CN202618244U - Thin-plate tobacco strip baking machine capable of reducing head-tail loss of tobacco strips - Google Patents

Abstract

The utility model relates to a thin-plate tobacco strip baking machine capable of reducing the head-tail loss of tobacco strips. The thin-plate tobacco strip baking machine comprises a tobacco strip baking barrel and a hot air pipeline communicated with the tobacco strip baking barrel, wherein a steam atomization water humidification device is arranged at a hot air inlet of the hot air pipeline and comprises a high-pressure water path, a high-temperature saturated steam pipeline and a nozzle connected with the high-pressure water path and the high-temperature saturated steam pipeline; and the nozzle is arranged in the hot air pipeline. According to the utility model, the conventional thin-plate tobacco strip baking machine is improved; the steam atomization water humidification device is arranged at the hot air inlet of the hot air pipeline; after improvement, a water process control graph of the outlet of the baking machine is sampled from a central control room and is compared with that of the baking room before improvement; the time for baking heat-tail waste tobacco strips is shortened; the change tendency is transitioned steadily; after improvement, the structure of a product is stable, and the moisture content is qualified; and the quality of the product is obviously improved. According to technical measurement, the head-tail loss is reduced from about 50 kilograms of each batch to lower than 3 kilograms; and a research result shows that the thin-plate tobacco strip baking machine can be popularized in the tobacco processing industry.

Description

A kind ofly can reduce the pipe tobacco thin plate cut-tobacco drier of loss end to end

Technical field

The utility model relates to a kind ofly can reduce the pipe tobacco thin plate cut-tobacco drier of loss end to end.

Technical background

In recent years, duct type steam flow cut-tobacco drier presents the conventional rollers cut-tobacco drier trend that substitutes gradually.This is mainly fast based on steam flow baking silk pipe tobacco flow velocity, has solved loss problem end to end in the baking silk process basically, and its effect aspect impurity elimination gas is more obvious and thorough simultaneously, but it but makes the fragrance heavy losses of tobacco problem own in baking silk process; Traditional cylinder cut tobacco dryer is keeping aspect the fragrance of tobacco own greater advantage being arranged, and in baking silk process, more help the browning reaction of tobacco simultaneously, thereby the cigarette that produces more more horn of plenties is fragrant.At present, around how solving cylinder cut tobacco dryer loss problem end to end, domestic many producers are concentrating on studies always, though results to some extent, still not really desirable, best effects is: every batch of pipe tobacco is produced about loss control to 15 end to end kilogram.The throwing process has the grouping Processing mode of production that adopts fuel passage baking silk pattern and thin plate baking silk pattern to combine at present; The thin plate cut-tobacco drier is the SH628 of the elder brother shipping company type thin board type cut-tobacco drier that comes into operation after the technological transformation in December, 2008; Although should baking leaf silk machine automatic control degree higher, in design, increased pipe tobacco treatment technology end to end, moisture in cut tobacco, temperature fluctuation range are less; But in production practices, there is the big problem of dried end to end pipe tobacco amount always.According to statistics, be SS with every batch of 4000Kg of inventory, when each batch trade mark is produced end to end pipe tobacco moisture content all reach more than 50 kilograms less than 10% waste material, cause tobacco leaf consumption big, the one-tenth silk rate in throwing workshop is produced very big influence.

The utility model content

The utility model technical problem to be solved is to above-mentioned present situation, provides a kind of and can reduce the pipe tobacco thin plate cut-tobacco drier of loss end to end.

The utility model solves the problems of the technologies described above the technical scheme of taking:

A kind ofly can reduce the pipe tobacco thin plate cut-tobacco drier of loss end to end; Comprise baking silk tube and the hot-blast pipe line that is communicated with said baking silk tube; Hot blast import department at said hot-blast pipe line is provided with steam atomization water humidifying device; Said steam atomization water humidifying device comprises high pressure water route, high temperature saturated vapor pipeline and the shower nozzle that is connected simultaneously with said high pressure water route, high temperature saturated vapor pipeline, and said shower nozzle is arranged in the hot-blast pipe line.

The number of said shower nozzle is more than one.

