CN216244395U

CN216244395U - Device for recovering low-pressure steam waste heat

Info

Publication number: CN216244395U
Application number: CN202123038264.0U
Authority: CN
Inventors: 付开全; 朱永志; 杨通山; 牟国春; 易昌国; 张春练
Original assignee: Guizhou Chitianhua Tongzi Chemical Co ltd
Current assignee: Guizhou Chitianhua Tongzi Chemical Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-04-08
Anticipated expiration: 2031-12-06

Abstract

The utility model discloses a device for recovering low-pressure steam waste heat, which comprises a gas hot-blast stove and an air heater, wherein an air suction inlet of the air heater is communicated with the atmosphere, an inlet of the air heater is connected with a low-pressure steam waste heat discharge pipeline of a factory area, and an outlet of the air heater is connected with a hearth of the gas hot-blast stove through a secondary fan; the air is heated to above 100 ℃ by utilizing low-pressure steam from an industrial device and then enters the hot blast stove, and the consumption of required fuel gas is reduced by about 1/3. Meanwhile, the air heater is provided with the auxiliary line air door, and the air quantity of the fan is adjusted by adopting a motor frequency conversion technology, so that different hot air temperature and air quantity requirements can be flexibly met.

Description

Device for recovering low-pressure steam waste heat

Technical Field

The utility model belongs to the technical field of industrial waste heat recycling and hot blast stoves, and particularly relates to a device for recycling low-pressure steam waste heat.

Background

The surplus low-pressure waste heat steam is often generated in industrial production, the utilization value is low, and the problems of low efficiency and large investment exist when the waste heat steam is used for expansion power generation. Meanwhile, the secondary air sucked by the gas hot blast stove is normal temperature air which needs to be heated to about 300 ℃ in the hot blast stove, and the fuel gas is expensive and high in cost, so that the secondary air is heated by utilizing surplus low-pressure steam in a heat dissipation area of a plant area and then is sent into the hot blast stove, and the effects of recovering waste heat and reducing fuel gas consumption can be achieved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a device for recovering low-pressure steam waste heat, which utilizes the low-pressure steam waste heat to heat secondary air of a gas hot blast stove so as to achieve the effects of recovering the steam waste heat and reducing the gas consumption.

The technical scheme of the utility model is as follows:

the utility model provides a retrieve device of low pressure steam waste heat, it includes gas hot-blast furnace, air heater, and the air heater inlet scoop is linked together with the atmosphere, and the air heater entry links to each other with factory low pressure steam waste heat discharge pipeline, and the air heater export is connected with the furnace of gas hot-blast furnace through secondary air fan.

The air heater adopts a finned heat exchanger, a low-pressure steam waste heat discharge pipeline is connected with the pipe side of the air heater, and the shell side of the air heater is communicated with the atmosphere.

The low-pressure steam waste heat discharge pipeline is provided with an automatic steam trap.

The air inlet of the air heater is provided with a secondary air door.

The secondary fan adopts a frequency conversion regulation mode.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model comprises a gas hot-blast stove, an air heater, a variable frequency regulation secondary fan and a variable frequency regulation hot-blast fan, wherein the inlet of the air heater is connected with the atmosphere, the outlet of the air heater is connected with the inlet of the secondary fan, the outlet of the secondary fan is connected with the hearth of the hot-blast stove, and the inlet of the hot-blast fan is connected with the air outlet of the hot-blast stove. Meanwhile, the air heater is provided with the auxiliary line air door, and the air quantity of the fan is adjusted by adopting a motor frequency conversion technology, so that different hot air temperature and air quantity requirements can be flexibly met.

Drawings

FIG. 1 is a schematic process flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1. as shown in figure 1: the utility model provides a retrieve device of low pressure steam waste heat, it includes gas hot-blast furnace 1, air heater 2, gas hot-blast furnace 1 is a neotype shell and tube high temperature heat recovery unit, can extensively be used for metallurgy, machinery, the building materials, trades such as chemical industry, the high temperature flue gas waste heat of the various industrial kilns of direct recovery emission, in order to obtain high temperature combustion-supporting air or process gas, 2 inlet scoop of air heater are linked together with the atmosphere, in order to provide the air that needs the heating to

air heater

2, 2 entries of air heater link to each other with low pressure steam waste heat discharge pipeline, 2 air outlets of air heater are connected with the furnace of gas hot-blast furnace 1 through secondary fan 3 and are connected, 1 air outlet of gas hot-blast furnace and 4 entries of air heater are connected.

Embodiment 2. the heating medium of the air heater 2 is the low-pressure steam waste heat that the factory is rich, the air heater 2 entrance links with low-pressure steam waste heat discharge pipeline of the factory, the air heater 2 retrieves the low-pressure steam waste heat that the industrial installation of factory has heat to the container body through the pipeline, the air intake of the container body of the heater 2 sucks the atmospheric air to mix with heating medium, heat to above 100 degrees centigrade, and then convey to the gas hot-blast furnace 1 cavity through the secondary air blower 3, the necessary fuel gas consumption drops about 1/3.

Embodiment 3. the air heater 2 adopts the finned heat exchanger, the finned heat exchanger can increase its heat exchange area, the larger the heat exchange area is, the higher the heat conversion rate is, the better the energy-conserving effect of the hot-blast furnace is; the low-pressure steam waste heat discharge pipeline is connected with the pipe side of the low-pressure steam waste heat discharge pipeline, the shell side of the low-pressure steam waste heat discharge pipeline is communicated with the atmosphere, an air suction port of the air heater 2 is provided with a secondary air door, and the secondary fan 3 and the air heater 4 both adopt a variable frequency regulation mode to regulate the air quantity of the fans, so that different hot air temperature and air quantity requirements can be flexibly met; because the cold air can be condensed into water drops when meeting the hot air, the heating efficiency of the heater 2 can be influenced, and an automatic steam trap is arranged on the low-pressure steam waste heat discharge pipeline to remove the condensed water drops.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model.

Claims

1. The utility model provides a retrieve device of low pressure steam waste heat, it includes gas hot-blast furnace (1), air heater (2), its characterized in that: the air suction inlet of the air heater (2) is communicated with the atmosphere, the inlet of the air heater (2) is connected with a low-pressure steam waste heat discharge pipeline of a factory, and the outlet of the air heater (2) is connected with a hearth of the gas hot blast stove (1) through a secondary fan (3).

2. The device for recovering the waste heat of the low-pressure steam as in claim 1, wherein: the air heater (2) is a finned heat exchanger, the low-pressure steam waste heat discharge pipeline is connected with the pipe side of the low-pressure steam waste heat discharge pipeline, and the shell side of the low-pressure steam waste heat discharge pipeline is communicated with the atmosphere.

3. The device for recovering the waste heat of the low-pressure steam as in claim 2, wherein: and an automatic steam trap is arranged on the low-pressure steam waste heat discharge pipeline.

4. The device for recovering the waste heat of the low-pressure steam as in claim 2, wherein: and an air suction opening of the air heater (2) is provided with a secondary air door.

5. The device for recovering the residual heat of the low-pressure steam according to any one of claims 1 to 4, characterized in that: the secondary fan (3) adopts a frequency conversion regulation mode.