CN203360927U - Liquid-vapor jet type negative pressure pumping device for paper making machine drying system - Google Patents

Liquid-vapor jet type negative pressure pumping device for paper making machine drying system Download PDF

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Publication number
CN203360927U
CN203360927U CN 201320423642 CN201320423642U CN203360927U CN 203360927 U CN203360927 U CN 203360927U CN 201320423642 CN201320423642 CN 201320423642 CN 201320423642 U CN201320423642 U CN 201320423642U CN 203360927 U CN203360927 U CN 203360927U
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China
Prior art keywords
water
liquid
negative pressure
jet
drying system
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Expired - Fee Related
Application number
CN 201320423642
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Chinese (zh)
Inventor
汤伟
李含君
王樨
王孟效
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Xianyang West micro Automation Technology Co., Ltd.
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Shaanxi University of Science and Technology
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Priority to CN 201320423642 priority Critical patent/CN203360927U/en
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Publication of CN203360927U publication Critical patent/CN203360927U/en
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Abstract

The utility model discloses a liquid-vapor jet type negative pressure pumping device for a paper making machine drying system. The liquid-vapor jet type negative pressure pumping device comprises a drying cylinder, wherein the drying cylinder is connected with a flash tank, an outlet of the flash tank is connected with a vapor inlet of a water jet, an outlet of the water jet is connected with a jet water tank, and the jet water tank is connected with a liquid inlet of the water jet through a water pump to form a circulating loop. Water filled into the jet water tank can be pumped into the water jet through the water pump to enable pressure intensity of the water jet to be lower than pressure intensity of pumped secondary vapor, the secondary vapor is injected into the water jet under the effect of the pressure intensity difference and then is mixed with the water, carried away by high-speed jet and discharged out of the water jet, and the purpose of pumping the pressure difference is achieved.

