阅读说明：本技术 一种颗粒活性炭恒定功率的电热再生方法及装置 (Constant-power electrothermal regeneration method and device for granular activated carbon ) 是由 聂欣 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种颗粒活性炭恒定功率的电热再生方法及装置。该电热再生方法如下：一、将被再生的颗粒活性炭填充到再生腔室内的两块电极板之间。两块电极板的间距可调,且与电源连接。随着两块电极板的间距调整,颗粒活性炭能够在两块电极板之间流动,使得颗粒活性炭整体的长度和截面积发生变化。二、在颗粒活性炭的电阻率的过程中,调节两块电极板间距,抵消电阻率变化带来的影响,使得电热再生功率P保持恒定,直到颗粒活性炭完成电热再生。本发明解决了活性炭在再生过程中电阻率变化带来的电热再生功率变化问题,使得电热再生功率能够保持在最佳的额定功率,相比于现有技术显著提高了再生效率。(The invention discloses a constant-power electrothermal regeneration method and device for granular activated carbon. The electric heating regeneration method comprises the following steps: firstly, filling the regenerated granular activated carbon between two electrode plates in a regeneration chamber. The distance between the two electrode plates is adjustable and is connected with a power supply. Along with the adjustment of the distance between the two electrode plates, the granular activated carbon can flow between the two electrode plates, so that the length and the sectional area of the whole granular activated carbon are changed. And secondly, in the process of the resistivity of the granular activated carbon, adjusting the distance between the two electrode plates to offset the influence caused by the change of the resistivity, so that the electric heating regeneration power P is kept constant until the granular activated carbon finishes electric heating regeneration. The invention solves the problem of electric heating regeneration power change caused by resistivity change of the activated carbon in the regeneration process, so that the electric heating regeneration power can be kept at the optimal rated power, and compared with the prior art, the regeneration efficiency is obviously improved.)

1. An electrothermal regeneration method of granular activated carbon with constant power is characterized in that: filling regenerated granular activated carbon between two electrode plates in a regeneration chamber; the distance between the two electrode plates is adjustable and is connected with a power supply; along with the adjustment of the distance between the two electrode plates, the granular activated carbon can flow between the two electrode plates, so that the length and the sectional area of the whole granular activated carbon are changed;

step two, the power supply supplies power to the two electrode plates to carry out electric heating regeneration on the granular activated carbon; in the regeneration process, the resistivity of the granular activated carbon changes along with the change of temperature; in the process of changing the resistivity of the granular activated carbon, the distance between the two electrode plates is adjusted, so that the length L and the sectional area S of the whole granular activated carbon in the regeneration cavity are changed, the influence of the resistivity change on the whole resistance of the granular activated carbon is counteracted, and the electric heating regeneration power P is kept constant until the granular activated carbon completes electric heating regeneration.

2. The constant-power electrothermal regeneration method of granular activated carbon according to claim 1, wherein: in the process of electric heating regeneration, continuously detecting the input voltage U and the input current I of the whole granular activated carbon, and calculating electric heating regeneration power P; and performing negative feedback regulation on the distance between the two electrode plates by using the calculated electric heating regeneration power P, so that the electric heating regeneration power P is kept constant or fluctuates within a preset range.

3. A constant power electro-thermal regeneration method of granular activated carbon as claimed in claim 1 or 2, wherein: the power supply adopts a constant current power supply.

4. A constant power electro-thermal regeneration method of granular activated carbon as claimed in claim 1 or 2, wherein: and in the process of electric heating regeneration, the input voltage U and the input current I are displayed in real time through a display.

5. The constant-power electrothermal regeneration method of granular activated carbon according to claim 1, wherein: detecting the temperature of the granular activated carbon in the regeneration chamber through a temperature sensor, and obtaining the resistivity of the activated carbon according to the temperature value and the change relation of the resistivity of the activated carbon along with the temperature; and adjusting the distance between the two electrode plates according to the change condition of the resistivity of the activated carbon so as to keep the electric heating regeneration power P constant.

