Device for prolonging bed temperature service life of CFB (circulating fluidized bed) boiler

Abstract

The utility model discloses a device for prolonging the bed temperature service life of a CFB (circulating fluid bed) boiler. The device comprises a boiler wall, a flange, a thermocouple, a bed temperature pipe sleeve, a protective sleeve, a castable layer and claws, the temperature of the hearth is measured by the thermocouple penetrating through the protective sleeve into the furnace wall, the thermocouple is protected by the protective sleeve, the castable layer is arranged on the inner wall of the furnace wall, and the claws on the protective sleeve are fixedly arranged in the castable layer, so that the strength of the castable layer is increased, and the wear-resistant protection of the thermocouple is further enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a device for improving the service life of the bed temperature of a CFB boiler. BACKGROUND

[0002] In the prior art, the front wall bed temperature of a CFB boiler is short in service life and often inaccurate, low or even broken during normal operation of the unit due to continuous erosion and wear of the high-temperature bed material in the furnace. When measuring the bed temperature with a thermocouple, the end of the thermocouple is frequently eroded and cracked, and in severe cases, the bed temperature is eroded and broken, resulting in abnormal bed temperature, which poses a significant risk to the safe and economic operation of the boiler. SUMMARY

[0003] The utility model aims to provide a device for improving the service life of the bed temperature of a CFB boiler to solve the problems presented in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a device for improving the service life of the bed temperature of a CFB boiler, comprising:

[0005] A furnace wall is provided with a castable layer on the inner wall, the castable layer is in the shape of a semicircle, and an opening is provided in the middle of the castable layer.

[0006] A protective sleeve passes through the opening of the furnace wall and the castable layer and is welded and fixed to the furnace wall, and one end of the protective sleeve extending into the furnace wall is provided with a claw, which is arranged in the castable layer.

[0007] A thermocouple is sleeved in the protective sleeve, and the measuring end of the thermocouple extends out of the protective sleeve into the furnace wall.

[0008] Preferably, a bed temperature pipe sleeve is further sleeved on the thermocouple, and the length of the bed temperature pipe sleeve is consistent with the length of the thermocouple extending into the furnace wall.

[0009] Preferably, a flange is further fixed outside the furnace wall, and the flange is connected with the thermocouple bed temperature pipe sleeve (4).

[0010] Preferably, the castable layer is made of high-temperature resistant and plastic material.

[0011] Preferably, the thermocouple is a high-temperature and wear-resistant thermocouple.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] The temperature of the furnace bed is measured by the thermocouple passing through the protective sleeve to the furnace wall, the thermocouple is protected by the protective sleeve, and since the refractory layer is arranged on the inner wall of the furnace wall, and the claw is fixedly arranged in the refractory layer, the strength of the refractory layer is increased, and the wear protection of the thermocouple is further strengthened, so that the thermocouple is convenient to measure, and the service life of the thermocouple is greatly improved from 6 months to 3 years. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole schematic view of the utility model;

[0015] In the drawing: 1, furnace wall; 2, flange; 3, thermocouple; 4, bed temperature pipe sleeve; 5, protective sleeve; 6, refractory layer; 7, claw. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0017] Please refer to Figure 1 The utility model provides a kind of technical scheme: a device for improving the service life of CFB boiler bed temperature, comprising:

[0018] Furnace wall 1, refractory layer 6 is arranged on the inner wall of the furnace wall 1, the refractory layer 6 is semicircular arc, and the middle of the refractory layer 6 is provided with an opening;

[0019] Protective sleeve 5;The protective sleeve 5 passes through the opening of the furnace wall 1 and the refractory layer 6, and is fixed on the furnace wall 1, and the end of the protective sleeve 5 extending into the furnace wall 1 is provided with claw 7, and the claw 7 is arranged in the refractory layer 6;

[0020] Thermocouple 3, the thermocouple 3 is sleeved in the protective sleeve 5, and the measurement end of the thermocouple 3 extends out of the protective sleeve 5 to the furnace wall 1.

[0021] The temperature of the furnace bed is measured by the thermocouple 3 passing through the protective sleeve 5 to the furnace wall 1, the thermocouple 3 is protected by the protective sleeve 5, and since the refractory layer 6 is arranged on the inner wall of the furnace wall 1, and the claw 7 on the protective sleeve 5 is fixedly arranged in the refractory layer 6, the strength of the refractory layer 6 is increased, and the protection of the thermocouple 3 is further strengthened.

[0022] In the embodiment, the thermocouple 3 is further sleeved with a bed temperature pipe sleeve 4, the length of the bed temperature pipe sleeve 4 is consistent with the length of the thermocouple 3 extending into the furnace wall 1, the bed temperature pipe sleeve 4 is arranged to further strengthen the protection of the thermocouple 3 and increase the service life of the thermocouple 3.

[0023] In the embodiment, the furnace wall 1 is further fixed with a flange 2, the flange 2 is threadedly connected with the thermocouple 3, and the flange 2 and the thermocouple 3 are threadedly connected.

[0024] In the embodiment, the castable layer 6 is made of high-temperature-resistant plastic.

[0025] In the embodiment, the thermocouple 3 is a high-temperature-resistant and wear-resistant thermocouple.

[0026] In the embodiment, the protective sleeve 5 is composed of a 316L stainless steel 40 steel pipe.

[0027] In the embodiment, the claw Ding 72520 is made of irregular claw Ding.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for increasing the service life of the bed temperature of a CFB boiler, characterized by, It includes: Furnace wall (1), the furnace wall (1) inner wall is provided with castable layer (6), the castable layer (6) is semicircular arc, and the middle part of castable layer (6) is provided with opening; Protective sleeve (5);The protective sleeve (5) passes through the opening of furnace wall (1) and castable layer (6), and is fixed on furnace wall (1), and the end of the protective sleeve (5) extending into furnace wall (1) is provided with claw Ding (7), and the claw Ding (7) is arranged in castable layer (6); Thermocouple (3), the thermocouple (3) is sleeved in protective sleeve (5), and the measuring end of the thermocouple (3) extends out of protective sleeve (5) to furnace wall (1).

2. The device for prolonging the service life of the bed temperature of the CFB boiler according to claim 1, characterized in that: The thermocouple (3) is also sleeved with bed temperature tube sleeve (4), and the length of the bed temperature tube sleeve (4) is consistent with the length of the thermocouple (3) extending into the furnace wall (1).

3. The device for prolonging the service life of the bed temperature of the CFB boiler according to claim 2, characterized in that: The furnace wall (1) is also fixed with flange (2), and the flange (2) and bed temperature tube sleeve (4) are flange connected.

4. The device for prolonging the service life of the bed temperature of the CFB boiler according to claim 3, characterized in that: The castable layer (6) is made of high-temperature resistant plastic material.

5. The device for improving the service life of the bed temperature of the CFB boiler according to claim 4, characterized in that: The thermocouple (3) is high-temperature resistant and wear-resistant.

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