阅读说明：本技术 一种基于高温高压锌粉的硫酸锌净化系统 (Zinc sulfate purification system based on high temperature high pressure zinc powder ) 是由 刘文武 肖宏 赵思思 梁余威 胡宇晨 梁昌良 刘伟 曾英成 黄秀华 李庭波 唐兴 于 2021-08-23 设计创作，主要内容包括：本发明提供了一种基于高温高压锌粉的硫酸锌净化系统,其特征在于,包括锌粉加热装置、锌粉喷射装置和净化容器,所述锌粉加热装置用于将锌粉加热到固定温度,所述锌粉喷射装置用于将高温锌粉组装成高压锌粉弹并将锌粉弹喷射进所述净化容器的硫酸锌溶液中,所述净化容器用于吸收锌粉与硫酸锌溶液反应生成的热量使所述硫酸锌溶液始终保持在固定温度。本发明通过控制每次锌粉弹中包含的锌粉量,以及发射锌粉弹的时间间隔,使得锌粉与硫酸锌溶液反应始终处于适宜的反应环境下,从而提高了净化效率以及降低锌粉的使用成本。(The invention provides a zinc sulfate purification system based on high-temperature and high-pressure zinc powder, which is characterized by comprising a zinc powder heating device, a zinc powder spraying device and a purification container, wherein the zinc powder heating device is used for heating zinc powder to a fixed temperature, the zinc powder spraying device is used for assembling the high-temperature zinc powder into a high-pressure zinc powder bomb and spraying the zinc powder bomb into a zinc sulfate solution of the purification container, and the purification container is used for absorbing heat generated by the reaction of the zinc powder and the zinc sulfate solution so as to keep the zinc sulfate solution at the fixed temperature all the time. According to the invention, the zinc powder amount contained in each zinc powder bomb and the time interval for launching the zinc powder bomb are controlled, so that the zinc powder and the zinc sulfate solution are reacted in a proper reaction environment all the time, thereby improving the purification efficiency and reducing the use cost of the zinc powder.)

1. A zinc sulfate purification system based on high-temperature and high-pressure zinc powder is characterized by comprising a zinc powder heating device, a zinc powder spraying device and a purification container, wherein the zinc powder heating device is used for heating zinc powder to a fixed temperature, the zinc powder spraying device is used for assembling the high-temperature zinc powder into a high-pressure zinc powder bomb and spraying the zinc powder bomb into a zinc sulfate solution of the purification container, and the purification container is used for absorbing heat generated by reaction of the zinc powder and the zinc sulfate solution so that the zinc sulfate solution is always kept at the fixed temperature;

the purification container comprises a container main body, a phase-change material lining and a temperature adjusting rod, wherein the container main body is used for bearing zinc sulfate liquid, two ends of the temperature adjusting rod are connected with the phase-change material lining, the non-two end parts of the temperature adjusting rod are positioned in the zinc sulfate liquid and can rapidly absorb heat generated by reaction of zinc powder and the zinc sulfate liquid, the absorbed heat is conducted to the phase-change material lining, and the phase-change material lining can store a large amount of heat to keep the zinc sulfate solution within a certain temperature range;

the zinc powder heating device comprises a tube body, a heating tube and a metering tube, wherein the heating tube is positioned on the upper part of the middle part of the tube body and is used for heating added zinc powder;

the zinc powder injection device comprises an inert gas box, an injection pipe, a filling assembly, a driving assembly and a control module, wherein the inert gas box is used for providing inert gas which is wrapped around zinc powder and filled in the injection pipe;

the quantity V of zinc powder in the ith zinc powder bomb_iComprises the following steps:

wherein, V_maxThe maximum volume of zinc powder contained in the zinc powder bomb, n is the number of times of spraying the zinc powder bomb, and the value range of i is 1- (n-1);

the quantity V of zinc powder in the nth time of zinc powder bomb_nComprises the following steps:

wherein, V_{General assembly}For purifyingThe total volume of zinc powder required by the zinc sulfate solution;

the time interval t' between the zinc powder bomb with the zinc powder spraying amount V and the next zinc powder spraying bomb is as follows:

wherein c is the specific heat capacity of the zinc powder, delta T is the temperature difference between the zinc sulfate solution and the zinc powder, Q is the heat released by the zinc powder participating in the replacement reaction in unit volume, and p is the heat absorption rate of the temperature adjusting rod.

