CN212130473U

CN212130473U - Novel ignition device and conveying system

Info

Publication number: CN212130473U
Application number: CN202020357824.5U
Authority: CN
Inventors: 徐斌; 张博闻; 张树川; 徐军
Original assignee: Beijing Guoliheng Clean Energy Technology Group Co ltd
Current assignee: Beijing Guoliheng Clean Energy Technology Group Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-12-11
Anticipated expiration: 2030-03-20

Abstract

The utility model discloses a novel ignition, it is established ties in proper order by a plurality of sections and forms, and each section comprises the composite fuel packaging structure who loads composite fuel in the container. The utility model also discloses a novel ignition's conveying system, it include conveyor and ignition, conveyor is including being used for carrying ignition to the conveying part of preset position in the well to and connect conveying part and ignition, and after ignition, can break off with ignition at ignition, thereby with the connecting portion that conveyor took out in the well. The utility model discloses ignition can realize simultaneously or the time delay ignition to establish the fire source in thick coal seam or tired coal seam. The conveying system adopts a flexible lowering mode, a cascade igniter is hung on a flexible cable, the igniter is lowered to a preset position through a ground winch, the flexible cable can be recovered after ignition, the cable is prevented from blocking a drilling well, the operation is simple and convenient, and the conveying device can be repeatedly used.

Description

Novel ignition device and conveying system

Technical Field

The utility model relates to a fossil energy exploitation technical field, concretely relates to an ignition and supporting conveying system for igniting underground coal seam.

Background

The underground coal gasification process requires ignition in a specific coal seam first to ignite the coal seam to form a certain combustion area, and then the gasification reaction of the whole coal seam is started. The currently disclosed underground gasification ignition modes comprise coke ignition, electric igniter ignition, silane ignition and the like, and various ignition methods generally have application limitations, such as coke ignition, and are generally suitable for ignition of large drill holes with large aperture ratio and the condition that a coal seam contains trace water; due to the limitation of heating power, electric ignition cannot be applied to small-caliber drilling generally, and an igniter cannot be taken out after ignition, so that subsequent drilling blockage is easily caused; silane ignition requires the cooperation of a special gas injection device to ensure that silane can be reliably delivered to the bottom of a well without explosion, and the ground device is complex, the ignition cost is high, and the like. Adopt the deep coal seam of underground gasification technique gasification, especially the coal seam is thick (thickness can reach tens meters) and when tired coal seam (the coal seam has the multilayer) the condition such as, current ignition mode generally can not direct application ignite, and the main problem is that coal seam thickness increases, and the ignition horizon is difficult for confirming, and the heat is difficult for direct use effective horizon, and the input of some firearm, ignition material also becomes relatively troublesome moreover, therefore needs to develop a neotype some firearm.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, and the novel ignition and conveying system that provide, ignition adopts cascade connection mode, and the solid, the liquid fuel segmentation of multiple low ignition, high energy later make up again. An ignition source is arranged in each section, so that simultaneous or delayed ignition can be realized, and a fire source is established in a thick coal seam or an accumulated coal seam. The conveying system adopts a flexible lowering mode, a cascade igniter is hung on a flexible cable, the igniter is lowered to a preset position through a ground winch, the flexible cable can be recovered after ignition, the cable is prevented from blocking a drilling well, the operation is simple and convenient, and the conveying device can be repeatedly used.

In order to achieve the above object, the present invention provides the following technical solutions:

a novel ignition device is formed by connecting a plurality of sections in series in sequence, and each section is composed of a composite fuel packaging structure which is used for filling composite fuel into a container.

Preferably, the container in at least one segment of the composite fuel encapsulation structure contains an ignition source.

Preferably, the composite fuel packaging structure section containing the ignition source is an active section, the composite fuel packaging structure section without the ignition source is a passive section, and the active section and the passive section are arranged at intervals.

Preferably, the ignition source is packaged with the composite fuel in a container and embedded in the composite fuel.

Preferably, the container containing the ignition source is also provided with a waterproof sealing device.

Preferably, the outer diameter of the container is smaller than the diameter of the wellbore.

A conveying system of a novel ignition device comprises a conveying device and the ignition device, wherein the conveying device comprises a conveying part used for conveying the ignition device to a preset position in a well, and a connecting part which is used for connecting the conveying part with the ignition device, can be disconnected with the ignition device after the ignition device is ignited and accordingly takes out the conveying device from the well.

Preferably, the delivery portion is a flexible link.

Preferably, the connecting portion includes a connector and a releaser connected to each other; the connecting part is connected with the conveying part through a connector and is connected with the tail end of the ignition device through a releaser.

Preferably, the releaser is an electrically weak type releaser comprising an electric heater and a low melting point alloy.

