阅读说明：本技术 一种除雾器及其使用方法 (Demister and using method thereof ) 是由 吕宏俊 张泽玉 吕宏远 郭义培 钟作伦 余晶 连长康 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种除雾器,包括叶片、上卡条和下卡条,所述上卡条和下卡条与所述叶片垂直布置,所述叶片顶部固定在上卡条上,所述叶片的底部固定在所述下卡条上,还包括连杆和气流传感器,所述连杆与所述叶片平行设置,所述连杆上套设有管套和驱动所述管套恢复原状的扭簧,所述管套上卷绕有薄膜,所述薄膜的端部设置有拉线的一端,所述拉线的另一端跨过所述所有叶片后绕在一个外转子电机的外壳上,所述气流传感器用于检测经过所述叶片的气流流速。(The invention discloses a demister which comprises blades, an upper clamping strip and a lower clamping strip, wherein the upper clamping strip and the lower clamping strip are arranged perpendicular to the blades, the tops of the blades are fixed on the upper clamping strip, the bottoms of the blades are fixed on the lower clamping strip, the demister further comprises a connecting rod and an airflow sensor, the connecting rod and the blades are arranged in parallel, a pipe sleeve and a torsion spring for driving the pipe sleeve to restore the original state are sleeved on the connecting rod, a thin film is wound on the pipe sleeve, one end of a pull wire is arranged at the end part of the thin film, the other end of the pull wire spans all the blades and then winds a shell of an outer rotor motor, and the airflow sensor is used for detecting the flow velocity of airflow passing through the blades.)

1. The utility model provides a demister, includes the blade, goes up card strip and lower card strip, go up card strip and lower card strip with the blade is arranged perpendicularly, the blade top is fixed on last card strip, the bottom of blade is fixed on the lower card strip, its characterized in that: the wind power generator is characterized by further comprising a connecting rod and an airflow sensor, wherein the connecting rod is arranged in parallel with the blades, a pipe sleeve and a torsion spring for driving the pipe sleeve to restore are sleeved on the connecting rod, a film is wound on the pipe sleeve, one end of a pull wire is arranged at the end part of the film, the other end of the pull wire spans over all the blades and then is wound on a shell of an outer rotor motor, and the airflow sensor is used for detecting the flow velocity of airflow passing through the blades.

2. A demister as set forth in claim 1 wherein: the connecting rod and the outer rotor motor are arranged on the lower clamping strip.

3. A demister as set forth in claim 1 wherein: one end of the torsion spring is arranged in the pipe sleeve, and the other end of the torsion spring is fixed on the connecting rod.

4. A demister as set forth in claim 2 wherein: the two ends of the blade in the length direction are respectively provided with a plurality of upper clamping strips and a plurality of lower clamping strips, and the two ends of the connecting rod and the outer rotor motor are respectively connected to the lower clamping strips after crossing the lower clamping strips.

5. The demister of claim 4, wherein: go up card strip below and be provided with first draw-in groove, the top card of blade is gone into in the first draw-in groove, the top of card strip is provided with the second draw-in groove down, the bottom card of blade is gone into in the second draw-in groove.

6. A demister as set forth in claim 2 wherein: the position of the pull wire, which is separated from the pipe sleeve, is positioned at the top of the pipe sleeve, the position of the pull wire, which is rolled into the shell, is positioned at the top of the shell, and a connecting line from the top of the pipe sleeve to the top of the shell is higher than a connecting line from the bottom of the blade.

7. The demister of claim 6, wherein: and a roller contacting a lower surface of the film.

8. The demister of claim 7, wherein: the roller is arranged at the bottom of one of the blades closest to the pipe sleeve, and the film passes through a gap between the roller and the blade when being pulled out.

9. A method of using a mist eliminator, comprising: the air flow sensor detects the flow velocity of air flow and compares the flow velocity with the flow velocity set by the demister, if the flow velocity is less than the set value for a certain time, the outer rotor motor is started, the film is pulled out from the pipe sleeve, the film covers part of the blades, the sectional area of the air flow passing through the demister is reduced, the flow velocity of the air flow is increased, if the flow velocity is greater than the set value for a certain time, the outer rotor motor rotates reversely, the pipe sleeve pulls back the film under the action of the torsion spring, part of the film is removed from the blades, the sectional area of the air flow passing through the demister is increased, and the flow velocity of the air flow is reduced.

10. A method of using a demister as set forth in claim 9, wherein: the certain time is 1 minute.

Technical Field

The invention relates to desulfurization equipment, in particular to a demister and a using method thereof.

