CN214842555U - Energy-saving system for matching smelting blast furnace with steam boiler - Google Patents

Abstract

The utility model discloses a smelt blast furnace and steam boiler's cooperation economizer system, including the blast furnace, steam boiler and combustion heater, combustion heater includes the casing, the burner, combustion-supporting tuber pipe, the spark plug, inlet tube and outlet pipe, the right side of casing has the burning exhanst gas outlet, the burner links to each other with the gas outlet of blast furnace, the outlet side of inlet tube and the import side of outlet pipe are connected with branch water ring and water ring respectively, the outlet side and the steam boiler moisturizing pipe of outlet pipe link to each other, the inside and outside both sides of branch water ring are connected with a plurality of heated barrels through first communicating pipe respectively, a plurality of heated barrels are close to the burner along the circumference evenly distributed of branch water ring and the left side of heated barrel, the utility model discloses utilize burning blast furnace gas to produce the heat and advance and heat the rivers in the moisturizing boiler pipe for steam boiler's intake temperature has obtained the improvement, this fuel that has not only effectively avoided the environmental pollution that blast furnace gas direct emission brought but also reduced steam boiler uses the burner Two purposes are achieved by one.

Description

Energy-saving system for matching smelting blast furnace with steam boiler

Technical Field

The utility model relates to a blast furnace tail gas energy-saving recovery equipment field, concretely relates to cooperation economizer system who smelts blast furnace and steam boiler.

Background

As is well known, when a blast furnace is used to smelt steel, a blast furnace gas byproduct is generated, the main component of the blast furnace gas is combustible such as carbon monoxide, and if the combustible is directly discharged, environmental pollution and energy waste are caused, so how to effectively utilize the blast furnace gas becomes a problem to be solved.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the background art, the utility model aims to provide a smelt blast furnace and steam boiler's cooperation economizer system, it has effectively solved the problem that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a smelt cooperation economizer system of blast furnace and steam boiler, includes blast furnace, steam boiler and sets up the combustion heater between boiler and steam boiler, the combustion heater includes casing, burner tip, combustion-supporting tuber pipe, spark plug, inlet tube and outlet pipe, the right side of casing has the burning exhanst gas outlet, and the casing outside has still wrapped up the thermal insulation material layer, the burner tip with the gas outlet of blast furnace links to each other, the outlet side of inlet tube and the inlet side of outlet pipe are connected with branch water ring and water ring respectively, the outlet side of outlet pipe links to each other with the steam boiler moisturizing pipe, the inside and outside both sides of dividing the water ring are connected with a plurality of heated barrels through first communicating pipe respectively, a plurality of heated barrels along the circumference evenly distributed of dividing the water ring just the left side of heated barrel is close to the burner tip, still be provided with the baffle in the heated barrel, have the clearance between the left side of baffle and the inner wall of heated barrel, the baffle separates the inner chamber of the heated cylinder into an inlet chamber and a deflection chamber, the first communicating pipe is communicated with the inlet chamber, the outlet end of the first communicating pipe is far away from the gap, and one side of the deflection chamber, far away from the gap, is communicated with the water collecting ring through the second communicating pipe.

Further, the thermal insulation material layer is an aerogel felt layer.

Furthermore, the combustion flue gas outlet is connected with a flue gas waste heat recoverer, the flue gas waste heat recoverer comprises a box body, a water collecting sleeve and a water distributing sleeve, the water collecting sleeve and the water distributing sleeve are respectively arranged on the left side and the right side of the box body, the water distributing sleeve and the water collecting sleeve are connected through a plurality of heat absorbing pipes, a fresh water replenishing pipe is further connected onto the water distributing sleeve, the water collecting sleeve is further connected with the water inlet pipe, the upper side and the lower side of the box body are respectively connected with an air outlet pipe and an air inlet pipe, and the inlet side of the air inlet pipe is connected with the combustion flue gas outlet.

Furthermore, the heat absorption tube comprises a cross-shaped framework plate and four tube flaps welded on the cross-shaped framework plate, the cross-shaped framework plate and the four tube flaps jointly surround the heat absorption tube, and the cross-shaped framework plate protrudes out of the peripheral surface of the tube flaps.

Furthermore, still the cooperation is provided with multiunit baffling subassembly between cross skeleton board and the tube flap, and multiunit baffling subassembly is along the heat absorption pipe axial evenly distributed, the baffling subassembly is including setting firmly first baffling board and the second baffling board on cross skeleton board and tube flap respectively, and first baffling board and second baffling board are fan-shaped and sector ring shape respectively.