2. The zinc sulfate purification system based on high-temperature and high-pressure zinc powder as defined in claim 1, wherein V is a V_maxHas a maximum value of 42.3cm³Said filling assembly being according to V_maxThe cavity volume is designed.

3. The zinc sulfate purification system based on high-temperature and high-pressure zinc powder as defined in claim 2, wherein said purification container further comprises a heat loss protective cover, said heat loss protective cover having a central injection inlet, said zinc powder injection device injecting zinc powder into the purification container through said injection inlet, said heat loss protective cover preventing sputtering and reducing heat transfer.

4. The zinc sulfate purification system based on zinc powder at high temperature and high pressure as defined in claim 3, further comprising a separation partition plate in the purification container, wherein impurities generated after purification are kept on the upper side of the separation partition plate and cannot pass through the separation partition plate, and zinc sulfate solution can permeate through the separation partition plate and is collected through a liquid outlet below the purification container.

5. The zinc sulfate purification system based on high-temperature and high-pressure zinc powder as defined in claim 4, wherein the number of times n of spraying zinc powder bombs is:

Technical Field

The invention relates to the technical field of production control, in particular to a zinc sulfate purification system based on high-temperature and high-pressure zinc powder.

Background

Zinc sulfate purification method commonly used when removing impurity metal ions in zinc sulfate solution through zinc powder and zinc sulfate solution carry out the replacement reaction, and current research shows, high-temperature and high-pressure zinc powder can improve purification efficiency, but zinc powder can produce the heat in the replacement reaction process to and the heat of high-temperature zinc powder self all can let zinc sulfate liquid heat up, and the reduction of the difference in temperature between zinc sulfate liquid and the zinc powder can weaken purification efficiency, therefore, how to control the reaction environment of zinc sulfate solution and zinc powder is the problem that needs face at present.

A number of zinc sulphate purification systems have now been developed and after extensive search and reference we have found that existing purification systems such as those disclosed in publication nos. KR1020010055872A, KR1020040106798A, CN102492842B and KR1020100010637A include: adding zinc powder into a zinc sulfate solution to perform a purification reaction, and further comprising a step of adjusting the acidity of the zinc sulfate solution after the zinc powder is added, wherein the specific operations are as follows a) detecting the BT value of the zinc sulfate solution after the zinc powder is added; b) adding an acidic solution to the zinc sulphate solution according to the BT value obtained in a); c) repeating the steps a) to b) until the BT value of the zinc sulfate solution is 1.2-2.0. But the system improves the purification efficiency by controlling the acidity and alkalinity, and compared with the purification with high-temperature and high-pressure zinc powder, the purification efficiency is low;

disclosure of Invention

The invention aims to provide a zinc sulfate purification system based on high-temperature and high-pressure zinc powder aiming at the defects,

the invention adopts the following technical scheme:

a zinc sulfate purification system based on high-temperature and high-pressure zinc powder is characterized by comprising a zinc powder heating device, a zinc powder spraying device and a purification container, wherein the zinc powder heating device is used for heating zinc powder to a fixed temperature, the zinc powder spraying device is used for assembling the high-temperature zinc powder into a high-pressure zinc powder bomb and spraying the zinc powder bomb into a zinc sulfate solution of the purification container, and the purification container is used for absorbing heat generated by reaction of the zinc powder and the zinc sulfate solution so that the zinc sulfate solution is always kept at the fixed temperature;

