CN2646620Y - High vacuum heating furnace - Google Patents
High vacuum heating furnace Download PDFInfo
- Publication number
- CN2646620Y CN2646620Y CN 03266059 CN03266059U CN2646620Y CN 2646620 Y CN2646620 Y CN 2646620Y CN 03266059 CN03266059 CN 03266059 CN 03266059 U CN03266059 U CN 03266059U CN 2646620 Y CN2646620 Y CN 2646620Y
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- heater
- heat
- heating furnace
- high vacuum
- vacuum heating
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Abstract
The utility model discloses a high vacuum heater, which consists of a stove, a burning device, a control device, a heat transmission and absorbing device and a steam phase adjusting device; wherein the top of the stove is provided with a fluid injection valve and a safe valve; the burning device comprises a fire tube and a gas pipe which are positioned at inner bottom of the stove; a chimney, a burner, a fuel supplying pipeline and a port fire are arranged on the outer of the stove top; the heat transmission and absorbing device comprises one or more group heating coils which are positioned in the stove inner top; and the steam phase adjusting device comprises a liquid level control valve, a pressure sensor, a fluid level switch and a perch liquid tank. The tiptop liquid plane of the perch liquid tank is higher than the top of the stove, and the perch liquid tank is communicated the bottom of the stove through a pipeline and a liquid level control valve. The liquid level control valve is connected to the liquid level switch and the electrical signals of the pressure sensor respectively. The utility model is able to realize the aims that realistic changes hot carrier effectively change phase and exchanges heat and obtains a high outer heat transmission modulus of the heating coil.
Description
Technical field
The utility model relates to a kind of indirect heated component, more particularly, relate to a kind of high-purity vapour phase heat carrier that utilizes and realize the high vacuum heating furnace of indirect as heat transfer medium, this high vacuum heating furnace can be widely used in industries such as oil, petrochemical industry have demand for heat to well stream or other process fluid (the following process fluid that all claims) etc. occasion.
Background technology
Up to the present, boiler manufacturers more both domestic and external have released some and have utilized the heating furnace of vapour phase heat carrier as the heat transfer medium indirect, and these heating furnaces all are to utilize the phase-change heat transfer principle of heat carrier to realize the indirect process fluid.But these heating furnaces are in start-up course, because the liquid level of the liquid phase heat carrier of injection heating furnace body inside is higher than the element that heats vaporization section and (is located at the heater of heating furnace body inside, as fire tube and smoke pipe), be lower than simultaneously the heat(ing) coil that is used for the indirect process fluid again, therefore, after fluid injection finishes, can leave a large amount of disadvantageous fixed gases (air) at enclosure space (body of heater) internal memory of heating furnace.And in order to get rid of the fixed gas in the body of heater, with the vapour phase heating space of formation higher degree, and in order to increase the heat-transfer effect of heat transfer medium, present existing heating furnace is general to adopt following two kinds of methods to remove fixed gas: one, the method for " vapour purging "; Two, utilize the method for vavuum pump suction.Wherein the method for " vapour purging " is after fluid injection finishes, the top of heating furnace body is communicated with atmosphere, start burner, heat carrier is vaporized in heating process, thereby the fixed gas in the body of heater is got rid of in the rolling action that utilizes the vapour phase heat carrier that generates, after being discharged to a certain degree, and the top of closed furnace body, with isolated from atmosphere, form the vapour phase and the liquid phase space of sealing.And the method for vavuum pump suction is after fluid injection finishes, closed furnace body, with isolated from atmosphere, then utilize vavuum pump to extract the interior fixed gas of body of heater out, after being extracted into to a certain degree, start burner, heat carrier is vaporized in heating process, to be heated after uniform temperature, use the fixed gas in the vavuum pump suction body of heater again, then close aspiration, continue to add the vapour phase and the liquid phase space of thermosetting sealing.Though, utilize two kinds of methods of above-mentioned " vapour purging " and vavuum pump suction can reach certain vacuum, but utilize these two kinds of methods still to be difficult to reach the vapour phase heat carrier space of higher degree, and through facts have proved, when the fixed gas that contains 1% in the vapor phase space, the outer heat transfer coefficient of the pipe of heat(ing) coil will reduce by 60%.Utilize the heating furnace of the method eliminating fixed gas of " vapour purging " also to have problem of environment pollution caused in addition at present owing to adopt organic heat carrier.