The utility model discloses following beneficial technological effect has:

the utility model discloses utilize the rivers in the heat heating steam boiler moisturizing pipe that blast furnace gas burning produced for steam boiler's the temperature of intaking has obtained improving, and this has both effectively avoided the environmental pollution that blast furnace gas direct emission brought and has reduced steam boiler's fuel use amount again, kills two birds with one stone.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the combustion heater according to an embodiment of the present invention;

FIG. 3 is a left side view of an assembly structure of a heat receiving cylinder according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a flue gas waste heat recoverer according to an embodiment of the present invention;

fig. 5 is a left side view of the internal structure of the heat absorbing pipe according to the embodiment of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-5, the energy saving system for a smelting blast furnace and a steam boiler in this embodiment includes a blast furnace 1, a steam boiler 2 and a combustion heater 3 disposed between the boiler 1 and the steam boiler 2, the combustion heater 3 includes a housing 4, a burner 5, a combustion-supporting air pipe 6, a spark plug 7, an inlet pipe 8 and an outlet pipe 9, the right side of the housing 4 has a combustion flue gas outlet 10, the outer side of the housing 4 is further wrapped with a heat insulating material layer 11, the heat insulating material layer 11 is an aerogel felt layer, the burner 5 is connected to an air outlet of the blast furnace 1, blast furnace gas enters the burner 5 and is ignited by the spark plug 7 after being mixed with intake air of the combustion-supporting air pipe 6 in the housing 4, an outlet side of the inlet pipe 8 and an inlet side of the outlet pipe 9 are respectively connected to a water distribution ring 12 and a water collection ring 13, an outlet side of the outlet pipe 9 is connected to a water replenishing pipe 14, the inside and outside both sides of dividing water ring 12 are connected with a plurality of heated barrels 16 through first communicating pipe 15 respectively, first communicating pipe 15 and heated barrel 16 one-to-one, a plurality of heated barrels 16 are along dividing water ring 12's circumference evenly distributed and the left side that is close to burner tip 5 by heated barrel 16, still be provided with baffle 17 in the heated barrel 16, have the clearance between the left side of baffle 17 and the inner wall that is heated barrel 16, baffle 17 separates the inner chamber of heated barrel 16 for getting into chamber 18 and baffling chamber 19, it is linked together through above-mentioned clearance to get into chamber 18 and baffling chamber 19, first communicating pipe 15 is linked together and the clearance is kept away from with the exit side that gets into chamber 18, one side that baffling chamber 19 kept away from the clearance is linked together with water collecting ring 13 through second communicating pipe 20.

The combustion flue gas outlet 10 is connected with a flue gas waste heat recoverer 21, the flue gas waste heat recoverer 21 comprises a box body 22, a water collecting sleeve 23 and a water distributing sleeve 24 which are respectively arranged on the left side and the right side of the box body 22, the water distributing sleeve 24 is connected with the water collecting sleeve 23 through a plurality of heat absorbing pipes 25, the axes of the heat absorbing pipes 25 are perpendicular to the flow direction of the combustion flue gas in the box body 22, a fresh water replenishing pipe 26 is further connected onto the water distributing sleeve 24, the water collecting sleeve 23 is further connected with the water inlet pipe 8, the upper side and the lower side of the box body 22 are further respectively connected with an air outlet pipe 27 and an air inlet pipe 28, the inlet side of the air inlet pipe 28 is connected with the combustion flue gas outlet 10, the outlet side of the air inlet pipe 28 is provided with a plurality of branch pipes 29, the air outlet of the air inlet pipe 28 is dispersed, and the box body 22 is uniformly filled with the combustion flue gas.

The heat absorbing pipe 25 comprises a cross-shaped framework plate 30 and four pipe flaps 31 welded on the cross-shaped framework plate 30, the cross-shaped framework plate 30 and the four pipe flaps 31 jointly enclose the heat absorbing pipe 25, the cross-shaped framework plate 30 protrudes out of the outer peripheral surface of the pipe flaps 31, the cross-shaped framework plate 30 increases the heat exchange area of the heat absorbing pipe 25, after the cross-shaped framework plate 30 extending out of the pipe flaps 31 absorbs heat and heats up, the heat can be transferred to the cross-shaped framework plate 30 on the inner side of the pipe flaps 31 in a heat conduction mode, so that the heating up of water flow in the heat absorbing pipe 25 is facilitated, a plurality of groups of baffle assemblies are further arranged between the cross-shaped framework plate 30 and the pipe flaps 31 in a matching mode, the baffle assemblies are uniformly distributed along the axial direction of the heat absorbing pipe 25, each group of baffle assembly comprises a first baffle plate 32 and a second baffle plate 33 which are fixedly arranged on the cross-shaped framework plate 30 and the pipe flaps 31 respectively, the first baffle plate 32 and the second baffle plate 33 are in a fan-shaped and ring shape respectively, the projected area of the first baffle plate 32 in the axial direction of the heat absorption tube 25 and the projected area of the second baffle plate 33 in the axial direction of the heat absorption tube 25 have an overlapped part, so that the back-turning flow of water flow in the heat absorption tube 25 is ensured, the flow path and the heat absorption time of the water flow are prolonged, and the temperature rise of the water flow is facilitated.

