CN218034553U

CN218034553U - Magnesium slag waste heat recovery device

Info

Publication number: CN218034553U
Application number: CN202122979662.6U
Authority: CN
Inventors: 胡广涛; 何馥安; 李国杰; 周丹丹; 刘轶哲; 贺林宝; 张恒
Original assignee: Yulin University
Current assignee: Yulin University
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-12-13
Anticipated expiration: 2031-11-30

Abstract

The utility model provides a magnesium sediment waste heat recovery device, including the heat transfer jar, the heat transfer jar has the inner chamber, at least two heat exchange tube subassemblies have in the inner chamber, heat exchange tube subassembly has two annular heat exchange tubes, two annular heat exchange tube respectively with the slag notch and the slag notch one-to-one and the level setting of heat transfer jar are two be connected with many intercommunication standpipe between them between the annular heat exchange tube, many the standpipe is followed annular heat exchange tube's circumference interval sets up, every the heat exchange tube subassembly has corresponding heat transfer fluid inflow branch pipe and heat transfer fluid outflow branch pipe respectively. According to the utility model discloses, the heat exchange tube subassembly has the edge annular heat exchange tube that the circumference annular of heat transfer jar set up and be in about two standpipe between the annular heat exchange tube to make the fluid of circulation in it with have bigger heat transfer area between the magnesium sediment in the heat transfer jar, and then make the utilization of magnesium sediment waste heat retrieve more fully.

Description

Magnesium slag waste heat recovery device

Technical Field

The utility model belongs to the technical field of magnesium sediment waste heat utilization, concretely relates to magnesium sediment waste heat recovery device.

Background

The Pidgeon method is generally adopted for producing raw magnesium in China, belongs to a thermal reduction method, and has the advantages of simple technology and low equipment cost, but the energy consumption is high, the heat utilization rate is low, and simultaneously, a large amount of reduced magnesium slag is generated, the reduced magnesium slag is generated along with the magnesium reduction process, the tapping temperature is high, generally about 1000 ℃, the reduced magnesium slag contains a large amount of heat energy, the heat of the magnesium slag is rarely recycled in the production, and the hot magnesium slag is usually placed in the air for natural cooling, so that the heat is wasted. Research on the utilization of magnesium slag is mainly focused on resource utilization, such as: the cooled magnesium slag is applied to manufacture cement, building bricks and the like; the research on the recovery of the magnesium slag waste heat is not much, and the research is mainly focused on the aspect of producing steam by using a waste heat boiler, but the waste heat utilization is not sufficient in the mode.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a magnesium slag waste heat recovery device, which can overcome the insufficient recycling of magnesium slag waste heat in the related technology.

In order to solve the problem, the utility model provides a magnesium sediment waste heat recovery device, including the heat transfer jar, the heat transfer jar has the inner chamber, the inner chamber has two at least heat exchange tube subassemblies, heat exchange tube subassembly has two annular heat exchange tubes, two annular heat exchange tube respectively with the slag notch and the slag notch one-to-one and the level setting of heat transfer jar, two be connected with many communicate standpipe between them between the annular heat exchange tube, many the standpipe is followed annular heat exchange tube's circumference interval sets up, every heat exchange tube subassembly has corresponding heat transfer fluid inflow branch pipe and heat transfer fluid outflow branch pipe respectively.

In some embodiments, at least two of the heat exchange tube assemblies are sequentially nested at intervals from inside to outside in a radial direction of the heat exchange tank.

In some embodiments, the bottom of the heat exchange tank is conical, and each of the heat exchange tube assemblies has a lower annular heat exchange tube with a height decreasing from outside to inside along the radial direction of the heat exchange tank.

In some embodiments, a plurality of the heat exchange fluid inflow branch pipes are respectively connected to the inflow header pipe in a collective manner, and a plurality of the heat exchange fluid outflow branch pipes are respectively connected to the outflow header pipe in a collective manner.

In some embodiments, the heat exchange fluid outlet leg is on the upper annular heat exchange tube and the heat exchange fluid inlet leg is on the lower annular heat exchange tube.

In some embodiments, a pyramid distributor is further disposed in the inner cavity, and the pyramid distributor is located between the slag inlet and the annular heat exchange tube located above the slag inlet.

In some embodiments, the pyramid distributor is formed by a plurality of annular plates arranged at intervals along the axial direction of the pyramid distributor, and a slag-dropping ring groove is formed between every two adjacent annular plates.