In view of this, creator in the utility model relies on it to be engaged in the experience and the practice of relevant industries for many years, and through concentrating on studies and developing, finally create and a kind ofly can reach high-purity vapour phase heat carrier heating space, thereby effectively increase the high vacuum heating furnace that the heat(ing) coil heat transfer coefficient promptly increases heat transfer efficiency.
Summary of the invention
Main purpose of the present utility model is to solve existing heating furnace and has the problem that vapour phase purity is low, heat exchange efficiency is low.
High vacuum heating furnace in the utility model mainly includes body of heater, burner, control device, heat absorption transmitting device and vapour phase adjusting device, wherein:
Described body of heater is housing sealing, that be used to hold heat carrier, is provided with the safety valve that is used to inject the liquid-filling valve of heat carrier and guarantees security of operation at the top of this housing;
Described burner includes fire tube and the smoke pipe that is located at the inner bottom side of body of heater, be located at chimney, burner, fuel supply pipe road and the igniter of described body of heater outside, fuel supply pipe road, burner, fire tube, smoke pipe and chimney fuse, and are in the junction and are tightly connected;
Described heat absorption transmitting device comprises at least one group of heat(ing) coil that is arranged on the inner top side of body of heater, is used for the indirect process fluid, and input, the output of this heat(ing) coil all extend outside the body of heater, and are connected with the conveyance conduit of process fluid;
Described vapour phase adjusting device is located at the outside of body of heater, this vapour phase adjusting device includes fluid level control valve, liquid-level switch and high-order liquid case, wherein, the highest liquid level face in the high-order liquid case is higher than the end face of described body of heater, this high position liquid case is connected with the bottom of described body of heater by pipeline, fluid level control valve, and described fluid level control valve is connected with the liquid-level switch signal of telecommunication.
In addition, described high-order liquid case can be provided with an overfall that is connected with outside other storage facilities at its top, guarantees that body of heater inside all filled with heat carrier.
In addition, described heat carrier can be hydrate, conduction oil or other heat carrier of water, alcohols, alcohols.
In addition, described smoke pipe and heat(ing) coil can be common light pipes, also can be efficient heat pipes such as finned tube.
In addition, described body of heater has heat-insulation layer in its arranged outside, and galvanized iron sheet, aluminium skin or stainless steel sheet| protective layer are set outside heat-insulation layer.
In addition, described vapour phase adjusting device can also include a pressure sensor that is used to measure the inner vapor phase space pressure of body of heater, and this pressure sensor is connected with the described fluid level control valve signal of telecommunication.
In the utility model by the indirect heater of high-purity vapour phase heat carrier as heat transfer medium, can in body of heater, form high-purity vapour phase heating space fast and efficiently, to obtain the very high outer heat transfer coefficient of heat(ing) coil pipe, the heat transfer efficiency height, greatly reduce the heat exchange area of heat(ing) coil, reduce the volume of body of heater, save manufacturing cost, reduce and take up an area of the space.
Description of drawings
The specific embodiment of the utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is that body of heater is the structural representation of the heating furnace of integral structure in the utility model;
Fig. 2 is that body of heater is the structural representation of the heating furnace of split modular structure in the utility model.
The specific embodiment
Embodiment one
As shown in Figure 1, the high vacuum heating furnace among this embodiment is applicable to lower-powered occasion.High vacuum heating furnace among this embodiment mainly includes a body of heater 1, a burner 2, control device (not shown), a vapour phase adjusting device 3, one group of heat(ing) coil 4, a liquid-filling valve 5, a safety valve 6 and sewage draining exit 7.Wherein:
Body of heater 1 includes a housing 10 sealing, that be used to hold heat carrier, and this housing 10 has heat-insulation layer 11 in its arranged outside, and is outside equipped with protective layer (not shown)s such as galvanized iron sheet, aluminium skin or stainless steel sheet| at heat-insulation layer 11.This body of heater 1 is provided with the liquid-filling valve 5 that supplies to inject heat carrier 8 usefulness, the safety valve 6 of guaranteeing security of operation at its top, be provided with a sewage draining exit 7 in its bottom simultaneously, so that regularly get rid of the sediment in the body of heater 1, and the service efficiency of raising heating furnace.Wherein, the structure and the operation principle of liquid-filling valve 5, safety valve 6 and sewage draining exit 7 are prior art, therefore describe in detail no longer separately.
