CN205455999U - Device of monitoring tobacco cut -tobacco drier sheet metal heat transfer ability and hydrophobic state - Google Patents

Abstract

The utility model provides an install the manometer before the trap that device of monitoring tobacco cut -tobacco drier sheet metal heat transfer ability and hydrophobic state, characterized in that installs the weighing device under the condensation water pitcher that lies in tobacco cut -tobacco drier condensate outlet department, install level sensor on the condensation water pitcher, installs electronics measurement appearance on the water pump of connecting the condensation water pitcher, is connecting the condensation water pitcher. The beneficial effects are that: the utility model discloses discharge metering device through designing and install comdenstion water weighing device and water pump on current tobacco cut -tobacco drier, and the setting pressure is shown before the trap, combine PLC program calculation, realize the real -time on -line monitoring of tobacco cut -tobacco drier sheet metal heat transfer ability and hydrophobic state, can carry out timely maintenance management to tobacco cut -tobacco drier sheet metal and comdenstion water emission pipeline according to monitoring results, with heat transfer ability and the hydrophobic efficiency of optimizing tobacco sheet metal cut -tobacco drier, finally guarantee pipe tobacco water separation capability and homogeneity course of working. The device that designs simple and easy, the installation realizes in the engineering is actual easily.

Description

A kind of monitor Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat and the device of hydrophobic state

Art

This utility model relates to thin plate heat exchange property and the hydrophobic pipeline of cigarette process and drum drying equipment, especially drying equipment System.

Background technology

Nicotiana tabacum L. thin-plate cut-tobacco drier, as drying equipment crucial on scrap prodn. line, has material impact to the processing quality of finished cut tobacco. The exchange capability of heat of Nicotiana tabacum L. thin-plate cut-tobacco drier refers to the heat output in unit collection period, owing to steam discharges heat conversion in thin plate Become condensed water, therefore, it can the condensing rate according to condensed water and characterize the exchange capability of heat of Nicotiana tabacum L. cut-tobacco drier.

At present, Nicotiana tabacum L. thin-plate cut-tobacco drier use steam as thermal source, entering in the way of convection current is conducted with the tobacco shred that stir-fried in thin plate Row heat exchange, discharges heat and makes tobacco shred dehydration reach technological requirement index in heat exchanging process.In actual production process, supply The steam of thin plate from cigarette factory vaporium out, due to conveyance conduit condensation, is incubated the ever-present problems such as improper, steam leakage, When arriving use gas point thin-plate cut-tobacco drier, major part supply steam has not reached dry saturated steam quality or has been mixed with other gas Body, when entering aqueous in thin plate steam or remaining on-condensible gas, under equal pressure condition, enters thin plate steam and is difficult to meet baking In silk machine, the required heat load of tobacco shred dehydration, bigger to cut-tobacco drier overall heat exchange capacity.Additionally, Nicotiana tabacum L. cut-tobacco drier is when long Between use after, heat exchange flight inwall, due to the impurity being mixed with in steam and steam, in inner panel wall fouling, causes corruption in various degree Erosion；Flight outer wall and tobacco shred contact surface, due to factors such as ree-oil, tobacco shred moisture condensation, wooden partition oxidations, increase thin plate heat exchange heat Resistance so that the exchange capability of heat of thin plate reduces.Condensed water discharges through drain valve, owing to there is bigger pressure reduction before and after drain valve, Condensed water is made to form indirect steam after drain valve, accordingly, it is difficult to detect condensate flow with effusion meter.Cause thin plate heat exchange The factor of ability can not get being effectively improved, and changes technological parameter for reaching tobacco shred moisture content of outlet technological requirement, not only it cannot be guaranteed that The homogeneity processing of tobacco shred, causes the waste of steam energy simultaneously, reduces the service life of thin plate.

After the steam heat-exchanging condensation of supply thin plate, need to get rid of condensed water in time and effectively, it is ensured that whole heat transfer process is the most efficient Carrying out.Condensed water elimination pipeline is connected by swivel joint with admission line, it is desirable to fully seal separation, dries existing Nicotiana tabacum L. In the practice of silk machine, due to Rig up error or material processing technique level, often occur that some vapor is let out at swivel joint Leaking into the situation in condensing water conduit, and tobacco shred dehydration hydrophobic to pipeline affects greatly, but is but difficult to carry out in production On-line checking in journey, can only rely on field engineer's micro-judgment.Additionally, the blocking of condensed water draining system, drain valve fault etc. Ability hydrophobic to draining system will adversely affect, reduce the control effect of Nicotiana tabacum L. cut-tobacco drier.

Based on above Nicotiana tabacum L. cut-tobacco drier problem present in the actual production process, a kind of monitoring condensed water of the present utility model The device of condensing rate, and Pressure gauge is installed before drain valve, effectively monitor the exchange capability of heat of cut-tobacco drier and hydrophobic ability.