The utility model provides a novel ignition and conveying system has following technological effect:

1. the solid and liquid fuels with various low burning points and high energy are combined after being segmented, and an ignition source is arranged in each segment, so that simultaneous or delayed ignition can be realized, and a fire source is established in a thick coal seam or an accumulated coal seam.

2. The ignition device is basically made of combustible materials, and basically has no residue in the well after combustion, so that the blockage of the well bottom can be avoided.

3. Adopt the flexibility mode of transferring, on the flexible cable was articulated to the cascade point firearm, through the ground winch, transferred preset position with the some firearm, the flexible cable can be retrieved after the ignition, prevented that the cable from blockking up the drilling, and is easy and simple to handle, conveyor repeatedly usable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a structural diagram of a novel ignition device and a conveying system provided by the embodiment of the invention;

fig. 2 is a cross-sectional view of the novel ignition device and the conveying system provided by the embodiment of the invention;

fig. 3 is a usage state diagram of the novel ignition device and the conveying system provided by the embodiment of the present invention.

Description of reference numerals:

1. an ignition device; 2. a conveying device; 3. a winch (or hoist); 4. a power supply and control device; 5. a coal seam; 6. gas inlet well; 7. gas outlet; 8. a ground pulley; 9. a crown block; 10. a blowout prevention box;

11a, 11b, 11c, 11d, a composite fuel section; 21. a conveying section; 22. a connecting portion; 221. a connector; 222. a releaser;

111. a container; 112. a composite fuel; 113. an ignition source;

222a, an electric heater; 222b, low melting point alloy.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.

As shown in fig. 1 and 2, the novel ignition device and a conveying device for conveying the ignition device to the underground are provided.

The novel ignition device is formed by connecting a plurality of sections in series in sequence, and each section is composed of a composite fuel packaging structure which is used for filling composite fuel 112 in a container 111. The outer diameter of the container 111 is smaller than the wellbore diameter. The composite fuel 112 is any one of solid rocket fuel, liquid diesel, solid alcohol, coke, gunpowder, other high-energy fuel or a mixture of at least two of the above fuels.

An ignition source 113 is housed within the container 111 in at least one segment of the composite fuel encapsulation structure. The composite fuel packaging structure section containing the ignition source is an active section, the composite fuel packaging structure section without the ignition source is a passive section, and the active section and the passive section are arranged at intervals.

Preferably, the ignition source 113 is packaged with the composite fuel 112 in the container 111 and embedded in the composite fuel 112. In addition, a waterproof sealing device is also installed in the container 111 containing the ignition source 113.

Specifically, as shown in fig. 1 to 3, the ignition device 1 is mainly composed of two or more stages of composite fuel, in this embodiment, four stages, 11a, 11b, 11c, and 11d from the beginning to the end. Wherein, the sections are connected in series. The ignition device mainly ignites the underground coal seam through heat released in the combustion process of the composite fuel, so that ignition of the coal seam is realized. The conveyor 2 is mainly composed of a conveyor part 21 and a connecting part 22, wherein the conveyor 2 is connected with the tail end of the ignition device 1 through the connecting part 22, and the ignition device 1 can be lowered to a preset position in the well. After the ignition device 1 finishes igniting, the conveying device 2 can be lifted to the ground from the well, and the recovery and the reutilization of the conveying device are realized.

As shown in fig. 2, each section of the ignition device 1 is formed by encapsulating a composite fuel, which may be solid rocket fuel, liquid diesel, solid alcohol, coke, gunpowder, other high-energy fuel or a mixture thereof, and the composite fuel in each section may be the same or different. When the composite fuel 112 is packaged, the composite fuel is generally filled in a container 111 with a certain size, the outer diameter of the container 111 is generally slightly smaller than the diameter of a shaft (the inner diameter of a casing pipe), the length of the container 111 mainly depends on the thickness of a target coal seam and the filling amount of the composite fuel, and is generally 0.50-3.0 meters, so that the whole ignition device can pass through a region with a large well deviation.

The material and structure of the vessel 111 are selected primarily based on the properties of the composite fuel. In the case of liquid fuel, which is generally filled in a closed container, the container casing is required to be able to withstand a certain pressure. Preferably, the container shell is made of a combustible material, such as plastic, rubber, fiber, resin, etc. Solid fuel is generally filled in an open pore or open pore container, can be in a wire mesh cylindrical structure, and requires a framework to have certain strength and can bear the extrusion of the fuel; it may also be a tubular structure, with the casing being slotted or perforated or slotted and having a certain strength to withstand the pressure of the fuel and the fluid in the well. Preferably, the tubular structure has a housing of a combustible or partially combustible material, such as plastic, rubber, fiber, resin, or the like.

