CN205048163U - Prevent excessive heating furnace gas piping waste fitting discharging of coal gas - Google Patents

Abstract

The utility model relates to a prevent excessive heating furnace gas piping waste fitting discharging of coal gas, waste fitting discharging be connected with first blowoff valve (2), first connecting tube (3), second blowoff valve (4), second connecting tube (5), third connecting tube (7), fourth connecting tube (9), third blowoff valve (10), the 5th connecting tube (11), fourth blowoff valve (12) and blow off pipe (13) in order in gas piping (1) export, third connecting tube (7) and fourth connecting tube (9) between connect through a U type water seal (8), second connecting tube (5) and third connecting tube (7) between install direct sight glass (6). Preventing effectively that coal gas is excessive, avoiding the personnel to take place gas suffocation, ensure operation personnel's safety, when solving present dry -type excretion machine drainage operation, it is excessive to take place coal gas, leads to the operation personnel to take place gas suffocation, threatens the problem of operation personal security.

Description

A heating furnace gas pipeline blowdown device for preventing gas overflow

technical field

The utility model relates to the technical field of gas systems, in particular to a heating furnace gas pipeline blowdown device for preventing gas overflow.

Background technique

Equipment such as heating furnaces in iron and steel plants use mixed gas as the combustion medium. Mixed gas is coke oven, converter and blast furnace gas produced by steel mills in the process of ironmaking and steel smelting. These gases will still contain water, tar, phenols and other substances after filtration. When the ambient temperature changes, the phenol-containing water vapor will become condensate and accumulate at the bottom of the gas pipeline. If the condensate is not discharged regularly, it will affect the transportation of gas. At the bottom, gas drainage sealed tanks are installed at regular intervals to discharge the condensate continuously.

However, due to the low content of phenolic water in the end-user pipelines such as heating furnaces, and the pungent smell of tar, phenols and other substances, it is not suitable for continuous open discharge in the factory building, and the gas drainage sealed tank is bulky, so it is not suitable for use in the workshop. It is installed in the factory building. Therefore, the sewage discharge of the gas pipeline of the indoor heating furnace in the factory building is generally solved by a dry sewage discharger with a simple installation structure. As shown in Figure 1, the sewage discharge method is regular discharge.

The disadvantage of this traditional dry sewage drainer is that the operator cannot grasp the accurate emptying time of the condensate in the process of draining the gas pipeline, so as to close the drain valve in time. In addition, the condensate discharged together with the condensate A small amount of gas cannot be blocked and will be discharged into the atmosphere, affecting the safety of operating personnel.

Utility model content

The purpose of this utility model is to provide a heating furnace gas pipeline blowdown device that prevents gas from overflowing. The blowdown device adopts a fully sealed structure that combines valves, straight-through mirrors and U-shaped water seals to realize the cleaning of the heating furnace gas pipeline. The effective monitoring of the entire operation process during the drainage operation prevents gas from overflowing, and reliably cuts off the gas during non-operation to avoid gas poisoning and ensure the safety of the operating personnel. Gas sometimes overflows, causing gas poisoning to workers and threatening the safety of workers.

In order to achieve the above object, the solution of the present utility model is: a heating furnace gas pipeline blowdown device for preventing gas overflow, said blowdown device is connected with a first blowdown valve (2) and a second blowdown valve (2) at the outlet of the gas pipeline (1) in sequence. One connecting pipe (3), the second blowdown valve (4), the second connecting pipe (5), the third connecting pipe (7), the fourth connecting pipe (9), the third blowdown valve (10), the fifth connecting pipe Pipeline (11), fourth blowdown valve (12) and blowdown pipe (13), the third connection pipe (7) and the fourth connection pipe (9) are connected through the first U-shaped water seal (8) , A straight-through mirror (6) is installed between the second connecting pipe (5) and the third connecting pipe (7), and a glass observation hole is arranged on the straight-through mirror (6).

According to the sewage discharge device for heating furnace gas pipelines for preventing gas overflow described in the utility model, the fourth connecting pipeline (9) is provided with at least one second U-shaped water seal.

According to the heating furnace gas pipeline blowdown device for preventing gas overflow described in the utility model, the connection between each connecting pipe and each blowdown valve adopts the connection mode of flanges and bolts and nuts.

According to the heating furnace gas pipe blowdown device for preventing gas overflow described in the utility model, the second connecting pipe (5) and the third connecting pipe (7) are connected to the straight-through sight glass (6) through flanges and bolts and nuts.

According to the heating furnace gas pipeline sewage device for preventing gas overflow described in the present invention, the head end of the first U-shaped water seal (8) is connected to the third connecting pipeline (7) by welding, and the first U The tail end of the type water seal (8) is connected to the fourth connection pipeline (9) by welding.

The beneficial effects achieved by the utility model: the sewage discharge device of the utility model adopts a full-seal structure combining a valve, a straight-through mirror and a U-shaped water seal, which can effectively monitor and control the entire operation process when the gas pipeline is drained. To prevent gas from overflowing, and to reliably cut off gas during non-operation, to avoid gas poisoning and ensure the safety of operators, it is suitable for popularization and application on various medium and low pressure gas pipelines that adopt regular discharge of sewage. The structure is simple and easy to use. Convenient, safe and reliable.

Description of drawings

Fig. 1 is the structural representation of existing dry type blowdown device;

Fig. 2 is a structural schematic diagram of the sewage discharge device of the present invention.