The beneficial effect that the utility model adopts technique scheme to obtain is: the utility model improves existing thin plate cut-tobacco drier; In the hot blast import department of hot-blast pipe line steam atomization water humidifying device is installed, after the improvement, from central control room sampling tobacco-dryer exit moisture content process control chart and the preceding contrast of transformation; The amount of waste material time shortens end to end to improve back baking silk; The variation tendency transition is steady, and the finished cut tobacco quality has been carried out tracking verification and data statistics, sees table 1 and table 2:

Table 1 in August, 2011 1-7 day product structured data table

The trade mark	Lot number	Degree of purity	Filament broken rate	The filling value	Whole cut rate
						A	4	99.875	2.05	4.33	82.4
B	13	99.814	2.11	4.40	82.71
						C	10	99.838	1.52	4.32	82.982
D	5	99.862	2.16	4.64	80.32
						E	3	99.867	1.81	4.38	82.61
F	2	99.9	2	4	79.5
						G	7	99.886	1.9	4.286	82.23
H	5	99.9	1.52	4.26	82.2
						I	2	99.9	1.4	3.9	82.6

Table 2 in August, 2011 1-3 day product quality tables of data

Order of classes or grades at school	The trade mark	Batch	Project	10 averages
					Third	A	3	Moisture	12.324
Third	A	4	Moisture	12.17
					Third	A	5	Moisture	12.206
First	B		3	Moisture						12.576
					First	C		3	Moisture		12.705
First	C	4	Moisture	12.775
					Second	D	2	Moisture	12.965
Second	C	5	Moisture	12.934
					Third	D		3	Moisture	12.799
Third	D	4	Moisture	12.878
					Third	C	7	Moisture	12.724
First	E	2	Moisture	12.693
					First	F	2	Moisture	12.655
First	B	4	Moisture	12.469
					First	B	5	Moisture	12.45
Second	C	6	Moisture	12.701
					Third	G	1	Moisture	12.411
Third	C	10	Moisture	12.764
					Third	G	2	Moisture	12.422
Third	D	5	Moisture	12.957

Can find out that from last table data product structure is stable after improving, moisture content is qualified, product quality is significantly improved.According to technology measuring and calculating, kilogram reduces to improved below 3 kilograms surplus waste every batch 50 before transform end to end, and this achievement in research can be carried out the tobacco processing industry and promoted.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the structural representation of the utility model steam atomization water humidifying device.

In the accompanying drawings: 1 baking silk tube, 2 hot-blast pipe lines, 3 steam atomization water humidifying devices, 4 high pressure water routes, 5 high temperature saturated vapor pipelines, 6 shower nozzles.

The specific embodiment

As shown in Figure 1; Present embodiment comprises baking silk tube 1 and the hot-blast pipe line 2 that is communicated with said baking silk tube 1; Hot blast import department at said hot-blast pipe line 2 is provided with steam atomization water humidifying device 3; As shown in Figure 2, said steam atomization water humidifying device 3 comprises high pressure water route 4, high temperature saturated vapor pipeline 5 and the shower nozzle 6 that is connected simultaneously with said high pressure water route 4, high temperature saturated vapor pipeline 5, and said shower nozzle 6 is arranged in the hot-blast pipe line 2.

More even for the water smoke that steam atomization water humidifying device 3 is sprayed in the hot-blast pipe line 2, the number of shower nozzle described in the present embodiment 6 is two.

In process of production; When the cut-tobacco drier preheating puts in place when beginning to produce, material is delivered to uclear scale from the warehouse style heap elevating belt of feeder of seeking, and shows the material beginning from uclear scale; Material will be allowed for access behind uclear scale, HT tunnel damping machine and the groove that shakes and be dried by the fire the silk tube; Time spent was approximately for 25 seconds during this, and the mass flow of beginning is also well below the setting flow, and the technology dehumidification ability of cut-tobacco drier after accomplishing preheating matees with normal flow of tobacco in design; Because flow of tobacco is less during beginning, so will inevitably produce pipe tobacco (promptly doing head) less than standard moisture content.The actual duration is about five minutes.In material tail and batch turning stage, the flow of pipe tobacco is a process of successively decreasing, and it is inhomogeneous that this process certainly will cause pipe tobacco to be heated again, just caused dried tail pipe tobacco.

Through the analysis and investigation at scene, find that in the stub bar stage because outlet does not have pipe tobacco moisture content feedback, baking silk tube PID does not participate in control, the control under preset definite value of whole stub bar stage is produced; In the material tail stage; Baking silk tube Steam Heating valve opening is 0%; The tube temperature drop is low, and the moisture loss rate of material tail pipe tobacco reduces, but still has a large amount of dried tail pipe tobaccos. find simultaneously; Beginning production and completed product run time period, the humidification of the control end to end steam valve of equipment design itself is all opened a setting-up time simultaneously.