6. The constant-power electrothermal regeneration method of granular activated carbon according to claim 1, wherein: calculating the electric heating regeneration power P as U.I by detecting the input voltage U; wherein I is input current; and adjusting the distance between the two electrode plates according to the change condition of the electric heating regeneration power P, so that the electric heating regeneration power P is kept constant.

7. An electrothermal regeneration device of granular activated carbon with constant power comprises a first electrode plate (3) and a second electrode plate (4); the method is characterized in that: the device also comprises a push-pull power element; a first electrode plate (3) and two track plates are fixed on the base; the first electrode plate (3) is positioned at the same end of the two track plates; the second electrode plate (4) is connected with the two track plates in a sliding manner and is positioned between the two track plates; the base, the first electrode plate (3), the second electrode plate (4) and the two track plates form a regeneration chamber with an open top and closed other positions; the length of the regeneration chamber can be adjusted by adjusting the position of the second electrode plate (4) in a sliding way; the second electrode plate (4) is driven by a push-pull power element to slide; the first electrode plate (3) and the second electrode plate (4) are connected with a power supply; in the working process, the position of the second electrode plate (4) is adjusted by pushing and pulling the power element, so that the resistance between the first electrode plate (3) and the second electrode plate (4) is kept constant.

8. A constant power electro-thermal regenerator for granular activated carbon as claimed in claim 7 wherein: the push-pull power element adopts an air cylinder, a hydraulic cylinder or an electric push rod.

9. A constant power electro-thermal regenerator for granular activated carbon as claimed in claim 7 wherein: the base and the track plate are both made of high-temperature-resistant materials.

10. A constant power electro-thermal regenerator for granular activated carbon as claimed in claim 7 wherein: a temperature sensor (6) is fixed on the inner side of one of the track plates; the temperature sensor (6) extends into the regeneration chamber and is used for detecting the temperature value in the regeneration chamber.

Technical Field

The invention belongs to the technical field of activated carbon regeneration, and particularly relates to a constant-power electrothermal regeneration method and device for granular activated carbon.

Technical Field

The activated carbon is an excellent adsorption material with developed internal pore structure, high mechanical strength, large specific surface area, stable chemical property and strong adsorption capacity, and is widely applied to various fields of chemical industry, metallurgy, transportation, agriculture, medical and health, military, environmental protection and the like. Generally, constant current is used for electric heating regeneration; however, since the resistivity of the activated carbon changes with a change in temperature, in the process of regenerating the activated carbon using a constant current, the electric heat regeneration power is unstable due to a change in the resistance of the activated carbon, and the power is lower as the temperature is higher, thereby lowering the overall electric heat regeneration efficiency.

Disclosure of Invention

The invention aims to improve the regeneration efficiency in the regeneration process of activated carbon, so that the activated carbon can be regenerated under a constant power, and the regeneration efficiency is improved, namely, the method and the device for the constant-power electrothermal regeneration of granular activated carbon.

In a first aspect, the invention provides a constant-power electrothermal regeneration method of granular activated carbon, which comprises the following specific steps:

step one, filling the regenerated granular activated carbon between two electrode plates in a regeneration chamber. The distance between the two electrode plates is adjustable and is connected with a power supply. Along with the adjustment of the distance between the two electrode plates, the granular activated carbon can flow between the two electrode plates, so that the length and the sectional area of the whole granular activated carbon are changed.

Step two, the power supply supplies power to the two electrode plates to carry out electric heating regeneration on the granular activated carbon; in the regeneration process, the resistivity of the granular activated carbon changes along with the change of temperature; in the process of changing the resistivity of the granular activated carbon, the distance between the two electrode plates is adjusted, so that the length L and the sectional area S of the whole granular activated carbon in the regeneration cavity are changed, the influence of the resistivity change on the whole resistance of the granular activated carbon is counteracted, and the electric heating regeneration power P is kept constant until the granular activated carbon completes electric heating regeneration.