Description

A kind of vapour of the liquid for paper machine drying system injecting type is taken out negative pressure device
Technical field
The utility model relates to paper machine drying technology field, relates in particular to a kind of vapour of the liquid for paper machine drying system injecting type and takes out negative pressure device.
Background technology
The steam that paper machine dryer steam water interface is out undertaken after carbonated drink is separated discharging by flash tank is referred to as indirect steam, indirect steam is outwards aspirated by water ring vacuum pump traditionally, to guarantee the vacuum in flash tank, but because the indirect steam temperature is higher, easily cause the water ring vacuum pump temperature distortion and damage, to enterprise, bringing production suspension induced losses, simultaneously, the water ring vacuum pump consumed power is larger, and generally in the 15KW left and right, and price is comparatively expensive.In addition, usually for the control of water ring vacuum pump, only comprise and start and stop two states, it can only provide certain suction force and can not change according to actual conditions, and need to enter water quality wherein for purifying soft water, otherwise can cause damage to its parts.
The utility model content
For above-mentioned defect or deficiency, the utility model provides a kind of vapour of the liquid for paper machine drying system injecting type to take out negative pressure device, makes the efficiency of indirect steam suction be improved.
For reaching above purpose, the technical solution of the utility model is:
Comprise drying cylinder, drying cylinder is connected with flash tank, and the outlet of flash tank is connected with the gas access of water ejector, and the outlet of water ejector is connected with the injection water tank, sprays water tank and is connected with the liquid inlet of water ejector by water pump, forms closed circuit.
On described water pump, frequency converter is installed, between the entrance of drying cylinder and outlet, differential pressure transmitter is installed, the output of differential pressure transmitter is connected with frequency converter by adjuster.
Described water ejector comprises: be provided with the mixing chamber of gas access, an end of mixing chamber is equipped with the nozzle be connected with water pump, and the other end of mixing chamber is connected with diffuser, and diffuser is connected with the injection water tank.
The diameter of described nozzle is 20-30mm.
Described mixing chamber is column structure, and the diameter of mixing chamber is 220-240mm, and the diameter of mixing chamber outlet is 75-85mm.
The diameter of described diffuser is 60-70mm.
Between the outlet of described flash tank and the gas access of water ejector, the check-valves that prevents the indirect steam suck-back is installed.
Compared with prior art, the beneficial effects of the utility model are:
The utility model provides a kind of vapour of the liquid for paper machine drying system injecting type to take out negative pressure device, by replaced traditional water ring vacuum pump with water ejector, and the outlet at water ejector is connected with the injection water tank, spraying water tank is connected with the liquid inlet of water ejector by water pump, form closed circuit, the water of injecting jet water tank can be delivered in water ejector by water pump, cause water ejector pressure lower than the pressure that is evacuated gas, under the effect of this pressure difference, indirect steam is entered in water ejector by injection, with water, mix, and taken away by high-speed jet, and then be discharged from outside water ejector, reach the purpose of suction indirect steam, in addition, water ejector is not subject to hydraulic pressure strong, the pumped gas medium, the restriction of character etc., its vacuum is high, it take the water of certain pressure intensity is power, directly do not consume electric energy, therefore, the utility model has been saved the energy consumption that indirect steam is discharged, make the efficiency that the drying cylinder indirect steam is discharged improve.
The accompanying drawing explanation
Fig. 1 is that the utility model is taken out the negative pressure device structural representation for the liquid vapour injecting type of paper machine drying system;
Fig. 2 is that the utility model is taken out the water ejector structural representation of negative pressure device for the liquid vapour injecting type of paper machine drying system;
Fig. 3 is that the utility model is taken out negative pressure device control loop block diagram for paper machine drying system liquid vapour injecting type.
In figure, 1 is drying cylinder, and 2 is differential pressure transmitter, and 3 is pipeline, and 4 is adjuster, and 5 is check-valves, 6 is water ejector, and 7 is water, and 8 is water pump, and 9 for spraying water tank, and 10 is flash tank, 6-1 is nozzle, and 6-2 is mixing chamber outlet, and 6-3 is diffuser exit, and 6-4 is diffuser, the 6-5 mixing chamber.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
Shown in Figure 1, the utility model provides a kind of vapour of the liquid for paper machine drying system injecting type to take out negative pressure device, comprise drying cylinder 1, drying cylinder 1 is connected with flash tank 10, the outlet of flash tank 10 is connected with the gas access of water ejector 6 by pipeline 3, check-valves 5 for preventing the indirect steam suck-back is installed on pipeline 3, the outlet of water ejector 6 is connected with sprays water tank 9, spraying water tank 9 is connected with the liquid inlet of water ejector 6 by water pump 8, form closed circuit, wherein, on described water pump 8, frequency converter is installed, between the entrance of drying cylinder 1 and outlet, differential pressure transmitter 2 is installed, the output of differential pressure transmitter 2 is connected with frequency converter by adjuster 4, adjuster 4 is controlled the rotating speed of jet pump by the differential pressure that receives drying cylinder and jet pump 8, thereby change the aspiration of indirect steam by the flow of regulating clear water.
Concrete, shown in Figure 2, described water ejector 6 comprises: be provided with the mixing chamber 6-5 of gas access, mixing chamber 6-5 is column structure, and its diameter is 220-240mm, and the diameter of mixing chamber outlet 6-2 is 75-85mm; The end of mixing chamber 6-5 is equipped with the nozzle 6-1 be connected with water pump 8, the other end of mixing chamber 6-5 is connected with diffuser 6-4, the diameter of diffuser 6-4 is 60-70mm, between mixing chamber 6-5 and diffuser 6-4, by the transition inclined-plane, be connected, diffuser exit 6-3 is horn-like structure, and diffuser 6-4 is connected with injection water tank 9.
In the utility model, the steam that described drying cylinder 1 produces enters flash tank 10, produces indirect steam, indirect steam is inhaled into water ejector 6 by check-valves 5 after entering pipeline 3, spray in water tank 9 and be marked with water 7, water 7 enters and sprays water tank 9, is pumped to water ejector 6 for aspirating indirect steam.Described differential pressure transmitter 2 is for measuring the import and export differential pressure of drying cylinder 1, and described adjuster 4 is controlled the rotating speed of jet pump by the differential pressure that receives drying cylinder and jet pump 8, thereby changes the aspiration of indirect steam by the flow of regulating clear water.
Shown in Figure 3, for the utility model is taken out negative pressure device control loop block diagram for the liquid vapour injecting type of paper machine drying system, comprise drying cylinder, adjuster and differential pressure transmitter, pump variable frequency device, described pressure regulator is connected with the jet pump frequency converter, described transmitter is imported and exported differential pressure for measuring drying cylinder, and negative pressure signal is fed back to the comparator of pressure regulator input, then control the rotating speed of water pump by adjuster, thereby change the aspiration of indirect steam by the flow of regulating water.
The course of work of the present utility model and operation principle:
The steam that drying cylinder 1 produces enters the rear generation indirect steam of flash tank 10, indirect steam is inhaled into water ejector 6 by pipeline 3 and check-valves 5, the liquid inlet of water ejector 6 is by water pump 8, by the water 7 sprayed in water tank 9, in suction water ejector 6, cause water ejector 6 pressure lower than the pressure that is evacuated gas, under the effect of this pressure difference, indirect steam is entered in water ejector by injection, with water, mix, and taken away by high-speed jet, and then be discharged from outside water ejector, reach the purpose of suction indirect steam, wherein, water 7 is transformed into kinetic energy to potential energy by nozzle 6-1, the water flowed out from nozzle 6-1 forms high-speed jet, form parital vacuum in nozzle 6-1 exit, cause its pressure lower than the pressure that is evacuated gas, under the effect of this pressure difference, indirect steam is entered in water ejector by injection, with water 7, mix, and taken away by high-speed jet, again the kinetic energy of fluid-mixing is transformed into to potential energy and is discharged from outside water ejector through diffuser.Water ejector is not subject to working water pressure, the restriction of pumped gas medium, character etc., its vacuum is high, and it take the working water of certain pressure intensity is power, directly do not consume electric energy, adopt variable frequency control, power consumption is only the 5KW left and right, in addition, the utility model water ejector also has simple in structure, stable, the advantages such as operating maintenance convenience, this has just created advantage for the repeatedly utilization of enterprise's water resource.

