Shale dry distillation deslagging basin sealing structure

Abstract

The utility model discloses a shale dry distillation deslagging basin closing structure, which belongs to the technical field of shale dry distillation, and comprises a plurality of dry distillation furnace bodies, the top of each dry distillation furnace body is provided with a closed basin cast iron plate mechanism, and an upper trough closing mechanism is arranged between every two dry distillation furnace bodies. According to the utility model, the closed basin cast iron plate mechanism and the upper trough closing mechanism are used for closing the gas generated by the operation of the smooth dry distillation furnace in a limited space, and then the gas is guided back to a process system through the gas guide-out pipe for cyclic utilization, so that the problem of water evaporation in the basin can be solved; even if the pressure in the dry distillation furnace is too large and the basin generates a water sputtering phenomenon, the sputtered water can be blocked by the closed structure, so that the safety of post operation workers is ensured, and the practicability of the closed structure of the shale dry distillation deslagging basin is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shale dry distillation, and more specifically to a shale dry distillation slag water basin closed structure. Background Art

[0002] With the rapid development of oil shale distillation technology, it is of utmost importance to improve the automation, intelligence and environmental protection of distillation process. Fushun type distillation furnace is a vertical cylindrical distillation furnace that connects oil shale distillation and shale semi-coke gasification process. Fushun type distillation furnace consists of three parts: charging equipment, furnace body and ash discharge equipment. The ash discharge basin of the ash discharge part is assembled by six cast iron plates, which contain a certain height of water. During the ash discharge process, the high-temperature ash slag contacts with the water in the ash discharge basin, which will produce a large amount of water vapor and H2S, N X O mixed gas, in the past these mixed gases were not treated and directly discharged into the atmosphere, causing environmental pollution and failing to meet environmental protection standards. Its "whirring gas" image also affects the promotion of the distillation process. In addition, during the ash discharge process, the high-temperature ash comes into contact with the water in the ash discharge basin. If the pressure in the distillation furnace is too high in a short period of time, the water in the basin will boil and splash out. If the workers on the job inspect around, there will be safety hazards. In winter, due to the cold weather, the basin will produce a lot of water vapor. When the workers on the job are operating, they often cannot see the on-site situation clearly, affecting their normal work. For this reason, we propose a shale distillation slag basin closed structure. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model aims to provide a shale dry distillation slag water basin sealing structure.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A shale dry distillation slag basin closed structure comprises a plurality of dry distillation furnace bodies, a closed water basin cast iron plate mechanism is arranged on the top of the dry distillation furnace body, an upper trough closed mechanism is arranged between two of the dry distillation furnace bodies, the upper trough closed mechanism comprises a trough closed door, a third supporting angle steel, a gas outlet pipe and a trough closed upper cover plate, the third supporting angle steel is arranged on the top of the trough closed door, the trough closed upper cover plate is arranged on the third supporting angle steel, and the gas outlet pipe is welded to the top surface of the trough closed upper cover plate.

[0006] As a preferred embodiment of the present utility model, the closed water basin cast iron plate mechanism includes twenty-eight cast iron plate bodies, and the twenty-eight cast iron plate bodies are divided into Class I cast iron plates, Class II cast iron plates, Class III cast iron plates, and Class IV cast iron plates. A first angle steel support is fixedly connected to the distillation furnace body, an intermediate connecting plate is fixedly connected to the first angle steel support, a cast iron plate fixing plate is fixedly connected to the intermediate connecting plate and the distillation furnace body, a second angle steel support is fixedly connected to the cast iron plate fixing plate, a fixing pin is sleeved on the cast iron plate fixing plate, and a connecting pin is arranged between the two cast iron plate bodies.

[0007] As a preferred solution of the utility model, the type I cast iron plate, type II cast iron plate, type III cast iron plate, and type IV cast iron plate can be interchangeable with each other.

[0008] As a preferred solution of the utility model, the two cast iron plates are connected by stainless steel bolts, and an asbestos rope is arranged between the two cast iron plates.

