CN1064096C - System for controlling temperature in steaming and boiling pot - Google Patents
System for controlling temperature in steaming and boiling pot Download PDFInfo
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- CN1064096C CN1064096C CN94105155A CN94105155A CN1064096C CN 1064096 C CN1064096 C CN 1064096C CN 94105155 A CN94105155 A CN 94105155A CN 94105155 A CN94105155 A CN 94105155A CN 1064096 C CN1064096 C CN 1064096C
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Abstract
The present invention relates to a system for controlling the temperature distribution of a steaming and boiling pot. The present invention comprises an optical fiber temperature measuring part, a reference temperature measuring part, a reference-point temperature setting part, a measured temperature distribution calculating part, a target temperature distribution calculating part and a control part, wherein the optical fiber temperature measuring part is arranged on a steaming and boiling pot which contains a wood chip and is provided with a control valve used for controlling steam which heats the wood chip, and respectively measures multiple-point temperatures in an extension direction; the control part adjusts the control valve to make the difference of the measured temperature distribution obtained by the optical fiber temperature measuring part, the reference temperature measuring part, the reference-point temperature setting part and the measured temperature distribution calculating part and the target temperature distribution obtained by the target temperature distribution calculating part within a predetermined range.
Description
The present invention relates to control the system of the Temperature Distribution of the wood chip in the digester that is contained in as the continuous digester of continuous manufacturing paper pulp.
Made digester with continuous digester in the paper mill in the past always.This continuous digester can be made paper raw material-paper pulp continuously by the many wood chips that cut down.By in continuous digester, boiling wood chip, make them resolve into lignin and fiber quality with alkali lye.Then, clean this fiber quality and the paper pulp that obtains is paper raw material.Wood chip is supplied with in the pot by the top of continuous digester.And wood chip is in pot chock off state bottom and alkaline reaction, migration bottom, limit.Use the detergent remover of supplying with by pot bottom to clean fiber quality (paper pulp) again, it is drawn from pot bottom.
At this moment, paper pulp must not contain lignin, and is made of the fiber quality merely.Though high cooking wood chip at high temperature can decompose lignin, also loses a part of fiber quality and causes wastage of material.Therefore, must be with suitable high temperature and reasonable time boiling wood chip.And such boiling situation called the boiling state, with the H factor representation.
Therefore, measure the Temperature Distribution of the wood chip of accommodating in the pot in such continuous digester, and carry out temperature control and make the Temperature Distribution of the wood chip of accommodating in the pot appropriate, this is for realizing in the papermaking that high-quality, high efficiency, resource-saving are very important.
The objective of the invention is to provide a kind of can be in the Temperature Distribution that does not hinder wood chip in the digester to flow to measure down in the digester, the trip temperature of going forward side by side control makes the suitable system for controlling temperature in steaming and boiling pot of Temperature Distribution of the wood chip of accommodating in the pot.
Above-mentioned purpose is realized by such system for controlling temperature in steaming and boiling pot.Promptly this system has: (1) be configured on the digester of accommodating wood chip, detect the long chi shape temperature detection member of the temperature of multiple spot position on the prolonging direction respectively; (2) measure the measuring temperature distribution member of the Temperature Distribution of the wood chip of accommodating in the above-mentioned digester according to the output of above-mentioned long chi shape temperature detection member; (3) warming element that the wood chip of accommodating in the above-mentioned digester is heated; (4) control above-mentioned warming element according to the output of said temperature measure of spread member, the control member that makes the above-mentioned wood chip that is contained in the above-mentioned digester have the Temperature Distribution of regulation.
Also available following such system for controlling temperature in steaming and boiling pot is realized above-mentioned purpose.Promptly this system has: (1) be configured in accommodate wood chip and have control heat these wood chips with on the digester of the control valve of steam, detect the temperature of the multiple spot position that comprises the datum mark of being got on the above-mentioned digester on the prolonging direction and use the fiber optic temperature determination part of Raman scattering effect respectively; (2) be disposed on the said reference point of above-mentioned digester the fiducial temperature determination part that the temperature signal of this datum mark is measured as fiducial temperature signal (reference temperature signal); (3), set the datum mark temperature setting portion of the datum mark temperature of above-mentioned fiber optic temperature determination part by the fiducial temperature signal correction that records with above-mentioned fixed temperature measuring portion temperature signal by the said reference point of above-mentioned fiber optic temperature determination part output; (4), calculate the observed temperature distribution that the observed temperature of the wood chip of accommodating in the above-mentioned digester distributes and calculate portion according to each temperature signal of the above-mentioned multiple spot of the said reference point temperature signal of this datum mark temperature setting portion output and the output of above-mentioned fiber optic temperature determination part; (5) according to the thermograde restriction of target paper output and above-mentioned digester, calculate the target temperature profiles of the target temperature profiles of the wood chip of accommodating in the above-mentioned digester and calculate portion; (6) adjust above-mentioned control valve, make above-mentioned observed temperature distribute difference with target temperature profiles in predetermined value with interior control member.
