Treatment device for dust deposition and scaling of TRT blade

Abstract

The utility model relates to the technical field of TRT blade dust deposition treatment, and particularly discloses a TRT blade dust deposition and scaling treatment device which comprises a steam joint arranged at the top of a TRT and communicated with the interior of the TRT, a high-pressure hose detachably connected with the steam joint and a steam pipeline capable of supplying high-pressure steam into the high-pressure hose. The steam connector and the high-pressure hose are each provided with a control valve capable of controlling circulation and disconnection of steam, a pressure gauge is arranged at the end of the steam pipeline, and the two ends of the high-pressure hose are each provided with a connecting assembly capable of being connected with the steam connector and the steam pipeline. The device disclosed by the utility model can be used for simply, economically and easily treating dust deposition and scaling of the TRT blade.

Description

Technical Field

[0001] The present application relates to the technical field of TRT blade dust accumulation treatment, and specifically discloses a device for treating TRT blade dust accumulation and scaling. Background Art

[0002] TRT (i.e. blast furnace gas residual pressure turbine power generation device) is a device that utilizes the pressure energy and thermal energy of blast furnace top gas, a byproduct of blast furnace smelting, to make the gas work through a turbine expander, convert it into mechanical energy, and then convert the mechanical energy into electrical energy. The blade is the core component of the TRT device, and its working environment is extremely complex and harsh. During the working process, dust is easily accumulated on the surface of the blade, and the dust accumulation causes the structure of the blade to change. In addition, the dust will fall off at any time during the operation of the unit. The consequences are: in the mild case, it causes excessive vibration of the unit, and in the severe case, it causes the blade to break and force shutdown, which will bring serious economic losses to the enterprise.

[0003] Due to the influence of the comprehensive charge structure of the blast furnace, accidents caused by dust accumulation during the operation of TRT are common. For example, after a blast furnace was put into production, it had been shut down due to rotor imbalance failure many times. Every time the cylinder was opened, it was found that there was 2.0-3.0cm thick dust on the TRT turbine blades. The dust scale adhered to the blades. Due to vibration and other reasons, some of them fell off, and the blades would be polarized. When the polarization reached a certain amplitude, it would cause the turbine to shut down due to vibration failure, which had a serious impact on the normal production of the blast furnace. Within 10 months after the TRT of a steel plant was put into operation, the shaft vibration exceeded the standard due to salt accumulation on the turbine blades. The cylinder was opened to clean the salt accumulation 9 times. In the most serious case, it was forced to shut down due to excessive shaft vibration after only one week of operation. After analysis, it was found that the TRT gas outlet temperature was below 70℃~80℃, and a large amount of salt in the gas on the exhaust side precipitated and the dust accumulated with condensed water in the exhaust side pipeline and on the secondary moving and static blades, reducing the power generation efficiency.

[0004] At present, the methods for taking measures to deal with dust accumulation on TRT itself are roughly as follows:

[0005] 1. TRT needs to be shut down to remove dust, which is time-consuming, labor-intensive and causes great economic losses.

[0006] 2. Rinse with water. Since the accumulated salt is easily soluble in water, rinse the blades after stopping the machine to remove the accumulated salt. The water temperature is low and the dissolution effect is poor, and the machine needs to be stopped for treatment;

[0007] 3. Install a dosing device in front of the turbine inlet pipe, spray the scale inhibitor online, so that the agent reacts with ammonium chloride and other substances in advance, and the new substances formed are discharged from the TRT device together with the mixed gas, thereby achieving the purpose of inhibiting the formation of salt scale on the blades. This method has been implemented in many steel companies and has obvious effects, but it requires dosing devices and agents, which is costly.

[0008] Therefore, in view of this, the inventor provides a device for treating dust and scaling of TRT blades to solve the above-mentioned problem. Utility Model Content

[0009] The purpose of the utility model is to provide a simple, economical and easy-to-use device for treating dust and scaling of TRT blades, so as to solve the related technical problems raised in the above-mentioned background technology.

[0010] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a device for treating dust and scaling of TRT blades, comprising a steam joint arranged at the top of the TRT and connected to the interior of the TRT, a high-pressure hose detachably connected to the steam joint, and a steam pipe capable of supplying high-pressure steam to the high-pressure hose, the steam joint and the high-pressure hose are both provided with control valves capable of controlling the flow and disconnection of steam, and a pressure gauge is provided at the end of the steam pipe, and both ends of the high-pressure hose are respectively provided with connecting components capable of being connected to the steam joint and the steam pipe.

[0011] Further, the connection component comprises:

[0012] A fixing sleeve, arranged at the end of the steam joint or the steam pipe;

[0013] The rotating sleeve is arranged on the outer wall of the high-pressure hose and is threadedly connected with the fixed sleeve.