In some embodiments, a valve is disposed at each of the slag inlet and the slag outlet.

In some embodiments, the outer peripheral wall of the heat exchange tank is wrapped with an insulating layer.

In some embodiments, the heat exchange tank has an access opening.

The utility model provides a pair of magnesium sediment waste heat recovery device, the heat exchange tube assembly has the edge annular heat exchange tube that the circumference annular of heat transfer jar set up and be in about two standpipe between the annular heat exchange tube to make the fluid of circulation in it with have bigger heat transfer area between the magnesium sediment in the heat transfer jar, and then make the utilization of magnesium sediment waste heat retrieve more fully.

Drawings

FIG. 1 is a schematic structural view of a magnesium slag waste heat recovery device according to an embodiment of the present invention (including the positional relationship with a reduction furnace and a reduction tank);

fig. 2 is a top view of the pyramidal distributor of fig. 1;

fig. 3 is a top view of the heat exchange tube assembly of fig. 1.

The reference numerals are represented as:

1. a heat exchange tank; 11. a slag inlet; 12. a slag outlet; 13. a heat-insulating layer; 14. an access hole; 2. a heat exchange tube assembly; 21. an annular heat exchange tube; 22. a vertical tube; 31. the heat exchange fluid flows into the branch pipe; 32. a heat exchange fluid outflow branch pipe; 33. an inflow header pipe; 34. an outflow header pipe; 4. a pyramid distributor; 41. an annular plate member; 42. a slag falling ring groove; 5. a valve; 100. a reduction pot; 101. and (5) reducing the furnace.

Detailed Description

Referring to fig. 1 to 3 in combination, according to the embodiment of the present invention, a magnesium slag waste heat recovery device is provided, including heat exchange tank 1, heat exchange tank 1 has an inner cavity, at least two heat exchange tube assemblies 2 have in the inner cavity, heat exchange tube assembly 2 has two annular heat exchange tubes 21, two annular heat exchange tubes 21 respectively with the slag inlet 11 and the slag outlet 12 one-to-one and horizontal setting of heat exchange tank 1, the slag outlet 11 is connected with the slag tapping structure of reduction tank 100, two be connected with many standpipes 22 that communicate between them between annular heat exchange tubes 21, many standpipe 22 is followed annular heat exchange tubes 21's circumference interval sets up, every heat exchange tube assembly 2 has corresponding heat transfer fluid inflow branch pipe 31 and heat transfer fluid outflow branch pipe 32 respectively. In the technical scheme, the heat exchange tube assembly 2 is provided with the annular heat exchange tubes 21 which are annularly arranged along the circumferential direction of the heat exchange tank 1 and the vertical tubes 22 which are positioned between the upper annular heat exchange tube 21 and the lower annular heat exchange tube 21, so that a larger heat exchange area is formed between fluid circulating in the annular heat exchange tubes and magnesium slag in the heat exchange tank 1, and the magnesium slag waste heat is more fully utilized and recovered. It is understood that the fluid entering the heat exchange fluid inlet branch 31 may be normal temperature water, and the fluid exiting the heat exchange fluid outlet branch 32 may be high temperature water or steam.

In some embodiments, at least two heat exchange tube assemblies 2 are sequentially sleeved at intervals from inside to outside along the radial direction of the heat exchange tank 1, that is, the diameters of the annular heat exchange tubes 21 of the heat exchange tube assemblies 2 from inside to outside are larger and larger, so that more sufficient heat exchange can be performed on the high-temperature magnesium slag falling into the heat exchange tank 1. In some embodiments, the bottom of the heat exchange tank 1 is conical, and each of the heat exchange tube assemblies 2 has a lower annular heat exchange tube 21 whose height is gradually decreased from outside to inside along the radial direction of the heat exchange tank 1, that is, the lower annular heat exchange tubes 21 are stacked at intervals in the height direction and matched with the bottom of the conical heat exchange tank 1, so that the heat exchange tube pass of the standpipe 22 is ensured to be longer, and the heat exchange efficiency is further improved. Preferably, the plurality of heat exchange fluid inlet branch pipes 31 are connected to the inlet header pipe 33 in a lump, and the plurality of heat exchange fluid outlet branch pipes 32 are connected to the outlet header pipe 34 in a lump, so that the difficulty of connecting the pipes can be reduced. Furthermore, the heat exchange fluid outflow branch pipe 32 is located above the annular heat exchange pipe 21, and the heat exchange fluid inflow branch pipe 31 is located below the annular heat exchange pipe 21, so that the normal temperature fluid can form countercurrent heat exchange with magnesium slag in the heat exchange tank 1, and the magnesium slag waste heat recovery efficiency is further improved.

