Cyclone system of coal catalytic gasification gas production process

Abstract

The utility model relates to a cyclone separation system for a coal catalytic gasification gas production process. The cyclone separation system comprises a gasification furnace, a primary cyclone separator, a secondary cyclone separator, a high-pressure slag hopper, a variable-pressure slag hopper, a first-rotation high-pressure ash hopper, a first-rotation variable-pressure ash hopper, a second-rotation high-pressure ash hopper, a second-rotation variable-pressure ash hopper and a special flexible element. The temperature change within the range of hundreds of degrees centigrade can be generated in the route from the cyclone separator to the high-pressure ash hopper and even the variable-pressure ash hopper, the high thermal stress level in the system is effectively reduced by the special flexible element, a high-risk stress concentration area caused by the high-amplitude thermal displacement of the system to a pipeline system and an equipment system is effectively dealt with, the safety risk is greatly avoided, and the service life of the system is prolonged. In addition, one-time construction investment cost of the device is saved, and safety, reliability and stability of system operation of the device are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of coal chemical industry, and in particular relates to a cyclone system of a coal catalytic gasification gasification process. Background Art

[0002] Catalytic gasification of coal is an advanced third-generation gasification technology, an important way to utilize coal cleanly and efficiently, and one of the most effective processes for coal-to-natural gas. After the coal participates in the catalytic gasification reaction in the gasifier, the coal gas at the top of the furnace enters the primary cyclone separator, and the separated raw coal gas enters the secondary cyclone separator. The solids separated by the primary cyclone separator and the secondary cyclone separator are discharged to the high-pressure ash hopper, and then discharged to the ground for collection through the variable pressure ash hopper (this system is called a cyclone system).

[0003] When the coal gas enters the cyclone separator, the coal gas temperature is between 700 and 800 °C, and the temperature change in the range of 800 to 300 °C will occur in the route from the cyclone separator to the high-pressure ash hopper and even the transformer ash hopper. The problem caused by this is that under such high temperature conditions, the connecting pipes between the various equipment will produce very high thermal stress, and the thermal expansion of the pipes and equipment themselves will be converted into thermal displacement. Studies have shown that when the coal processing capacity of the catalytic gasification unit is 300t / a, the vertical thermal displacement of the cyclone system can reach 70 to 110mm. Such a high amplitude thermal displacement will cause great challenges to the stress concentration areas of the pipeline system and equipment system, such as leakage risk, pipeline explosion risk, and even equipment damage or casualties. At present, there are empirical reference methods, formula methods, etc. to solve the high temperature and high stress of the high-temperature cyclone system, but the application effect is general and the efficiency is low. Considering the gas-solid two-phase fluid properties of the medium in the cyclone system, the pipeline system should not be bent or arranged horizontally, but should be arranged vertically, and it is not advisable to set pipeline supports and hangers, which puts higher requirements on the methods and approaches to improve the stress level of the cyclone system. Utility Model Content

[0004] The purpose of the utility model is to provide a cyclone system for coal catalytic gasification gasification process, which uses special flexible elements to flexibly decompose the cyclone system composed of a gasifier, a primary cyclone separator, a secondary cyclone separator, a high-pressure slag hopper, a pressure-variable slag hopper, a first cyclone high-pressure ash hopper, a first cyclone pressure-variable ash hopper, a second cyclone high-pressure ash hopper, and a second cyclone pressure-variable ash hopper, and reduce the stress level of the entire system. By using analytical design criteria and combining stress analysis calculation procedures, the thermal stress conditions of the high-temperature cyclone system are comprehensively considered to accurately and efficiently obtain a reliable thermal stress level of the system; special flexible elements that effectively reduce the high thermal stress level in the system. It effectively responds to the high-risk stress concentration areas caused by the high-amplitude thermal displacement of the system to the pipeline system and equipment system, and greatly avoids safety risks. The flexible device of the cyclone system saves the one-time construction investment cost of the device and ensures the safety, reliability and stability of the device system operation.

