阅读说明：本技术 一种用于原位热脱附的可调节套环式加热系统 (Adjustable lantern ring type heating system for in-situ thermal desorption ) 是由 黄海 李辉辉 田立斌 高运志 姜鸿喆 孙博成 田华 于 2021-09-16 设计创作，主要内容包括：本发明公开了一种用于原位热脱附的可调节套环式加热系统,包括：“U”型加热管以及设置于“U”型加热管内的若干电阻丝套环,所述“U”型加热管的两侧内壁上等间距开设有若干螺纹孔,所述电阻丝套环的左、右两端上设置有螺纹连接柱,电阻丝套环通过螺纹连接柱螺纹连接于螺纹孔内,电阻丝套环上缠绕设置有电阻丝,两相邻的电阻丝套环之间通过陶瓷连接柱相连接,每个电阻丝套环通过电流连接线与外部的配电系统并联,陶瓷连接柱的侧边设置有控制阀,控制阀用于控制电阻丝电流的打开与关闭。本发明提供的用于原位热脱附的可调节套环式加热系统,可根据不同深度土壤污染程度来调整对应土层的加热量,可实现精准化加热,提高了热量的利用率。(The invention discloses an adjustable lantern ring type heating system for in-situ thermal desorption, which comprises: "U" type heating pipe and set up in a plurality of resistance wire lantern rings in "U" type heating pipe, a plurality of screw holes have been seted up to equidistant on the both sides inner wall of "U" type heating pipe, be provided with the screw thread spliced pole on the left and right both ends of resistance wire lantern ring, the resistance wire lantern ring passes through screw thread spliced pole threaded connection in the screw thread hole, and the winding is provided with the resistance wire on the resistance wire lantern ring, is connected through the ceramic spliced pole between the double-phase adjacent resistance wire lantern ring, and every resistance wire lantern ring passes through current connecting line and connects in parallel with outside distribution system, and the side of ceramic spliced pole is provided with the control valve, and the control valve is used for opening and closing of control resistance wire electric current. The adjustable lantern ring type heating system for in-situ thermal desorption provided by the invention can adjust the heating quantity of the corresponding soil layer according to the soil pollution degrees at different depths, can realize accurate heating and improves the utilization rate of the heat.)

1. An adjustable collar heating system for in situ thermal desorption, comprising:

the heating device comprises a U-shaped heating pipe, a resistance wire sleeve ring, a heating wire sleeve ring and a heating wire, wherein the U-shaped heating pipe is configured to be arranged in a heating well, a plurality of threaded holes are formed in the inner walls of two sides of the U-shaped heating pipe at equal intervals, threaded connecting columns are arranged at the left end and the right end of the resistance wire sleeve ring, the resistance wire sleeve ring is in threaded connection with the threaded holes through the threaded connecting columns, a resistance wire is wound on the resistance wire sleeve ring, and two adjacent resistance wire sleeve rings are connected through the ceramic connecting columns;

the resistance wire lantern rings are arranged in the U-shaped heating tubes, and each resistance wire lantern ring is connected with an external power distribution system in parallel through a current connecting line;

the control valves are distributed on the side edges of the ceramic connecting columns and used for controlling the opening and closing of the current of the resistance wire wound on the resistance wire lantern ring.

2. The adjustable collar heating system for in situ thermal desorption of claim 1 wherein the ceramic connecting posts are rectangular pillar structures.

3. The adjustable collar heating system for in situ thermal desorption of claim 1, wherein the ceramic connecting posts and the resistance wire collar are connected by a snap fit.

4. The adjustable collar heating system for in-situ thermal desorption of claim 1, wherein the U-shaped heating tube is filled with a high temperature heat conducting medium.

5. The adjustable collar heating system for in-situ thermal desorption of claim 4, wherein the high temperature heat conducting medium is magnesium oxide powder or aluminum oxide powder.

6. The adjustable collar heating system for in-situ thermal desorption of claim 1, wherein the "U" shaped heating tube is stainless steel.

7. The adjustable collar type heating system for in-situ thermal desorption as claimed in claim 1, wherein a temperature probe connected with a control valve is further arranged at the middle position in the U-shaped heating tube.

8. The adjustable collar heating system for in-situ thermal desorption of claim 7, wherein the temperature probe is a high temperature resistant material.

9. The adjustable collar heating system for in-situ thermal desorption of claim 1, wherein the resistance wire collar is an elliptical-shaped structure.

10. The adjustable collar heating system for in situ thermal desorption of claim 1 wherein the heating well is capped with a ground barrier.