Fig. 1 is the synoptic chart of continuous digester one example in expression paper mill of the present invention;
Fig. 2 be among Fig. 1 II-II to profile;
Fig. 3 is the block diagram of system for controlling temperature in steaming and boiling pot of the present invention;
Fig. 4 is the profile of fibre optic thermometer heart yearn;
Fig. 5 is the profile of fibre optic thermometer cable;
Fig. 6-Figure 11 represents the form of fibre optic thermometer on the digester respectively;
Figure 12 is the performance plot that concerns between expression digester and the wood chip depth direction Temperature Distribution;
Figure 13 gathers an expression wood chip depth direction Temperature Distribution and pot performance plot of inner periphery direction Temperature Distribution.
The most preferred embodiment of system for controlling temperature in steaming and boiling pot of the present invention below is described.Earlier digester of the present invention is described referring to Fig. 1 and Fig. 2.Being the paper mill is formed with wood chip inlet 101 with the top of continuous digester 100, by this wood chip inlet 101 in pot for wood chip.Wood chip is in jam-pack state limit in pot and move to the bottom on alkaline reaction, limit.And pot bottom is provided with the outlet 103 that is used to draw fiber quality (paper pulp).Outlet 103 connecting pipes 104.Control valve 105 is contained on the pipeline 104, is used for adjusting the amount of drawing of fiber quality (paper pulp).Depth direction at digester 100 upper edge wood chips 102 is provided with a plurality of (illustrating 3) liquid extraction unit 109,110,111.On the position that liquid extraction unit 109,110,111 is set of digester 100, configuration filter (strainer: screen pack) 106,107,108.Liquid is extracted out in digester 100 through these filters 106,107,108.Liquid extraction unit 109 is connected with an end of pipeline 112.The other end of pipeline 112 is introduced in the pot as central tube 130.Pipeline 112 is provided with thermometer 113, pump 114, uses the heat exchanger 115 of steam and the control valve 116 of adjustment vapor volume.Equally, liquid extraction unit 110 is connected with an end of pipeline 117.The other end of pipeline 117 is introduced in the pot as central tube 130.Pipeline 117 is provided with thermometer 118, pump 119, uses the heat exchanger 120 of steam and the control valve 121 of adjustment vapor volume.Equally, liquid extraction unit 111 is connected with an end of pipeline 122.The other end of pipeline 122 is introduced in the pot as central tube 130.Pipeline 122 is provided with thermometer 123, pump 124, uses the heat exchanger 125 of steam and the control valve 126 of adjustment vapor volume.
The depth direction of definition wood chip 102 among the present invention (being the flow direction of wood chip 102, the above-below direction of pot) is R for Zhou Fangxiang in L, the pot.Zhou Fangxiang R refers to along the direction in the whole week of pot inwall in the pot.The Temperature Distribution of controlling depth direction L of the present invention and/or the Temperature Distribution of interior Zhou Fangxiang R.By the above-mentioned control valve 116,121,126 of suitable adjustment, can adjust pot temperature of interior wood chip 102.Promptly can control the Temperature Distribution of depth direction L of wood chip 102 and/or the Temperature Distribution of interior Zhou Fangxiang R by the adjustment of control valve 116,121,126.The most important thing is to measure the temperature of the wood chip 102 of accommodating in temperature in the pot, the pot among the present invention.Therefore, in the most preferred embodiment of following detailed description, the Temperature Distribution of the depth direction L of usefulness fibre optic thermometer 10 mensuration wood chips 102 and/or the Temperature Distribution (referring to Figure 12, Figure 13) of interior Zhou Fangxiang R.
Also have, pot bottom is provided with detergent remover supply unit 140.In pot, supply with detergent remover by this detergent remover supply unit 140, clean fiber quality (paper pulp).Adjust the detergent remover of supplying with in the pot by control valve 141.