The working process of the embodiment is as follows:

blast furnace gas is discharged from a blast furnace gas outlet and then enters a combustion nozzle 5, the combustion nozzle 5 exhausts gas from a mixed combustion-supporting air pipe 6 and burns in a shell 4 under the ignition of a spark plug 7, flame burns a heated cylinder 16, combustion flue gas enters a flue gas waste heat recoverer 21 through a combustion flue gas outlet 10, make-up water of a steam boiler 2 firstly enters a heat absorption pipe 25 through a new water make-up pipe 26 and a water distribution sleeve 24, the heat of the combustion flue gas is absorbed in the heat absorption pipe 25 and heated, then the heat enters the water inlet pipe 8 of the combustion heater 3 through the water collecting sleeve 23, the water flow entering the water inlet pipe 8 enters the heat receiving cylinder 16 after passing through the water dividing ring 12 and the first communication pipe 15, the water flows into the cavity 18 and the baffling cavity 19 in the heating cylinder 16 and is heated by flame sprayed by the burner 5, and the heated water flows into the water collecting ring 13 through the second communicating pipe 20 and then enters the water replenishing pipe 14 of the steam boiler through the water outlet pipe 9; in the process, the blast furnace gas is used for burning to generate heat so as to heat water flow in the water replenishing pipe 14 of the steam boiler, so that the water inlet temperature of the steam boiler 2 is increased, the environmental pollution caused by direct discharge of the blast furnace gas is effectively avoided, the fuel consumption of the steam boiler 2 is reduced, and the two purposes are achieved at one stroke; in addition, the combustion heater 3 and the flue gas waste heat recoverer 21 in the embodiment have high heat exchange efficiency, and are beneficial to the temperature rise of water flow.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (5)

1. The utility model provides a smelt cooperation economizer system of blast furnace and steam boiler, its characterized in that, includes blast furnace, steam boiler and sets up the combustion heater between boiler and steam boiler, the combustion heater includes casing, burner tip, combustion-supporting tuber pipe, spark plug, inlet tube and outlet pipe, the right side of casing has the burning exhanst gas outlet, and the casing outside has still wrapped up the thermal insulation material layer, the burner tip with the gas outlet of blast furnace links to each other, the outlet side of inlet tube and the inlet side of outlet pipe are connected with branch water ring and water ring respectively, the outlet side of outlet pipe links to each other with the steam boiler moisturizing pipe, the inside and outside both sides of dividing the water ring are connected with a plurality of heated barrels through first communicating pipe respectively, a plurality of heated barrels are along the circumference evenly distributed of dividing the water ring just the left side of heated barrel is close to the burner tip, still be provided with the baffle in the heated barrel, the left side of baffle and the inner wall that is heated the section of thick bamboo have the clearance between, the baffle separates the inner chamber that is heated the section of thick bamboo into entering chamber and baffling chamber, first communicating pipe with it is linked together and the exit end of first communicating pipe is kept away from to get into the chamber the clearance, baffling chamber keep away from one side in clearance through second communicating pipe with the ring that catchments is linked together.

2. The system of claim 1, wherein the thermal insulation material layer is an aerogel felt layer.

3. The energy-saving system for matching a smelting blast furnace and a steam boiler as claimed in claim 1, wherein the combustion flue gas outlet is connected with a flue gas waste heat recoverer, the flue gas waste heat recoverer comprises a box body, and a water collecting sleeve and a water distributing sleeve which are respectively arranged on the left side and the right side of the box body, the water distributing sleeve and the water collecting sleeve are connected through a plurality of heat absorbing pipes, the water distributing sleeve is further connected with a fresh water replenishing pipe, the water collecting sleeve is further connected with the water inlet pipe, the upper side and the lower side of the box body are further respectively connected with an air outlet pipe and an air inlet pipe, and the inlet side of the air inlet pipe is connected with the combustion flue gas outlet.

4. The system of claim 3, wherein the heat absorbing tube comprises a cross-shaped frame plate and four tube flaps welded on the cross-shaped frame plate, the cross-shaped frame plate and the four tube flaps jointly enclose the heat absorbing tube, and the cross-shaped frame plate protrudes out of the outer peripheral surface of the tube flaps.

5. The energy-saving system for matching a smelting blast furnace and a steam boiler as claimed in claim 4, wherein a plurality of sets of baffle assemblies are further arranged between the cross-shaped framework plate and the tube flaps in a matching manner, the baffle assemblies are uniformly distributed along the axial direction of the heat absorbing tube, each baffle assembly comprises a first baffle plate and a second baffle plate which are fixedly arranged on the cross-shaped framework plate and the tube flap respectively, and the first baffle plate and the second baffle plate are respectively in a fan shape and a fan ring shape.

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