Background

The demister (demister/mist eliminator) mainly comprises fixing devices such as wave-shaped blades, plates and clamping strips, and is easy to generate mist with the particle size of 10-60 microns in the operation process of the wet desulphurization absorption tower, wherein the mist not only contains moisture, but also dissolves sulfuric acid, sulfate, sulfur dioxide and the like, and simultaneously causes the pollution and serious corrosion of a fan, a heat exchanger and a flue, so the wet desulphurization process puts forward the requirement of demisting on the absorption equipment, and the purified gas needs to be demisted before leaving the absorption tower. The demister nozzle is one of the main parts of the demisting system, is mainly made of high-quality plastics, and has extremely high wear resistance and long service life.

The flue gas velocity through the defroster section is too high or crosses lowly and all is unfavorable for the normal operating of defroster, and the flue gas velocity of flow is too high easily causes the flue gas secondary to take water to reduce defogging efficiency, the high systematic resistance of velocity of flow is big simultaneously, and the energy consumption is high. The flow velocity through the demister section is too low, is not favorable to gas-liquid separation, is not favorable to improving defogging efficiency equally. In addition, the designed flow rate is low, the section size of the absorption tower is increased, and the investment is increased. The design flue gas flow rate should be close to the critical flow rate. According to different demister blade structures and arrangement forms, the design flow rate is generally selected to be between 3.5 m/s and 5.5 m/s. the speed at which this is concerned is determined by the flow rate of flue gas in the stack when the plant is in normal operation, but when the plant has just been started and has not yet reached full power operation, and when the plant is gradually shut down, the flow rate of flue gas in the stack is less than the set value, but the demister has poor demisting efficiency in both periods, with possible negative consequences for the subsequent equipment, and therefore there is a need for improvement.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a demister which can automatically adjust the air flow speed in the demister.

The invention also aims to provide a using method of the demister, which can effectively prolong the service life of the demister.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a demister, includes the blade, goes up card strip and lower card strip, go up card strip and lower card strip with the blade is arranged perpendicularly, the blade top is fixed on last card strip, the bottom of blade is fixed on the card strip down, still include connecting rod and airflow sensor, the connecting rod with blade parallel arrangement, the cover is equipped with pipe box and drive on the connecting rod the torsional spring of pipe box reconversion, it has the film to coil on the pipe box, the tip of film is provided with the one end of acting as go-between, the other end of acting as go-between strides around on the shell of an external rotor motor behind all blades, airflow sensor is used for detecting the process the air current velocity of flow of blade. Under normal conditions, the flue gas velocity of flow through the defroster is in the setting value of defroster, the film is whole to be convoluteed on the pipe box, at this moment, all blades all participate in the defogging of flue gas, and when the flue gas velocity of flow was less than the setting flow velocity, the motor started, drives the other end of acting as go-between and winds on motor housing, acts as go-between and pulls out the film, lets the film cover the bottom of some blades, and the through-flow area of flue gas reduces this moment, and the velocity of flow of air current increases until the velocity of flow reaches the setting value of defroster. When the flow of flue gas is gradually increased, the motor rotates in the reverse direction, the pipe sleeve winds the film back under the action of the torsion spring, the covered blades are gradually exposed at the moment, the through flow area is increased, and the speed of the airflow is reduced to the set value of the demister.

In the above technical solution, preferably, the connecting rod and the outer rotor motor are disposed on the lower clamping strip. Set up like this, the film back of pulling out shelters the bottom of blade, prevents to get into in the blade that is sheltered from at the air current, causes the jam.

In the above technical solution, preferably, one end of the torsion spring is disposed in the tube sleeve, and the other end of the torsion spring is fixed to the connecting rod.

In the above technical solution, preferably, a plurality of the upper clamping strips and a plurality of the lower clamping strips are respectively arranged at two ends of the blade in the length direction.

In the above technical scheme, preferably, a first clamping groove is arranged below the upper clamping strip, the top of the blade is clamped into the first clamping groove, a second clamping groove is arranged at the top of the lower clamping strip, and the bottom of the blade is clamped into the second clamping groove.

In the above technical solution, preferably, a position where the pull wire leaves the pipe sleeve is located at the top of the pipe sleeve, a position where the pull wire is rolled into the housing is located at the top of the housing, and a connecting line from the top of the pipe sleeve to the top of the housing is higher than a connecting line of the bottom of the blade. Set up like this, the film draws back can with the bottom in close contact with of blade, avoids the air current to sneak into from the clearance between film and the blade, simultaneously, after the liquid drop that drops from the blade fell to the film upper surface, also can be scraped by the blade in the film recovery process.

In the above technical solution, it is preferable that the film processing apparatus further includes a roller, and the roller is in contact with a lower surface of the film. Thus, during the film recycling process, the liquid drops on the lower surface of the film can be scraped off.

In the above technical solution, preferably, the roller is disposed at a bottom of one of the blades closest to the pipe sleeve, and the film passes through a gap between the roller and the blade when being drawn out.

