Heat preservation chute and flue gas waste heat utilization system

Abstract

The utility model discloses a heat preservation chute and a flue gas waste heat utilization system, a chute body of the chute comprises a refractory brick layer and a first heat preservation layer which are sequentially arranged from inside to outside, a flue gas channel is arranged in the side wall and / or the bottom of the chute body, and the flue gas channel is arranged between the refractory brick layer and the first heat preservation layer. The flue gas channel extends along the length direction of the tank body; a flue gas inlet and a flue gas outlet which extend towards the outer side of the tank body are formed in the first thermal insulation layer; and the flue gas inlet and the flue gas outlet are respectively communicated with the flue gas channel. According to the heat preservation chute and the flue gas waste heat utilization system, the technical problem that in the prior art, heat preservation energy consumption of a chute is high is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to non-ferrous metal smelting conveying device technical field, concretely relates to a heat preservation chute and flue gas waste heat utilization system. BACKGROUND

[0002] In the lead smelting industry, the crude lead produced by the bottom blowing furnace or the side blowing furnace is flowed to the refining kettle of the refining workshop through the lead chute for slag refining, and the heat of the liquid lead can be fully utilized. Since the conveying distance of the liquid lead is far, the liquid lead is prone to cooling and solidification in the lead chute. At present, in order to solve the problem of cooling and solidification of the liquid lead, the lead chute is generally heated by electricity to keep the heat of the chute, so as to avoid the cooling of the liquid lead, but the energy consumption of the electrically heated lead chute is high, and the heating element is easy to be damaged and needs to be replaced from time to time.

[0003] Chinese patent application publication No. CN103639376A discloses a copper smelting heat preservation chute device, which comprises an isosceles trapezoidal steel structure foundation, a masonry layer made of refractory material and high alumina brick on both sides and the bottom of the steel structure foundation, a U-shaped prefabricated part placed on the masonry layer, a filling layer formed by filling the gap between the prefabricated part and the masonry layer with rammed material, a cover plate covering both sides of the chute, and a natural gas burner bushing inserted into the circular hole in the middle of the cover plate. When the device is used, the natural gas burner is inserted into the natural gas burner bushing to bake the chute, thereby improving the heat preservation performance of the chute. However, the consumption of natural gas is large, and the cost is high. CONTENT OF THE UTILITY MODEL

[0004] In view of the existing technical problems, the utility model aims to provide a heat preservation chute and flue gas waste heat utilization system, which can solve the technical problem of high energy consumption of the chute in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A heat preservation chute, the chute body of the chute comprises a refractory brick layer and a first heat preservation layer arranged in sequence from inside to outside, and the structural characteristics are that a flue gas passage is arranged in the side wall and / or the bottom of the chute body, the flue gas passage is arranged between the refractory brick layer and the first heat preservation layer, and the flue gas passage extends along the length direction of the chute body; a flue gas inlet and a flue gas outlet extending to the outside of the chute body are arranged on the first heat preservation layer, and the flue gas inlet and the flue gas outlet are respectively communicated with the flue gas passage.

[0007] When the heat preservation chute of the present application is used, the molten fluid to be conveyed flows in the chute body, the high-temperature flue gas produced in the production enters the flue gas passage through the flue gas inlet, and the residual heat of the high-temperature flue gas provides heat for the chute body, thereby improving the heat preservation effect of the chute.

[0008] Preferably, the cross section of the flue gas channel is U-shaped structure, and the U-shaped structure matches the cross section shape of the tank body. The flue gas channel is arranged as U-shaped structure, and the molten fluid is wrapped by the high-temperature flue gas when the heat preservation tank is used, thereby further improving the heat preservation effect of the tank.

[0009] Preferably, a plurality of U-shaped partitions are arranged in the flue gas channel along the length direction, and each U-shaped partition is provided with a communication port, and the flue gas inlet and the flue gas outlet are arranged at the two ends of the flue gas channel along the length direction. The flue gas channel is divided into a plurality of small flue gas channels by arranging the U-shaped partitions, and the adjacent small flue gas channels are connected through the communication ports, so that the fluid in the flue gas channel flows in a detour, thereby increasing the residence time of the fluid in the flue gas channel, and further improving the heat preservation effect of the tank.

[0010] Preferably, the flue gas inlet, the communication ports on the adjacent U-shaped partitions, the communication ports on the adjacent two U-shaped partitions, and the flue gas outlet and the communication ports on the adjacent U-shaped partitions are staggered. By staggering the flue gas inlet, the communication ports and the flue gas outlet, the flow path of the high-temperature flue gas in the flue gas channel is prolonged, the heat exchange is further enhanced, and the heat preservation effect of the heat preservation tank is improved.

[0011] Preferably, the flue gas inlet and the flue gas outlet are arranged at the top of the flue gas channel, and the communication ports on each U-shaped partition are arranged at the top of the U-shaped partition. The flue gas inlet, the communication ports and the flue gas outlet are arranged at the top, which maximizes the flow path of the high-temperature flue gas in the flue gas channel.