Confirm through above analysis; Flow of tobacco is little when producing end to end; The humidity value of pipe tobacco itself is to cause the dried partially basic reason of pipe tobacco end to end less than the dehumidification ability that satisfies cut-tobacco drier under the explained hereafter condition; Though SH628 type thin board type cut-tobacco drier has designed humidifying device end to end, mend wet ability and be nowhere near.

According to thin plate cut-tobacco drier technological parameter and pipe tobacco physical characteristic relation, the actual dehumidification ability when needing only lost ability of pipe tobacco moisture content and cut-tobacco drier punishment in advance is complementary, and can effectively solve the dried partially problem of pipe tobacco end to end.In order to improve the automatization level of Equipment Control, do reference with humidity discharging mouth waste gas humidity value, through increasing environment humidifying device in the dress baking silk tube; In conjunction with air-heater frequency and humidity discharging throttle opening value; Make pid control circuit, improve ambient humidity value in the driving front roll, make it to adapt with the supplied materials flow; Thereby do not changing under original process conditions prerequisite, reducing the stub bar amount of waste material.

(vertical tube wall is installed, can avoid atomizing produce water droplet when bad get into hot-blast pipe line) design and installation steam atomization water humidifying device at cut-tobacco drier hot-blast pipe line inlet tube wall place, atomized water nozzle vertically upward, Fig. 1 is seen in the installation site.High pressure water route and water yield size are controlled by the SAMSON membrane valve automatically, adopt analog quantity to realize the accurate control of atomized water precision; For reducing the influence of atomized water to hot blast temperature, adopt the high temperature saturated vapor to atomize, steam is controlled by high temperature resistant angle valve, and membrane valve and angle valve are realized control automatically.Thereby realize strengthening drying cylinder hot blast humidity, and then reach the purpose that increases air humidity in the drying cylinder.

Because increasing the purpose of dress hot-air system steam atomization water humidifying device is to improve ambient humidity value in the drying cylinder; Reduce dehumidification ability in the drying cylinder, make it with tube in the moisture in cut tobacco ability of scattering and disappearing be complementary the process conditions when not changing ordinary production; This device can only use under improper production status; So hot-air system steam atomization water moistening function can only be launched in equipment preheating and stub bar material tail time period, i.e. preheating, stub bar and material tail are produced three phases.

According to of the influence of tube-sheet type cut-tobacco drier technological parameter to moisture in cut tobacco; The subject study focus is the interior ambient humidity value of stage thin plate baking end to end; The control parameter is launched around the interior ambient humidity value of cylinder, and relating to direct factor is bowl temperature, hot blast temperature, air-heater frequency converter frequency, humidity discharging throttle opening, hot-air system humidification atomized water by-pass valve control aperture, stub bar atomized water opening time and material tail atomized water opening time.

As everyone knows, all suitable pid control parameters all are to draw through loaded down with trivial details practice and realistic summary.For the effect that obtains getting twice the result with half the effort, we observe through multiple batches of production and find, end to end moisture in cut tobacco from do partially arrive that normal process requires about 13% or when since about 13%, diminishing, the interior ambient humidity critical value of drying cylinder is 32%; Simultaneously with reference to the original material tail of equipment control principle; When tube temperature control opening value is made as zero; Because environment temperature, humidity effect; The tube temperature is minimum to can be controlled in 100 ℃; So the parameter pattern of groping is set at cylinder humidity set point 32%, relation, steam atomization water opening time and HT when the warm steam valve opening value of tube temperature 100 ℃, tins is made as zero between hot-air system steam atomization water membrane valve opening value, air-heater frequency converter frequency setting value and the humidity discharging throttle opening value three add the water opening time end to end.

According to the relation between thin plate cut-tobacco drier control principle and three parameters, with reference to the preset definite value X of the original control program of equipment, three parameter values of sampling are respectively formed one group and are intersected experiment.On behalf of example, the ambient humidity value reaches 32% time of critical value to pipe tobacco in the contrast drying cylinder with red stone two, realistic three batches of every group of data, and the 18 groups of data of sampling compare test parameter value such as table 3.

