Waste heat boiler dry bottom hopper device

Abstract

The utility model provides a waste heat boiler dry bottom hopper device which comprises a dry bottom hopper, a sealing sand tank is arranged above the dry bottom hopper, the dry bottom hopper and the sealing sand tank are connected through a flange, a water cooling wall is arranged at the top of the sealing sand tank, a flexible connector is arranged at the bottom of the dry bottom hopper, a scraper conveyor is arranged below the flexible connector, and the scraper conveyor and the sealing sand tank are fixedly connected. By changing the connection mode and structure of the dry bottom hopper, the water-cooled wall above the dry bottom hopper and the scraper conveyor below the dry bottom hopper, the buffer distance of falling coke impacting the dry bottom hopper is increased, the phenomenon that a large number of coke blocks impact equipment such as water-cooled wall furnace tubes and scraper conveyor chains is prevented, the risk that the water-cooled wall furnace tubes deform and leak or the scraper conveyor is damaged is eradicated, and the service life of the dry bottom hopper is prolonged. After manufacturing is completed, the purpose of safe and stable operation of the waste heat boiler scraper conveyor and the water cooling wall can be achieved, operation is easy, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat boilers and relates to a cold ash hopper device for a waste heat boiler. Background Art

[0002] During the operation of the waste heat boiler, due to the furnace conditions and material composition, the top of the boiler is heavily coked, and the water-cooled wall and ash hopper at the entrance of the convection zone are damaged after falling: the water-cooled wall is deformed, the ash hopper is cracked, and the scraper sinks. Therefore, in order to ensure the safe and stable operation of the waste heat boiler of the top-blown furnace, it is necessary to optimize the structure of the water-cooled wall, ash hopper, and scraper in the convection zone of the waste heat boiler of the top-blown furnace. Utility Model Content

[0003] The utility model aims to provide a waste heat boiler cold ash hopper device in response to the problems existing in the prior art, which solves the problem that the existing ash hopper and water-cooled wall structure directly acts on the ash hopper and the scraper conveyor below the ash hopper after the coke falls off the furnace top, causing damage to the scraper conveyor and the water-cooled fireplace pipe, resulting in unsafe operation of the waste heat boiler.

[0004] To this end, the utility model adopts the following technical solutions:

[0005] A waste heat boiler cold ash hopper device comprises a cold ash hopper, a sealed sand trough is provided above the cold ash hopper, and the two are connected by a flange, a water-cooled wall is provided on the top of the sealed sand trough, a soft connection is provided at the bottom of the cold ash hopper, a scraper conveyor is provided below the soft connection, and the two are fixedly connected.

[0006] Furthermore, the flexible connection adopts a sealing ring, and the sealing ring is made of glass fiber and high-temperature refractory wool. Both ends of the flexible connection are connected to the cold ash hopper through bolts and pressure strips.

[0007] Furthermore, the sealing sand groove and the water-cooled wall are sealed by filling sand and silicate coating.

[0008] Furthermore, an expansion distance of 50-80 mm is provided between the flexible connection and the scraper conveyor.

[0009] The beneficial effects of the utility model are:

[0010] The utility model is mainly used in a vertical waste heat boiler system, changes the connection mode and structure of the cold ash hopper with the upper water-cooled wall and the lower scraper conveyor, increases the buffer distance of the coke falling and impacting the cold ash hopper, prevents the phenomenon that a large number of coke blocks impact the water-cooled fireplace tube and the scraper conveyor chain and other equipment, eliminates the risk of deformation and leakage of the water-cooled fireplace tube or damage to the scraper conveyor, and after completion, the purpose of safe and stable operation of the scraper conveyor and the water-cooled wall of the waste heat boiler can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure, 1-water-cooled wall, 2-sealed sand trough, 3-cold ash hopper, 4-flexible connection, 5-scraper conveyor. DETAILED DESCRIPTION

[0013] The technical solution of the utility model is described below in conjunction with the accompanying drawings and implementation methods.

[0014] like Figure 1 As shown, a cold ash hopper device of a waste heat boiler includes a cold ash hopper 3, a sealed sand trough 2 is provided above the cold ash hopper 3, and the two are connected by a flange; a water-cooled wall 1 is provided on the top of the sealed sand trough 2, a soft connection 4 is provided at the bottom of the cold ash hopper 3, a scraper conveyor 5 is provided below the soft connection 4, and the two are fixedly connected; specifically, the soft connection 4 adopts a sealing ring, the manufacturing material of the sealing ring includes glass fiber and high-temperature refractory wool, and both ends of the soft connection 4 are connected to the cold ash hopper 3 by bolts and pressure strips.

[0015] In addition, the sealing sand trough 2 and the water-cooled wall 1 are sealed by filling sand and silicate paint; an expansion distance of 50-80 mm is provided between the flexible connection 4 and the scraper conveyor 5.

[0016] The utility model changes the connection mode between the ash hopper, the scraper conveyor and the water-cooled wall into a soft connection mode, on the one hand, preventing the ash hopper from being damaged by the impact on the scraper conveyor and the water-cooled wall in the convection zone after being subjected to force; on the other hand, the sieve beam is connected to the steel structure of the plant to reduce the probability of coke blocks impacting the equipment, thereby improving the safe and stable operation of the scraper conveyor and the water-cooled wall of the waste heat boiler.

Claims

1. A waste heat boiler cold ash hopper device, characterized in that: The invention comprises a cold ash hopper (3), a sealed sand trough (2) is provided above the cold ash hopper (3), and the two are connected via a flange, a water-cooled wall (1) is provided on the top of the sealed sand trough (2), a flexible connection (4) is provided at the bottom of the cold ash hopper (3), a scraper conveyor (5) is provided below the flexible connection (4), and the two are fixedly connected.

2. A waste heat boiler cold ash hopper device according to claim 1, characterized in that: The flexible connection (4) uses a sealing ring, and the sealing ring is made of glass fibers and high-temperature refractory wool. Both ends of the flexible connection (4) are connected to the cold ash hopper (3) via bolts and pressure strips.

3. A waste heat boiler cold ash hopper device according to claim 1, characterized in that: The sealing sand groove (2) and the water-cooled wall (1) are sealed by filling sand and silicate coating.

4. A waste heat boiler cold ash hopper device according to claim 1, characterized in that: An expansion distance of 50-80 mm is provided between the flexible connection (4) and the scraper conveyor (5).

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