[0014] Furthermore, the cross section of the rotating sleeve is L-shaped, and the outer wall of the high-pressure hose is symmetrically provided with support rings located on both sides of the rotating sleeve, and an annular groove adapted to the rotating sleeve and capable of accommodating the rotating sleeve to rotate is formed between the support rings.

[0015] Furthermore, a first sealing ring is provided on the inner wall of the rotating sleeve, and sealing grooves for accommodating the fixed sleeve and the end of the high-pressure hose to be inserted are respectively provided on the side walls of the first sealing ring.

[0016] Furthermore, a fixing groove is provided on the inner wall of the rotating sleeve, a fixing ring is clamped in the fixing groove, and the first sealing ring is clamped with the inner wall of the fixing ring.

[0017] Furthermore, an external thread is provided at the end of the fixing sleeve, and an internal thread matching the external thread is provided on a side wall of the rotating sleeve facing the fixing sleeve.

[0018] Furthermore, a second sealing ring located between the internal thread and the first sealing ring is clamped on the inner wall of the rotating sleeve.

[0019] The principle and effect of this scheme are:

[0020] By analyzing the ash samples of TRT blades, it was confirmed that the main components of the ash are crystals of ammonium chloride and ash. Among them, 98% are crystals of ammonium chloride, with a chloride ion content of 55%, an ammonium ion content of 30%, and an insoluble residue content of about 15% (mainly Fe, Sio2, dust, etc.). Appearance characteristics: The ash is white, with stratification, and the ash particles are loose. NH4C1 is a colorless cubic crystal or white crystal, which is yellow when containing impurities, and tastes salty, cool and slightly bitter. The relative density is 1.527, easily soluble in water, soluble in liquid ammonia, slightly soluble in alcohol, insoluble in acetone and ether. It begins to volatilize significantly when heated to 100°C, and its solubility in water increases significantly with increasing temperature. That is, the main components of TRT ash accumulation are the crystallization of ammonium chloride and ash. The crystallization temperature of ammonium chloride is below 90°C, so when the TRT exhaust temperature is above 90°C, ash accumulation will basically not occur. The 100°C heating steam can just fully dissolve the ammonium chloride salt accumulation, and the steam is sprayed onto the surface of the TRT blades through the steam pipe, high-pressure hose and steam joint. The purpose of cleaning the ash can be achieved by steam blowing. This method is simple, economical and easy.

[0021] The utility model connects the high-pressure hose to the steam pipe and the steam joint through a connecting component. Compared with the traditional clamp fixing and locking, there is no need to set the high-pressure hose sleeve on the outer wall of the steam pipe and the steam joint to ensure the sealing performance of the connection, which effectively reduces the deformation of the high-pressure hose during the connection process and improves the service life of the high-pressure hose. Moreover, the fixed connection between the high-pressure hose and the steam pipe and the steam joint can be achieved only through the threaded cooperation between the fixed sleeve and the rotating sleeve, making the installation and disassembly of the high-pressure hose to the steam pipe and the steam joint more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of a device for treating dust and scaling of TRT blades proposed in an embodiment of the present application is shown;

[0024] Figure 2 A flow chart of a device for treating dust and scaling of TRT blades proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] The figure marks in the drawings of the specification include: steam joint 1, clutch 2, axial flow compressor 3, speed increaser 4, generator 5, vent pipe 6, control valve 7, high-pressure hose 8, pressure gauge 9, fixed sleeve 10, rotating sleeve 11, threaded section 12, fixed ring 13, first sealing ring 14, second sealing ring 15, and limit ring 16.

[0027] In the process of coal gas doing work through the turbine expander, high-temperature coal gas usually enters the TRT, driving the blades of the TRT to rotate. The rotation of the TRT blades sequentially passes through the clutch 2, the axial flow compressor 3, the speed increaser 4 and the generator 5 to generate electricity, and a vent pipe 6 is arranged on the top of the TRT for purging.

[0028] This embodiment discloses a device for treating dust and scaling of TRT blades, for example Figure 1 As shown: it includes a steam joint 1 arranged on the top of the TRT and connected to the inside of the TRT, a high-pressure hose 8 detachably connected to the steam joint 1, and a steam pipe that can supply high-pressure steam to the high-pressure hose 8, wherein the steam joint 1 is connected to the vent pipe 6 on the top of the TRT, and the steam joint 1 and the high-pressure hose 8 are provided with a control valve 7 that can control the flow and disconnection of steam, and a pressure gauge 9 is provided at the end of the steam pipe, and both ends of the high-pressure hose 8 are provided with connecting components that can be connected to the steam joint 1 and the steam pipe, and the steam pipe is connected to the pipes or equipment for heating steam in the workshop building.