Table 3 control selection of parameter table

After control program is revised, learn through realistic, when the spray aperture is made as 65%, the blower fan frequency is made as 15Hz, when the humidity discharging aperture is made as 75%, under the good appointed condition of original preheating, in the cylinder ambient humidity increase the fastest, the time is about 15 minutes.Because cylinder normal preheating time is 15-25 minute; In order to reduce steam atomization water to the influence of hot blast temperature and the frequency of minimizing atomized water generation water droplet; We get compromise value 20Hz with the blower fan frequency; The spray aperture value of keeping 45% of going bail in 20-25 divides clock time, can realize that humidity value is increased to about 25% from original 4%.

Through repeatedly actual measuring and calculating; Pipe tobacco needs the time of about 4M20S, in order to bring into play hot-air system steam atomization water humidification to greatest extent from getting into cylinder to coming out; We wet head do not occur in line with the stub bar pipe tobacco and are principle; With reference to original stub bar control program PID starting time 3M, we are set at 150S with the hot blast steam atomization water opening time, and the staged tube temperature control membrane valve aperture setting value before simultaneously original stub bar production PID being worked increases progressively amplitude and incremental spacing improves.Through actual test, the stub bar production waste approximately reduces to about 8KG, and a wet phenomenon do not occur.

Stub bar is begun the control that back HT adds the pneumatics atomized water time; We still wet head do not occur for principle in line with the stub bar pipe tobacco, and with reference to existing equipment steam humidifying time 50S, pipe tobacco has from uclear scale expects that getting into the cylinder time is 25S; Pipe tobacco flow on uclear scale show from the time that has material to begin to reach normal process flow 6000kg/h be 40S; We choose 50S, 60S and 70S time, carry out three groups of data tests respectively in conjunction with aforementioned steam atomization water humidification function, like table 4:

Table 4 stub bar adds water time test table

M	1	2	3	4	5	6	7	8	9
										T（S）	50	50	50	60	60	60	70	70	70
Z(kg)	3.3	3.8	3.1	2.8	2.1	2.7	2.4	2.5	2.2

In order to guarantee to change the least possible influenced of normal process parameter the material tail process over to from ordinary production; Hot blast steam atomization water humidifying device does not participate in expecting tail control; The material tail is controlled at and keeps only increasing HT pneumatics atomized water humidification mode on the original equipment control technology basis.Adding the water time adds water time design with reference to the HT stub bar, when seek before the uclear scale heap elevating belt of feeder charging photoelectric tube continuous detecting do not have charging 30S after delayed start-up,

Opening time is provided with 70S, 50S and 40S each minute and tests realistic, as shown in table 5 three times.

Table 5 material tail adds water time test table

M	1	2	3	4	5	6	7	8	9
										T（S）	70	70	70	50	50	50	40	40	40
Z(kg)	0.5	0.4	0.5	0．5	0.5	0.5	1.1	1	0.8

Realistic based on test, in conjunction with original technological parameter is changed minimum principle, each item control parameter is carried out the refinement correction while implementing, parameters is set at table 6 data the most at last, simultaneously control program has been carried out synchronous improvement.

Table 6 parameter is set table

M

SD

TSS

TS

WKD

WS

HTTS

HTWS

PL

FK

CV

60％

100°C

190S

45%

110S

50S

70S

20Hz

75%

Improve the amount of waste material time shortening end to end of back baking silk, the variation tendency transition is steady, and product structure is stable, moisture content is qualified, and product quality is significantly improved.According to technology measuring and calculating, kilogram reduces to improved below 3 kilograms surplus waste every batch 50 before transform end to end.This achievement in research can be carried out the tobacco processing industry and promoted.

Claims (2)

1. one kind can be reduced the pipe tobacco thin plate cut-tobacco drier of loss end to end; Comprise baking silk tube (1) and the hot-blast pipe line (2) that is communicated with said baking silk tube (1); It is characterized in that being provided with steam atomization water humidifying device (3) in the hot blast import department of said hot-blast pipe line (2); Said steam atomization water humidifying device (3) comprises high pressure water route (4), high temperature saturated vapor pipeline (5) and the shower nozzle (6) that is connected simultaneously with said high pressure water route (4), high temperature saturated vapor pipeline (5), and said shower nozzle (6) is arranged in the hot-blast pipe line (2).

2. a kind ofly can reduce the pipe tobacco thin plate cut-tobacco drier of loss end to end according to claim is described, the number that it is characterized in that said shower nozzle (6) is more than one.

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