the purification container comprises a container main body, a phase-change material lining and a temperature adjusting rod, wherein the container main body is used for bearing zinc sulfate liquid, two ends of the temperature adjusting rod are connected with the phase-change material lining, the non-two end parts of the temperature adjusting rod are positioned in the zinc sulfate liquid and can rapidly absorb heat generated by reaction of zinc powder and the zinc sulfate liquid, the absorbed heat is conducted to the phase-change material lining, and the phase-change material lining can store a large amount of heat to keep the zinc sulfate solution within a certain temperature range;

the zinc powder heating device comprises a tube body, a heating tube and a metering tube, wherein the heating tube is positioned on the upper part of the middle part of the tube body and is used for heating added zinc powder;

the zinc powder injection device comprises an inert gas box, an injection pipe, a filling assembly, a driving assembly and a control module, wherein the inert gas box is used for providing inert gas which is wrapped around zinc powder and filled in the injection pipe;

the quantity V of zinc powder in the ith zinc powder bomb_iComprises the following steps:

wherein, V_maxThe maximum volume of zinc powder contained in the zinc powder bomb, n is the number of times of spraying the zinc powder bomb, and the value range of i is 1- (n-1);

the quantity V of zinc powder in the nth time of zinc powder bomb_nComprises the following steps:

wherein, V_{General assembly}The total volume of zinc powder required for purifying the zinc sulfate solution;

the time interval t' between the zinc powder bomb with the zinc powder spraying amount V and the next zinc powder spraying bomb is as follows:

wherein c is the specific heat capacity of the zinc powder, delta T is the temperature difference between the zinc sulfate solution and the zinc powder, Q is the heat released by the zinc powder participating in the replacement reaction in unit volume, and p is the heat absorption rate of the temperature adjusting rod;

further, said V_maxHas a maximum value of 42.3cm³Said filling assembly being according to V_maxDesigning the volume of the cavity;

furthermore, the purifying container also comprises a heat dissipation protective cover, the center of the heat dissipation protective cover is provided with a spraying inlet, the zinc powder spraying device sprays zinc powder into the purifying container through the spraying inlet, and the heat dissipation protective cover plays roles in preventing sputtering and weakening heat transfer;

further, the purification container also comprises a separation clapboard inside, when impurities generated after purification are retained on the upper side of the separation clapboard and cannot pass through the separation clapboard, zinc sulfate solution can penetrate through the separation clapboard and is collected through a liquid outlet below the purification container;

further, the number n of times that the zinc powder bomb needs to be sprayed is as follows:

the beneficial effects obtained by the invention are as follows:

this system stabilizes the purification environment through two aspects, firstly utilize the container to absorb the heat and come the heat that the anti-reaction produced, secondly control the quantity and the injection frequency of zinc powder, the container absorbs the heat through the temperature regulation pole, and utilize phase change material to come the heat-retaining, make unnecessary heat can be quick transmit phase change material from the solution in, and do not arouse great adverse effect, obtain the zinc powder quantity that purification efficiency is the highest through actual test, and use this to constantly reduce the zinc powder content in subsequent zinc powder bullet as the benchmark, the time interval that two zinc powder bullets of strict control sprayed, make the zinc powder bullet of spraying can both accomplish the replacement reaction under suitable environment every time.

Drawings

The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

FIG. 1 is a schematic view of an overall structural framework;

FIG. 2 is a schematic view showing the direction of heat transfer in the purge vessel;

FIG. 3 is a schematic view of a zinc powder heating device;

FIG. 4 is a schematic diagram of a zinc powder bomb assembly injection flow;

FIG. 5 is a graph showing the relationship between the volume of zinc powder and the purification efficiency.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The first embodiment.