In the figure, the gas pipeline 1, the first blowdown valve 2, the first connecting pipe 3, the second blowdown valve 4, the second connecting pipe 5, the straight-through mirror 6, the third connecting pipe 7, the first U-shaped water seal 8, The fourth connecting pipe 9, the third blowdown valve 10, the fifth connecting pipe 11, the fourth blowdown valve 12, and the blowdown pipe 13.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

This application adopts the design scheme of combining valves, straight-through sight glass and U-shaped water seal. First, the principle of using the straight-through sight glass to observe the flow of liquid flow can realize the monitoring of the entire drainage operation process when the gas pipeline is drained. In this way, the accurate condensate emptying time can be mastered, and the drain valve can be closed in time to effectively protect the operation safety.

Secondly, through the principle that water can be stored in the U-shaped water seal chamber, and the water storage has a certain ability to absorb gas pressure shocks, a small amount of gas mixed in the condensate is sealed in front of the U-shaped water seal to avoid gas generation Spilled into the air, preventing gas poisoning of workers.

In addition, the method of installing a valve at the outlet of the U-shaped water seal ensures that the water stored in the U-shaped water seal can be stored in the U-shaped water seal cavity for a long time without being evaporated. The combination of the valve and the U-shaped water seal guarantees Reliable cut-off of gas during non-working hours.

Example:

As shown in Figure 2, the sewage discharge device of the present application is installed at the lowest point of the gas pipeline, and the first sewage valve 2 is installed behind the gas pipeline 1, and the first connecting pipeline 3 is installed behind the first sewage valve 2, and the first connection A second drain valve 4 is installed behind the pipeline 3, a second connecting pipe 5 is installed behind the second drain valve 4, a straight-through sight glass 6 is installed behind the second connecting pipe 5, and a third connection is installed behind the straight-through sight glass 6. Pipeline 7, the first U-shaped water seal 8 is installed behind the third connecting pipe 7, the fourth connecting pipe 9 is installed behind the first U-shaped water seal 8, and the fourth connecting pipe 9 can be installed as required One or n second U-shaped water seals, the third drain valve 10 is installed after the fourth connecting pipe 9, the fifth connecting pipe 11 is installed behind the third drain valve 10, and the fifth connecting pipe 11 is installed behind the fifth connecting pipe 11 A fourth blowdown valve 12 is installed, and a blowdown pipe 13 is installed behind the fourth blowdown valve 12 .

The straight-through sight glass of this embodiment is provided with a glass observation hole, the connection between each connecting pipe and each blowdown valve adopts the connection mode of flange and bolt nut, and the connection between each connecting pipe and the straight-through sight glass also adopts flange and bolt As for the connection mode of the nut, the connection between each connecting pipe and the first and second U-shaped water seals adopts a welding connection mode.

In this embodiment, the installation of one or n second U-shaped water seals is determined by the normal working pressure of the gas pipeline, and the cumulative height of the second U-shaped water seals must be at least 1 times the normal working pressure. According to the amount of phenol-containing condensate produced in the gas pipeline, select the gas pipeline, sewage valve, straight-through sight glass, U-shaped water seal and sewage pipe with corresponding diameters.

The process of this application in use is as follows: when preparing for drainage operation, the first step is to check and confirm that the third blowdown valve 10 and the fourth blowdown valve 12 are closed; the second step is to open the first blowdown valve 2 and the second blowdown valve 4 ; In the third step, after seeing that the through-view mirror is full of condensate through the glass observation hole on the through-view mirror, slowly open the third drain valve 10 and the fourth drain valve 12 to discharge water; When the glass observation hole on the sight glass sees that the condensate liquid level in the straight-through sight glass is lower than about one-third of the diameter of the straight-through sight glass, close the first drain valve 2 and the second drain valve 4; the fifth step is to close the second drain valve Three blowdown valves 10 and the fourth blowdown valve 12 complete the whole drainage operation.

The sewage device of the utility model adopts a fully sealed structure combining a valve, a straight-through sight glass and a U-shaped water seal, which can effectively monitor the entire operation process of the gas pipeline when it is drained and prevent the gas from overflowing, and achieve non-toxicity. Reliable cut-off of gas during operation avoids gas poisoning of personnel and ensures the safety of operators. It is suitable for popularization and application on various medium and low-pressure gas pipelines that use regular discharge of sewage. It has a simple structure, is easy to use, and is safe and reliable.

Claims (5)

1. the oven gas pipe line drainage device preventing coal gas excessive, it is characterized in that: described drainage device is connected with the first blowdown valve (2) in turn in gas pipe line (1) outlet, first connecting tube (3), second blowdown valve (4), second connecting tube (5), 3rd connecting tube (7), 4th connecting tube (9), 3rd blowdown valve (10), 5th connecting tube (11), 4th blowdown valve (12) and drain pipe (13), connected by the first U-shaped water seal (8) between the 3rd described connecting tube (7) and the 4th connecting tube (9), between described the second connecting tube (5) and the 3rd connecting tube (7), straight-through sight glass (6) is installed, described straight-through sight glass (6) is provided with glass peephole.

2. the oven gas pipe line drainage device preventing coal gas excessive according to claim 1, is characterized in that, the 4th described connecting tube (9) is provided with at least one the second U-shaped water seal.

3. the oven gas pipe line drainage device preventing coal gas excessive according to claim 1, it is characterized in that, the connection between each connecting tube and each blowdown valve adopts the Placement of flange and bolt and nut.

4. the oven gas pipe line drainage device preventing coal gas excessive according to claim 1, it is characterized in that, the second connecting tube (5) is all connected with straight-through sight glass (6) with bolt and nut by flange with the 3rd connecting tube (7).

5. the oven gas pipe line drainage device preventing coal gas excessive according to claim 1, it is characterized in that, the head end of described first U-shaped water seal (8) connects the 3rd connecting tube (7) by the mode of welding, and the tail end of described first U-shaped water seal (8) connects the 4th connecting tube (9) by the mode of welding.