Preferably, in the process of electric heating regeneration, continuously detecting the input voltage U and the input current I of the whole granular activated carbon, and calculating the electric heating regeneration power P; and performing negative feedback regulation on the distance between the two electrode plates by using the calculated electric heating regeneration power P, so that the electric heating regeneration power P is kept constant or fluctuates within a preset range.

Preferably, the input voltage U and the input current I are displayed in real time by a display during the electro-thermal regeneration.

Preferably, the power supply adopts a constant current power supply.

Preferably, the temperature of the granular activated carbon in the regeneration chamber is detected through a temperature sensor, and the resistance rate of the activated carbon is obtained according to the temperature value and the change relation of the resistivity of the activated carbon along with the temperature; and adjusting the distance between the two electrode plates according to the change condition of the resistivity of the activated carbon so as to keep the electric heating regeneration power P constant.

Preferably, the input voltage U is detected, and the electrothermal regeneration power P is calculated as U · I; wherein I is input current; and adjusting the distance between the two electrode plates according to the change condition of the electric heating regeneration power P, so that the electric heating regeneration power P is kept constant.

In a second aspect, the invention provides a saturated activated carbon constant-power electrothermal regeneration device, which comprises a first electrode plate, a second electrode plate and a push-pull power element. The base is fixed with a first electrode plate and two track plates. The first electrode plate is positioned at the same end of the two track plates. The second electrode plate is connected with the two track plates in a sliding mode and is located between the two track plates. The base, the first electrode plate, the second electrode plate and the two track plates form a regeneration chamber with the top open and other positions closed. The length of the regeneration chamber can be adjusted by slidably adjusting the position of the second electrode plate. The second electrode plate is driven by a push-pull power element to slide. The first electrode plate and the second electrode plate are connected with a power supply. In the working process, the position of the second electrode plate is adjusted by pushing and pulling the power element, so that the resistance between the first electrode plate and the second electrode plate is kept constant.

Preferably, the push-pull power element adopts an air cylinder, a hydraulic cylinder or an electric push rod.

Preferably, the base and the track plate are both made of high-temperature resistant materials.

Preferably, a temperature sensor is fixed on the inner side of one of the track plates; the temperature sensor extends into the regeneration chamber and is used for detecting the temperature value in the regeneration chamber.

The invention has the beneficial effects that:

the invention uses a constant current power supply to carry out electric heating regeneration on the granular activated carbon, and changes the resistance of the activated carbon between the electrode plates by adjusting the distance between the two electrode plates, thereby solving the problem of unstable electric heating regeneration power caused by the change of the resistivity of the activated carbon in the regeneration process, ensuring that the electric heating regeneration power can be kept at the optimal rated power, and obviously improving the regeneration efficiency compared with the prior art.

Drawings

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

FIG. 2 is a schematic side cross-sectional view of the present invention;

fig. 3 is a graph of activated carbon resistivity as a function of temperature.

In the figure: 1 is a positive terminal; 2 is a negative terminal; 3 is a first electrode plate; 4 is a second electrode plate; 5 is a cylinder; and 6 is a temperature sensor.

Detailed Description

Example 1

As shown in fig. 1 and 2, the electric heating regeneration device for saturated activated carbon with constant power comprises a first electrode plate 3, a second electrode plate 4, a cylinder 5, a temperature sensor 6, a display and a power supply box. The base and the track plate are both made of high-temperature-resistant materials (particularly, the track plate can be continuously used in an environment of 900 ℃). The base is fixed with a first electrode plate 3 and two track plates. The first electrode plate 3 is located at the same end of the two track plates. The second electrode plate 4 is connected with the two track plates in a sliding manner and is positioned between the two track plates. The base, the first electrode plate 3, the second electrode plate 4 and the two track plates form a regeneration chamber with the top open and other positions closed. Through the position of slip regulation second electrode board 4, can the length of dynamic adjustment regeneration chamber, and then change the interval of first electrode board 3 and second electrode board 4, adjust the resistance of the active carbon between first electrode board 3 and second electrode board 4. The temperature sensor 6 is fixed on one of the track plates and extends into the regeneration chamber and is used for detecting the temperature value in the regeneration chamber so as to detect the regeneration process of the activated carbon.