Technical Field

The invention relates to the field of soil remediation, in particular to an adjustable lantern ring type heating system for in-situ thermal desorption.

Background

The in-situ thermal desorption technology is applied to polluted land block restoration from the 70 th century, and the technical principle is that the temperature of a pollutant area is increased, the physical and chemical properties of pollutants are changed, soil pollutants are promoted to desorb into a gas phase and a water phase, then the soil pollutants are extracted to be separated from the underground environment, and the soil pollutants are transferred to the ground for treatment. At present, normal position thermal desorption engineering case is mostly to carrying out the entire body heating around the whole heater well, the interval pertinence of the depth of heating is not strong, it is according to the heating methods of difference, mainly divide into resistance heating, three kinds of types of heat-conduction heating and steam heating, wherein the heating pipe is mostly straight tube structure in the heating method of using at present, the heating method is single, it is not enough even and accurate to pollute soil heating, easily cause the heat waste, and soil pollution often has the different condition of different degree of depth soil pollution, can't adjust the heating volume that corresponds the soil layer according to polluting the degree of depth difference, there is the poor and extravagant thermal shortcoming of pertinence, thereby the energy consumption has been increased, influence the repair efficiency.

Disclosure of Invention

The invention mainly solves the technical problem of providing an adjustable lantern ring type heating system for in-situ thermal desorption, which can adjust the heating quantity of corresponding soil layers according to the soil pollution degrees at different depths, realize accurate heating, improve the utilization rate of heat, reduce energy consumption and reduce the repair cost.

In order to solve the technical problems, the invention adopts a technical scheme that: an adjustable collar heating system for in situ thermal desorption is provided, comprising: the heating device comprises a U-shaped heating pipe, a resistance wire sleeve ring, a heating wire sleeve ring and a heating wire, wherein the U-shaped heating pipe is configured to be arranged in a heating well, a plurality of threaded holes are formed in the inner walls of two sides of the U-shaped heating pipe at equal intervals, threaded connecting columns are arranged at the left end and the right end of the resistance wire sleeve ring, the resistance wire sleeve ring is in threaded connection with the threaded holes through the threaded connecting columns, a resistance wire is wound on the resistance wire sleeve ring, and two adjacent resistance wire sleeve rings are connected through the ceramic connecting columns;

the resistance wire lantern rings are arranged in the U-shaped heating tubes, and each resistance wire lantern ring is connected with an external power distribution system in parallel through a current connecting line;

the control valves are distributed on the side edges of the ceramic connecting columns and used for controlling the opening and closing of the current of the resistance wire wound on the resistance wire lantern ring.

In a preferred embodiment of the present invention, the ceramic connecting column has a rectangular column structure.

In a preferred embodiment of the invention, the ceramic connecting column is connected with the resistance wire lantern ring through a buckle.

In a preferred embodiment of the present invention, the "U" shaped heating tube is filled with a high temperature heat conducting medium.

In a preferred embodiment of the present invention, the high-temperature heat conducting medium is magnesium oxide powder or aluminum oxide powder.

In a preferred embodiment of the present invention, the "U" -shaped heating tube is made of stainless steel.

In a preferred embodiment of the invention, a temperature measuring probe connected with the control valve is further arranged in the middle position in the U-shaped heating pipe.

In a preferred embodiment of the present invention, the temperature probe is made of a high temperature resistant material.

In a preferred embodiment of the invention, the resistance wire collar is of an elliptical configuration.

In a preferred embodiment of the present invention, a surface barrier layer is disposed above the heating well.

The invention has the beneficial effects that: the adjustable lantern ring type heating system for in-situ thermal desorption can adjust the heating quantity of the corresponding soil layer according to the soil pollution degrees of different depths, can realize precise heating, improves the utilization rate of heat, reduces energy consumption, reduces the repair cost, can enable high-temperature heating to be more uniform by structurally arranging the lantern ring type resistance structure, can realize heating of a single resistance lantern ring or a plurality of resistance lantern rings through the control valve, improves the heat conduction efficiency, and reduces the meaningless consumption of heat.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic diagram of an adjustable collar heating system for in situ thermal desorption according to the present invention;