As shown in fig. 2, ignition source 113 is also provided within composite fuel segment 11 in order to ignite the composite fuel. The ignition source 113, which is used as initial ignition energy for igniting the composite fuel 112, generally comprises an energy triggering mechanism (e.g., electronic pulse, heating wire, spontaneous ignition agent (e.g., white phosphorus)) and a low ignition point material (e.g., nitrocotton) or ignition agent (e.g., black powder, match head).

The ignition source 113 may be classified into an electric ignition and a pneumatic ignition, depending on the manner of ignition. If an electric heating mode can be adopted, the material with low ignition point is ignited to be used as an ignition source; the ignition powder can be ignited in an electronic pulse mode to be used as a starting ignition source and the like; the container filled with white phosphorus can be opened in an air pressure mode, and the white phosphorus can ignite the low-ignition-point material after spontaneously combusting in air.

Generally, each composite fuel section is not provided with an ignition source, the ignition source is mainly determined according to the coal seam structure, the calorific value of the composite fuel, the continuous combustion time and the like, the composite fuel section containing the ignition source is called an active section, the composite fuel section without the ignition source is called a passive section, and preferably, the active section and the passive section are arranged at intervals. For example, the present embodiments 11a and 11d are passive segments, and 11b and 11c are active segments. For the active segment, the ignition source 113 is typically packaged with the composite fuel 112 in the container 111 and embedded in the composite fuel. Preferably, according to the difference of starting ignition source trigger mechanism, low ignition point material or primer, decide whether need set up waterproof sealing device, prevent in the well fluid invades the starting ignition source, cause the circuit short circuit, low ignition point material or the material that ignites wets, leads to starting the ignition failure. The waterproof sealing device is usually a closed container, and the container is provided with an external channel connected with the starting trigger mechanism, so that the ignition source has waterproof and waterproof performances, and the ignition of the ignition source is not influenced. In this embodiment, the ignition source 113 is electrically heated to ignite the composite fuel by first igniting the low ignition point material. The ignition source 113 is internally provided with an electric heating wire and is connected with the conveying device through a lead, and the simultaneous or delayed ignition can be realized by controlling the time of starting the ignition source.

As shown in fig. 1 and 2, the conveying system of the novel ignition device comprises a conveying device 2 and the ignition device. The conveyor 2 comprises a conveyor section 21 for conveying the ignition device to a predetermined position in the well, and a connecting section 22 connecting the conveyor section 21 to the ignition device and being disconnectable from the ignition device after ignition of the ignition device, so as to remove the conveyor 2 from the well.

The delivery portion 21 is a flexible link. The connecting portion 22 includes a connector 221 and a releaser 222 connected to each other; the connecting portion 22 is connected to the carrying portion 21 by a connector 221 and is connected to the rear end of the ignition device 1 via a releaser 222. The releaser 222 is an electrical weak point type releaser comprising an electric heater 222a and a low melting point alloy 222 b.

Specifically, as shown in fig. 1 and 3, in order to lower the ignition device to a target coal seam position in a well, the conveying system of the novel ignition device comprises a conveying device 2. Conveyor 2 is connected with ignition 1, can transfer ignition to predetermined position in the well to contain the power component that can start ignition source trigger mechanism, after ignition is accomplished to ignition 1, can promote conveyor to ground from 2 well insides, realize that conveyor retrieves and reuse. The conveying device 2 mainly comprises a conveying part 21 and a connecting part 22, wherein the conveying part 21 is used for conveying the ignition device 1 to a preset position in the well; the connecting part 22 is used to connect the conveying part 21 with the ignition device 1 and, after ignition of the ignition device 1, can be disconnected from the ignition device 1, so that the conveying device 2 can be taken out of the well.

The conveying part 21 can generally adopt flexible connectors such as a steel wire rope, a steel wire armored cable (such as an outer layer is the steel wire rope, an inner layer is a lead), a rubber armored cable (such as an outer layer is the lead, an inner layer is the steel wire rope and is filled with rubber) and the like, and the conveying material in which the mode is selected depends on the triggering mode of an ignition source of the ignition device, a well structure (a vertical well and a horizontal well), the difficulty degree of operation and the like. When electric triggering is adopted, an armored cable with a built-in conductor can be selected generally; when air pressure triggering is adopted, a common steel wire rope can be generally selected. In the embodiment, a steel wire rope armored cable is adopted, and a lead is connected with each ignition source.

The connecting portion 22 mainly includes a connector 221 and a releaser 222, and the connecting portion 22 is connected to a wire rope, a cable, or the like of the carrying portion 21 through the connector 221 and is connected to the rear end of the ignition device 1 through the releaser 222. When the ignition work is completed, the releaser 222 is disconnected from the ignition device 1, so that the conveyor 2 can be taken out to the ground. The form of the connector 221 mainly depends on the material of the adopted conveying part, and can be a cable connector, a steel wire rope connector and the like, the cable connector has a structure that a socket is matched with a contact pin, the general cable end is of a socket structure, the ignition device end is of a contact pin structure, and the number of cores depends on the number of ignition sources; the wire rope connector can be a rope clip, a universal connection, a rotary connection and the like. This embodiment employs cable connectors to which ignition sources 113 in composite fuel

active sections

11b, 11c are connected by respective wires.