[0005] The utility model is realized by the following technical solutions:

[0006] In the first aspect, the utility model provides a flexible device for a cyclone system of a coal catalytic gasification gasification process, the device comprising: a gasifier, a primary cyclone separator, a secondary cyclone separator, a high-pressure slag hopper, a variable-pressure slag hopper, a first-cyclone high-pressure ash hopper, a first-cyclone variable-pressure ash hopper, a second-cyclone high-pressure ash hopper, a second-cyclone variable-pressure ash hopper and a special flexible element, the top outlet of the gasifier is connected to the primary cyclone separator, the top outlet of the primary cyclone separator is connected to the secondary cyclone separator; the high-pressure slag hopper and the variable-pressure slag hopper are connected in series at the bottom of the gasifier; the lower part of the primary cyclone separator is connected in series with the A first-rotation high-pressure ash hopper and a first-rotation pressure-transformer ash hopper; a second-rotation high-pressure ash hopper and a second-rotation pressure-transformer ash hopper are connected in series at the lower part of the secondary cyclone separator; the high-pressure slag hopper, the first-rotation pressure-transformer ash hopper, and the second-rotation pressure-transformer ash hopper are all provided with special flexible elements, which are composed of multiple disc springs, hinged elements arranged on the disc springs, and forming rods connecting the hinged elements of different disc springs; the tops of the multiple disc springs are connected to the bottoms or lower parts of the high-pressure slag hopper, the first-rotation pressure-transformer ash hopper, and the second-rotation pressure-transformer ash hopper, and the bottom surfaces of the disc springs are fixedly connected to the foundation or base.

[0007] Preferably, in the above system, a pulverized coal feeding device is provided at the upper part of the gasifier, and a heat source heating system is provided at the lower part.

[0008] Preferably, in the above system, multiple disc springs are distributed at multiple corners of the bottom of the high-pressure slag hopper, the first rotary transformer ash hopper, and the second rotary transformer ash hopper, and the top surface of the disc springs is connected and fixed to the lower edge surface of the support ears of the high-pressure slag hopper, the first rotary transformer ash hopper, and the second rotary transformer ash hopper.

[0009] Preferably, in the above system, the top surface of the disc spring is bolted to the lower edge surface of the support ears of the high-pressure slag hopper, the first rotary transformer ash hopper, and the second rotary transformer ash hopper, and the disc spring top surface connecting plate of the special flexible element and the lower bottom plate of the equipment support ears are provided with bolt holes, and the number of holes corresponds, and they are connected and fixed with bolts, nuts and washers.

[0010] Preferably, in the above system, a hinge element is respectively provided at the upper part and the lower part of the disc spring, and the two hinge elements of each disc spring are respectively connected to the hinge elements of the other two disc springs through the shaping rods.

[0011] Preferably, in the above system, the hinge elements are respectively arranged at 1 / 5~2 / 5 height and 3 / 5~4 / 5 height of the disc spring, preferably at the upper 1 / 3 and lower 1 / 3, the hinge element and the disc spring are connected by surface welding, and the forming rod is embedded in the hinge element.

[0012] Preferably, in the above system, 1) the synthetic bending stress is calculated according to the following formula:

[0013] (Formula 1)

[0014] In formula 1:

[0015] S b ——Compound bending stress; Pa

[0016] i i ——in-plane stress intensification factor;

[0017] i o ——out-of-plane stress intensification factor;

[0018] M i ——Bending moment in the plane; N·m

[0019] M o ——Bending moment out of plane; N·m

[0020] Z——section modulus of the pipe;

[0021] i i 、i o 、M i 、M o , the value of Z is selected according to ASME B31.3 standard;

[0022] 2) According to the value of the synthetic bending stress, select the disc spring with specific nominal load value and nominal displacement value.

[0023] Preferably, in the above system, a balance line is provided between the high-pressure slag hopper and the transformer slag hopper, between the first-rotor high-pressure ash hopper and the first-rotor transformer ash hopper, and between the second-rotor high-pressure ash hopper and the second-rotor transformer ash hopper.

[0024] In a second aspect, the utility model provides a coal catalytic gasification gasification process, which uses the above system and includes the following steps:

[0025] The raw coal powder is quantitatively fed into the gasifier through the feeding device (the gasification furnace gas output is 300~700Nm 3 / h, coal powder processing capacity 1~3 tons / day), its working temperature is 650℃~810℃, pressure is 3.6MPa~4.2MPa. The gasifier (1) outlet gas enters the primary cyclone separator, its working temperature is 680℃~750℃, pressure is 3.6MPa~4.2MPa, the separated raw coal gas enters the secondary cyclone separator, its working temperature is 680℃~750℃, pressure is 3.6MPa~4.2MPa, the solid separated by the primary cyclone separator and the secondary cyclone separator is discharged to the first cyclone high pressure ash hopper and the second cyclone high pressure ash hopper respectively, its working temperature is 280℃~360℃, pressure is 3.6MPa~4.2MPa, and then passes through the first cyclone variable pressure ash hopper and the second cyclone variable pressure ash hopper, its working temperature is 280℃~360℃, pressure is 3.6MPa~4.2MPa, and then discharged to the outside.