Control device mainly is for detection of the automatic control of finishing heating furnace, Load Regulation and various parameter, state, fault alarm etc., this control device is an existing mature technology, can under without any creative work, realize as those skilled in the art, therefore, no longer describe in detail in the present embodiment.
Heat(ing) coil 4 is positioned at the top side of body of heater 1 inside, and its input, output 40,41 all extend body of heater 1 outside, and are connected with the process fluid conveyance conduit.
Vapour phase adjusting device 3 includes a fluid level control valve 30, a liquid-level switch 31 and a high-order liquid case 32, wherein, high-order liquid case 32 is fixed on the outside top of body of heater 1 by the mode of welding (also can be that bolt connects), this high position liquid case 32 is provided with an overfall 33 that is connected with other storage facilities at its top, its bottom is connected with the bottom of body of heater 1 by pipeline 34, fluid level control valve 30, and this fluid level control valve 30 is connected with liquid-level switch 31 signals of telecommunication.
The operation principle of high vacuum heating furnace in the present embodiment, process are as follows:
At first open liquid-filling valve 5 toward the body of heater 1 inner heat carrier 8 that injects, this heat carrier 8 can be water, alcohols, alcohols hydrate, conduction oil or other heat carrier, in high-order liquid case 32, be full of heat carrier, whether whether high-order liquid case 32 is full of heat carrier can flow out heat carrier by overfall 33 and judge, at this moment, fluid level control valve 30 is in normal opening.After treating that fluid injection finishes, close liquid-filling valve 5, starting burner 2 heats, in heating process, liquid phase heat carrier in the body of heater 1 is progressively vaporized and is become vapour phase, produce vapor phase space, and unnecessary liquid phase heat carrier is discharged to high-order liquid case 32, overflows to other storage facilities by overfall 33 again via fluid level control valve 30, pipeline 34.When the liquid level of body of heater 1 internal heat carrier 8 drops to certain position, in the closed position by liquid-level switch 31 locking fluid level control valves 30, thus obtain highly purified vapour phase heat carrier space.Open the flow process of heat(ing) coil 4 this moment again, make the process fluid heat(ing) coil 4 of flowing through, so, the vapour phase heat carrier is passed to process fluid by heat(ing) coil 4 with latent heat, the vapour phase heat carrier that discharges behind the latent heat undergoes phase transition, and condenses into behind the drop by the gravity liquid level that falls back, carries out post bake, so move in circles, realize continuous heat process fluid.
High vacuum heating furnace in the present embodiment is by means of being located at the vapour phase adjusting device 3 that can fast, efficiently generate and regulate body of heater 1 top condensing heat-exchange section vapour phase volume, pressure and purity on the body of heater 1, promptly in the vapour phase generative process, play the effect of vapour phase pressure in fluid-tight and the control body of heater 1, make body of heater 1 inner acquisition one have highly purified vapor phase space by means of the high-order liquid case 32 in the vapour phase adjusting device 3.
Embodiment two
As shown in Figure 2, the high vacuum heating furnace in the present embodiment is applicable to more powerful occasion, is applicable to the demanding situation of process fluid outlet temperature that is heated simultaneously.High vacuum heating furnace among this embodiment mainly includes a body of heater 1, a burner 2, control device (not shown), a vapour phase adjusting device 3, one group of heat(ing) coil 4, a liquid-filling valve 5, a safety valve 6 and sewage draining exit 7.Wherein:
Body of heater 1 includes upper furnace body 12 and lower furnace body 13, is provided with heat-insulation layer 11 at the outer surface of this upper and lower body of heater 12,13, and in the arranged outside of heat-insulation layer 11 protective layer (not shown)s such as galvanized iron sheet, aluminium skin or stainless steel sheet| is arranged.Upper furnace body 12 and lower furnace body 13 are tightly connected by connector, wherein, upper furnace body 12 is provided with a liquid-filling valve 5 for injection heat carrier 8 usefulness, guarantees the safety valve 6 of security of operation at its top, be provided with a sewage draining exit 7 simultaneously in the bottom of lower furnace body 13, so that regularly get rid of the sediment in the body of heater 1, improve the service efficiency of heating furnace.The structure and the operation principle of liquid-filling valve 5, safety valve 6 and sewage draining exit 7 are prior art, therefore describe in detail no longer separately.