Summary of the invention

A kind of monitoring Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat and the device of hydrophobic state, this utility model is characterised by, is being positioned at cigarette Under condensate water pot at grass cut-tobacco drier condensation-water drain, weighing device is installed, condensate water pot is provided with liquid level sensor, Connect, on the water pump of condensate water pot, electronic measurement instrument is installed, before the drain valve connecting condensate water pot, Pressure gauge is installed.

This utility model is by being collected and Weighing the condensed water of Nicotiana tabacum L. cut-tobacco drier, and computation of Period condensed water condenses weight With pumping drainage weight.Before and after utilizing drain valve, pressure reduction calculates indirect steam generation amount, according to condensation water quantity and indirect steam gauge Calculate condensing rate.Meanwhile, according to pressure difference value before admission pressure and drain valve, it is judged that Nicotiana tabacum L. cut-tobacco drier hydrophobic state, including dredging Water is normal, blocked drain, and swivel joint steam is collaborated three kinds of states, with this real time on-line monitoring Nicotiana tabacum L. cut-tobacco drier thin plate heat-energy transducer Power and hydrophobic state.

Of the present utility model it is technically characterized by comprising the steps as follows:

(1) being provided with condensate water pot at existing Nicotiana tabacum L. cut-tobacco drier condensation-water drain, condensate water pot communicates with air, and this practicality is new Weighing device installed under condensate water pot by type, and water pot is provided with liquid level sensor, when condensed water arrives certain liquid level, water pump electricity Machine starts draining, and water pump is provided with electronic measurement instrument, and record water pump condensed water elimination action also converses condensed water elimination weight, When cut-tobacco drier drum inlet starts to feed, start condensed water metering, enter tank amount including gathering moment point condensed water and go out tank amount.

(2) the indirect steam treating method and apparatus that condensed water drain valve produces

Pressure gauge is installed before drain valve, detects hydrophobic upstream pressure P₁, owing to condensate water pot communicates with air, so condensed water After drain valve, indirect steam pressure is 0bar g, and corresponding condensed water specific enthalpy is 419kJ/kg, and under atmospheric pressure, evaporation of water enthalpy is 2257kJ/kg, by steam table inquiry corresponding to detection pressure P₁Time condensed water ratio enthalpy E, thus calculate through drain valve The indirect steam amount of backward airborne release.

Total condensation number=indirect steam amount+condensed water weighs

(3) monitoring of Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat and determination methods

After calculating condensing rate in a program, if less than normal heat exchange condensing rate thresholding lower bound, thin plate exchange capability of heat being described Not enough, it should Nicotiana tabacum L. cut-tobacco drier thin plate is carried out maintaining.If under the conditions of equal technological parameter, condensing rate is higher than normal Heat exchange condensing rate thresholding height limits, and illustrates that thin plate supply steam moisture is relatively big, and reply thin plate supply steam checks and processes.

(4) Nicotiana tabacum L. cut-tobacco drier condensed water hydrophobic state determination methods and device

Pressure gauge, when normal hydrophobic state, admission pressure and hydrophobic upstream pressure pressure differential range are installed before condensed water drain valve For Δ P=P_Mark±P_e, wherein, P_MarkFor optimal hydrophobic pressure difference, P_eFor allowable fluctuation range value.In process of production, If hydrophobic upstream pressure and admission pressure difference are less than Δ P_Mark-P_e, illustrate that at swivel joint, steam leaks into condensing water conduit, Cause condensing water conduit to be compared to admission line pressure drop too small or there is no pressure drop, can determine whether to collaborate for swivel joint.If it is hydrophobic Upstream pressure and admission pressure difference are more than Δ P_Mark+P_e, illustrate that water accumulation of pipeline causes drain valve to be in normally open, can determine whether as dredging Waterpipe blocked drain, should safeguard as early as possible.

This utility model beneficial effect: this utility model passes through design on existing Nicotiana tabacum L. cut-tobacco drier and installs condensed water weighing device With water pump emission measurement device, and before drain valve install Pressure gauge, in conjunction with PLC program calculate, it is achieved Nicotiana tabacum L. cut-tobacco drier thin plate Exchange capability of heat and the real time on-line monitoring of hydrophobic state, can be to Nicotiana tabacum L. cut-tobacco drier thin plate and condensed water elimination pipeline according to monitoring result Carry out maintenance management timely, with exchange capability of heat and the hydrophobic efficiency of optimizing tobacco thin-plate cut-tobacco drier, final guarantee tobacco shred dehydration energy Power and the homogeneity course of processing.Designed device is simple, easily installs in engineering reality and realizes.

