CN203869076U - Device for protecting gas heat exchanger - Google Patents

Abstract

A device for protecting a gas heat exchanger. A U-shaped pipeline is installed on the inlet pipeline and the gas outlet pipeline of the heat exchanger, and valves are respectively installed on the top and bottom pipelines of the heat exchanger. Valves are also added at both ends of the U-shaped pipeline connected to the top and bottom. Compared with the existing technology, the beneficial effects of the utility model are: 1) avoiding the occurrence of gas leakage caused by leaks in the heat exchanger, thereby reducing the downtime of accidents. 2) Avoid harmful substances such as coal tar in the coke oven gas, which will adhere to the valve flap after preheating, causing damage to the valve and improving the service life of the valve. 3) The economic benefits are indirectly improved, and the maintenance time and maintenance or replacement costs are eliminated.

Description

A device for protecting gas heat exchanger

technical field

The utility model relates to the field of heat exchangers, in particular to a device for protecting a gas heat exchanger.

Background technique

In actual production, since the thick plate part heating furnace uses mixed gas, the mixed gas needs to be preheated by a heat exchanger before entering the furnace for combustion. The original device has two problems: the first point is that when there is a leak in the heat exchanger, the preheated mixed gas will leak from the leak point, which poses a serious safety hazard; the second point is that when coke oven gas is used, the coke Harmful substances such as coal tar contained in the furnace gas will corrode the heat exchanger and valves after preheating, which will not only cause safety hazards but also cause equipment damage, which will bring economic losses and cause waste.

Contents of the invention

The purpose of this utility model is to provide a device for protecting the gas heat exchanger. A U-shaped pipeline is arranged on the inlet pipeline and the gas outlet pipeline of the heat exchanger, and the pipelines on the top and bottom of the heat exchanger are respectively arranged Valves are also provided at both ends of the U-shaped pipeline connected to the top and bottom of the heat exchanger. It not only eliminates potential safety hazards, but also protects the heat exchanger and improves the service life of the heat exchanger.

In order to achieve the above object, the utility model adopts the following technical solutions:

A device for protecting a gas heat exchanger, including a U-shaped pipeline and a valve. The valves are divided into valve one, valve two, valve three, and valve four. , Valve 2 is set at the gas outlet of the pipeline at the bottom of the heat exchanger, valve 3 and valve 4 are set on the U-shaped pipeline, valve 3 is set at one end of the U-shaped pipeline connected to the pipeline where valve 1 is located, and valve 4 is set at One end of the U-shaped pipeline connected to the pipeline where the valve 2 is located.

Compared with the prior art, the beneficial effects of the utility model are:

1) It avoids the occurrence of gas leakage due to leaks in the heat exchanger, thereby reducing the downtime due to accidents.

2) Avoid harmful substances such as coal tar in coke oven gas, which will adhere to the valve flap after preheating, causing damage to the valve and improving the service life of the valve.

3) Economic benefits are indirectly improved, and maintenance time and maintenance or replacement costs are eliminated.

Description of drawings

Fig. 1 is a structural diagram of the protection gas heat exchanger device of the utility model.

Figure 2 is the effect diagram before using the protective gas heat exchanger device.

1-U-shaped pipeline 2-Valve 1 3-Valve 2 4-Valve 3 5-Valve 4 6-Heat exchanger

Detailed ways

The specific embodiment of the utility model is further described below in conjunction with accompanying drawing:

As shown in Figure 1, a device for protecting the gas heat exchanger is composed of U-shaped pipeline 1, valve 1 2, valve 2 3, valve 3 4 and valve 4 5, and valve 1 2 is set on the heat exchanger 6 At the air inlet of the top pipeline, the valve 2 3 is set at the gas outlet at the bottom of the heat exchanger 6, the valve 3 4 and valve 4 5 are set on the U-shaped pipeline 1, and the valve 3 4 is set on the pipeline with the valve 1 2 One end of the connected U-shaped pipeline 1, the valve four 5 is arranged on the other end of the U-shaped pipeline 1 connected to the pipeline where the valve two 3 is located.

During normal production, open valve 1 2 and valve 2 3, close valve 3 4 and valve 4 5 on U-shaped pipeline 1, the gas enters the heat exchanger in direction A, and the gas enters from the top pipeline of the heat exchanger before preheating After passing through the heat exchanger 6, it becomes preheated gas. When a failure occurs, it can be flexibly adjusted in the following ways:

Example 1:

When there is a leak in the heat exchanger

When there is a leak in the heat exchanger, close the valve 1 2 and valve 2 3 of the pipeline at the top and bottom of the heat exchanger, open the valve 3 4 and valve 4 5 of the side-connected U-shaped pipeline, and the mixed gas passes through the branch pipeline. Follow B direction to enter the heating furnace, thereby reducing accidental downtime.

Example 2:

use coke oven gas

The harmful substance coal tar in the coke oven gas is preheated by the heat exchanger 6, and coke adheres to the flap of the valve, which affects the use of the valve. Therefore, when coke oven gas is used, valve one 2 at the top of the heat exchanger 6 and valve two 3 at the bottom can be closed, valve three 4 and valve four 5 next to the U-shaped pipeline can be opened, and the coke oven gas passes through the U-shaped pipeline 1, Enter the heating furnace according to the B direction, so as to protect the valve flap and improve the service life of the valve.

Claims (1)

1. a device of protecting gas change heater; comprise U-shaped pipeline, valve; it is characterized in that; described valve is divided into valve one, valve two, valve three, valve four; valve one is arranged on pipeline air inlet place, heat exchanger top; valve two is arranged on place, pipeline gas outlet, heat exchanger bottom; valve three, valve four are arranged on U-shaped pipeline; valve three is arranged on one end of the U-shaped pipeline being connected with valve one place pipeline, and valve four is arranged on the other end of the U-shaped pipeline being connected with valve two place pipelines.