Referring to Fig. 3, in the digester 100 of most preferred embodiment of the present invention, supply with wood chip 102 from top, draw slurry 20 by the bottom.Most preferred embodiment of the present invention adopts the fibre optic thermometer 200 of using the Raman scattering effect.This fibre optic thermometer 200 is by detecting means 201 (core section is shown in detail in Fig. 4), and cable portion 202 (cross section is shown in detail in Fig. 5) and light/electric transducer 203 constitute.
As shown in Figure 4; detecting means 201 has the periphery that is covered in the heat cure silicon 202-2 on the optical fiber glass 201-1 in protection, with PFA (Perfluoro-alkoxyfluoroPlastic:resin: the S type structure that coats again of the 201-3 perfluoro alkoxy fluoroplastics resin).
As shown in Figure 5, the structure of cable portion 202 for be contained in heart yearn 201 flexible or inflexibility stainless steel tube 202A in.
This fibre optic thermometer 200 has been used the Raman scattering effect of optical fiber.In case allow the light pulse incident optical, then by the each point reflect stray light of optical fiber.This stray light is divided into low-frequency component and two kinds of compositions of radio-frequency component.A kind of composition is relevant with the rerum natura of optical fiber, and another kind of composition is relevant with the temperature of rerum natura and reflecting surface.Therefore, according to the temperature than energy measurement reflecting surface of the intensity of above-mentioned two kinds of frequency contents.Also have, can calculate the distribution of the range direction of optical fiber according to the time of return of reflection of light light.That is to say, can measure the temperature of elongate optical fiber direction each point.
Also have, fibre optic thermometer 200 is the line of 1-4mm external diameter.Use optical fibers coated with metal.This fibre optic thermometer 200 has the following advantages: hinder and flow even be inserted in the stroke of wood chip in the digester also not conference; In the time of on digester 100, though in the digester 100 along the temperature distributing disproportionation of Zhou Fangxiang in the pot, also can detect the Temperature Distribution of pot interior Zhou Fangxiang.
On the other hand, present embodiment fibre optic thermometer 200, with the thermometer that detects fixing point (1 point) temperature, for example temperature detecting resistance body, thermocouple are compared, and temperature detecting precision is low.Under the present embodiment situation, the temperature of using fibre optic thermometer 200 and temperature detecting resistance build thermometer 206 to detect as the Extract test point 205 of temperature reference point.Thereby, if the detection signal of the detection signal compensated optical fiber thermometer 200 of the test point 205 of usefulness temperature detecting resistance build thermometer 206 just can be realized the temperature correction of fibre optic thermometer 200.Utilize a plurality of temperature detecting resistance build thermometers 206 again and a plurality of test points 205 are set, can also improve the temperature correction precision of fibre optic thermometer 200.
Fig. 6-Figure 11 represents that respectively fibre optic thermometer 200 is contained in the configuration example on the digester 100.Many are provided with under the situation, measure the temperature distribution history of horizontal cross-section direction.Also identical in the time of on coil.In the time of on the digester outer wall, utilize the bearing calibration of having adopted the datum mark temperature detection sensor to compensate the error of conducting heat and causing.
Fig. 6 example be with detecting means 201 arranged perpendicular on the inwall of digester 100.Fig. 7 example be with many detecting means 201 arranged perpendicular on the inwall of digester 100.Fig. 8 example be with detecting means 201 spiralitys on the inwall of digester 100.But also can form than spiral shown in Figure 8 around the volume state density highland detecting means 201 of reeling more.Fig. 9 example be with detecting means 201 spirals on the outer wall that twists in digester 100.Figure 10 example is with the outside of detecting means 201 spirals around the central tube 130 that twists in digester 100.Figure 11 example is the outside of vertical or spiral winding is configured in digester 100 respectively with many detecting means 201 inwall, outer wall, central tube 130.
Return Fig. 3 again, the multi-point temp signal on the digester 100 can be obtained by the signal of telecommunication that the light/electric transducer 203 of fibre optic thermometer 200 is exported.At this moment, in the signal of telecommunication of the expression multi-point temp that records by fibre optic thermometer 200, comprise the signal of telecommunication of the temperature of the datum mark 205 of representing digester 100.The signal of telecommunication that is obtained by light/electric transducer 203 is represented the Temperature Distribution of depth direction L of the wood chip 102 in the digester 100 and/or the Temperature Distribution (referring to Figure 12, Figure 13) of interior Zhou Fangxiang R.
