阅读说明：本技术 一种循环流化床气化炉用风帽 (Hood for circulating fluidized bed gasification furnace ) 是由 张忠华 熊俊 杨晓勤 杨华强 王雨 薛良庆 陈彦强 吴维泰 王联志 田丰 于 2021-10-08 设计创作，主要内容包括：本发明涉及一种循环流化床气化炉用风帽,具体由风帽体(1)、内芯管(2)、加强筋Ⅰ(3)、90°弯头(4)、加强筋Ⅱ(5)、风帽支管(6)、气化剂出口I(7)和气化剂出口II(8)组成。本发明技术优势在于：能够有效提高气化剂初始速度,均匀出风,防止堵料；同时,一体铸造的连接方式使得管路的密封性更好,有效防止结渣,增加风帽的使用寿命,提高生产效率；最后,添加加强筋可以有效增加风帽整体结构的稳固性。(The invention relates to a hood for a circulating fluidized bed gasification furnace, which particularly comprises a hood body (1), an inner core pipe (2), a reinforcing rib I (3), a 90-degree elbow (4), a reinforcing rib II (5), a hood branch pipe (6), a gasifying agent outlet I (7) and a gasifying agent outlet II (8). The invention has the technical advantages that: the initial speed of the gasification agent can be effectively improved, air is uniformly discharged, and material blockage is prevented; meanwhile, the connection mode of integral casting enables the sealing performance of the pipeline to be better, slag bonding is effectively prevented, the service life of the blast cap is prolonged, and the production efficiency is improved; finally, the reinforcing ribs are added, so that the stability of the overall structure of the hood can be effectively improved.)

1. The utility model provides a hood for circulating fluidized bed gasifier, comprises the hood body (1), inner core pipe (2), strengthening rib I (3), 90 elbow (4), strengthening rib II (5), hood branch pipe (6), gasification agent export I (7) and gasification agent export II (8), its characterized in that, there are 4 strengthening rib I (3) between the hood body (1) and elbow (4), has 1 strengthening rib II (5) under hood branch pipe (6).

2. The hood for the circulating fluidized bed gasifier according to claim 1, wherein the top of the hood body (1) is an arc top with a certain radian, the top and the outer wall are connected by casting integrally, and the gasifying agent outlets I (7) are uniformly distributed at the lower end of the hood body (1).

3. The hood for the circulating fluidized bed gasifier according to claim 1, wherein the gasifying agent outlets I (7) are round holes with the diameter phi =30-40 mm, the number of the gasifying agent outlets I (7) is 12, and the distance between the circle center of the gasifying agent outlet I (7) and the reinforcing rib (3) is 50-60 mm.

4. The hood for the circulating fluidized bed gasifier according to claim 1, wherein the gasifying agent outlet II (8) is of a round hole type, and the hole diameter is 20-30 mm.

5. The hood for a circulating fluidized bed gasification furnace according to claim 1, wherein the connection between the inner core tube (2), the elbow (4) and the hood branch tube (6) is integrally cast.

Technical Field

The invention belongs to a key technology for enhancing the introducing stability of a gasification agent in a circulating fluidized bed gasification furnace, and particularly relates to a hood for the circulating fluidized bed gasification furnace.

Background

When the circulating fluidized bed gasification furnace operates, the temperature in the furnace reaches up to 900 DEG^oAbout C, the surface temperature of the material particles is higher than the temperature in the furnace by 100-^oC, the bearing temperature of the blast cap is 1200 DEG^oAbove C, the blast cap is required to have strong oxidation resistance, high fatigue resistance, good wear resistance, and the like. The connection mode of the inner core pipe and the air inlet pipe of the existing blast cap is welding, and the blast cap is easy to open welding in a high-temperature environment, so that low-coke slag of the gasification furnace enters the air inlet pipe from the open welding position, the air inlet pipe of the open welding blast cap is seriously abraded at an elbow, other blast caps can be blocked, the work of other blast caps is influenced, the phenomena of uneven fluidization of the gasification furnace, local coking of the furnace wall and the like are caused, the carbon conversion rate is low, and the service life of the gasification furnace is shortened.

Disclosure of Invention

The invention solves the problems: overcomes the defects of the prior art, provides the blast cap for the circulating fluidized bed gasification furnace, realizes uniform fluidization and full solid-contact in the gasification furnace, and can effectively improve the carbon conversion rate.

The technical scheme of the invention is as follows: a hood for a circulating fluidized bed coal gasification furnace mainly comprises a hood body (1), an inner core pipe (2), a reinforcing rib I (3), an elbow (4), a reinforcing rib II (5), a hood branch pipe (6), a gasifying agent outlet I (7) and a gasifying agent outlet II (8).

As further explanation of the invention, the top of the hood body (1) is an arc top with a certain radian, the top and the outer wall are integrally cast, and the gasification agent outlets I (7) are uniformly distributed at the lower end of the hood body (1). Specifically, the gasification agent outlets I (7) are round holes with the aperture phi =30-40 mm, the number of the holes is 12, and the distance between the circle center of the gasification agent outlet I (7) and the reinforcing rib (3) is 50-60 mm.

As a further explanation of the invention, one end of the elbow (4) is connected with the hood body (1), the other end of the elbow is connected with the hood branch pipe (6), and the inner core pipe (2), the elbow (4) and the hood branch pipe (6) are integrally cast.

