Soot blowing system of wax oil catalysis waste heat boiler

Abstract

A soot blowing system of a wax oil catalysis waste heat boiler comprises an air supply pipeline, a soot blower module and a soot blower lifting valve module, and the soot blower module is formed by connecting a plurality of soot blowers in series or in parallel; the soot blower lifting valve module is formed by connecting a plurality of soot blower lifting valves in series or in parallel; the soot blower module and the soot blower lifting valve module are arranged in parallel, the soot blower lifting valve module is arranged above the soot blower module in parallel, and the air supply pipeline is connected to a middle point of a connecting pipeline between the soot blower module and the soot blower lifting valve module which are arranged in parallel. The air supply pressure of the upper portion and the lower portion is stable, the air supply mode is changed into the mode that double fans supply air together, and when a single fan breaks down, the single fan can supply air. Meanwhile, branch lines entering each sealing point are controlled by a single-hand valve and a pressure gauge, according to display of the pressure gauge on site, it is guaranteed that the wind pressure of each sealing branch line is the same, the reverse channeling phenomenon is prevented, the soot blower and the lifting valve elbow at the reverse channeling position are changed into metal hoses from carbon steel, and dew point corrosion caused by long-term accumulation of condensate water is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of sootblower systems for waste heat boilers of oil refining and chemical industry devices, in particular to a sootblowing system for a wax oil catalytic waste heat boiler. Background Art

[0002] In the waste heat boiler sootblower system of the oil refining and chemical plant, the lifting valve of the semi-telescopic and rake sootblower system is supplied by a sealing air fan, which is distributed to the gun barrels of each sootblower through the sealing air to ensure that there is no flue gas backflow. The original design of the waste heat boiler sootblower sealing air is a single fan for all points of sealing backblowing. Since the bottom sealing pressure drop is less than the top pressure drop, most of the sealing air is backblown into the waste boiler from the bottom low pressure drop area, and the air volume at the top is small, causing the flue gas to backflow and generate condensed water, salts and other substances to corrode the sootblower and lifting valve, affecting the normal use of the sootblower and unable to operate for a long period of time. Summary of the invention

[0003] In order to solve the technical defects in the prior art, the utility model provides a wax oil catalytic waste heat boiler soot blowing system.

[0004] The technical solution adopted by the utility model is: the wax oil catalytic waste heat boiler soot blowing system includes an air supply pipeline and also includes:

[0005] A sootblower module, wherein the sootblower module is composed of a plurality of sootblowers connected in series or in parallel;

[0006] A sootblower lift valve module, wherein the sootblower lift valve module is composed of a plurality of sootblower lift valves connected in series or in parallel;

[0007] The sootblower module and the sootblower lifting valve module are arranged in parallel, the sootblower lifting valve module is arranged in parallel above the sootblower module, and the air supply pipeline is connected to the middle point of the connecting pipeline between the sootblower module and the sootblower lifting valve module arranged in parallel.

[0008] The air inlet end of the air supply pipeline is provided with a double-fan air supply device.

[0009] A single-hand valve and a pressure gauge are provided at the inlet of each branch line of the sootblower module and the sootblower lifting valve module.

[0010] The soot blower module comprises a long telescopic soot blower or a semi-telescopic soot blower.

[0011] The sealing air connection of the long telescopic soot blower or the semi-telescopic soot blower is connected by a metal hose.

[0012] The elbow of the sootblower lifting valve is connected by a metal hose.

[0013] The beneficial effects of the utility model are as follows: the utility model provides a wax oil catalytic waste heat boiler soot blowing system, including an air supply pipeline, a soot blower module and a soot blower lifting valve module, the soot blower module is composed of a plurality of soot blowers arranged in series or in parallel; the soot blower lifting valve module is composed of a plurality of soot blower lifting valves arranged in series or in parallel; the soot blower module and the soot blower lifting valve module are arranged in parallel, the soot blower lifting valve module is arranged in parallel above the soot blower module, the air supply pipeline is connected to the middle point of the connecting pipeline between the soot blower module and the soot blower lifting valve module arranged in parallel, the air supply through the bottom of the waste heat boiler soot blower is changed to the middle air supply, to ensure the stability of the upper and lower air supply pressures, and the air supply mode is changed to dual fans common air supply, and a single fan can supply air when a single fan fails. At the same time, the branch lines entering each sealing point are changed to single-hand valve and pressure gauge control. According to the on-site pressure gauge display, the wind pressure of each sealed branch line is guaranteed to be the same to prevent backflow. The soot blower and lifting valve elbow at the backflow location are changed from carbon steel to metal hose to prevent long-term accumulation of condensed water and dew point corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the sealing wind installation method of the long telescopic soot blower of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the sealing wind installation method of the semi-retractable soot blower of the utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the sealing air installation method of the sootblower lifting valve of the utility model.