The embodiment provides a zinc sulfate purification system based on high-temperature and high-pressure zinc powder, which comprises a zinc powder heating device, a zinc powder spraying device and a purification container, wherein the zinc powder heating device is used for heating the zinc powder to a fixed temperature, the zinc powder spraying device is used for assembling the high-temperature zinc powder into a high-pressure zinc powder bomb and spraying the zinc powder bomb into a zinc sulfate solution of the purification container, and the purification container is used for absorbing heat generated by the reaction of the zinc powder and the zinc sulfate solution so that the zinc sulfate solution is always kept at the fixed temperature;

the purification container comprises a container main body, a phase-change material lining and a temperature adjusting rod, wherein the container main body is used for bearing zinc sulfate liquid, two ends of the temperature adjusting rod are connected with the phase-change material lining, the non-two end parts of the temperature adjusting rod are positioned in the zinc sulfate liquid and can rapidly absorb heat generated by reaction of zinc powder and the zinc sulfate liquid, the absorbed heat is conducted to the phase-change material lining, and the phase-change material lining can store a large amount of heat to keep the zinc sulfate solution within a certain temperature range;

the zinc powder heating device comprises a tube body, a heating tube and a metering tube, wherein the heating tube is positioned on the upper part of the middle part of the tube body and is used for heating added zinc powder;

the zinc powder injection device comprises an inert gas box, an injection pipe, a filling assembly, a driving assembly and a control module, wherein the inert gas box is used for providing inert gas which is wrapped around zinc powder and filled in the injection pipe;

the quantity V of zinc powder in the ith zinc powder bomb_iComprises the following steps:

wherein, V_maxThe maximum volume of zinc powder contained in the zinc powder bomb, n is the number of times of spraying the zinc powder bomb, and the value range of i is 1- (n-1);

the quantity V of zinc powder in the nth time of zinc powder bomb_nComprises the following steps:

wherein, V_{General assembly}The total volume of zinc powder required for purifying the zinc sulfate solution;

the time interval t' between the zinc powder bomb with the zinc powder spraying amount V and the next zinc powder spraying bomb is as follows:

wherein c is the specific heat capacity of the zinc powder, delta T is the temperature difference between the zinc sulfate solution and the zinc powder, Q is the heat released by the zinc powder participating in the replacement reaction in unit volume, and p is the heat absorption rate of the temperature adjusting rod;

the V is_maxHas a maximum value of 42.3cm³Said filling assembly being according to V_maxDesigning the volume of the cavity;

the purifying container also comprises a heat dissipation protective cover, the center of the heat dissipation protective cover is provided with a spraying inlet, the zinc powder spraying device sprays zinc powder into the purifying container through the spraying inlet, and the heat dissipation protective cover plays roles in preventing sputtering and weakening heat transfer;

the purification container also comprises a separation clapboard inside, when impurities generated after purification are kept on the upper side of the separation clapboard and cannot pass through the separation clapboard, zinc sulfate solution can penetrate through the separation clapboard and is collected through a liquid outlet below the purification container;

the number of times n required to spray the zinc powder bomb is:

example two.

The embodiment includes all the contents of the above embodiment, and with reference to fig. 1, the embodiment provides a zinc sulfate purification system based on high-temperature and high-pressure zinc powder, which includes a zinc powder injection device, a zinc powder heating device, and a purification container, where the zinc powder heating device heats zinc powder and injects the heated zinc powder into the zinc powder injection device, the zinc powder injection device wraps a layer of high-pressure inert gas outside the high-temperature zinc powder to form a zinc powder bomb, and injects the zinc powder bomb into a zinc sulfate solution in the purification container, and the purification container is used for storing the zinc sulfate solution and providing an environment with stable temperature, so that the zinc powder in the zinc powder bomb can rapidly react with the zinc sulfate solution to replace other metal impurities;

the purge vessel comprising a body configured with at least one sidewall and a bottom defining a phase change material liner vessel, and a phase change material liner disposed within the body, the phase change material liner configured to be disposed in the phase change material liner vessel;

the purifying container also comprises a heat dissipation protective cover which is arranged at the open end of the purifying container, is detachably connected to the top end of the main body or the phase change material lining and at least partially covers the purifying container;