Claims (7)

1. the vapour of the liquid for a paper machine drying system injecting type is taken out negative pressure device, it is characterized in that, comprise drying cylinder (1), drying cylinder (1) is connected with flash tank (10), the outlet of flash tank (10) is connected with the gas access of water ejector (6), the outlet of water ejector (6) is connected with sprays water tank (9), sprays water tank (9) and is connected with the liquid inlet of water ejector (6) by water pump (8), forms closed circuit.
2. the vapour of the liquid for paper machine drying system injecting type according to claim 1 is taken out negative pressure device, it is characterized in that, described water pump is equipped with frequency converter on (8), between the entrance of drying cylinder (1) and outlet, differential pressure transmitter (2) is installed, the output of differential pressure transmitter (2) is connected with frequency converter by adjuster (4).
3. the vapour of the liquid for paper machine drying system injecting type according to claim 1 is taken out negative pressure device, it is characterized in that, described water ejector (6) comprising: the mixing chamber (6-5) that is provided with gas access, one end of mixing chamber (6-5) is equipped with the nozzle (6-1) be connected with water pump (8), the other end of mixing chamber (6-5) is connected with diffuser (6-4), and diffuser (6-4) is connected with injection water tank (9).
4. the vapour of the liquid for paper machine drying system injecting type according to claim 3 is taken out negative pressure device, it is characterized in that, the diameter of described nozzle (6-1) is 20-30mm.
5. the vapour of the liquid for paper machine drying system injecting type according to claim 3 is taken out negative pressure device, it is characterized in that, described mixing chamber (6-5) is column structure, and the diameter of mixing chamber (6-5) is 220-240mm, and the diameter of mixing chamber (6-5) outlet (6-2) is 75-85mm.
6. the vapour of the liquid for paper machine drying system injecting type according to claim 3 is taken out negative pressure device, it is characterized in that, the diameter of described diffuser (6-4) is 60-70mm.
7. the vapour of the liquid for paper machine drying system injecting type according to claim 1 is taken out negative pressure device, it is characterized in that, the check-valves (5) that prevents the indirect steam suck-back is installed between the gas access of the outlet of described flash tank (10) and water ejector (6).
CN 201320423642 2013-07-16 2013-07-16 Liquid-vapor jet type negative pressure pumping device for paper making machine drying system Expired - Fee Related CN203360927U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320423642 CN203360927U (en) 2013-07-16 2013-07-16 Liquid-vapor jet type negative pressure pumping device for paper making machine drying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320423642 CN203360927U (en) 2013-07-16 2013-07-16 Liquid-vapor jet type negative pressure pumping device for paper making machine drying system

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CN203360927U true CN203360927U (en) 2013-12-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644090A (en) * 2013-11-28 2014-03-19 陕西科技大学 Liquid-gas jet type negative pressure pumping system and control method thereof
CN104264525A (en) * 2014-09-24 2015-01-07 陕西科技大学 Automatic early-warning and elimination system for water accumulation in drying cylinder of paper machine, and control method
CN108517711A (en) * 2018-04-03 2018-09-11 陕西科技大学 The control system and method for drying cylinder inlet and outlet differential pressure based on fuzzy immune PID algorithm

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644090A (en) * 2013-11-28 2014-03-19 陕西科技大学 Liquid-gas jet type negative pressure pumping system and control method thereof
CN103644090B (en) * 2013-11-28 2016-04-06 陕西科技大学 A kind of liquid vapour jet-type takes out negative pressure system and controlling method thereof
CN104264525A (en) * 2014-09-24 2015-01-07 陕西科技大学 Automatic early-warning and elimination system for water accumulation in drying cylinder of paper machine, and control method
CN108517711A (en) * 2018-04-03 2018-09-11 陕西科技大学 The control system and method for drying cylinder inlet and outlet differential pressure based on fuzzy immune PID algorithm

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Owner name: XIANYANG XIWEI AUTOMATION TECHNOLOGY CO., LTD.

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Effective date: 20150504

C41 Transfer of patent application or patent right or utility model
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Free format text: CORRECT: ADDRESS; FROM: 710021 XI'AN, SHAANXI PROVINCE TO: 712000 XIANYANG, SHAANXI PROVINCE

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Effective date of registration: 20150504

Address after: 712000, room 24, building 604, Renmin compound, Renmin West Road, Xianyang, Shaanxi

Patentee after: Xianyang West micro Automation Technology Co., Ltd.

Address before: 710021 Shaanxi province Xi'an Weiyang University Park No. 1

Patentee before: Shaanxi University of Science and Technology

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131225

Termination date: 20180716