In some embodiments, the inner cavity is further provided with a pyramid distributor 4, the pyramid distributor 4 is located between the slag inlet 11 and the annular heat exchange tube 21 above, so that the high-temperature magnesium slag falling into the reduction tank 100 above can be spread, the heat exchange area caused by the aggregation of the magnesium slag is prevented from being small, and the waste heat recovery efficiency can be further improved. In some embodiments, the pyramid distributor 4 is formed by disposing a plurality of annular plates 41 at intervals along the axial direction of the pyramid distributor 4 (in one embodiment, a plurality of the annular plates 41 are disposed concentrically), and a slag-dropping ring groove 42 is formed between two adjacent annular plates 41 (specifically, metal plates), preferably, the slag-dropping ring groove 42 is located in a one-to-one correspondence and a position corresponding to each annular heat exchange tube 21, so that the magnesium slag can be spread in the heat exchange tank 1 more uniformly.

In some embodiments, a valve 5 is disposed at each of the slag inlet 11 and the slag outlet 12, and the valve 5, such as an electro-hydraulic flat gate, can control the magnesium slag entering or discharging from the heat exchange tank 1. The heat exchange tank 1 is characterized in that the outer peripheral wall of the heat exchange tank 1 is wrapped with a heat insulation layer 13, and the heat exchange tank 1 is provided with an access hole 14.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a magnesium sediment waste heat recovery device, its characterized in that, includes heat transfer jar (1), heat transfer jar (1) has the inner chamber, at least two heat exchange tube subassemblies (2) have in the inner chamber, heat exchange tube subassembly (2) have two annular heat exchange tube (21), two annular heat exchange tube (21) respectively with the slag inlet (11) and slag notch (12) one-to-one and the level setting of heat transfer jar (1), two be connected with many intercommunication standpipe (22) between them between annular heat exchange tube (21), many standpipe (22) are followed the circumference interval of annular heat exchange tube (21) sets up, every heat exchange tube subassembly (2) have corresponding heat transfer fluid inflow branch pipe (31) and heat transfer fluid outflow branch pipe (32) respectively.

2. The magnesium slag waste heat recovery device according to claim 1, wherein at least two heat exchange tube assemblies (2) are sequentially sleeved at intervals from inside to outside along the radial direction of the heat exchange tank (1).

3. The magnesium slag waste heat recovery device according to claim 2, wherein the bottom of the heat exchange tank (1) is conical, and each heat exchange tube assembly (2) is provided with a lower annular heat exchange tube (21) which is lower in height from the outside to the inside in the radial direction of the heat exchange tank (1).

4. The magnesium slag waste heat recovery device according to claim 1, wherein a plurality of the heat exchange fluid inflow branch pipes (31) are connected to an inflow header pipe (33) in a collective manner, and a plurality of the heat exchange fluid outflow branch pipes (32) are connected to an outflow header pipe (34) in a collective manner.

5. The magnesium slag waste heat recovery device according to claim 4, wherein the heat exchange fluid outflow branch pipe (32) is located above the annular heat exchange pipe (21), and the heat exchange fluid inflow branch pipe (31) is located below the annular heat exchange pipe (21).

6. The magnesium slag waste heat recovery device according to claim 1, wherein a pyramid distributor (4) is further arranged in the inner cavity, and the pyramid distributor (4) is located between the slag inlet (11) and the annular heat exchange tube (21) located above.

7. The magnesium slag waste heat recovery device according to claim 6, wherein the pyramid distributor (4) is formed by a plurality of annular plates (41) arranged at intervals along the axial direction of the pyramid distributor (4), and a slag-dropping ring groove (42) is formed between two adjacent annular plates (41).

8. The magnesium slag waste heat recovery device according to claim 1, wherein a valve (5) is arranged at each of the slag inlet (11) and the slag outlet (12).

9. The magnesium slag waste heat recovery device according to claim 1, wherein the outer peripheral wall of the heat exchange tank (1) is wrapped with an insulating layer (13).

10. The magnesium slag waste heat recovery device according to claim 1, wherein the heat exchange tank (1) is provided with an access opening (14).