CN219453913U - Steam utilization system of gas stove - Google Patents

Abstract

The utility model discloses a gas furnace steam utilization system, which comprises a gas furnace group consisting of a plurality of gas furnaces, wherein a primary heat exchanger, a secondary heat exchanger and a tertiary heat exchanger are sequentially connected to gas pipes of the gas furnace group, a low-temperature gas pipe is arranged on the tertiary heat exchanger, a heat exchange water inlet pipe, an emptying pipeline of low-pressure steam and a circulating pipe returning to the primary heat exchanger are arranged on the secondary heat exchanger, a low-pressure steam conveying pipe is arranged on the secondary heat exchanger, the low-pressure steam conveying pipe is respectively connected with a causticizing tank, an evaporation raw liquid preheating sleeve and a hot water tank group through branch pipes, and air valves are arranged on the branch pipes, the connecting pipes and the emptying pipeline; the utility model can utilize low-pressure steam generated in the heat exchange and cooling process of the gas furnace, and is beneficial to energy conservation and emission reduction in the alumina production process.

Description

Steam utilization system of gas stove

Technical Field

The utility model relates to a gas furnace steam utilization system, and belongs to the technical field of low-pressure steam application after secondary heat exchange of a gas furnace.

Background

Existing alumina processes use steam in two grades, one of which is high pressure steam: 6.1MPa; secondly, low-pressure steam is 0.6MPa; and steam is generated in the secondary heat exchange and cooling process of the gas furnace, and the pressure of the steam is as follows: 0.2-0.25MPa, part of the mixture is used for a gas furnace, and the rest part of the mixture cannot be used for an alumina process due to insufficient pressure, so that the mixture is emptied; this undoubtedly results in a waste of energy for this evacuation of part of the low pressure steam.

In the prior art, if the low-pressure steam of the emptied gas furnace is needed to be utilized, the gas furnace is newly designed or equipment is added to generate 0.6MPa steam with higher pressure, and the steam is conveyed to an alumina low-pressure steam system except for the self use of the gas furnace; however, the existing gas furnaces can be modified, but are limited to space, are generally difficult to implement and are finally emptied.

Namely: the gas furnace steam utilization system is capable of utilizing low-pressure steam generated in the heat exchange and cooling process of the gas furnace, and is beneficial to energy conservation and emission reduction in the alumina production process.

Disclosure of Invention

Therefore, the utility model aims to provide a gas furnace steam utilization system which can utilize low-pressure steam generated in the heat exchange and cooling process of the gas furnace, thereby being beneficial to energy conservation and emission reduction in the production process of alumina; can overcome the defects of the prior art.

The utility model aims at realizing the following technical scheme:

the utility model discloses a gas furnace steam utilization system, which comprises a gas furnace group consisting of a plurality of gas furnaces, wherein a primary heat exchanger, a secondary heat exchanger and a tertiary heat exchanger are sequentially connected to gas pipes of the gas furnace group, a low-temperature gas pipe is arranged on the tertiary heat exchanger, a heat exchange water inlet pipe, an emptying pipeline of low-pressure steam and a circulating pipe returning to the primary heat exchanger are arranged on the secondary heat exchanger, a low-pressure steam conveying pipe is arranged on the secondary heat exchanger, the low-pressure steam conveying pipe is respectively connected with a causticizing tank, an evaporation raw liquid preheating sleeve pipe and a hot water tank group through branch pipes, and air valves are arranged on the branch pipes, the connecting pipe and the emptying pipeline.

The evaporation raw liquid preheating sleeve is internally provided with the evaporation raw liquid conveying pipe, two ends of the evaporation raw liquid preheating sleeve are closed, and two ends of the evaporation raw liquid preheating sleeve are respectively provided with a low-pressure steam inlet pipe and a heat exchange exhaust pipe.

An exhaust valve is arranged on the low-pressure steam delivery pipe.

The causticizing tank, the evaporation stock solution preheating sleeve and the hot water tank group are all provided with barometers.

The branch pipe is also provided with a flowmeter.

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

1. the pressure required by the causticizing tank, the evaporation raw liquid preheating sleeve and the hot water tank group is lower than that of low-pressure steam of the gas furnace, so that the part of the low-pressure steam which is not used up by the gas furnace is introduced into the causticizing tank, the evaporation raw liquid preheating sleeve and the hot water tank group to provide heating steam for the causticizing tank, the evaporation raw liquid preheating sleeve and the hot water tank group, the low-pressure steam of the gas furnace can be utilized, the energy waste caused by emptying is avoided, the additional heat energy of the causticizing tank can be saved, the evaporation raw liquid can be preheated, the energy consumption of the evaporation raw liquid preheating sleeve for preheating the evaporation raw liquid can be saved, and finally the hot water of the hot water tank group can be heated, so that the energy conservation and emission reduction are facilitated, and the economic benefit of enterprises is improved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of a connection structure according to the present utility model.

Wherein, the gas furnace group 1; a primary heat exchanger 2; a secondary heat exchanger 3; a tertiary heat exchanger 4; an evacuation line 5; a circulation pipe 6; a low pressure steam delivery pipe 7; a causticizing tank 8; evaporating a stock solution to preheat the sleeve 9; a hot water tank set 10.

