Blast furnace gas pretreatment tower

Abstract

The utility model provides a blast furnace gas pretreatment tower. The blast furnace gas pretreatment tower comprises an upper sealing head, a barrel body and a lower sealing head which are sequentially connected from top to bottom, a blast furnace gas outlet is formed in the top of the upper sealing head; a blast furnace gas inlet is formed in the bottom of the lower sealing head; the cylinder body comprises a shell, an outer sleeve and an inner sleeve; the upper end and the lower end of the shell are respectively connected with the upper sealing head and the lower sealing head in a sealing manner; the outer sleeve is arranged in the shell; the inner sleeve is arranged in the outer sleeve; air outlet holes are formed in the side sleeve walls of the outer sleeve and the inner sleeve; a packing layer is also arranged between the outer sleeve and the inner sleeve; the filler layer is filled with a catalyst; a top sealing plate is arranged in the upper sealing head; and the top sealing plate is hermetically connected with the upper end part of the inner sleeve. The utility model solves the problems of unsmooth slag and water discharge and fixed gas inlet direction of the existing radial gas treatment tower.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace gas pretreatment, in particular to a blast furnace gas pretreatment tower. Background Art

[0002] In the process of fine desulfurization of blast furnace gas after the turbine works, the requirements for dust content in the hydrolysis tower are relatively high, generally less than 5mg / Nm3. However, in the actual operation, the unstable blast furnace condition and abnormal bag dust removal cause the dust and other impurities in the blast furnace gas to exceed the standard. When the dust or impurity content exceeds the standard, it is higher than 20mg / Nm3 or even more. In this case, dust or impurities will accumulate in the fine desulfurization equipment in a short time, causing the gas flow channels in the equipment to be blocked, resulting in increased system resistance, and even affecting the normal operation of the system in severe cases.

[0003] Conventional dust removal methods are as follows: 1) Use bag dust collectors. This technology is widely used. However, when blast furnace gas enters the fine desulfurization device, the temperature has dropped, causing water to precipitate, which eventually leads to bag clogging. 2) Use wet dust collectors, also known as washing dust collectors, which use water and blast furnace gas to contact each other, accompanied by heat and mass transfer, and separate dust particles from blast furnace gas through washing. However, wet dust removal requires continuous water spraying, which is a great waste of water and will reduce the calorific value of blast furnace gas.

[0004] At the same time, the characteristics of blast furnace gas are as follows: the dust content changes without fixed rules, the water content is high, and it may contain chloride ion substances. Patent 202223228990.3 provides a radial dechlorination tower for blast furnace gas, but the removed impurities and flushing water are inconvenient to discharge, and the structure is top-in and bottom-out, which cannot meet the bottom-in and top-out layout requirements. The present invention provides a bottom-in and top-out blast furnace gas pretreatment tower, which is simple to manufacture and convenient to discharge. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provides a blast furnace gas pretreatment tower with a gas inlet direction of bottom-in and top-out, thereby solving the problems of poor slag and water discharge and fixed gas inlet direction in the existing radial gas treatment tower.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A blast furnace gas pretreatment tower, the blast furnace gas pretreatment tower comprises an upper head, a cylinder, and a lower head which are sequentially connected from top to bottom;

[0008] The top of the upper end cover is provided with a blast furnace gas outlet; the bottom of the lower end cover is provided with a blast furnace gas inlet;

[0009] The cylinder body comprises an outer shell, an outer sleeve and an inner sleeve; the upper end and the lower end of the outer shell are respectively sealed and connected with the upper head and the lower head; the outer sleeve is arranged in the outer shell; the inner sleeve is arranged in the outer sleeve; the side walls of the outer sleeve and the inner sleeve are both provided with air outlet holes;

[0010] A packing layer is provided between the outer sleeve and the inner sleeve; the packing layer is filled with a catalyst;

[0011] A top sealing plate is arranged inside the upper sealing head; the top sealing plate is sealed and connected to the upper end of the inner sleeve.

[0012] Optionally or preferably, it further includes an outer sleeve guide plate; the number of the outer sleeve guide plates is multiple; the multiple outer sleeve guide plates are divided into at least two layers and are arranged on the outside of the outer sleeve.

[0013] Optionally or preferably, it also includes an outer sleeve fixing plate; the outer sleeve fixing plate is arranged on the outer wall of the upper part of the outer sleeve, and the outer sleeve fixing plate fixes the outer sleeve to the outer shell.

[0014] Optionally or preferably, it also includes a support frame assembly; the support frame assembly is arranged in the cylinder body, and is used to mount the outer sleeve, the inner sleeve and the packing layer above the lower head.

[0015] Optionally or preferably, the upper end of the outer sleeve has a length of no less than 200 mm without a hole; the lower end of the outer sleeve has a length of no less than 80 mm without a hole; the upper end of the inner sleeve has a length of no less than 200 mm without a hole; the lower end of the inner sleeve has a length of no less than 80 mm without a hole.