In addition, datum mark 205 places in digester 100 imbed fixed thermometer 206.The thermometric value at these datum mark 205 places is used for fibre optic thermometer 200 is carried out temperature correction.Therefore, datum mark 205 must be selected in the position that is suitable for proofreading and correct in the digester 100.Base Huaihe River point temperature corrector 207 is utilized the measured datum mark temperature value of fixed thermometer 206, proofreaies and correct the signal of telecommunication corresponding with datum mark by 203 outputs of light/electric transducer, the datum mark temperature of setting fibre optic thermometer 200.
Observed temperature distributed arithmetic device 204 is calculated the bulk temperature distribution (observed temperature distribution) of digester 100 according to the signal of telecommunication of light/electric transducer 203 outputs.It is the Temperature Distribution of the depth direction L of wood chip 102 in the digester 100 and/or the Temperature Distribution (referring to Figure 13) of interior Zhou Fangxiang R that this observed temperature distributes.This observed temperature of datum mark temperature correction of observed temperature distributed arithmetic device 204 usefulness datum mark temperature correction circuits 207 outputs distributes.
Observed temperature distribution pattern curve display 208 shows the graph curve (actual measurement graph curve) of the observed temperature distribution of being calculated by observed temperature distributed arithmetic device 204.Target data setting apparatus 209 is set paper output, the target H factor, thermograde restriction.Here, the restriction of so-called thermograde is meant the restriction of temperature rising gradients and apse rate in the digester 100, and is intrinsic in the digester 100, can keep the temperature limits value on the wood chip stroke directions of stablizing operation.
The target temperature profiles of wood chip 102 is calculated in the paper output that target temperature profiles graph curve arithmetic unit 210 is set according to target data setting apparatus 209, the target H factor, thermograde restriction.
Target temperature profiles graph curve display 211 shows the graph curve (targeted graphical curve) of the target temperature profiles of calculating with target temperature profiles arithmetic unit 210.
Carry out following work in the system of the present embodiment of said structure.That is, in the paper mill that has the continuous digester of making paper pulp by wood chip, adopt the fibre optic thermometer 200 of using the Raman scattering effect.After the Temperature Distribution with wood chip 102 in the fibre optic thermometer 200 METHOD FOR CONTINUOUS DETERMINATION digesters, detect the mean temperature distribution pattern curve of the depth direction (flow direction) of wood chip 102, so that the H factor (boiling state) of wood chip 102 is maintained on the setting.
At this moment, as Fig. 6-shown in Figure 10, fibre optic thermometer 200 or hang down many to digester inside from the upper vertical of digester 100; Or helical form is around the outer wall or the inwall of digester 100; Or helical form is around the central tube (inner cylinder portion) of digester 100.But also can merge the method for using Fig. 6-Figure 10 as shown in figure 11.
Then, reach the curve-actual measurement graph curve (referring to Figure 12) of the mean temperature of interior Zhou Fangxiang distance according to the depth direction distance of calculating wood chips 102 in the relative digester 100 behind the temperature detecting signal correction fibre optic thermometer 200 that is embedded in the fixed thermometer 206 in the datum mark 205.Ask the flow velocity of pot interior paper pulp again according to paper output, and the depth direction distance of calculating wood chip 102 in the relative pot reaches the mean temperature a reference value graph curve (targeted graphical curve) of interior Zhou Fangxiang distance, so that realize necessary boiling state, then adjust control valve 116,121,126, both are equated.
Should note following item in the present embodiment,,, must press to minimum the place is set so in digester, play the temperature detecting point of thrust effect promptly because the wood chip 102 in the digester 100 is to fill up under the state toward dirty.When the temperature detecting point in the increase digester 100, can cause the clogging of hanging of wood chip 102 at the temperature detecting point place.In the present embodiment, because of the detecting means 201 of fibre optic thermometer 200 is long chi shape, so can not cause the multi-point temp on its prolonging direction of mensuration under the clogging.