fig. 2 is an internal block diagram of an adjustable collar heating system for in situ thermal desorption according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, an embodiment of the invention provides an adjustable collar type heating system for in-situ thermal desorption, comprising: the heating device comprises a U-shaped heating pipe 2 arranged in a heating well 1 and a plurality of resistance wire lantern rings 3 arranged in the U-shaped heating pipe, wherein the U-shaped heating pipe is made of stainless steel, the resistance wire lantern rings are of an elliptical structure, a plurality of threaded holes are formed in the inner walls of the two sides of the U-shaped heating pipe at equal intervals, threaded connecting columns 4 are arranged at the left end and the right end of the resistance wire lantern rings, the resistance wire lantern rings are connected in the threaded holes through the threaded connecting columns in a threaded mode, a resistance wire 10 is wound on the resistance wire lantern rings, the two adjacent resistance wire lantern rings are connected through a ceramic connecting column 5, the ceramic connecting columns are of a rectangular upright column structure and are connected with the resistance wire lantern rings through buckles, each resistance wire lantern ring is connected with an external power distribution system 7 in parallel through a current connecting line 6, and a control valve 8 is arranged on the side edge of each ceramic connecting column, the control valve is used for controlling the opening and closing of the current of the resistance wire wound on the resistance wire lantern ring.

Specifically, the U-shaped heating tube is filled with a high-temperature heat-conducting medium 11, and the high-temperature heat-conducting medium is magnesia powder or alumina powder.

Specifically, a temperature measuring probe (not shown in the figure) connected with the control valve is further arranged at the middle position in the U-shaped heating pipe, and the temperature measuring probe is made of high-temperature-resistant materials.

Specifically, heating well top lid is equipped with ground barrier layer 9, and is specific, and ground barrier layer includes materials such as HDPE rete, gravel layer, insulating brick layer and concrete layer.

The working principle is as follows: in the specific implementation, the method comprises the following steps: the heating well penetrates through a polluted soil field to the lower part, a U-shaped heating pipe is inserted into the well, a conducting device connected with a ground power distribution system is arranged at a position 30CM away from the top end of the heating pipe, threaded holes are formed in the left inner wall and the right inner wall of the heating pipe every 20CM, a resistance wire lantern ring is arranged in the heating pipe, the resistance wire lantern ring is of an elliptical structure and is uniformly distributed on the inner wall of the heating pipe, threads connected with the threaded holes are respectively arranged at the left top end and the right top end of the resistance wire lantern ring, the resistance wire lantern ring is connected with the heating pipe through threads, a resistance wire is uniformly wound on the lantern ring in a wire winding mode and is filled with magnesium oxide powder or aluminum oxide powder in the heating pipe, and short circuit of the resistance wire is prevented;

step two: the heating system is characterized in that ceramic connecting columns are arranged on two adjacent resistance wire lantern rings, the structure is a rectangular upright column structure, the ceramic connecting columns are connected with the resistance wire lantern rings through buckles and used for electrically connecting the adjacent resistance wire lantern rings in the heating pipe, ceramic connecting lines are used for connecting current through the connecting columns, control valves are arranged on the side portions of the ceramic connecting columns, and the current of the resistance wire lantern ring resistance wires is controlled to be started and closed through the ceramic connecting lines, so that the heating system can only heat the soil polluted by the target depth, and does not heat the non-target depth, and the electric energy waste is avoided;

step three: the current connecting line is led out from the power distribution system, is connected in parallel with the resistance wire on the lantern ring through the inner wall of the heating pipe, is connected in parallel with the control valve through the ceramic connecting column and is sequentially connected with the rest lantern rings, and when the current connecting line passes through the last lantern ring, the current connecting line is sequentially connected back through the ceramic connecting column and is finally communicated with the power distribution system to form a complete heating system.

In summary, the adjustable collar type heating system for in-situ thermal desorption provided by the invention has the following beneficial effects:

(1) in the aspects of energy consumption and cost, the resistance heating system can adjust the heating quantity of the corresponding soil layer according to the soil pollution degrees at different depths, can realize accurate heating, improves the utilization rate of heat, reduces energy consumption and lowers the repair cost;

(2) in structural form, the structure is different from the conventional straight pipe type in-situ thermal desorption resistance heating pipe structure, a lantern ring type resistance structure is arranged on the structure, so that high-temperature heating is uniform, heating of a single resistance lantern ring or a plurality of resistance lantern rings can be realized through a control valve, heat conduction efficiency is improved, and heat meaningless consumption is reduced;

(3) in the aspect of repair efficiency, the system can perform accurate heating repair aiming at the difference of different pollutant properties of soil, the difference of heat dissipation at different depths, the difference of lithologic heating rates of different soil properties and the like, and improve the repair efficiency.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.