A method for using a demister is characterized in that a gas flow sensor detects the flow velocity of gas flow and compares the flow velocity with the flow velocity set by the demister, if the flow velocity of the gas flow is less than a set value for a certain time, an outer rotor motor is started, a film is pulled out of a pipe sleeve, the film covers part of blades, the sectional area of the gas flow passing through the demister is reduced, the flow velocity of the gas flow is increased, if the flow velocity of the gas flow is greater than the set value for a certain time, the outer rotor motor rotates in a reverse direction, the pipe sleeve pulls back the film under the action of a torsion spring, part of the film is moved away from the blades, the sectional area of the gas flow passing through the demister is increased. When the air flow speed is smaller than or larger than the set value, the motor is not started immediately, but is adjusted after waiting for a period of time, so that the advantages of avoiding accidental air flow movement to cause repeated starting of the motor, saving electric energy and prolonging the service life of the motor are achieved.

The invention has the beneficial effects that: under normal conditions, the flue gas velocity of flow through the defroster is in the setting value of defroster, the film is whole to be convoluteed on the pipe box, at this moment, all blades all participate in the defogging of flue gas, and when the flue gas velocity of flow was less than the setting flow velocity, the motor started, drives the other end of acting as go-between and winds on motor housing, acts as go-between and pulls out the film, lets the film cover the bottom of some blades, and the through-flow area of flue gas reduces this moment, and the velocity of flow of air current increases until the velocity of flow reaches the setting value of defroster. When the flow of flue gas is gradually increased, the motor rotates in the reverse direction, the pipe sleeve winds the film back under the action of the torsion spring, the covered blades are gradually exposed at the moment, the through flow area is increased, and the speed of the airflow is reduced to the set value of the demister.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is a cross-sectional view taken along a-a of fig. 1.

Fig. 3 is a schematic diagram of the combination of the outer rotor motor, the film and the tube sleeve.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

referring to fig. 1 to 3, a demister includes a blade 1, an upper clip strip 2 and a lower clip strip 3, the upper clip strip 2 and the lower clip strip 3 are arranged perpendicular to the blade 1, and a plurality of upper clip strips 2 and a plurality of lower clip strips 3 are respectively arranged along both ends of the blade 1 in a length direction.

The top of blade 1 is fixed on last card strip 2, the bottom of blade 1 is fixed card strip 3 down, it is provided with first draw-in groove 21 to go up card strip 2 below, the top card of blade 1 is gone into in first draw-in groove 21, the top of card strip 3 is provided with second draw-in groove 31 down, the bottom card of blade 1 is gone into in the second draw-in groove 32.

Still include connecting rod 4, airflow sensor 5 and roller 7, connecting rod 4 with blade 1 parallel arrangement, the cover is equipped with pipe box 41 and drive on connecting rod 4 the torsional spring 42 of pipe box 41 reconversion, the one end setting of torsional spring 42 is in the pipe box 41, the other end of torsional spring 42 is fixed on connecting rod 4. A film 43 is wound on the pipe sleeve 41, one end of the film 43 is provided with one end of a pull wire 44, the other end of the pull wire 44 crosses all the blades 1 and then is wound on a shell 6 of an outer rotor motor, and the airflow sensor 5 is used for detecting the airflow velocity passing through the blades 1. The connecting rod 4 and the outer rotor motor 6 are arranged on the lower clamping strip 3. The connecting rod 4 and the outer rotor motor 6 span the plurality of lower clamping strips 3, and the two ends of the connecting rod and the outer rotor motor are respectively connected to the lower clamping strips 3. The position of the pull wire 44 departing from the sleeve 41 is positioned at the top of the sleeve 41, the position of the pull wire 44 rolling into the shell 6 is positioned at the top of the shell 6, and the connecting line from the top of the sleeve 41 to the top of the shell 6 is higher than the bottom connecting line of the blade 1.

The roller 7 is in contact with the lower surface of the film 43. The roller 7 is arranged at the bottom of the blade 1 closest to the sleeve 41, and the film 43 is drawn through the gap between the roller 7 and the blade 1.

A method for using a demister is characterized in that a gas flow sensor detects the flow velocity of gas flow and compares the flow velocity with the flow velocity set by the demister, if the flow velocity of the gas flow is less than the set value for 1 minute, an outer rotor motor is started, a film is pulled out from a pipe sleeve, the film covers part of blades, the sectional area of the gas flow passing through the demister is reduced, the flow velocity of the gas flow is increased, if the flow velocity of the gas flow is greater than the set value for 1 minute, the outer rotor motor rotates reversely, the pipe sleeve pulls back the film under the action of a torsion spring, part of the film is moved away from the blades, the sectional area of the gas flow passing through the demister is increased, and the flow velocity of.