Also have, wood chip 102 enters into time of coming out from the bottom to be changed with the output of wood chip 102 from the top of digester, roughly spends 8-10 hour.Also have, in a single day Temperature Distribution figure curve departs from target setting, approximately will spend 8-10 hour ability to recover.Also since the position that can detected temperatures changes only in the position that is provided with of Temperature Detector, so digester 100 interior temperature distribution depart under the situation, detect this and depart to such an extent that spend several hours.To this, present embodiment is made comparisons and is adjusted control valve 116,121,126 by surveying graph curve and targeted graphical curve all the time or off and on, deviates from possible trouble so prevent Temperature Distribution.At this moment, the target temperature profiles graph curve of the wood chip (paper pulp) that flows in the digester 100 depends on that paper output, the target H factor and thermograde change restriction.Adjusting control valve 116,121,126 makes observed temperature distribution pattern curve consistent with this target temperature profiles graph curve.The adjustment of control valve 116,121,126 is equivalent to control the vapor volume of heat exchanger.Since this moment can be temperature controlled just in fact the position of assembling heat exchanger (position of fixed thermometer is set), realize the temperature adjustment inner all so will carry out the following compensation of enumerating to digester 100.Also can on demand multiple being used in combination be done in these compensation.
(1) controlling liquid extraction unit 109,110,111 temperature nearby, making the maximum temperature position in the digester 100 is assigned position.
(2) observed temperature distribution pattern curve and target temperature profiles graph curve not simultaneously, the temperature that will answer with the H factor pair is adjusted the back by control valve 116,121,126 and is given and wood chip as correction.
(3) above-mentioned compensation also is applicable to the interior Zhou Fangxiang Temperature Distribution of digester 100.
(4) method of the difference of observed temperature distribution pattern curve and target temperature profiles graph curve by way of compensation is to adjust control valve 116,121,126, enables to give and the weighting correction for the part different with the common stroke of wood chips in the digester 100.
Again the H factor in the Temperature Distribution control is set and elaborated.Figure 12, Figure 13 represent that respectively digester 100 temperature inside distribute (Temperature Distribution of wood chip 102) and the relation of digester 100.Figure 12 represents the Temperature Distribution of the depth direction L of wood chip 102, and Figure 13 represents that the Temperature Distribution of the depth direction L of wood chip 102 reaches the Temperature Distribution of interior Zhou Fangxiang R.
The H factor of the cooking degree of expression wood chip 102 is shown in the following function.
H=exp(B-A／T)dt
In the formula, T is a boiling temperature, and A, B are Broome (Broom) constant.
On the other hand, digestion time changes according to the translational speed of the wood chip 102 of digester 100 inside.
t=f(L)
In the formula, L is the function from the distance of digester 100 inlet beginnings.
H=K·exp(B-A／T)dL
Temperature (T) in the regulation H factor and the curve shown in Figure 12 right side and distance (L) are enclosed area partly and are directly proportional.
In sum, if utilize the present invention, then can provide a kind of and not hinder flowing of wood chip in the digester and measure the Temperature Distribution of the wood chip of accommodating in the pot, controlling temperature, to make the wood chip of accommodating in the pot be the digester temperature control system of suitable Temperature Distribution.
Claims (21)
1. system for controlling temperature in steaming and boiling pot is characterized in that having: (1) be configured on the digester of accommodating wood chip, detect the long chi shape temperature detection member of the temperature of multiple spot position on the prolonging direction respectively; (2) measure the measuring temperature distribution member of the Temperature Distribution of the wood chip of accommodating in the above-mentioned digester according to the output of above-mentioned long chi shape temperature detection member; (3) warming element that the wood chip of accommodating in the above-mentioned digester is heated; (4) control above-mentioned warming element according to the output of said temperature measure of spread member, the control member that makes the above-mentioned wood chip that is contained in the above-mentioned digester have the Temperature Distribution of regulation.
2. system for controlling temperature in steaming and boiling pot according to claim 1 is characterized in that falling under the above-mentioned long chi shape temperature detection member approximate vertical inside of above-mentioned digester.
3. system for controlling temperature in steaming and boiling pot according to claim 1 is characterized in that above-mentioned long chi shape temperature detection member helically is disposed at the inwall of above-mentioned digester.
4. system for controlling temperature in steaming and boiling pot according to claim 1 is characterized in that above-mentioned long chi shape temperature detection member helically is disposed at the outer wall of above-mentioned digester.
5. system for controlling temperature in steaming and boiling pot according to claim 1 is characterized in that above-mentioned long chi shape temperature detection member helically is disposed on the center tubes of above-mentioned digester.