[0016] Optionally or preferably, a catalyst loading port and a treatment tower inlet and outlet are provided on the top of the upper head.

[0017] Optionally or preferably, a central nozzle is provided in the inner sleeve; a packing layer nozzle is provided in the packing layer; a catalyst unloading hole and a flushing water inlet are opened at the bottom of the lower head; the flushing water inlet is used to introduce flushing water required by the central nozzle and the packing layer nozzle.

[0018] Optionally or preferably, the central nozzle is provided with a plurality of nozzles, and the plurality of nozzles can spray water to clean the inner sleeve at different heights; the packing layer nozzle includes a plurality of branch mother tubes tightly attached to the inner sleeve; the branch mother tube is provided with a plurality of branch pipes extending into the packing layer.

[0019] Based on the above technical solution, the following technical effects can be produced:

[0020] The utility model provides a blast furnace gas pretreatment tower, which can achieve better slag and sewage discharge in the tower and realize a structural type of lower air intake and upper air outlet, and can realize online or offline cleaning and regeneration while realizing dust removal and dechlorination of blast furnace gas, and at the same time realize effective purification pretreatment of blast furnace gas, reducing the impact of blast furnace gas on back-end catalysts and systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is the front view (cross-sectional view) of the utility model;

[0023] Figure 2 It is the main view (top view) of the utility model;

[0024] Description of the accompanying drawings:

[0025] 1-upper head, 2-cylinder, 3-lower head, 4-blast furnace gas outlet, 5-blast furnace gas inlet, 6-outer shell, 7-outer sleeve, 8-inner sleeve, 9-packing layer, 10-top sealing plate, 11-outer sleeve guide plate, 12-outer sleeve fixing plate, 13-support steel, 14-support plate, 15-catalyst charging port, 16-treatment tower inlet and outlet, 17-center nozzle, 18-packing layer nozzle, 19-nozzle, 20-branch mother pipe, 21-branch pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with 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 of the embodiments. In the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] In a preferred embodiment:

[0028] This embodiment provides a blast furnace gas pretreatment tower, such as Figure 1 and Figure 2 As shown, it includes an upper head 1, a cylinder 2, and a lower head 3 which are connected in sequence from top to bottom;

[0029] A blast furnace gas outlet 4 is provided at the top of the upper end cover 1; a blast furnace gas inlet 5 is provided at the bottom of the lower end cover 3;

[0030] The cylinder body 2 includes an outer shell 6, an outer sleeve 7, and an inner sleeve 8; the upper end and the lower end of the outer shell 6 are sealed and connected to the upper head 1 and the lower head 3 respectively; the outer sleeve 7 is arranged in the outer shell 6; the inner sleeve 8 is arranged in the outer sleeve 7; the side walls of the outer sleeve 7 and the inner sleeve 8 are both provided with air outlet holes;

[0031] A packing layer 9 is also provided between the outer sleeve 7 and the inner sleeve 8; the packing layer 9 is filled with a catalyst;

[0032] A top sealing plate 10 is provided inside the upper head 1 ; the top sealing plate 10 is sealedly connected to the upper end of the inner sleeve 8 .

[0033] Furthermore, in this embodiment, an outer sleeve guide plate 11 is included; the number of the outer sleeve guide plates 11 is multiple; the multiple outer sleeve guide plates 11 are divided into at least two layers, and are welded and fixed on the outside of the outer sleeve 7, so as to guide the coal gas evenly.

[0034] Furthermore, in this embodiment, an outer sleeve fixing plate 12 is also included; the outer sleeve fixing plate 12 is arranged on the outer wall of the upper part of the outer sleeve 7, and the outer sleeve fixing plate 12 fixes the outer sleeve 7 and the outer shell 6.

[0035] Furthermore, in this embodiment, a support frame assembly is also included; the support frame assembly is arranged in the cylinder 2, and is used to erect the outer sleeve 7, the inner sleeve 8 and the packing layer 9 above the lower head 3. Specifically, the support frame assembly includes a support steel 13 for lifting the outer sleeve 7, the inner sleeve 8 and the packing layer 9, and a support plate 14 welded and fixed to the bottom of the support steel and connected to the lower head 3; further, the number of the support frame assemblies is not less than 4, preferably 8, and in this embodiment, the 8 support frame assemblies evenly support the weight of the sleeve and the packing, and adjust the travel route of the gas.

[0036] Furthermore, in this embodiment, the upper end of the outer sleeve 7 has a length of no less than 200 mm without a hole; the lower end of the outer sleeve 7 has a length of no less than 80 mm without a hole; the upper end of the inner sleeve 8 has a length of no less than 200 mm without a hole; the lower end of the inner sleeve 8 has a length of no less than 80 mm without a hole, so as to facilitate welding and fixation.