[0026] The gasification furnace adopts dry slag discharge, which passes through high-pressure slag hopper and variable-pressure slag hopper with an operating temperature of 460℃~550℃ and a pressure of 3.6MPa~4.2MPa, and then is discharged and collected externally.

[0027] In the above process, the high-pressure slag hopper, the first-rotation transformer ash hopper, and the second-rotation transformer ash hopper are equipped with special flexible elements, which can transfer the load and thrust acting on the pipe support to the equipment body with higher strength, greatly improving the system's stress conditions.

[0028] In the above process, the special flexible element eliminates the necessity of setting up pipe supports and hangers under special working conditions, and is more adaptable to similar rotary systems that cannot use conventional pipe support and hanger optimization methods to reduce system stress levels.

[0029] In the above process, the special flexible element adopts a disc spring support bracket whose bearing capacity does not change with the change of vertical displacement at the support point when it bears the deadweight load of equipment and pipelines, that is, the load remains constant.

[0030] In the above process, the analysis and design criteria are used in combination with the stress analysis calculation program to comprehensively consider the thermal stress conditions of the high-temperature cyclone system, and accurately and efficiently obtain the reliable thermal stress level of the system; the utility model effectively reduces the special flexible components with high thermal stress levels in the system. It effectively responds to the high-risk stress concentration areas caused by the high-amplitude thermal displacement of the system to the pipeline system and equipment system, and greatly avoids safety risks. The flexible device of the cyclone system saves the one-time construction investment cost of the device and ensures the safety, reliability and stability of the operation of the device system.

[0031] The technical solution of the utility model has the following advantages:

[0032] (1) The utility model proposes a method for optimizing the high thermal stress level of pipelines, that is, adding special flexible elements to the rigid support points of conventional equipment, thereby transferring the load and thrust acting on the pipeline support to the equipment body with higher strength, greatly improving the stress conditions of the system;

[0033] (2) The special flexible element of the utility model eliminates the necessity of setting up pipe supports and hangers under special working conditions, and is more adaptable to similar rotary systems that cannot use conventional pipe support and hanger optimization methods to reduce system stress levels;

[0034] (3) The device of the utility model effectively reduces the high thermal stress level in the system with special flexible components. It effectively responds to the high-risk stress concentration areas caused by the high-amplitude thermal displacement of the system on the pipeline system and equipment system, greatly avoiding safety risks. The flexible device of the rotary system saves the initial construction investment cost of the device and ensures the safety, reliability and stability of the device system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram of a flexible device of a cyclone system of a coal catalytic gasification gasification process according to Example 1 of the utility model, wherein:

[0037] 1—gasifier, 2—first-stage cyclone separator, 3—second-stage cyclone separator, 4—high-pressure slag hopper, 5—variable-pressure slag hopper, 6—single-cyclone high-pressure ash hopper, 7—single-cyclone variable-pressure ash hopper, 8—second-cyclone high-pressure ash hopper, 9—second-cyclone variable-pressure ash hopper, 10—special flexible element, 11—balance line;

[0038] Figure 2 It is a schematic diagram of a characteristic flexible element in a flexible device of a cyclonic separation system of a coal catalytic gasification gasification process according to Example 1 of the utility model, wherein: 12 is a disc spring, 13 is a hinge element, and 14 is a shaping rod;

[0039] Figure 3 It is a schematic diagram of disc spring;

[0040] Figure 4 This is a typical load-displacement characteristic curve of a disc spring. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings.

[0042] like Figure 1As shown, the cyclone system of the coal catalytic gasification gasification process of the utility model includes a gasifier 1, a primary cyclone separator 2, a secondary cyclone separator 3, a high-pressure slag hopper 4, a variable-pressure slag hopper 5, a first-cyclone high-pressure ash hopper 6, a first-cyclone variable-pressure ash hopper 7, a second-cyclone high-pressure ash hopper 8, a second-cyclone variable-pressure ash hopper 9 and a special flexible element 10. Except for the special flexible element 10, the other equipment are all existing molding equipment.