As a further explanation of the invention, the inner core pipe (2) is characterized in that the bottom and the upper part are distributed with gasification agent outlets II (8), the gasification agent outlets II (8) are round hole type, and the hole diameter is 20-30 mm. Specifically, 4 gasification agent outlets II (8) are uniformly distributed at the top; the gasification agent outlet II (8) at the upper part is divided into an upper layer and a lower layer, the distance between the upper layer and the center of the lower layer hole is 20 mm, 8 gasification agent outlets are uniformly distributed on each layer, and the distance between the center of the upper layer hole and the top is 10-30 mm.

As further explanation of the invention, the reinforcing ribs I (3) are uniformly distributed and fixed at the joint of the hood body (1) and the elbow (4), and the reinforcing ribs II (5) are used for fixing the hood branch pipes (6).

Compared with the prior art, the invention has the advantages that:

(1) the inner core pipe (2), the 90-degree elbow (4) and the blast cap branch pipe (6) are cast integrally, the whole sealing performance is improved, and the stability of the blast cap branch pipe (6) is improved.

(2) The gasifying agent outlet I (7) and the gasifying agent outlet II (8) are round holes, so that the initial wind speed can be improved, and the uniformity of the fluidized bed can be further improved. Meanwhile, the method can effectively prevent the materials from entering the blast cap hole to cause uneven fluidization and bias flow in the furnace, and prevent the blast cap hole and the blast pipeline from being blocked due to adhesion of the coke slag.

(3) The hood body (1) is an arc top, and the connection between the arc top and the outer wall is changed into integral casting from welding, so that the service life of the hood is prolonged.

Drawings

FIG. 1 is a sectional view showing the overall structure of a hood for a circulating fluidized bed gasification furnace.

FIG. 2 is a side view of a hood for a circulating fluidized bed gasifier.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The core idea of the invention is as follows: the circulating fluidized bed gasification furnace is used as a core utilization technology of a coal cleaning high-efficiency technology, and the gasification agent is very important to be fully contacted with raw materials, so that raw material particles can be uniformly fluidized, the fluidization efficiency is high, and the carbon conversion rate is further improved. In view of the above, and in conjunction with FIG. 1, the delivery of gasification agents in the present technology can be summarized as: after entering the fixed blast cap branch pipe (6), the gasifying agent is sprayed out from the gasifying agent outlet II (8) along the 90-degree elbow (4) and the inner core pipe (2), passes through the blast cap body (1) and the partition wall of the inner core pipe (2), and is sent into the gasification furnace from the gasifying agent outlet I (7) to be uniformly mixed with the raw materials. The reinforcing ribs I (3) and the reinforcing ribs II (5) are additionally arranged at key positions, so that the stability of the blast cap is facilitated, the service life of the blast cap is effectively prolonged, and the fluidization uniformity is enhanced.

The present technology is further illustrated below with reference to examples of the present invention.

As shown in figure 1, the blast cap for the circulating fluidized bed coal gasifier mainly comprises a blast cap body (1), an inner core pipe (2), a reinforcing rib I (3), an elbow (4), a reinforcing rib II (5), a blast cap branch pipe (6), a gasifying agent outlet I (7) and a gasifying agent outlet II (8).

As further explanation of the invention, 4 reinforcing ribs I (3) are uniformly distributed between the hood body (1) and the elbow (4), and 1 reinforcing rib II (5) is arranged right below the hood branch pipe (6).

As further explanation of the invention, the top of the hood body (1) is an arc top with a certain radian, the top and the outer wall are integrally cast, and the gasification agent outlets I (7) are uniformly distributed at the lower end of the hood body (1). Specifically, the gasification agent outlets I (7) are round holes with the aperture phi =30-40 mm, the number of the holes is 12, and the distance between the circle center of the gasification agent outlet I (7) and the reinforcing rib (3) is 50-60 mm.

As a further explanation of the invention, one end of the elbow (4) is connected with the hood body (1), the other end of the elbow is connected with the hood branch pipe (6), and the inner core pipe (2), the elbow (4) and the hood branch pipe (6) are integrally cast.

As a further explanation of the invention, the inner core pipe (2) is characterized in that the bottom and the upper part are distributed with gasification agent outlets II (8), the gasification agent outlets II (8) are round hole type, and the hole diameter is 20-30 mm. Specifically, 4 gasification agent outlets II (8) are uniformly distributed at the top; the gasification agent outlet II (8) at the upper part is divided into an upper layer and a lower layer, the distance between the upper layer and the center of the lower layer hole is 20 mm, 8 gasification agent outlets are uniformly distributed on each layer, and the distance between the center of the upper layer hole and the top is 10-30 mm. In other words, the total number of gasifying agent outlets II (8) is 20.

As further explanation of the invention, the reinforcing ribs I (3) are uniformly distributed and fixed at the joint of the hood body (1) and the elbow (4), and the reinforcing ribs II (5) are used for fixing the hood branch pipes (6).

In addition, as a further explanation of the technology of the invention, the blast cap for the circulating fluidized bed gasifier not only can be used as the blast cap of the gasifier, but also can be applied to gas-solid reactors for pyrolysis, combustion and the like.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention. The scope of applicability of the present invention is defined by the appended claims and their equivalents.