[0012] Specifically, the flue gas channel is surrounded by an outer steel plate and an inner steel plate, and the outer steel plate and the inner steel plate are both U-shaped structures; the inner steel plate is connected with the outer wall of the refractory brick layer, and the outer steel plate is connected with the inner wall of the first heat preservation layer.

[0013] Preferably, the tank body is provided with a plurality of flanges, and the plurality of tank bodies are connected through the flanges. According to the actual length requirement, the plurality of tank bodies are used in combination, and are connected through the flanges, which is practical.

[0014] Preferably, the tank body is provided with a cover plate, the cover plate is movably connected with the tank body, and the surface of the cover plate is provided with a second heat preservation layer. According to the actual use requirement, the cover plate can also be made in sections.

[0015] Based on the same inventive concept, this application also provides a flue gas waste heat utilization system, including a first furnace body, a second furnace body, and an insulated chute as described above; the chute is inclined, with its upper end connected to the discharge port of the first furnace body, its lower end connected to the inlet of the second furnace body, and its flue gas inlet connected to the flue gas outlet of either the first or second furnace body. The molten metal from the first furnace body is transported to the second furnace body via the insulated chute, and the high-temperature flue gas from the first or second furnace body provides heat to the chute, improving its insulation effect. This system requires no electricity and effectively reduces operating costs.

[0016] Preferably, the flue gas inlet is located at the lower end of the tank, and the flue gas outlet is located at the upper end of the tank.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. The insulated chute and flue gas waste heat utilization system of this utility model utilize the waste heat of high-temperature exhaust gas to provide heat for the chute, eliminating the need for electricity and effectively reducing operating costs;

[0019] 2. The insulated chute of this utility model does not require replacement of easily damaged parts; it only requires periodic inspection of the internal refractory brick wear and periodic replacement of the refractory bricks.

[0020] 3. The heat-insulating chute of this utility model can be flexibly spliced ​​in multiple sections, making it highly adaptable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of the thermal insulation chute of this utility model;

[0022] Figure 2 This is a front view of the thermal insulation chute of this utility model;

[0023] Figure 3 yes Figure 2 A top-view structural diagram;

[0024] Figure 4 yes Figure 2 Schematic diagram of the U-shaped partition structure.

[0025] In the figure

[0026] 1-Tank body, 101-Refractory brick layer, 102-First insulation layer, 2-Flue gas passage, 201-Outer steel plate, 202-Inner steel plate, 3-Flue gas inlet, 4-Flue gas outlet, 5-U-shaped partition, 6-Connecting port, 7-Cover plate, 8-Second insulation layer, 9-Flange. Detailed Implementation

[0027] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words 'upper', 'lower', 'left', 'right' appear below, they only mean the same direction as the upper, lower, left and right of the drawings, and do not limit the structure.

[0028] As shown in Figure 1 and Figure 3 , the heat preservation chute of the embodiment can be applied to long-distance transportation of liquid lead, comprising a chute body 1, the opposite two side walls and the bottom of the chute body 1 are provided with flue gas channels 2, and the flue gas channels 2 extend along the length direction of the chute body 1. As shown in Figure 1 , the flue gas channels 2 are U-shaped structures, and the U-shaped structures match the cross-sectional shape of the chute body 1 along the width direction. The flue gas channels 2 are enclosed by the outer layer steel plate 201 and the inner layer steel plate 202 of the U-shaped structure, the inner layer steel plate 202 is connected with the outer wall of the inner layer refractory brick layer 101 of the chute body 1, and the outer layer steel plate 201 is connected with the inner wall of the outer layer first heat preservation layer 102 of the chute body 1. The first heat preservation layer 102 is provided with a flue gas inlet 3 and a flue gas outlet 4 extending to the outside of the chute, and the flue gas inlet 3 and the flue gas outlet 4 are communicated with the flue gas channels 2 respectively. The refractory brick layer 101 preferably selects thin high-quality refractory bricks to reduce the overall weight of the chute. The chute body 1 is provided with a cover plate 7 movably connected with the chute body 1, and the cover plate 7 is provided with a second heat preservation layer 8 on the surface, and the first heat preservation layer 102 and the second heat preservation layer 8 are both made of aluminum silicate fiber felt material. As shown in Figure 2 and Figure 4 , every meter along the length direction of the flue gas channels 2 is provided with a U-shaped partition plate 5, the plurality of U-shaped partition plates 5 can support the flue gas channels 2, and the both ends of the chute body 1 are provided with flanges 9. The U-shaped partition plate 5 is provided with a communication port 6, the flue gas inlet 3 and the flue gas outlet 4 are arranged at the both ends of the flue gas channels 2 along the length direction. The flue gas inlet 3 and the flue gas outlet 4 are arranged at the top of the flue gas channels 2, the communication port 6 on each U-shaped partition plate 5 is arranged at the top of the U-shaped partition plate 5, and the flue gas inlet 3, the communication ports 6 on the adjacent U-shaped partition plates 5, the communication ports 6 on the adjacent two U-shaped partition plates 5 and the flue gas outlet 4 and the communication ports 6 on the adjacent U-shaped partition plates 5 are staggered.