[0009] As a preferred solution of the utility model, a pressure plate door is provided on the cast iron plate body.

[0010] As a preferred solution of the utility model, a sealing asbestos pad is arranged between the second angle steel support and the cast iron plate body.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] The utility model discloses sealing the gas produced by the operation of the Fushun type retort furnace in a limited space by means of a closed water basin cast iron plate mechanism and an upper material trough sealing mechanism, and then leads the gas back to the process system through a gas outlet pipe for recycling, so as to solve the problem of water evaporation in the water basin. In addition, after the retort furnace slag discharge water basin is sealed by this structure, even if the internal pressure of the retort furnace is too great to cause water splashing in the water basin, the splashed water will be blocked by the sealing structure, so as to ensure the safety of the operators at the post and improve the practicability of the shale retort slag discharge water basin sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front structural diagram of the cast iron plate mechanism of the closed water basin of the utility model;

[0014] Figure 2 It is a schematic diagram of the top view of the cast iron plate of the closed water basin of the utility model;

[0015] Figure 3 For this utility model Figure 2 A is an enlarged schematic diagram;

[0016] Figure 4 It is a schematic diagram of the connection between the dry distillation furnace body and the first angle steel support of the utility model;

[0017] Figure 5 This is a front structural schematic diagram of the upper trough closing mechanism of the utility model;

[0018] Figure 6 It is a cross-sectional schematic diagram of the upper trough closing mechanism of the utility model;

[0019] Figure 7 It is a top view schematic diagram of the upper trough closing mechanism of the utility model;

[0020] Figure 8 For this utility model Figure 6 The enlarged schematic diagram of point B in FIG.

[0021] Fig. 9 It is a connection schematic diagram of the cast iron plate mechanism of the closed water basin of the utility model.

[0022] Description of the numbers in the figure:

[0023] 1. Retort furnace body; 2. First angle steel support; 3. Middle connecting plate; 4. Cast iron plate fixing plate; 5. Second angle steel support; 6. Fixed pin shaft; 7. Cast iron plate body; 8. Sealing asbestos pad; 9. Connecting pin; 10. Pressing plate door; 11. Material trough closing door; 12. Third supporting angle steel; 13. Gas outlet pipe; 14. Material trough closing upper cover plate. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Example:

[0028] See also Figure 1-9 A shale dry distillation slag basin closed structure comprises a plurality of dry distillation furnace bodies 1, a closed water basin cast iron plate mechanism is arranged on the top of the dry distillation furnace body 1, an upper trough closed mechanism is arranged between the two dry distillation furnace bodies 1, the upper trough closed mechanism comprises a trough closed door 11, a third supporting angle steel 12, a gas outlet pipe 13 and a trough closed upper cover plate 14, the third supporting angle steel 12 is arranged on the top of the trough closed door 11, the trough closed upper cover plate 14 is arranged on the third supporting angle steel 12, and the gas outlet pipe 13 is welded to the top surface of the trough closed upper cover plate 14.

[0029] In this embodiment, the upper material trough sealing mechanism is located between the two retort furnace bodies 1 to ensure the service life of the sealing structure under the corrosion of the mixed gas. The overall sealing structure is supported by an angle steel frame, and the load-bearing points are located on the retort furnace bodies 1 on both sides and the lower material trough. The remaining parts are sealed with stainless steel plates. The sealing structure is an arc-shaped structure that fits the water basin and the material trough of the retort furnace. According to the principles of ergonomics, an inspection hole is set at a height of 1.2 meters from the ground to facilitate maintenance and normal job operations by post personnel. The upper structure is divided into three parts, of which the two sides are fixed sealing plates and the middle is a detachable sealing plate. The gas outlet pipe 13 is led out from one side of the two side sealing plates according to the on-site conditions.