[0043] like Figure 2 As shown, the flexible device characteristic flexible element of the cyclone system of the coal catalytic gasification gasification process of the utility model includes a disc spring 12, an articulated element 13, and a shaping rod 14.

[0044] A pulverized coal feeding device is provided at the upper part of the gasifier 1, and an electric heating furnace is provided at the lower part to provide a heat source therefor.

[0045] The top outlet of the gasifier 1 is connected to the first-stage cyclone separator 2, and the top outlet of the first-stage cyclone separator 2 is connected to the second-stage cyclone separator 3; a high-pressure slag hopper 4 and a pressure-variable slag hopper 5 are connected in series at the lower part of the gasifier 1; a first-cyclone high-pressure ash hopper 6 and a first-cyclone pressure-variable ash hopper 7 are connected in series at the lower part of the first-stage cyclone separator 2; a second-cyclone high-pressure ash hopper 8 and a second-cyclone pressure-variable ash hopper 9 are connected in series at the lower part of the second-stage cyclone separator 3.

[0046] The high-pressure slag bucket 4, the first rotary transformer ash bucket 7, and the second rotary transformer ash bucket 9 are all provided with a special flexible element 10, which is composed of a plurality of disc springs 12, a hinge element 13 provided on the disc springs, and a forming rod 14 connecting the hinge elements of different disc springs. The tops of the plurality of disc springs 12 are connected to the bottom or lower part of the high-pressure slag bucket 4, the first rotary transformer ash bucket 7, and the second rotary transformer ash bucket 9. Preferably, multiple disc springs 12 are evenly distributed at multiple corners of the bottom of the high-pressure slag bucket 4, the first rotary transformer ash bucket 7, and the second rotary transformer ash bucket 9, such as three or four corners of the bottom, and the top surface of the disc spring 12 is connected and fixed to the lower edge surface of the support ears of the high-pressure slag bucket 4, the first rotary transformer ash bucket 7, and the second rotary transformer ash bucket 9; the specific connection type can be the simplest bolt connection, that is, the top surface connection plate of the disc spring 12 of the special flexible element 10 and the bottom plate under the equipment support ear are provided with bolt holes, and the number of holes corresponds, and they are connected and fixed with bolts, nuts, and washers. The bottom surface of the disc spring 12 is fixedly connected to the foundation or base. A hinge element is respectively arranged at the upper and lower parts of the disc spring, and three disc springs can be evenly arranged at the bottom of the high-pressure slag bucket 4, the first rotary transformer ash bucket 7, and the second rotary transformer ash bucket 9 (three corners of the bottom, the connection line between the three disc springs is preferably an equilateral triangle), and the two hinge elements of each disc spring are respectively connected to the hinge elements of the other two disc springs through the shaping rod. For example, the hinge element 13 can be respectively arranged at the 1 / 5~2 / 5 height and 3 / 5~4 / 5 height of the disc spring 12, preferably at the upper 1 / 3 and the lower 1 / 3, the hinge element 13 and the disc spring 12 are connected by surface welding, and the shaping rod 14 is embedded in the hinge element 13 (that is, the shaping rod 14 is hingedly connected to the hinge element 13), forming a steady-state structure, and the shaping rod 14 has a certain weak rigidity, and is preferably made of steel such as low-carbon steel, so that the special flexible element 10 can maintain an effective connection in the working state and can normally play the system flexibility compensation function. The disc spring 12 type commonly used is mostly F type, that is, the shelf type bracket bearing plate type, such as Figure 3 As shown, its load range is 500N~230000N, the vertical displacement range is 50~220mm, the dead weight is 40kg~2000kg, the height is 600mm~1600mm, and the diameter is 200mm~500mm.

[0047] A pulverized coal feeding device is provided at the upper part of the gasifier 1, and an electric heating furnace is provided at the lower part to provide a heat source therefor.