The release 222 has a weak point mechanism that is capable of self-breaking under an external force to separate the delivery device from the ignition device, which can be classified as a mechanical weak point, an electrical weak point, or a combination of both, depending on the manner in which the release is activated. In this embodiment, the controllable releaser 222 is an electrical weak point releaser, which comprises an electric heater (or heating wire) 222a and a low-melting-point alloy (or low-softening-point material such as nylon rope or synthetic fiber) 222 b. When the releaser 222 needs to be started, the heater or the heating wire 222a is electrified, when the temperature of the heating wire reaches the melting point (or the softening point of the material) of the alloy, the connection part of the conveying device 2 and the ignition device 1 is disconnected, and the conveying part 21 is lifted up to realize the separation of the conveying device 2 and the ignition device 1.

Fig. 3 shows an embodiment of the ignition operation performed by the novel ignition device and the conveying system, after the ignition device 1 is connected with the conveying device 2, the ignition device 1 can be lowered into the air inlet well 6 by driving of the winch 3. A steel wire rope armored cable on the conveying device 2 is wound on the winch, one end of the cable is connected with a cable connector and is connected with each ignition source in the ignition device 1 through the connector; the other end of the cable is connected with a ground power supply and control device 4. The power supply and the control device can provide power for the ignition source, control the ignition source to ignite, and carry out simultaneous or delayed ignition operation. When the ignition device 1 is lowered, a ground pulley 8, a top pulley 9 and a blowout prevention box 10 are generally required to be arranged on a ground wellhead, and a cable sequentially penetrates through the top pulley 8, the top pulley 9 and the blowout prevention box 10, so that the ignition device 1 moves downwards along the center of the well to ensure the lowering process, and the ignition device does not rub against the well wall. The blowout preventer 10 is primarily used to seal the cable from air leakage during ignition. During specific ignition operation, the device further comprises a gas outlet well 7, when the ignition device 1 is lowered to a preset ignition position of the coal seam 5, the blowout prevention box is started to seal the cable, then air is continuously injected into the gas inlet well, and the air flows through the coal seam and is discharged through the gas outlet well 7. When ignition is needed, the power supply and control device 4 is started on the ground, and the ignition source releases heat to ignite the composite fuel in the ignition device 1 after being ignited. When the heat released by the composite fuel reaches the ignition point of the coal seam, the coal seam is ignited. After that, the releaser is started by the ground power supply and the control device 4, the heater in the releaser is electrified, when the temperature of the electric heating wire reaches the alloy melting point, the connection part of the conveying device and the ignition device is disconnected, and the conveying part is lifted up to realize the separation of the conveying device and the ignition device. The transport device is then recovered to the surface here by means of a winch.

Above-mentioned novel ignition and conveying system have following technological effect:

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The novel ignition device is characterized by being formed by sequentially connecting a plurality of sections in series, wherein each section is formed by a composite fuel packaging structure for filling composite fuel into a container.

2. The novel ignition device of claim 1 wherein the container in at least one segment of the composite fuel encapsulation houses an ignition source.

3. The novel ignition device of claim 2, wherein the composite fuel encapsulated structure section containing the ignition source is an active section, the composite fuel encapsulated structure section without the ignition source is a passive section, and the active section and the passive section are arranged at intervals.

4. The novel ignition device of claim 2 wherein the ignition source is packaged with the composite fuel in a container and embedded in the composite fuel.

5. The novel ignition device of claim 4, wherein the container containing the ignition source is further provided with a waterproof seal.

6. The novel ignitor of claim 1, wherein an outer diameter of the container is less than a wellbore diameter.

7. A conveying system of a novel ignition device, which is characterized by comprising a conveying device and the ignition device of any one of claims 1 to 6, wherein the conveying device comprises a conveying part for conveying the ignition device to a preset position in a well, and a connecting part which is connected with the conveying part and the ignition device, can be disconnected with the ignition device after the ignition device is ignited, and accordingly takes the conveying device out of the well.

8. The delivery system of claim 7, wherein the delivery portion is a flexible link.

9. The delivery system of claim 7, wherein the connecting portion comprises a connector and a release that are interconnected; the connecting part is connected with the conveying part through a connector and is connected with the tail end of the ignition device through a releaser.

10. The delivery system of claim 9, wherein the releaser is an electrical weak point type releaser comprising an electric heater and a low melting point alloy.