[0029] The embodiment also provides a flue gas waste heat utilization system, comprising a first furnace body, a second furnace body and the heat preservation chute as described above, the chute body 1 is arranged obliquely, the upper end of the chute body 1 is communicated with the discharge port of the first furnace body, and the lower end of the chute body 1 is communicated with the feeding port of the second furnace body. The flue gas inlet 3 is arranged at the lower end side of the chute body 1, the flue gas outlet 4 is arranged at the upper end side of the chute body 1, and the flue gas inlet 3 is communicated with the flue gas outlet of the first furnace body or the second furnace body.

[0030] During use, the molten lead discharged from the first furnace flows within tank 1 and is then transported to the second furnace. For example... Figure 3 As shown, high-temperature flue gas is introduced into the flue gas channel 2 through the flue gas inlet 3. Multiple U-shaped baffles 5 inside the flue gas channel 2 allow the flue gas to move in a circuitous manner, and finally it is discharged through the flue gas outlet 4. The high-temperature flue gas provides insulation for the entire tank 1 through heat exchange with the inner steel plate 202 and the outer steel plate 201. The cover plate 7 on the upper part of the tank 1 and its second insulation layer 8 effectively reduce heat loss from the lead liquid surface. Depending on the actual length requirements, multiple tanks 1 can be spliced ​​together using flanges 9 at their ends, and the cover plate 7 can also be manufactured in multiple sections. During maintenance, simply open the cover plate 7, periodically check the wear and tear of the refractory bricks in the internal refractory brick layer 101, and replace the refractory bricks as needed.

[0031] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the embodiments by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

Claims

1. A holding-out chute, a chute body (1) of the chute comprising, from inside to outside, a refractory brick layer (101) and a first holding-out layer (102), characterized in that: The flue gas passage (2) is arranged between the refractory brick layer (101) and the first heat preservation layer (102), and extends along the length direction of the groove body (1); the first heat preservation layer (102) is provided with a flue gas inlet (3) and a flue gas outlet (4) extending to the outside of the groove body (1), and the flue gas inlet (3) and the flue gas outlet (4) are communicated with the flue gas passage (2) respectively.

2. The holding chute according to claim 1, characterized in that: The cross section of the flue gas passage (2) is a U-shaped structure, and the U-shaped structure matches the cross section shape of the groove body (1).

3. The holding chute according to claim 2, characterized in that: A plurality of U-shaped partitions (5) are arranged in the flue gas passage (2) along the length direction, and each U-shaped partition (5) is provided with a communication port (6); the flue gas inlet (3) and the flue gas outlet (4) are arranged at the two ends of the flue gas passage (2) along the length direction.

4. The holding chute according to claim 3, characterized in that: The flue gas inlet (3), the communication ports (6) on the adjacent U-shaped partitions (5), the communication ports (6) on the adjacent two U-shaped partitions (5), and the flue gas outlet (4) and the communication ports (6) on the adjacent U-shaped partitions (5) are arranged alternately.

5. The holding chute according to claim 4, characterized in that: The flue gas inlet (3) and the flue gas outlet (4) are arranged at the top of the flue gas passage (2), and the communication ports (6) on each U-shaped partition (5) are arranged at the top of the U-shaped partition (5).

6. The holding chute according to any one of claims 1 to 5, characterized in that: The flue gas passage (2) is enclosed by an outer layer steel plate (201) and an inner layer steel plate (202), and the outer layer steel plate (201) and the inner layer steel plate (202) are both U-shaped structures; the inner layer steel plate (202) is connected with the outer wall of the refractory brick layer (101), and the outer layer steel plate (201) is connected with the inner wall of the first heat preservation layer (102).

7. The holding chute according to any one of claims 1 to 5, characterized in that: A plurality of groove bodies (1) are arranged, and the end of each groove body (1) is provided with a flange (9), and the groove bodies (1) are connected through the flanges (9) between the head and the tail.

8. The holding chute according to any one of claims 1 to 5, characterized in that: A cover plate (7) is arranged at the top of the groove body (1), and the cover plate (7) is movably connected with the groove body (1), and the surface of the cover plate (7) is provided with a second heat preservation layer (8).

9. A flue gas waste heat utilization system comprising a first furnace body and a second furnace body, characterized by: The application further discloses a heat preservation chute, and the groove body (1) is arranged obliquely, the upper end of the groove body (1) is communicated with the discharge port of the first furnace body, the lower end of the groove body (1) is communicated with the feeding port of the second furnace body, and the flue gas inlet (3) is communicated with the flue gas outlet of the first furnace body or the second furnace body.

10. The flue gas waste heat recovery system of claim 9, wherein: The flue gas inlet (3) is arranged at the lower end of the groove body (1), and the flue gas outlet (4) is arranged at the upper end of the groove body (1).

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