[0048] Balance lines 11, i.e., pressure balance lines, are respectively arranged between the high-pressure slag hopper 4 and the pressure-transformation slag hopper 5, between the first-rotation high-pressure ash hopper 6 and the first-rotation pressure-transformation ash hopper 7, and between the second-rotation high-pressure ash hopper 8 and the second-rotation pressure-transformation ash hopper 9, for balancing the pressure changes between the high-pressure equipment and the pressure-transformation equipment; Figure 4The typical load-displacement characteristic curve of the disc spring 12 shown in the figure enables the system to always operate in a steady-state condition, so that the working range of the special flexible element 10 is always between the maximum load and the minimum load without drastic high-amplitude changes.

[0049] The coal catalytic gasification gasification process includes the following steps:

[0050] The raw coal powder is quantitatively fed into the gasifier 1 through the feeding device (the gasification furnace gas output is 300~700Nm 3 / h, coal powder processing capacity 1~3 tons / day), its working temperature is 650℃~810℃, pressure is 3.6MPa~4.2MPa. The furnace gas at the outlet of the gasifier 1 enters the primary cyclone separator 2, its working temperature is 680℃~750℃, pressure is 3.6MPa~4.2MPa, the separated raw coal gas enters the secondary cyclone separator 3, its working temperature is 680℃~750℃, pressure is 3.6MPa~4.2MPa, the solid separated by the primary cyclone separator 2 and the secondary cyclone separator 3 is discharged to the first cyclone high pressure ash hopper 6 and the second cyclone high pressure ash hopper 8 respectively, its working temperature is 280℃~360℃, pressure is 3.6MPa~4.2MPa, and then passes through the first cyclone variable pressure ash hopper 7 and the second cyclone variable pressure ash hopper 9, its working temperature is 280℃~360℃, pressure is 3.6MPa~4.2MPa, and then discharged.

[0051] The slag of the gasifier 1 is discharged by dry method, and the slag is discharged and collected outside through the high-pressure slag hopper 4 and the variable-pressure slag hopper 5. The working temperature of the high-pressure slag hopper 4 and the variable-pressure slag hopper 5 are both 460℃~550℃, and are maintained at a constant temperature; the pressure of the high-pressure slag hopper 4 is constant within the range of 3.6MPa~4.2MPa, and the variable-pressure slag hopper 5 is floating within the range of 3.6MPa~4.2MPa.

[0052] Since the medium used for coal catalytic gasification is coal powder, the pipeline is basically vertical or oblique downward, so it is not suitable to install a support for the pipeline. The high-pressure slag bucket 4, the first-rotation transformer ash hopper 7, and the second-rotation transformer ash hopper 9 are equipped with special flexible elements 10, which can transfer the load and thrust that should have acted on the pipeline support to the equipment body with higher strength, greatly improving the system's stress conditions. The special flexible element 10 is a combination of components such as disc springs 12, hinged elements 13, and shaping rods 14 combined according to mechanical properties. Its top surface is connected to the lower edge of the support ears of the high-pressure slag bucket 4, the first-rotation transformer ash hopper 7, and the second-rotation transformer ash hopper 9 with bolts. The special flexible element 10 has three working conditions, including vertical working condition, horizontal working condition and vertical-horizontal coupling working condition; the vertical working condition is mainly used for the cyclone system as an operating device arranged vertically up and down; the horizontal working condition is used for the cyclone system with a horizontal or obliquely arranged operating device; the vertical-horizontal coupling working condition is used for the operating device with both operating arrangements. When arranging the vertical working condition, the stress state of the device can be optimized simply by relying on the elastic compensation ability of the disc spring 12 in the special flexible element 10; in the horizontal working condition, the hinge element 13 and the shaping rod 14 of the special flexible element 10 will play a role, that is, according to the different horizontal force directions and loads of each ear of the equipment, the deformation stiffness of the shaping rod itself is changed by adjusting the length of the shaping rod, so that the load level of each ear is redistributed; the vertical-horizontal coupling working condition is that the first two act at the same time, producing an excellent compensation effect.

[0053] Due to the characteristics of the medium used in coal catalytic gasification, the pipeline is basically vertical or oblique downward, and it is not suitable to set a support for the pipeline. The special flexible element 10 eliminates the necessity of setting pipeline supports and hangers under special working conditions, and is more adaptable to similar rotary systems that cannot use conventional pipeline support and hanger optimization methods to reduce system stress levels.

[0054] The special flexible element 10 adopts a disc spring support bracket in which the load does not change with the change of the vertical displacement at the support point when it bears the deadweight load of the equipment and the pipeline, that is, the load remains constant.