[0018] Figure 5 This is a schematic diagram of the structure of an existing sootblowing system.

[0019] Among them, 1-air supply pipeline, 2-soot blower module, 3-soot blower lifting valve module, 4-connecting pipeline, 5-dual fan air supply device, 6-single hand valve, 7-pressure gauge, 8-metal hose, 21-soot blower, 31-soot blower lifting valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions 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. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] A wax oil catalytic waste heat boiler soot blowing system comprises an air supply pipeline (1), and also comprises a soot blower module (2), wherein the soot blower module (2) is composed of a plurality of soot blowers (21) arranged in series or in parallel; a soot blower lift valve module (3), wherein the soot blower lift valve module (3) is composed of a plurality of soot blower lift valves (31) arranged in series or in parallel; the soot blower module (2) and the soot blower lift valve module (3) are arranged in parallel, and the soot blower lift valve module (3) is arranged in parallel above the soot blower module (2); the air supply pipeline (1) is connected to the middle point of the connecting pipeline (4) between the soot blower module (2) and the soot blower lift valve module (3) arranged in parallel. The air supply from the bottom of the waste heat boiler soot blower is changed to the middle air supply to ensure the stability of the upper and lower air supply pressures, and the air inlet end of the air supply pipeline (1) is provided with a double fan air supply device (5). By changing the air supply mode to dual fans supplying air together, a single fan can supply air when a single fan fails.

[0022] A single-hand valve (6) and a pressure gauge (7) are provided at the inlet of each branch line of the sootblower module (2) and the sootblower lifting valve module (3) to ensure that the wind pressure of each sealed branch line is the same, thereby preventing the occurrence of backflow.

[0023] The soot blower module (2) comprises a long telescopic soot blower or a semi-telescopic soot blower.

[0024] The sealing air connection of the long telescopic sootblower or the semi-telescopic sootblower is connected by a metal hose (8). The elbow of the sootblower lifting valve (31) is connected by a metal hose (8). By changing the sootblower and lifting valve elbows at the backflowing part from carbon steel to metal hoses, the dew point corrosion caused by long-term accumulation of condensed water is prevented.

[0025] Effects of the utility model 1. Solve the problem of sulfur-containing flue gas flowing back into the gun barrel, lifting valve and steam line causing corrosion. According to the annual maintenance cost before the transformation, the material cost and maintenance cost caused by flue gas dew point corrosion can be saved by about 800,000 yuan per year. 2. Solve the long cycle problem of soot blower and waste heat boiler, reduce the time for equipment downtime maintenance, and at the same time, the heat intake of waste heat boiler increases the high-pressure steam output by about 4t / h. After the use of the utility model, the maintenance cycle is extended from 10 months to 2 years.

[0026] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent.

[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A wax oil catalytic waste heat boiler soot blowing system, comprising an air supply pipeline (1), characterized in that: Also includes: A soot blower module (2), wherein the soot blower module (2) is composed of a plurality of soot blowers (21) connected in series or in parallel; A sootblower lifting valve module (3), wherein the sootblower lifting valve module (3) is composed of a plurality of sootblower lifting valves (31) connected in series or in parallel; The sootblower module (2) and the sootblower lifting valve module (3) are arranged in parallel, the sootblower lifting valve module (3) is arranged in parallel above the sootblower module (2), and the air supply pipeline (1) is connected to the middle point of the connecting pipeline (4) between the sootblower module (2) and the sootblower lifting valve module (3) arranged in parallel.

2. The wax oil catalytic waste heat boiler soot blowing system according to claim 1 is characterized in that: The air supply pipeline (1) is provided with a dual-fan air supply device (5) at the air inlet end.

3. The wax oil catalytic waste heat boiler soot blowing system according to claim 1, characterized in that: A single-hand valve (6) and a pressure gauge (7) are provided at the inlet of the branch line of each sootblower module (2) and sootblower lifting valve module (3).

4. The wax oil catalytic waste heat boiler soot blowing system according to claim 1, characterized in that: The soot blower module (2) comprises a long telescopic soot blower or a semi-telescopic soot blower.

5. The wax oil catalytic waste heat boiler soot blowing system according to claim 4 is characterized in that: The sealed air connection of the long telescopic soot blower or the semi-telescopic soot blower is connected by a metal hose (8).

6. The wax oil catalytic waste heat boiler soot blowing system according to claim 1, characterized in that: The elbow of the sootblower lifting valve (31) is connected by a metal hose (8).

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