Therefore identical among burner 2, control device and the embodiment one, no longer describe in detail.
Heat(ing) coil 4 is arranged on the inside of upper furnace body 12, the outside that its input, output 40,41 all extend upper furnace body 12, and be connected with the conveyance conduit of process fluid respectively, in this embodiment, the best installation form of heat(ing) coil 4 is vertical the installation, but also can take level to install according to different situations, in addition, emphasize a bit at this, the quantity of heat(ing) coil 4 also can change according to the power of heating furnace and the quantity that is heated process fluid in the utility model, is not restricted to a group described in the present embodiment.
Vapour phase adjusting device 3 includes the pressure sensor 35 that a fluid level control valve 30, a liquid-level switch 31, one high-order liquid case 32 and are used for MEASUREMENT OF STEAM phase space pressure, wherein, high-order liquid case 32 is fixed on the top in upper furnace body 12 outsides by the modes of welding (or bolt connection), makes the top of high-order liquid case 32 be higher than the top of upper furnace body 12.Be provided with an overfall 33 that is connected with other storage facilities at the top of high-order liquid case 32, the bottom is connected with the bottom of body of heater 1 by pipeline 34, fluid level control valve 30, fluid level control valve 30 is connected with liquid-level switch 31, pressure sensor 35 signals of telecommunication simultaneously, and is controlled automatically by pressure sensor 35.Wherein pressure sensor 35 places the top of upper furnace body 12.
The operation principle of high vacuum heating furnace in the present embodiment, process are as follows:
At first open liquid-filling valve 5, inject heat carrier 8 in body of heater 1, at this moment, fluid level control valve 30 is opening, is full of heat carrier in high-order liquid case 32.After treating that fluid injection finishes, close liquid-filling valve 5, start burner 2 and heat, at this moment, fluid level control valve 30 is in the closed position.In heating process, liquid phase heat carrier in the body of heater 1 is progressively vaporized and is become vapour phase, produce vapor phase space, this moment by the switch of pressure sensor 35 control fluid level control valves 30 (when the pressure of vapor phase space is higher than going up in limited time of a certain setting value, fluid level control valve 30 is opened, when the pressure of vapor phase space be lower than this setting value following in limited time, fluid level control valve is closes).In the production process of vapor phase space, unnecessary liquid phase is discharged to high-order liquid case 32, overflows to other storage facilities by overfall 33 again via fluid level control valve 30, pipeline 34.When the liquid level for the treatment of heat carrier 8 in the body of heater 1 dropped to certain position, liquid-level switch 31 locking fluid level control valves 30 were in closed condition, thereby obtain highly purified vapour phase heat carrier space.Open the flow process of heat(ing) coil 4 this moment again, make the process fluid heat(ing) coil 4 of flowing through, and then make the vapour phase heat carrier latent heat be passed to process fluid by heat(ing) coil 4, the vapour phase heat carrier that discharges latent heat undergoes phase transition, condense into the liquid level that falls back behind the drop, carry out post bake, so move in circles, realize continuous heat process fluid.
In the present embodiment,, make vapor phase space pressure to set, and this pressure can be in a certain barotropic state, have characteristics such as working pressure range is wide by means of the fluid-tight effect of high-order liquid case 32 and the control vapor phase space pressure effect of pressure sensor 35.