the heat dissipation protective cover comprises an injection inlet formed in a central body of the heat dissipation protective cover, the injection inlet allows the zinc powder injection device to inject high-temperature and high-pressure zinc powder into the purification container, the purification container also comprises a separation clapboard, and the separation clapboard is arranged at the periphery, is in contact with the phase change material lining and is provided with a certain interval when meeting the bottom of the purification container;

the heat loss protective cover is configured to be operatively removably engaged with the phase change material liner in a substantially liquid-tight manner, and specifically, a retaining ring is provided on the heat loss protective cover and is threadedly engaged with the phase change material liner through an inner surface of the retaining ring; the heat dissipation protective cover further comprises a sealing member, wherein the sealing member is connected to the outer surface of the retaining ring in a surrounding manner;

the phase change material liner has a cavity in which a phase change material configured to maintain a desired temperature is disposed, and in conjunction with fig. 2, the phase change material is in contact with the temperature adjustment rod such that thermal energy is transferred between the temperature adjustment rod and the phase change material, and the phase change material liner is configured to be airtight such that liquid in the purification vessel does not leak or migrate into the cavity in the phase change material;

the two ends of the temperature adjusting rod are fixed in the phase-change material lining, a plurality of temperature adjusting rods are arranged in the purifying container, the temperature adjusting rods are arranged in horizontal planes with different heights, the horizontal planes are in equal-difference distribution, two temperature adjusting rods are arranged in the same horizontal plane, the two temperature adjusting rods are parallel to each other and have a distance (1/3) D, the D is the inner diameter of the phase-change material lining, the distance from the circle center of the phase-change material lining to the temperature adjusting rods is (1/6) D, high-temperature and high-pressure zinc powder cannot touch the temperature adjusting rods when being sprayed into the purifying container, and the temperature adjusting rods can quickly absorb the heat of the zinc sulfate solution heated by the high-temperature and high-pressure zinc powder and keep the zinc sulfate solution within a preset temperature range;

with reference to fig. 2, the inside of the purification container includes one or more heat sinks disposed in the phase-change material lining cavity, the heat sinks are connected to the inner wall of the purification container, a plurality of heat conducting pipes are disposed in the heat sinks, the heat conducting pipes are connected between the inner wall of the purification container and the phase-change material, and the heat conducting pipes are made of high heat conducting metal;

the zinc powder heating device is of a pipeline structure, one end of the zinc powder heating device is a zinc powder adding port, the other end of the zinc powder heating device is inserted into the zinc powder spraying device, a heating pipe is arranged inside a part, close to the zinc powder adding port, in the middle of the zinc powder heating device, a metering pipe is arranged between the heating pipe and the zinc powder spraying device, and the metering pipe is used for controlling the amount of zinc powder entering the zinc powder spraying device;

with reference to fig. 3, the heating tube is a container with upper and lower ends capable of being opened and closed, a heating device is mounted on the outer wall of the heating tube, the wall of the heating tube has good thermal conductivity, when zinc powder is added, the lower opening of the heating tube is closed, the upper opening is opened, after the zinc powder is added, the upper opening is closed and the heating device is started, and after the zinc powder in the heating tube is heated for a certain time, the lower opening is opened, so that high-temperature zinc powder enters the metering tube;

the metering pipe is a long and thin structure, a valve is arranged below the metering pipe, the amount of zinc powder in the zinc powder injection device is controlled by controlling the opening time of the valve, the cross section of the metering pipe is S, and the volume V of the zinc powder entering the zinc powder injection device is as follows:

V＝S·kt；

wherein k is the dropping rate of the zinc powder, obtained through actual test, and t is the time for opening the valve;

with reference to fig. 4, the zinc powder injection device includes an inert gas tank, an injection pipe, a loading assembly, a driving assembly and a control module, the loading assembly is installed inside the injection pipe, the loading assembly is provided with two connectors, one connector is connected with an output end of the heating pipe, the other connector is connected with an output end of the inert gas tank, the heating pipe, the inert gas tank and the connectors are detachably connected, zinc powder is wrapped by inert gas in the loading assembly to form a zinc powder bomb, the zinc powder bomb moves towards the front end of the injection pipe under the driving of the driving assembly, and the control module opens a blocking sheet at the front end of the injection pipe and improves the pressure formed by the driving assembly, so that the zinc powder bomb quickly breaks away from the injection pipe and enters zinc sulfate solution;

the inside of the injection pipe and the inside of the filling assembly are filled with inert gas provided by the inert gas box, the air pressure inside the injection pipe is higher than the standard atmospheric pressure, the driving assembly is a sealing pipe arranged at the tail part of the injection pipe, one end of the sealing pipe is a valve capable of being opened and closed, the other end of the sealing pipe is a piston, when the valve is opened, the sealing pipe is communicated with the injection pipe and is in the same air pressure, after the valve is closed, the position of the piston is adjusted to enable the air pressure inside the sealing pipe to be higher than the air pressure inside the injection pipe, when the valve is opened, the high pressure inside the sealing pipe can push zinc powder in the injection pipe to move forwards, and the driving assembly provides different driving forces according to different positions of the piston when the valve is opened;

the filling assembly comprises a spherical chamber, when zinc powder enters the spherical chamber, the supply of inert gas is controlled to enable the air pressure in the chamber to be consistent with the air pressure in the injection pipe, a layer of film is generated on the inner wall of the spherical chamber, the inert gas in the film and the zinc powder in the film form a zinc powder bullet, and the film cannot break in the injection pipe because the air pressure formed by the inert gas in the film is the same as the air pressure in the injection pipe.

Example three.

The present embodiment includes all the contents of the above embodiments, the control module of the present embodiment is used to control the blocking piece of the injection pipe, the valve below the metering pipe, the valve of the driving assembly, and the piston of the driving assembly, for the convenience of control, the valve below the metering pipe is also arranged on the zinc powder injection device, and the control module controls the amount of zinc powder injected into the zinc sulfate solution at each time and the time interval between two adjacent zinc powder injections by controlling the above components, so that the zinc powder injection at each time can achieve the most efficient purification effect;

total zinc dust volume V required for zinc sulphate solution purification_{General assembly}Comprises the following steps:

wherein, V_yM is the volume of the zinc sulphate solution in the purifying vessel_zIs the mass of impurities in the zinc sulphate solution per unit, rho_ZnIs the density of the zinc powder;

referring to FIG. 5, in order to react zinc powder with a zinc sulfate solution in an ideal environment, the amount of zinc powder in the zinc powder bomb should not be too high, otherwise the zinc sulfate solution would exceed an appropriate temperature during the reaction, and the amount of zinc powder in the zinc powder bomb should not be too low to ensure efficiency, and the amount of zinc powder contained in each zinc powder bomb has an upper limit V_maxAnd a lower limit V_minAnd satisfies the following conditions:

the number n of the zinc powder bullets to be sprayed is as follows:

after each zinc powder injection shot, the impurities in the zinc powder solution are reduced, so the zinc powder amount in the zinc powder shot needs to be reduced gradually, and the zinc powder amount V in the ith zinc powder shot_iComprises the following steps:

wherein the value range of i is 1 to (n-1);

the quantity V of zinc powder in the nth time of zinc powder bomb_nComprises the following steps:

the time interval t' between the zinc powder bomb with the zinc powder spraying amount V and the next zinc powder spraying bomb is as follows:

wherein c is the specific heat capacity of the zinc powder, delta T is the temperature difference between the zinc sulfate solution and the zinc powder, Q is the heat released by the zinc powder participating in the replacement reaction in unit volume, and p is the heat absorption rate of the temperature adjusting rod.

Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.

Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.

In conclusion, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that these examples are illustrative only and are not intended to limit the scope of the invention. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.