[0029] like Figure 2As shown, the connection assembly includes a fixed sleeve 10 and a rotating sleeve 11, wherein the fixed sleeve 10 is arranged at the end of the steam joint 1 or the steam pipe, the rotating sleeve 11 is arranged on the outer wall of the high-pressure hose 8 and is threadedly connected to the fixed sleeve 10, and a threaded section 12 is provided between the rotating sleeve 11 and the fixed sleeve 10 for matching, specifically: an external thread is provided at the end of the fixed sleeve 10, an internal thread matching the external thread is provided on the inner wall of the rotating sleeve 11, the cross section of the rotating sleeve 11 is L-shaped, and the outer wall of the high-pressure hose 8 is symmetrically provided with support rings located on both sides of the rotating sleeve 11, and a groove matching the rotating sleeve 11 and allowing the rotating sleeve 11 to rotate is formed between the support rings. The support ring adopts a hard structure and is completely fixed to the high-pressure hose 8 by gluing to prevent the rotating sleeve 11 from detaching from the high-pressure hose 8. A sealing sleeve is sleeved on the surface of the support ring. A fixing groove is provided on the inner wall of the rotating sleeve 11. A fixing ring 13 is clamped in the fixing groove. The fixing ring 13 also adopts a hard material. A first sealing ring 14 is clamped on the inner wall of the fixing ring 13. The side walls of the first sealing ring 14 are respectively provided with sealing grooves for accommodating the fixing sleeve 10 and the end of the high-pressure hose 8 to be inserted. A second sealing ring 15 located between the internal thread and the first sealing ring 14 is also clamped on the inner wall of the rotating sleeve 11.

[0030] By using this connecting assembly for connection, it is not necessary to sleeve the high-pressure hose 8 on the outer wall of the steam pipe and the steam joint 1 to ensure the sealing performance of the connection, which effectively reduces the deformation of the high-pressure hose 8 during the connection process and increases the service life of the high-pressure hose 8. Moreover, the fixed connection between the high-pressure hose 8 and the steam pipe and the steam joint 1 can be achieved only through the threaded cooperation between the fixed sleeve 10 and the rotating sleeve 11, making the installation and disassembly of the high-pressure hose 8 and the steam pipe and the steam joint 1 more convenient and quick.

[0031] In the specific implementation process of this embodiment, when the TRT operation vibration curve is abnormal, the high-pressure hose 8 is first connected to the steam pipe and the steam joint 1 through the connecting assembly, and then the control valve 7 is opened, and steam is sprayed to the surface of the TRT blade through the steam pipe, the high-pressure hose 8 and the steam joint 1. The steam pressure is maintained above 150Kpa and blown continuously for about 1 hour. When the TRT operation vibration curve stabilizes and returns to normal values, the high-pressure hose 8 is removed and stored. The staff wears an air respirator and a portable carbon monoxide alarm to the site, opens the turbine inlet pipe, outlet pipe and the sewage valve under the turbine to remove dirt and condensed water.

[0032] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for treating dust and scaling of TRT blades, characterized by: It includes a steam joint arranged on the top of the TRT and connected to the inside of the TRT, a high-pressure hose detachably connected to the steam joint and a steam pipe capable of supplying high-pressure steam to the high-pressure hose. The steam joint and the high-pressure hose are both provided with control valves capable of controlling the flow and disconnection of steam, and a pressure gauge is provided at the end of the steam pipe. Both ends of the high-pressure hose are respectively provided with connection components capable of being connected to the steam joint and the steam pipe.

2. A device for treating dust and scaling of TRT blades according to claim 1, characterized in that: The connection component comprises: A fixing sleeve, arranged at the end of the steam joint or the steam pipe; The rotating sleeve is arranged on the outer wall of the high-pressure hose and is threadedly connected with the fixed sleeve.

3. A device for treating dust and scaling of TRT blades according to claim 2, characterized in that: The cross section of the rotating sleeve is L-shaped, and the outer wall of the high-pressure hose is symmetrically provided with support rings located on both sides of the rotating sleeve, and an annular groove adapted to the rotating sleeve and capable of accommodating the rotating sleeve to rotate is formed between the support rings.

4. A device for treating dust and scaling of TRT blades according to claim 2 or 3, characterized in that: The inner wall of the rotating sleeve is also provided with a first sealing ring, and the side walls on both sides of the first sealing ring are respectively provided with sealing grooves for accommodating the fixed sleeve and the end of the high-pressure hose to be inserted.

5. A device for treating dust and scaling of TRT blades according to claim 4, characterized in that: The inner wall of the rotating sleeve is provided with a fixing groove, a fixing ring is clamped in the fixing groove, and the first sealing ring is clamped with the inner wall of the fixing ring.

6. A device for treating dust and scaling of TRT blades according to claim 5, characterized in that: The end of the fixing sleeve is provided with an external thread, and the side wall of the rotating sleeve facing the fixing sleeve is provided with an internal thread matched with the external thread.

7. A device for treating dust and scaling of TRT blades according to claim 6, characterized in that: The inner wall of the rotating sleeve is also clamped with a second sealing ring located between the internal thread and the first sealing ring.

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