In sum, the operation principle of the high vacuum heating furnace in the utility model is by means of control device control burner 2 combustion fuels (oil or gas), make fuel in fire tube 20 internal combustion, the high-temperature flue gas that burning produces flows through smoke pipe 21 through fire tube 20, discharge by chimney 22 again, then pass to the liquid phase heat carrier 8 of body of heater 1 inside by fire tube 20 and smoke pipe 21 by the mode of radiation and convection current because of the heat of burning generation, this liquid phase heat carrier is vaporized gradually in heating process and is generated the vapour phase heat carrier, forms required vapor phase space.After forming vapor phase space, open the flow process of heat(ing) coil 4, make the process fluid heat(ing) coil 4 of flowing through, because heat(ing) coil 4 is arranged in the vapour phase heat carrier, thereby make the vapour phase heat carrier latent heat be passed to the process fluid of the heat(ing) coil 4 of flowing through by heat(ing) coil 4, the heat that is about to the burning generation is passed to process fluid indirectly, realizes the purpose of indirect.And the vapour phase heat carrier behind the release latent heat undergoes phase transition, and condenses into behind the drop by the gravity liquid level that falls back, carries out post bake, so moves in circles, and realizes the purpose of continuous heat process fluid.
This shows that the high vacuum heating furnace in the utility model has following advantage:
1. can form high-purity vapour phase heating space fast and efficiently in body of heater, the vapour phase heat carrier of this vapor phase space is directly generated in heating process by the liquid phase heat carrier, and purity is almost 100%, really realizes the purpose of the efficient phase-change heat-exchange of heat carrier.
2. can obtain the outer heat transfer coefficient of very high heat(ing) coil pipe, thereby greatly reduce the heat exchange area of heat(ing) coil, reduce the volume of body of heater, save manufacturing cost, reduce to take up an area of the space.
3. can select the different structure of body of heater according to the watt level of heating furnace.
4. vapour phase heat carrier and liquid phase heat carrier are in the space of a sealing, make heat carrier seldom lose after disposable injection, seldom need to replenish.
In addition; above-mentionedly only two preferred embodiments in the utility model are described; but can not be as protection domain of the present utility model; because of as those skilled in the art it being made corresponding modification and modification is fine; as the vapour phase adjusting device with pressure sensor 35 can be set on the heating furnace of integral type body of heater; conversely; can be provided with on the heating furnace of separate assembling body of heater does not have the vapour phase of pressure sensor adjusting device yet; therefore; the equivalence that designs spirit and make of the present utility model of every foundation changes or modifies, and all should think to fall into protection domain of the present utility model.
Claims (10)
1. high vacuum heating furnace, it is characterized in that: it mainly includes body of heater, burner, control device, heat absorption transmitting device and vapour phase adjusting device, wherein:
Described body of heater is housing sealing, that be used to hold heat carrier, is provided with the safety valve that is used to inject the liquid-filling valve of heat carrier and guarantees security of operation at the top of this housing;
Described burner includes fire tube and the smoke pipe that is located at the inner bottom side of body of heater, be located at chimney, burner, fuel supply pipe road and the igniter of described body of heater outside, fuel supply pipe road, burner, fire tube, smoke pipe and chimney fuse, and are in the junction and are tightly connected;
Described heat absorption transmitting device comprises at least one group of heat(ing) coil that is arranged on the inner top side of body of heater, is used for the indirect process fluid, and input, the output of this heat(ing) coil all extend outside the body of heater, and are connected with the conveyance conduit of process fluid;
Described vapour phase adjusting device is located at the outside of body of heater, this vapour phase adjusting device includes fluid level control valve, liquid-level switch and high-order liquid case, wherein, the highest liquid level face in the high-order liquid case is higher than the end face of described body of heater, this high position liquid case is connected with the bottom of described body of heater by pipeline, fluid level control valve, and described fluid level control valve is connected with the liquid-level switch signal of telecommunication.
2. according to the high vacuum heating furnace described in the claim 1, it is characterized in that: described body of heater is an integral structure.
3. according to the high vacuum heating furnace described in the claim 1, it is characterized in that: described body of heater is a split-type structural, and it includes upper furnace body and lower furnace body, and upper furnace body and lower furnace body are tightly connected by connector in the junction.
4. according to the high vacuum heating furnace described in claim 2 or 3, it is characterized in that: described high-order liquid case is provided with an overfall that is connected with outside other storage facilities at its top.