[0055] By utilizing the analysis and design criteria and combining the stress analysis calculation program, the thermal stress conditions of the high-temperature rotation system are comprehensively considered to accurately and efficiently obtain the reliable thermal stress level of the system; the software that can be used for the calculation is, for example, the equivalent stiffness method calculation program, the SAP5 program, the petrochemical non-buried pipeline design and identification program PBAA, and the CAESAR II software. Currently, the CAESAR II software is the preferred program for pipeline stress analysis and calculation. Therefore, the utility model preferably uses this software for stress analysis and calculation.

[0056] Stress analysis uses the formula:

[0057] (Formula 1)

[0058] In formula 1:

[0059] S b ——Compound bending stress; Pa

[0060] i i ——in-plane stress intensification factor;

[0061] i o ——out-of-plane stress intensification factor;

[0062] M i ——Bending moment in the plane; N·m

[0063] M o ——Bending moment out of plane; N·m

[0064] Z - section modulus of the pipe.

[0065] i i 、i o 、M i 、M o The values ​​of , Z are selected according to ASME B31.3 standard.

[0066] By calculating the synthetic bending stress (approximately equal to the total thermal stress), the thermal stress level is determined, and the specific model of the disc spring 12 can be selected, and then the special flexible element suitable for the device is designed in combination with the hinge element 13 and the shaping rod 14. The utility model effectively reduces the special flexible element with high thermal stress level in the system. According to the thermal stress calculation, the thermal stress level is determined, and the specific model of the disc spring 12 can be selected. The specific operation process is: according to the calculation results, the thermal stress level is controlled to be below 90% of the allowable stress value of the material, and the time thermal displacement and the maximum load value of the thermal condition are obtained (for example, through the software CAESAR II), and the most economical and reasonable nominal displacement and nominal load are selected according to them, and then the specification type of the disc spring can be selected; when the thermal stress level is above 90% of the allowable stress value of the material, it is necessary to combine the natural compensation conditions in the system or optimize the equipment layout to reduce its stress level, and then select a suitable disc spring. Then, the special flexible element suitable for the device is designed in combination with the hinge element 13 and the shaping rod 14. The nominal displacement value and the nominal load value are both selected from the nominal data series of the support and hanger data manual; the nominal displacement of the disc spring selected is required to be, for example, 20% larger than the calculated displacement, and at least 20mm larger; and the absolute value of the difference between the nominal load value of the disc spring selected and the calculated maximum load value is required to be the smallest. The nominal displacement value and the nominal load value are respectively used as the nameplate displacement and nameplate load of the specific spring type supplied by the manufacturer in the manual and the entity spring, that is, the nominal displacement and nominal load. The utility model effectively reduces the special flexible component with high thermal stress levels in the system. It effectively responds to the high-risk stress concentration areas caused by the high-amplitude thermal displacement of the system to the pipeline system and equipment system, and greatly avoids safety risks. The flexible device of the rotary system saves the one-time construction investment cost of the device and ensures the safety, reliability and stability of the operation of the device system.

[0067] Comparative Example 1 (i.e. existing cyclone system)

[0068] If there is no special flexible element 10 in the device, then Figure 1 The device of the utility model, the remaining process steps and process parameters are the same as those of the following embodiment 1. As described in the background technology section, when the coal processing capacity of the catalytic gasification device is 300t / a, it can be calculated by CAESAR II software that the vertical thermal displacement of the cyclone system can reach 70~110mm. As a result, the stress of the cyclone system may exceed the standard, and even the pipeline and equipment may leak or cause casualties. Example 1

[0069] The raw coal powder is quantitatively fed into the gasifier 1 through the feeding device (the gasification furnace gas output is 300~700Nm 3 / h, coal powder processing capacity 1~3 tons / day), its working temperature is 650℃~810℃, pressure is 3.6MPa~4.2MPa. The furnace gas at the outlet of the gasifier 1 enters the primary cyclone separator 2, its working temperature is 680℃~750℃, pressure is 3.6MPa~4.2MPa, the separated raw coal gas enters the secondary cyclone separator 3, its working temperature is 680℃~750℃, pressure is 3.6MPa~4.2MPa, the solid separated by the primary cyclone separator 2 and the secondary cyclone separator 3 is discharged to the first cyclone high pressure ash hopper 6 and the second cyclone high pressure ash hopper 8 respectively, its working temperature is 280℃~360℃, pressure is 3.6MPa~4.2MPa, and then passes through the first cyclone variable pressure ash hopper 7 and the second cyclone variable pressure ash hopper 9, its working temperature is 280℃~360℃, pressure is 3.6MPa~4.2MPa, and then discharged.