Accompanying drawing explanation

Fig. 1 is a kind of to monitor Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat and the structure drawing of device of hydrophobic state；

In figure, each token name is referred to as: 1 tobacco shred entrance, 2 tobacco shreds outlets, 3 cut-tobacco drier cylinders, 4 jet chimneys and entering Gas direction, 5 steam-water separators, 6 filters, 7 enter thin plate steam gage, and 8 enter thin plate vapor (steam) temperature table, and 9 enter Thin plate steam membrane valve, 10 electronic measurement instrument, 11 condensate water pots, 12 liquid level sensors, 13 weighing instruments, 14 condensed water drain valves, 15 Pressure gauge, 16 swivel joints, 17 filters, 18 condensed water elimination pipeline and directions, 19-water pump.

Detailed description of the invention

For more preferably narration above-mentioned purpose of the present utility model, feature, describe concrete reality of the present utility model below in conjunction with the accompanying drawings in detail Execute mode.

Seeing Fig. 1, a kind of monitor Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat and the device of hydrophobic state, this utility model is characterised by, 11 times weighing device 13 is installed at the condensate water pot being positioned at Nicotiana tabacum L. cut-tobacco drier condensation-water drain, condensate water pot 11 is installed There is liquid level sensor 12, the water pump 19 connecting condensate water pot 11 is provided with electronic measurement instrument 10, connecting condensate water pot Before the drain valve 14 of 11, Pressure gauge 15 is installed.Other attachment structure of Fig. 1 is prior art.

Specific embodiment:

(1) condensed water weighing instrument and water pump discharge condensed water weight are gathered

Collection period T is set in PLC, is gathering moment collection condensed water weighing instrument 13 cumulative weight value W₁, water pump discharges Gauge 10 condensed water adds up discharge capacity W₂, then gathering moment condensed water weight is:

W=W₁-W₂。

(2) indirect steam quality and condensed water speed are calculated

Pressure gauge 15 pressure value P before gathering moment collection drain valve₁, owing to condensate water pot communicates with air, so condensed water After drain valve, indirect steam pressure is 0bar g, and corresponding condensed water is 419kJ/kg than enthalpy, and under atmospheric pressure, evaporation of water enthalpy is 2257kJ/kg, is inquired about corresponding to pressure P by steam table₁Time condensed water than enthalpy E, thus calculate through drain valve backward greatly The indirect steam amount of gas discharge.

Total condensation number W_Always=indirect steam amount+condensed water weighs

That is:

Condensing rate

(2) Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat is monitored according to condensing rate ω

At the beginning of Nicotiana tabacum L. cut-tobacco drier comes into operation, condensing rate when collection hydrophobic state is good, statistical analysis obtains more excellent heat exchange speed Rate scope territory ω_Mark.In different batches tobacco shred production process, gather condensing rate ω, ω is carried out statistical appraisal, if ω is < ω_Mark Lower limit, illustrates that thin plate exchange capability of heat is low, and reply Nicotiana tabacum L. cut-tobacco drier thin plate is cleared up and safeguards.If joined in equal technique Under said conditions, different batches tobacco shred, if ω > ω_MarkThe upper limit, illustrates that thin plate supply steam moisture increases, and reply supply steam enters Row inspection processes.

(3) Nicotiana tabacum L. cut-tobacco drier condensing water conduit hydrophobic state monitoring

Gather into thin plate steam gage 7 pressure value P in the collection moment₂, Pressure gauge 15 pressure value P before drain valve₁.Normally During hydrophobic state, enter thin plate steam pressure and hydrophobic upstream pressure pressure differential range territory is Δ P=P_Mark±P_e, wherein, P_MarkFor Good hydrophobic pressure difference, P_eFor allowable fluctuation range value.

IF P₂-P₁＜ min (Δ P) THEN swivel joint is collaborated

IF P₂-P₁＞ max (Δ P) THEN blocked drain

IF P₂-P₁∈ Δ P THEN is hydrophobic normally

Wherein, min (Δ P), Δ P lower limit, min (Δ P), the Δ P upper limit.

Designer trends figure on HMI picture, display cut-tobacco drier exchange capability of heat monitoring trend, and monitoring condensed water hydrophobic state in real time, Collaborate including swivel joint, blocked drain, hydrophobic normal three kinds of states.

The foregoing is only detailed description of the invention of the present utility model, it is impossible to limit scope of the present utility model with this, i.e. according to this reality The equivalent variations made with new patent application protection domain and modification, should be included in technology covering scope of the present utility model.

Claims (1)

1. monitor Nicotiana tabacum L. cut-tobacco drier thin plate exchange capability of heat and the device of hydrophobic state for one kind, it is characterised in that dry being positioned at Nicotiana tabacum L. Under condensate water pot (11) at silk machine condensation-water drain, weighing device (13) is installed, condensate water pot (11) is provided with liquid Level sensor (12), is provided with electronic measurement instrument (10) on the water pump (19) connecting condensate water pot (11), cold connecting The drain valve (14) of solidifying water pot (11) is front is provided with Pressure gauge (15).