[0030] For details, please refer to Figures 1 to 4 The closed water basin cast iron plate mechanism includes twenty-eight cast iron plate bodies 7, which are divided into Class I cast iron plates, Class II cast iron plates, Class III cast iron plates, and Class IV cast iron plates. A first angle steel support 2 is fixedly connected to the retort furnace body 1, an intermediate connecting plate 3 is fixedly connected to the first angle steel support 2, a cast iron plate fixing plate 4 is fixedly connected to the intermediate connecting plate 3 and the retort furnace body 1, a second angle steel support 5 is fixedly connected to the cast iron plate fixing plate 4, a fixing pin 6 is sleeved on the cast iron plate fixing plate 4, and a connecting pin 9 is arranged between the two cast iron plate bodies 7.

[0031] In this embodiment, the weight of each cast iron plate body 7 is 15 kg, the first angle steel support 2 is welded to the retort furnace body 1, the middle connecting plate 3 is welded to the first angle steel support 2, the cast iron plate fixing plate 4 is welded to the middle connecting plate 3 and the retort furnace body 1, the second angle steel support 5 is welded to the middle connecting plate 3, the fixing pin 6 passes through the cast iron plate fixing plate 4 and the fixing pin 6 to connect the two single pieces, and the connecting pin 9 is used to connect the two adjacent cast iron plate bodies 7. In order to facilitate disassembly and assembly, the closed water basin cast iron plate mechanism is decomposed into many small structures with very light weight. The material of the cast iron plate is similar to that of the retort furnace and the water basin, and the overall appearance is relatively beautiful. The cast iron plate is wear-resistant, corrosion-resistant, and has a long service life. Through actual tracking observation, it is found that the service life of the closed structure of the cast iron plate is stainless. Although the mechanical strength of the cast iron plate is the worst, the entire closed structure is not impacted by external force, so the mechanical strength of the cast iron plate can fully meet the overall design requirements.

[0032] For details, please refer to Figure 1 and Figure 2 , Class I cast iron plates, Class II cast iron plates, Class III cast iron plates, and Class IV cast iron plates can be interchanged with each other of the same type.

[0033] In this embodiment, the type I cast iron plate acts as a material baffle plate, the type II cast iron plate is an ordinary connecting cast iron plate, the type III cast iron plate is provided with an observation hole, and the type IV cast iron plate is provided with a water adding hole.

[0034] For details, please refer to Figures 1 to 4 The two cast iron plates 7 are connected by stainless steel bolts, and an asbestos rope is arranged between the two cast iron plates 7.

[0035] In this embodiment, the cast iron plates 7 are connected by stainless steel bolts, and three bolt holes are provided at the connection. The distance between every two bolt holes is not greater than 10 times the bolt diameter. Asbestos rope is used as a sealing filler in the connection gap to ensure the sealing effect after tightening the bolts.

[0036] For details, please refer to Figure 4 A pressure plate door 10 is arranged on the cast iron plate body 7.

[0037] In this embodiment, the pressure plate door 10 is used to seal the observation hole on the Class III cast iron plate.

[0038] For details, please refer to Figure 4 A sealing asbestos pad 8 is arranged between the second angle steel support 5 and the cast iron plate body 7.

[0039] In this embodiment, the sealing asbestos pad 8 is located between the second angle steel support 5 and the cast iron plate body 7 to play a sealing role.

[0040] Working principle: Fushun retort furnace process adopts group furnace control, 20 retort furnaces form one unit. Since the ash discharge basin is an open structure, natural evaporation will occur during the ash discharge process. Under normal circumstances, the water replenishment of one retort furnace is 23t / day, and the water replenishment part is composed of waste slag water, internal evaporation water, and external evaporation water. According to the material balance estimation in the furnace, the ash produced by a single furnace is 78t / h. After contacting with the water in the basin, the shale ash will take away a certain amount of water. After calculation, the water content of the waste slag is 14%, and the internal evaporation water is 5 times the external evaporation water. It is calculated that the total water replenishment of the retort furnace is 23 tons per hour, the waste slag carries 10.92 tons of water per hour, the internal evaporation water is 2.01 tons per hour, and the external evaporation water is 10.07 tons per hour:

[0041] The overall project plan is considered in three steps. The first step is to calculate the air volume in the enclosed space and select the fan through pipeline layout; the second step is to design the enclosed structure. The design needs to consider not affecting the normal operation of workers on the job, and after the design is completed, it must conform to ergonomic principles and be easy to disassemble and assemble; the third step is to select suitable enclosed materials to extend the service life as much as possible while ensuring its reasonable mechanical strength.