[0037] Furthermore, in this embodiment, a catalyst loading port 15 and a treatment tower inlet and outlet 16 are provided at the top of the upper head 1; the number of the catalyst loading ports 15 is not less than 4; the catalyst loading port 15 is used to load the catalyst; the treatment tower inlet and outlet 16 is used for personnel to enter and exit, which facilitates the maintenance and overhaul of the treatment tower.

[0038] Furthermore, in this embodiment, a central nozzle 17 is provided in the inner sleeve 8; a packing layer nozzle 18 is provided in the packing layer 9; the central nozzle 17 is used to clean the inner sleeve 8; the packing layer nozzle is used to clean the packing layer 9; a catalyst unloading hole and a flushing water inlet are provided at the bottom of the lower head 3; the flushing water inlet is used to introduce the flushing water required by the central nozzle and the packing layer nozzle.

[0039] Furthermore, in this embodiment, the central nozzle 17 is provided with a plurality of nozzles 19, and the plurality of nozzles 19 can spray water to the inner sleeve 8 at different heights for cleaning; the packing layer nozzle 18 includes a plurality of branch mother pipes 20 close to the inner sleeve 8; the branch mother pipe 20 is provided with a plurality of branch pipes 21 extending into the packing layer 9. Specifically, the number of layers of the nozzles 19, the number of branch pipes and the height are determined according to the height of the treatment tower. In this embodiment, the number of nozzle layers is 3, the number of branch mother pipes is 4, and each branch mother pipe is provided with 2 branch pipes.

[0040] The working principle of the blast furnace gas pretreatment tower provided in this embodiment is as follows:

[0041] The blast furnace gas enters from the bottom of the pretreatment tower, enters the space of the inner sleeve 8, and then radially passes through the packing area 9 between the inner sleeve 8 and the outer sleeve 7. The space is filled with a catalyst. The blast furnace gas passes through the packing area 9 for dust removal and dechlorination, and then passes through the outer sleeve 9, collects into the space formed by the upper head 1 and the top sealing plate 10, and then is led out from the blast furnace gas outlet 4 at the top of the tower body. A central nozzle is provided in the inner sleeve of the tower body, and a packing area nozzle is provided in the packing area, which are used to clean the inner sleeve and the packing respectively.

[0042] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A blast furnace gas pretreatment tower, Features: The blast furnace gas pretreatment tower comprises an upper head, a cylinder and a lower head which are connected in sequence from top to bottom; The top of the upper end cover is provided with a blast furnace gas outlet; the bottom of the lower end cover is provided with a blast furnace gas inlet; The cylinder body comprises an outer shell, an outer sleeve and an inner sleeve; the upper end and the lower end of the outer shell are respectively sealed and connected with the upper head and the lower head; the outer sleeve is arranged in the outer shell; the inner sleeve is arranged in the outer sleeve; the side walls of the outer sleeve and the inner sleeve are both provided with air outlet holes; A packing layer is provided between the outer sleeve and the inner sleeve; the packing layer is filled with a catalyst; A top sealing plate is arranged inside the upper sealing head; the top sealing plate is sealed and connected to the upper end of the inner sleeve.

2. A blast furnace gas pretreatment tower according to claim 1, Features: It also includes an outer sleeve guide plate; the number of the outer sleeve guide plates is multiple; the multiple outer sleeve guide plates are divided into at least two layers and are arranged on the outside of the outer sleeve.

3. A blast furnace gas pretreatment tower according to claim 1, Features: It also includes an outer sleeve fixing plate; the outer sleeve fixing plate is arranged on the outer wall of the upper part of the outer sleeve, and the outer sleeve fixing plate fixes the outer sleeve and the outer shell.

4. A blast furnace gas pretreatment tower according to claim 1, Features: It also includes a support frame assembly; the support frame assembly is arranged in the cylinder body and is used to mount the outer sleeve, the inner sleeve and the packing layer above the lower head.

5. A blast furnace gas pretreatment tower according to claim 1, Features: The upper end of the outer sleeve has a length of no less than 200 mm without a hole; the lower end of the outer sleeve has a length of no less than 80 mm without a hole; the upper end of the inner sleeve has a length of no less than 200 mm without a hole; the lower end of the inner sleeve has a length of no less than 80 mm without a hole.

6. A blast furnace gas pretreatment tower according to claim 1, Features: A catalyst loading port and a treatment tower inlet and outlet are provided on the top of the upper end cap.

7. A blast furnace gas pretreatment tower according to claim 1, Features: A central nozzle is arranged in the inner sleeve; a packing layer nozzle is arranged in the packing layer; a catalyst unloading hole and a flushing water inlet are opened at the bottom of the lower head; the flushing water inlet is used to introduce flushing water required by the central nozzle and the packing layer nozzle.

8. A blast furnace gas pretreatment tower according to claim 7, Features: The central nozzle is provided with a plurality of nozzles, which can spray water to clean the inner sleeve at different heights; the packing layer nozzle includes a plurality of branch mother pipes close to the inner sleeve; the branch mother pipe is provided with a plurality of branch pipes extending into the packing layer.

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