6. system for controlling temperature in steaming and boiling pot according to claim 3 is characterized in that said temperature measure of spread member is disposed between the filter and inwall set on the above-mentioned digester.
7. system for controlling temperature in steaming and boiling pot according to claim 1, it is characterized in that said temperature measure of spread member detects the temperature of the multiple spot on the prolonging direction of the datum mark of being got that comprises above-mentioned digester respectively, and have and use the loose fibre optic thermometer of effect of Raman.
8. system for controlling temperature in steaming and boiling pot according to claim 1, it is characterized in that said temperature measure of spread member has the output according to above-mentioned long chi shape temperature detection member, measures the member of the depth direction Temperature Distribution of the wood chip of accommodating in the above-mentioned digester.
9. system for controlling temperature in steaming and boiling pot according to claim 1, it is characterized in that said temperature measure of spread member has the output according to above-mentioned long chi shape temperature detection member, measure the member of the depth direction Temperature Distribution and the interior Zhou Fangxiang Temperature Distribution of pot of the wood chip of accommodating in the above-mentioned digester.
10. system for controlling temperature in steaming and boiling pot according to claim 1 is characterized in that said temperature measure of spread member has: member is calculated in the observed temperature distribution that (1) calculates the observed temperature distribution of the wood chip of accommodating in the above-mentioned digester according to the output of above-mentioned long chi shape temperature detection member; (2) according to the thermograde restriction of target paper output and above-mentioned digester, calculate the target temperature profiles of the target temperature profiles of the wood chip of accommodating in the above-mentioned digester and calculate member.
11. system for controlling temperature in steaming and boiling pot according to claim 1 is characterized in that above-mentioned warming element has to make steam contact the member of the wood chip that above-mentioned digester accommodates.
12. a system for controlling temperature in steaming and boiling pot is characterized in that having: (1) be configured in accommodate wood chip and have control heat these wood chips with on the digester of the control valve of steam, detect the temperature of the multiple spot position that comprises the datum mark of being got on the above-mentioned digester on the prolonging direction and use the fiber optic temperature determination part of Raman scattering effect respectively; (2) be disposed on the said reference point of above-mentioned digester the fiducial temperature determination part that the temperature signal of this datum mark is measured as fiducial temperature signal (reference temperature signal); (3), set the datum mark temperature setting portion of the datum mark temperature of above-mentioned fiber optic temperature determination part by the fiducial temperature signal correction that records with above-mentioned fixed temperature measuring portion temperature signal by the said reference point of above-mentioned fiber optic temperature determination part output; (4), calculate the observed temperature distribution that the observed temperature of the wood chip of accommodating in the above-mentioned digester distributes and calculate portion according to each temperature signal of the above-mentioned multiple spot of the said reference point temperature signal of this datum mark temperature setting portion output and the output of above-mentioned fiber optic temperature determination part; (5) according to the thermograde restriction of target paper output and above-mentioned digester, calculate the target temperature profiles of the target temperature profiles of the wood chip of accommodating in the above-mentioned digester and calculate portion; (6) adjust above-mentioned control valve, make above-mentioned observed temperature distribute difference with target temperature profiles in predetermined value with interior control member.
13. system for controlling temperature in steaming and boiling pot according to claim 12 is characterized in that above-mentioned fiber optic temperature determination part generally perpendicularly falls in the inside of above-mentioned digester down.
14. system for controlling temperature in steaming and boiling pot according to claim 12 is characterized in that above-mentioned fiber optic temperature determination part helically is disposed at the inwall of above-mentioned digester.
15. system for controlling temperature in steaming and boiling pot according to claim 12 is characterized in that above-mentioned fiber optic temperature determination part helically is disposed at the outer wall of above-mentioned digester.
16. system for controlling temperature in steaming and boiling pot according to claim 12 is characterized in that above-mentioned fiber optic temperature determination part helically is disposed on the center tubes of above-mentioned digester.
17. system for controlling temperature in steaming and boiling pot according to claim 14 is characterized in that above-mentioned fiber optic temperature determination part is disposed between the filter and inwall set on the above-mentioned digester.
18. system for controlling temperature in steaming and boiling pot according to claim 12, it is characterized in that the above-mentioned observed temperature portion of calculating that distributes has each temperature signal of the above-mentioned multiple spot of exporting according to the said reference point temperature signal and the above-mentioned fiber optic temperature determination part of the output of said reference point temperature setting portion, calculates the observed temperature components distributed of the depth direction of the wood chip of accommodating in the above-mentioned digester.