[0042] The Fushun retort furnace process consists of 20 retort furnaces, each of which has a slag water basin under it. Gas collecting hoods are set on both sides of the basin to lead out the scattered exhaust gas. The led-out gas is then collected in the main pipe for unified treatment.

[0043] The main dispersed exhaust gas at the 6 o'clock and 12 o'clock positions of the closed water basin cast iron plate mechanism is water vapor, and the main dispersed exhaust gas at the 3 o'clock and 9 o'clock positions is water vapor, H2S, and NOX. These gases are mixed in the middle of the two closed water basin cast iron plate mechanisms, and finally discharged from the gas outlet pipe 13. A control valve is set on the gas outlet pipe 13 to facilitate the control of gas flow. The pipeline collects water vapor through the closed cover, and then is extracted into the main pipeline by the negative pressure of the fan, and finally introduced into the fan;

[0044] After the installation of this sealing structure, it can prevent the boiling and splashing of water in the basin due to excessive pressure and temperature in the furnace, causing burns to people. It can also inhibit the evaporation of water. It is estimated that after the closed structure modification is completed, 4,000 tons of water in the basin can be saved each year. At the same time, 20,000 tons of mixed gas containing H2S and NXO can be collected and treated annually.

[0045] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A shale dry distillation slag basin closed structure, comprising a plurality of dry distillation furnace bodies (1), characterized in that: A closed water basin cast iron plate mechanism is arranged on the top of the dry distillation furnace body (1); an upper trough closing mechanism is arranged between the two dry distillation furnace bodies (1); the upper trough closing mechanism comprises a trough closing door (11), a third supporting angle steel (12), a gas outlet pipe (13) and a trough closing upper cover plate (14); the third supporting angle steel (12) is arranged on the top of the trough closing door (11); the trough closing upper cover plate (14) is arranged on the third supporting angle steel (12); and the gas outlet pipe (13) is welded to the top surface of the trough closing upper cover plate (14).

2. A shale dry distillation slag basin closed structure according to claim 1, characterized in that: The closed water basin cast iron plate mechanism comprises twenty-eight cast iron plate bodies (7), the twenty-eight cast iron plate bodies (7) are divided into Class I cast iron plates, Class II cast iron plates, Class III cast iron plates, and Class IV cast iron plates. A first angle steel support (2) is fixedly connected to the retort furnace body (1), an intermediate connecting plate (3) is fixedly connected to the first angle steel support (2), a cast iron plate fixing plate (4) is fixedly connected to the intermediate connecting plate (3) and the retort furnace body (1), a second angle steel support (5) is fixedly connected to the cast iron plate fixing plate (4), a fixing pin shaft (6) is sleeved on the cast iron plate fixing plate (4), and a connecting pin (9) is arranged between the two cast iron plate bodies (7).

3. A shale dry distillation slag basin closed structure according to claim 2, characterized in that: The type I cast iron plates, type II cast iron plates, type III cast iron plates and type IV cast iron plates can be interchangeable with each other.

4. A shale dry distillation slag basin closed structure according to claim 2, characterized in that: The two cast iron plates (7) are connected by stainless steel bolts, and an asbestos rope is arranged between the two cast iron plates (7).

5. A shale dry distillation slag basin closed structure according to claim 2, characterized in that: A pressure plate door (10) is provided on the cast iron plate body (7).

6. A shale dry distillation slag basin closed structure according to claim 2, characterized in that: A sealing asbestos pad (8) is provided between the second angle steel support (5) and the cast iron plate body (7).

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