[0070] The slag from the gasifier 1 is discharged by dry method, and is discharged through the high-pressure slag hopper 4 and the variable-pressure slag hopper 5 at an operating temperature of 460°C to 550°C and a pressure of 3.6MPa to 4.2MPa, and then discharged and collected.

[0071] The high-pressure slag hopper 4, the first-rotation transformer ash hopper 7, and the second-rotation transformer ash hopper 9 are provided with special flexible elements 10, which can transfer the load and thrust acting on the pipeline support to the equipment body with higher strength, greatly improving the system stress condition.

[0072] The special flexible element 10 eliminates the necessity of setting pipeline supports and hangers under special working conditions, and is more adaptable to similar rotary systems that cannot use conventional pipeline support and hanger optimization methods to reduce system stress levels.

[0073] The special flexible element 10 adopts a disc spring support bracket that does not change with the change of vertical displacement at the support point when it bears the deadweight load of equipment and pipelines, that is, the load remains constant. This system mainly refers to the basic load-bearing plate type F 1 Type of disc spring support bracket.

[0074] The special flexible element 10 is a component combination composed of a disc spring 12, a hinge element 13, a forming rod 14, etc. according to mechanical characteristics, and its top surface is connected with the lower edge surface of the support ears of the high-pressure slag bucket 4, the first rotary transformer ash bucket 7, and the second rotary transformer ash bucket 9 by bolts. The special flexible element 10 has three working conditions, including vertical working condition, horizontal working condition and vertical and horizontal coupling working condition. In vertical working condition, the stress state of the device can be optimized simply by relying on the elastic compensation ability of the disc spring 12 in the special flexible element 10; in horizontal working condition, the hinge element 13 and the shaping rod 14 of the special flexible element 10 will play a role, that is, according to the different horizontal force directions and loads of each ear of the equipment, the deformation stiffness of the shaping rod itself is changed by adjusting the length of the shaping rod, so that the load level of each ear is redistributed; the net distance between the ears, the length of the shaping rod, and the stiffness of the shaping rod, the diameters of these three have a periodic functional relationship, so they can be shaped by each other; in the vertical and horizontal coupling condition, the former two act simultaneously to produce an excellent compensation effect. The basic length of the shaping rod depends on the inner wiring length of the lug of the center circle of the lug of the equipment supported by the special flexible element 10, which is almost equal to the outer diameter of the equipment. The variable length of the shaping rod 14 depends on the horizontal load level under the horizontal working condition. The shaping rod 14 is connected to each disc spring 12 by a hinge element 13, and the connection is made by a clockwise downhill mode of circular turning, which is convenient for the formation of mechanical balance. The specifications of the disc spring 12 are determined according to the displacement and load range to be compensated calculated according to the analysis and design criteria. The corresponding values ​​and disc spring specifications can be found in the relevant support and hanger data manual (the support and hanger data manual is derived from the existing engineering data manual and / or the current national standards and specifications); in this example, the F-type shelf support bearing plate type is selected, with a nominal load of 6000N, a nominal displacement of 120mm, a dead weight of 80kg, a height of 850mm, and a diameter of 320mm. The special flexible element 10 can be made of low-carbon steel, which is low-cost and easy to manufacture.

[0075] When the coal processing capacity of the catalytic gasification device is 300t / a, the stress level of the cyclone system of Example 1 will drop significantly, and a large amount of vertical thermal displacement will be compensated and absorbed by the special flexible element 10. After absorption, through stress analysis and calculation again, it can be calculated that the remaining thermal displacement is less than 35mm, which can be naturally compensated by the flexibility of the pipeline itself, ensuring the stability of the thermal stress condition of the system.