The air cylinder 5 is fixed on the base and is positioned on one side of the second electrode plate 4, which is far away from the first electrode plate 3, and a piston rod of the air cylinder is fixed with the outer side surface of the second electrode plate 4; the air cylinder 5 is used for sliding the second electrode plate 4, so as to adjust the distance between the first electrode plate 3 and the second electrode plate 4. The air cylinder 5 can be replaced by an electric push rod, so that the positioning precision of the second electrode plate 4 is improved. The first electrode plate 3 and the second electrode plate 4 are 280mm × 100mm × 10mm in size, and the initial gap is 65 mm. The maximum stroke of the cylinder is 75 mm. The positive terminal 1 and the negative terminal 2 are respectively fixed on the opposite side surfaces of the first electrode plate 3 and the second electrode plate 4. An output interface of a constant current power supply in the power box is connected with the positive terminal 1 and the negative terminal 2 and is used for providing constant current for electric heating regeneration; the display is used for displaying the current value and the voltage value during the electric heating regeneration. When used granular activated carbon is added into the regeneration chamber, the granular activated carbon automatically lays in the regeneration chamber and contacts with the first electrode plate 3 and the second electrode plate 4.

During the process of electro-thermal regeneration, the temperature of the granular activated carbon rises; in the process, the resistivity of the activated carbon changes along with the change of the temperature; the resistivity of the activated carbon is shown in fig. 3 as a function of temperature; in order to keep the resistance value between the two electrode plates unchanged, the distance between the first electrode plate 3 and the second electrode plate 4 is adjusted by pulling the second electrode plate, so that the influence caused by the resistivity change in the regeneration process of the activated carbon is eliminated, and the electric heating regeneration power can be kept constant.

When the cylinder drives the second electrode plate to be far away from the first electrode plate, the distance between the first electrode plate 3 and the second electrode plate 4 is increased, the length L of the whole granular activated carbon between the first electrode plate 3 and the second electrode plate 4 is increased, the longitudinal sectional area S is reduced, and the resistance R is increased; conversely, the resistance R decreases.

The method for constant-power electric heating regeneration by using the electric heating regeneration device comprises the following specific steps:

filling saturated granular activated carbon into a regeneration chamber, wherein the top of the saturated granular activated carbon does not exceed the top of the track plate; a constant current I is supplied to the positive terminal 1 and the negative terminal 2 through a power supply box.

Step two, obtaining the resistivity of the activated carbon in real time according to the temperature value detected by the temperature sensor and the change curve of the resistivity of the activated carbon along with the temperature; according to the formula of resistanceCalculating the integral resistance of the granular activated carbon between the first electrode plate 3 and the second electrode plate 4; wherein rho is the resistivity of the granular activated carbon; l is the distance between the first electrode plate 3 and the second electrode plate 4; s is the integral longitudinal sectional area of the granular activated carbon. When the resistivity rho of the granular activated carbon changes, the cylinder drives the second electrode plate to move, so that the L/S and the rho change in the opposite direction, the overall resistance of the granular activated carbon is kept unchanged, and the granular activated carbon is kept at constant regeneration power under constant current.

And step three, after the electric heating regeneration is finished, the constant current source in the power box stops supplying power.

Example 2

This example differs from example 1 in that: in the process of electric heating regeneration, detecting the magnitude of the input voltage U in real time, and calculating electric heating regeneration power P as UI; wherein I is input current; when the electric heating regeneration power P is increased, the cylinder drives the second electrode plate 4 to move close to the first electrode plate 3, so that the overall resistance of the granular activated carbon is reduced; when the electric heating regeneration power P is reduced, the cylinder drives the second electrode plate 4 to move away from the first electrode plate 3, so that the integral resistance of the granular activated carbon is increased; so that the electrothermal regeneration power P is kept constant.

Meanwhile, the display displays the input current and the input voltage of the electric heating regeneration in real time.