is controlled, the dry part is circularly started, and the air inlet temperature of the dry part air hood is controlled;

s4: controlling the air inlet quantity of the dry part air hood and the wet part air hood;

s5: the tail gas of the dry part gas-collecting hood is classified, the wet and hot tail gas of the dry part gas-collecting hood is partially mixed with fresh air in a main air filter and then is reheated for dry part gas-collecting hood circulation, and part of the wet part gas-collecting hood is used for wet part gas-collecting hood circulation;

and S6, tail gas of the wet-end gas-collecting hood is classified, and the wet-hot tail gas of the wet-end gas-collecting hood is mixed with the wet-hot tail gas of the dry part and then is reheated for circulation of the wet-end gas-collecting hood, and partial moisture is discharged.

Through the scheme, wet materials are conveyed to the outer wall of the drying cylinder along feeding, the wet materials enter the wet part air cover, an external heat source exchanges heat from the wet part air heat exchange filter, the wet part circulating fan is started, the wet part air cover circularly supplies air, hot air of the wet part air cover penetrates the wet materials to enter the drying cylinder at the moment, wet air tail gas is guided into the wet air grading pipe from the air guide cavity and then is guided into the wet part air heat exchange filter, the wet part circular air supply is completed, redundant wet hot air enters the main air filter and the air heat exchanger for heat exchange, the wet air is discharged by starting the wet exhaust fan after waste heat is recovered, meanwhile, after the wet materials enter the dry part air cover, the dry part air heat exchange filter further heats preheated external air by the heat source, the dry part circulating fan is started to supply hot air to the dry part air cover, the dry part hot air tail gas is guided into the dry part air grading pipe and then is guided into the dry part air heat exchange filter for cyclic utilization, the wet portion air cover that lets in after dry and wet mixing is convenient for reduce wet portion wet wind water content, and the wet separation of doing is accomplished to whole process, is favorable to heated air circulation to utilize, improves drying efficiency, promotes the productivity.

And further, the air inlet air temperature control steps of the dry part air cover and the wet part air cover are as follows, the air inlet air temperature of the dry part air cover and the air inlet air temperature of the wet part air cover are set, temperature signals are transmitted to the dry part air heat exchange filter and the wet part air heat exchange filter through the controller to adjust heat sources, and the air inlet air temperature of the dry part air cover and the air inlet air temperature of the wet part air cover are controlled.

Furthermore, the step of controlling the tail gas of the gas collecting hood of the wet part to exhaust moisture in a grading way comprises the following steps of setting the temperature and the relative humidity of the exhaust moisture air, transmitting a temperature and humidity signal to the exhaust moisture fan and controlling the exhaust moisture air quantity.

The invention has the following beneficial effects:

1. according to the invention, the cover body is divided into the dry part gas cover and the wet part gas cover, so that the hot air circulation component can promote the circulation of hot air at the dry part and the wet part, the gas guide component is arranged, so that the drying cylinder can classify the penetrating hot air through the wet part gas collecting cover and the dry part gas collecting cover according to the dryness and the wetness of the tail gas of the dried hot air, the drying hot air circulation utilization and the wet hot air circulation utilization are convenient, the wet hot air is convenient to discharge the humidity, the hot air drying hot air circulation utilization rate is higher, the dryness and the wetness are classified, the drying effect is good, the dryness and the wetness separation are realized in the whole process, the;

2. the wet part air heat exchange filter is communicated with an external heat source to facilitate heat exchange, hot air can be supplied to the wet part air hood independently, the dry-wet separation effect is good, meanwhile, the wet part circulating fan can extract tail gas of the wet part gas hood to form wet part air internal circulation, meanwhile, the wet air grading pipe is communicated with the input end of the wet part air heat exchange filter to preheat air input into the air heat exchange filter and fully utilize heat energy, meanwhile, the dry air grading pipe is also communicated with the input end of the wet part air heat exchange filter to introduce partial dry hot air into the wet part air heat exchange filter and mix with wet air, the dry air and the wet air are mixed and then introduced into the wet part air hood to reduce the moisture content of the wet air of the wet part, the main air filter is convenient for filtering external air, meanwhile, the air heat exchanger can exchange heat energy of the wet air with the external air through the wet air grading pipe and fully utilize the wet air tail gas to preheat, the preheated air is introduced into the input end of the dry part air heat exchange filter from the preheated air conveying pipe and enters dry part circulation, the moisture exhaust fan is started, and redundant wet air tail gas is exhausted through the moisture exhaust air pipe;

3. the wet material is conveyed to the outer wall of the drying cylinder along the feeding direction, the wet material enters a wet part air cover, an external heat source exchanges heat from a wet part air heat exchange filter, a wet part circulating fan is started to circularly supply air to the wet part air cover, hot air of the wet part air cover penetrates through the wet material and enters the drying cylinder at the moment, wet air tail gas is guided into a wet air grading pipe from an air guide cavity and then is guided into the wet part air heat exchange filter to finish the circular air supply of the wet part, redundant wet hot air enters a main air filter and the air heat exchanger to exchange heat, a moisture exhaust fan is started to exhaust the wet air after waste heat is recovered, meanwhile, after the wet material enters a dry part air cover, the dry part air heat exchange filter further heats the preheated external air by the heat source, the dry part circulating fan is started to provide hot air for the dry part air cover, the dry part hot air tail gas is guided into the dry part air grading pipe and then is guided into the, the wet portion air cover that lets in after dry and wet mixing is convenient for reduce wet portion wet wind water content, and the wet separation of doing is accomplished to whole process, is favorable to heated air circulation to utilize, improves drying efficiency, promotes the productivity.

Drawings

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

FIG. 2 is a schematic view of the construction of the dryer and hood portions of the present invention;

fig. 3 is a schematic sectional view of a dryer section according to the present invention.

Reference numerals: 1. a frame; 2. a drying cylinder; 3. a cover body; 4. a dry gas hood; 5. a wet end air hood; 7. a wet end gas collection hood; 8. a dry part gas-collecting hood; 9. an air guide assembly; 10. air holes are formed; 11. an air guide inclined plate; 12. a gas conducting cavity; 13. sealing the baffle; 14. a wet air classification pipe; 15. a dry air classification pipe; 16. a dry air heat exchange filter; 17. a dry hot air heat source; 18. a dry part circulating fan; 20. a wet end air heat exchange filter; 21. a wet end hot air heat source; 22. a wet-end circulating fan; 23. a primary air filter; 24. a gas-gas heat exchanger; 25. a moisture removal air duct; 26. a moisture removal fan; 27. an air inlet pipe; 28. preheating an air conveying pipe; 29. and a material guide roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.