[0076] By using the analysis and design criteria and combining the stress analysis calculation program, the thermal stress conditions of the high-temperature cyclone system are comprehensively considered to accurately and efficiently obtain the reliable thermal stress level of the system; the utility model effectively reduces the high thermal stress level in the system with special flexible components. It effectively responds to the high-risk stress concentration areas caused by the high-amplitude thermal displacement of the system to the pipeline system and equipment system, greatly avoiding safety risks. The flexible device of the cyclone system saves the one-time construction investment cost of the device and ensures the safety, reliability and stability of the device system operation.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A cyclone system for coal catalytic gasification gasification process, characterized in that: The device comprises: a gasifier (1), a primary cyclone separator (2), a secondary cyclone separator (3), a high-pressure slag hopper (4), a variable-pressure slag hopper (5), a first-cyclone high-pressure ash hopper (6), a first-cyclone variable-pressure ash hopper (7), a second-cyclone high-pressure ash hopper (8), a second-cyclone variable-pressure ash hopper (9) and a special flexible element (10); the top outlet of the gasifier (1) is connected to the primary cyclone separator (2), the top outlet of the primary cyclone separator (2) is connected to the secondary cyclone separator (3); the high-pressure slag hopper (4) and the variable-pressure slag hopper (5) are connected in series at the bottom of the gasifier (1); the first-cyclone separator (2) is connected in series to the first-cyclone high-pressure ash hopper (6) and the first-cyclone variable-pressure ash hopper (7); the second-cyclone separator (3) is connected in series to the second-cyclone high-pressure ash hopper (8) and the second-cyclone variable-pressure ash hopper (9); The high-pressure slag bucket (4), the first rotary pressure-transformer ash bucket (7), and the second rotary pressure-transformer ash bucket (9) are all provided with a special flexible element (10), the special flexible element (10) being composed of a plurality of disc springs (12), hinge elements (13) arranged on the disc springs, and a shaping rod (14) connecting the hinge elements of different disc springs, the tops of the plurality of disc springs (12) being connected to the bottoms or lower parts of the high-pressure slag bucket (4), the first rotary pressure-transformer ash bucket (7), and the second rotary pressure-transformer ash bucket (9), and the bottom surfaces of the disc springs (12) being fixedly connected to a foundation or a pedestal.

2. The cyclone system according to claim 1, characterized in that: The gasifier (1) is provided with a pulverized coal feeding device at the top and a heat source heating system at the bottom.

3. The cyclone separation system according to claim 1, characterized in that: A plurality of disc springs (12) are distributed at a plurality of corners at the bottom of the high-pressure slag bucket (4), the first rotary pressure-transformer ash bucket (7), and the second rotary pressure-transformer ash bucket (9), and the top surfaces of the disc springs (12) are connected and fixed to the lower edge surfaces of the support ears of the high-pressure slag bucket (4), the first rotary pressure-transformer ash bucket (7), and the second rotary pressure-transformer ash bucket (9).

4. The cyclone system according to claim 3, characterized in that: The top surface of the disc spring (12) is connected to the lower edge surfaces of the support ears of the high-pressure slag bucket (4), the first rotary transformer ash bucket (7), and the second rotary transformer ash bucket (9) by bolts. The top surface connecting plate of the disc spring (12) of the special flexible element (10) and the bottom plate under the equipment support ear are both provided with bolt holes, and the number of holes corresponds to each other. Bolts, nuts, and washers are used to connect and fix them.

5. The cyclonic separation system according to any one of claims 1 to 4, characterized in that: An articulated element is respectively arranged at the upper part and the lower part of the disc spring, and the two articulated elements of each disc spring are respectively connected to the articulated elements of the other two disc springs through a shaping rod.

6. The cyclonic separation system according to claim 5, characterized in that: The hinge elements (13) are respectively arranged at 1 / 5 to 2 / 5 of the height and 3 / 5 to 4 / 5 of the disc spring (12). The hinge elements (13) and the disc spring (12) are connected by surface welding, and the shaping rod (14) is embedded in the hinge elements (13).

7. The cyclonic separation system according to claim 6, characterized in that: The hinge elements (13) are respectively arranged at the upper 1 / 3 and the lower 1 / 3 of the disc spring (12).

8. The cyclonic separation system according to any one of claims 1 to 4, characterized in that: Balance lines (11) are respectively arranged between the high-pressure slag hopper (4) and the pressure-variable slag hopper (5), between the first-rotor high-pressure ash hopper (6) and the first-rotor pressure-variable ash hopper (7), and between the second-rotor high-pressure ash hopper (8) and the second-rotor pressure-variable ash hopper (9).

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