19. system for controlling temperature in steaming and boiling pot according to claim 12, it is characterized in that the above-mentioned observed temperature portion of calculating that distributes has each temperature signal according to the above-mentioned multiple spot of the said reference point temperature signal of said reference point temperature setting portion output and the output of above-mentioned fiber optic temperature determination part, the observed temperature of calculating the depth direction of the wood chip of accommodating in the above-mentioned digester distributes and the observed temperature components distributed of pot interior Zhou Fangxiang.
20. system for controlling temperature in steaming and boiling pot according to claim 12, it is characterized in that the above-mentioned target temperature profiles portion of calculating has the thermograde restriction according to target paper output and above-mentioned digester, calculate the member of target temperature profiles of the depth direction of the wood chip of accommodating in the above-mentioned digester.
21. system for controlling temperature in steaming and boiling pot according to claim 12, it is characterized in that the above-mentioned target temperature profiles portion of calculating has the thermograde restriction according to target paper output and above-mentioned digester, calculate the member of the target temperature profiles of Zhou Fangxiang in the target temperature profiles of depth direction of the wood chip of accommodating in the above-mentioned digester and the pot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105155A CN1064096C (en) | 1994-04-28 | 1994-04-28 | System for controlling temperature in steaming and boiling pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105155A CN1064096C (en) | 1994-04-28 | 1994-04-28 | System for controlling temperature in steaming and boiling pot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110733A CN1110733A (en) | 1995-10-25 |
| CN1064096C true CN1064096C (en) | 2001-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94105155A Expired - Fee Related CN1064096C (en) | 1994-04-28 | 1994-04-28 | System for controlling temperature in steaming and boiling pot |
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| CN (1) | CN1064096C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110683A1 (en) * | 1982-11-24 | 1984-06-13 | The Babcock & Wilcox Company | Determining the degree of cooking in a sulphite digester delignification |
| SU1105530A1 (en) * | 1981-05-28 | 1984-07-30 | Ленинградское Отделение Научно-Исследовательского И Проектно-Конструкторского Института Целлюлозного Машиностроения | System for automatic control of pulp digesting temperature in intermittent-action digesters |
| SU1208117A2 (en) * | 1984-01-20 | 1986-01-30 | Ленинградское Отделение Научно-Исследовательского И Проектно-Конструкторского Института Целлюлозного Машиностроения | System for automatic control of pulp-digesting temperature in periodic-action digesters |
| CN85203760U (en) * | 1985-09-04 | 1986-05-07 | 云南工学院 | Sampler of pulp distillation temperature in evaporating globe |
| US4990219A (en) * | 1989-06-13 | 1991-02-05 | Elsag International B.V. | Apparatus for controlling the degree of cooking in a digester |
| JPH1045886A (en) * | 1996-08-06 | 1998-02-17 | Mitsui Petrochem Ind Ltd | Polyester, perform biaxially oriented bottle comprising the same and production of biaxially oriented polyester bottle |
-
1994
- 1994-04-28 CN CN94105155A patent/CN1064096C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1105530A1 (en) * | 1981-05-28 | 1984-07-30 | Ленинградское Отделение Научно-Исследовательского И Проектно-Конструкторского Института Целлюлозного Машиностроения | System for automatic control of pulp digesting temperature in intermittent-action digesters |
| EP0110683A1 (en) * | 1982-11-24 | 1984-06-13 | The Babcock & Wilcox Company | Determining the degree of cooking in a sulphite digester delignification |
| SU1208117A2 (en) * | 1984-01-20 | 1986-01-30 | Ленинградское Отделение Научно-Исследовательского И Проектно-Конструкторского Института Целлюлозного Машиностроения | System for automatic control of pulp-digesting temperature in periodic-action digesters |
| CN85203760U (en) * | 1985-09-04 | 1986-05-07 | 云南工学院 | Sampler of pulp distillation temperature in evaporating globe |
| US4990219A (en) * | 1989-06-13 | 1991-02-05 | Elsag International B.V. | Apparatus for controlling the degree of cooking in a digester |
| JPH1045886A (en) * | 1996-08-06 | 1998-02-17 | Mitsui Petrochem Ind Ltd | Polyester, perform biaxially oriented bottle comprising the same and production of biaxially oriented polyester bottle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1110733A (en) | 1995-10-25 |
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