5. according to the high vacuum heating furnace described in the claim 2, it is characterized in that: described high-order liquid case directly is fixedly set in the top of described body of heater.
6. according to the high vacuum heating furnace described in the claim 3, it is characterized in that: described high-order liquid case directly is fixedly set in the side of upper furnace body, and the highest liquid level of described high-order liquid case is higher than the end face of upper furnace body.
7. according to any described high vacuum heating furnace in the claim 1 to 3, it is characterized in that: described heat carrier is the hydrate or the conduction oil of water, alcohols, alcohols.
8. according to any described high vacuum heating furnace in the claim 1 to 3, it is characterized in that: described smoke pipe and heat(ing) coil are common light pipe or fin high-efficiency heat pipe.
9. according to any described high vacuum heating furnace in the claim 1 to 3, it is characterized in that: described body of heater has heat-insulation layer in its arranged outside, and galvanized iron sheet, aluminium skin or stainless steel sheet| protective layer are set outside heat-insulation layer.
10. according to any described high vacuum heating furnace in the claim 1 to 3, it is characterized in that: described vapour phase adjusting device also includes a pressure sensor that is used to measure the inner vapor phase space pressure of described body of heater, and this pressure sensor is connected with the described fluid level control valve signal of telecommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03266059 CN2646620Y (en) | 2003-06-25 | 2003-06-25 | High vacuum heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03266059 CN2646620Y (en) | 2003-06-25 | 2003-06-25 | High vacuum heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2646620Y true CN2646620Y (en) | 2004-10-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03266059 Expired - Lifetime CN2646620Y (en) | 2003-06-25 | 2003-06-25 | High vacuum heating furnace |
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| Country | Link |
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| CN (1) | CN2646620Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338467A (en) * | 2011-10-24 | 2012-02-01 | 北京百恒达石油技术有限公司 | Constant pressure gas transmission pipeline heating furnace |
| CN104374085A (en) * | 2014-10-17 | 2015-02-25 | 中国石油大学(华东) | Fire tube heating furnace |
| CN106403287A (en) * | 2016-08-31 | 2017-02-15 | 李福军 | Efficient, energy-saving and ultra-fast maintaining and cleaning heating furnace for oil field |
| CN106440788A (en) * | 2016-08-31 | 2017-02-22 | 安邦电气股份有限公司 | Phase change vacuum electric heating furnace |
| CN108561878A (en) * | 2018-03-20 | 2018-09-21 | 张家庆 | A kind of hot precious and oxyhydrogen combustion technology of water cycle pyrolysis oxyhydrogen combustion |
-
2003
- 2003-06-25 CN CN 03266059 patent/CN2646620Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338467A (en) * | 2011-10-24 | 2012-02-01 | 北京百恒达石油技术有限公司 | Constant pressure gas transmission pipeline heating furnace |
| CN104374085A (en) * | 2014-10-17 | 2015-02-25 | 中国石油大学(华东) | Fire tube heating furnace |
| CN106403287A (en) * | 2016-08-31 | 2017-02-15 | 李福军 | Efficient, energy-saving and ultra-fast maintaining and cleaning heating furnace for oil field |
| CN106440788A (en) * | 2016-08-31 | 2017-02-22 | 安邦电气股份有限公司 | Phase change vacuum electric heating furnace |
| CN108561878A (en) * | 2018-03-20 | 2018-09-21 | 张家庆 | A kind of hot precious and oxyhydrogen combustion technology of water cycle pyrolysis oxyhydrogen combustion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: HAO ZUOXIN Effective date: 20041126 Owner name: BIHAIZHOU (BEIJING) PETROLEUM & CHEMICAL EQUIPMEN Free format text: FORMER OWNER: WANG GANG |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20041126 Address after: 100013 Beijing city Chaoyang District Heping Street north of Beijing Research Institute of chemical industry in Patentee after: BSS (Beijing) Petro-Chemical Equipment Co., Ltd. Address before: 257019 Shandong Province, Dongying city Dongying District No. 1 Chunlu Hao Co-patentee before: Hao Zuoxin Patentee before: Wang Gang |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130625 Granted publication date: 20041006 |