Detailed Description

Hereinafter, preferred embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

As shown in fig. 1, the utility model discloses a gas furnace steam utilization system, which comprises an existing gas furnace basic structure and an improved low-pressure steam utilization structure, wherein the existing gas furnace basic structure comprises a gas furnace group 1, a primary heat exchanger 2 for air heat exchange, a secondary heat exchanger 3 for water heat exchange and a tertiary heat exchanger 4; specifically, the gas furnace group 1 consists of a plurality of gas furnaces, a primary heat exchanger 2, a secondary heat exchanger 3 and a tertiary heat exchanger 4 are sequentially connected behind the gas furnaces, a low-temperature gas exhaust pipe is arranged on the tertiary heat exchanger 4, and a heat exchange water inlet pipe, an emptying pipeline 5 of low-pressure steam and a circulating pipe 6 returning to the primary heat exchanger 2 are arranged on the secondary heat exchanger 3; the improved low pressure steam utilization structure comprises: the secondary heat exchanger 3 is provided with a low-pressure steam conveying pipe 7, the low-pressure steam conveying pipe 7 is respectively connected with a causticizing tank 8, an evaporation raw liquid preheating sleeve 9 and a hot water tank group 10 through branch pipes, and air valves are arranged on the branch pipes, the connecting pipes and the emptying pipelines 5, so that the steam output by the secondary heat exchanger 3 is directly led to the causticizing tank 8 for receiving low-quality steam without being combined with an alumina low-pressure steam pipe network; evaporating a stock solution to preheat the sleeve 9; the hot water tank set 10 provides heating steam.

Further, an evaporation stock solution conveying pipe is arranged in the evaporation stock solution preheating sleeve 9, two ends of the evaporation stock solution preheating sleeve 9 are closed, and two ends of the evaporation stock solution preheating sleeve 9 are respectively provided with a low-pressure steam inlet pipe and a heat exchange calandria; this allows heat exchange of the evaporation stock through the evaporation stock preheating sleeve 9.

Further, an exhaust valve is provided in the low pressure steam delivery pipe 7. This also facilitates evacuation when the causticizing tank 8, the evaporation stock preheating jacket 9 and the hot water tank group 10 are left with low pressure steam.

Barometers are arranged on the causticizing tank 8, the evaporation stock solution preheating sleeve 9 and the hot water tank group 10, and meanwhile, flow meters are also arranged on the branch pipes. The barometer is favorable for observing the change of the air pressure after the low-pressure steam of the gas furnace enters the causticizing tank 8, the evaporation stock solution preheating sleeve 9 and the hot water tank group 10, and the gas furnace is closed after the change of the air pressure reaches the air pressure required by the causticizing tank 8, the evaporation stock solution preheating sleeve 9 and the hot water tank group 10, so that the output of the low-pressure steam of the gas furnace is stopped; the pressure required by the causticizing tank 8 and the evaporation stock solution preheating sleeve 9 is 0.1Mpa, and the pressure required by the hot water tank set 10 is 0.05Mpa; and the flowmeter is arranged, so that the pressure regulating condition in normal times can be observed, and data recording is facilitated.

When in transformation, only the low-pressure steam delivery pipe 7 is led out on the gas furnace, and the hot water tanks are respectively connected to the causticizing tank 8, the evaporation stock solution preheating sleeve 9 and the hot water tank group 10 through branch pipes.

When the low-pressure steam generator is used, low-pressure steam which is not used for a gas furnace is firstly introduced into the causticizing tank 8, the evaporation raw liquid preheating sleeve 9 and the hot water tank of the hot water tank group 10 through the low-pressure steam conveying pipe 7, and residual steam is emptied after the causticizing tank 8, the evaporation raw liquid preheating sleeve 9 and the hot water tank group 10 are not needed.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variations and modification made to the above embodiment according to the technical matter of the present utility model without departing from the technical scope of the present utility model still fall within the scope of the technical scheme of the present utility model.

Claims (5)

1. The utility model provides a gas stove steam utilization system, it includes gas stove group (1) that become by a plurality of gas stove group (1), has connected gradually primary heat exchanger (2), secondary heat exchanger (3) and tertiary heat exchanger (4) on the gas calandria of gas stove group (1), is equipped with low temperature gas calandria on tertiary heat exchanger (4), is equipped with heat transfer inlet tube, low pressure steam's evacuation pipeline (5) and returns circulating pipe (6) of primary heat exchanger (2) on secondary heat exchanger (3), its characterized in that: the secondary heat exchanger (3) is provided with a low-pressure steam conveying pipe (7), the low-pressure steam conveying pipe (7) is connected with a causticizing tank (8), an evaporation stock solution preheating sleeve (9) and a hot water tank group (10) through branch pipes respectively, and air valves are arranged on the branch pipes, the connecting pipes and the emptying pipeline (5).

2. The gas stove steam utilization system of claim 1, wherein: an evaporation raw liquid conveying pipe is arranged in the evaporation raw liquid preheating sleeve (9), two ends of the evaporation raw liquid preheating sleeve (9) are closed, and two ends of the evaporation raw liquid preheating sleeve (9) are respectively provided with a low-pressure steam inlet pipe and a heat exchange exhaust pipe.

3. The gas stove steam utilization system of claim 1, wherein: an exhaust valve is arranged on the low-pressure steam delivery pipe (7).

4. The gas stove steam utilization system of claim 1, wherein: barometers are arranged on the causticizing tank (8), the evaporation stock solution preheating sleeve (9) and the hot water tank group (10).

5. The gas stove steam utilization system according to any one of claims 1 to 4, wherein: and the branch pipe is also provided with a flowmeter.