A high-temperature solid material waste heat boiler

Abstract

The utility model provides a kind of high-temperature solid material waste heat boiler, including fender, first heat exchange pipe, second heat exchange pipe and steam drum;The fender is enclosed into the cylinder structure for high-temperature solid material from top to bottom to flow, first heat exchange pipe is located in the upper section of cylinder structure inside, second heat exchange pipe is located in the lower section of cylinder structure inside, first heat exchange pipe and second heat exchange pipe are all by spiral coil pipe structure from top to bottom, independently the flow cross section of high-temperature solid material is divided into several areas, the water inlet and water outlet of first heat exchange pipe are connected with the steam drum outside cylinder structure respectively, and the water outlet of second heat exchange pipe is connected with the steam drum.The utility model waste heat boiler uses the mode that heat exchange pipe and high-temperature solid physical direct contact, can effectively recover high-temperature sensible heat, produce steam.Heat exchange pipe spiral arrangement, multiple area segmentation material flow cross section, expansion free, both energy saving, and can extend equipment service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of waste heat boiler, especially relates to a high-temperature solid material waste heat boiler. BACKGROUND

[0002] In the carbon process, petroleum coke or pitch coke and the like are calcined at high temperature, and the calcined coke at a high temperature of about 1200 DEG C falls slowly into a water jacket type cooler under the action of gravity and is cooled to below about 100 DEG C; in addition, various solid particles such as high-temperature steel slag, various slags and high-temperature carbon and the like can be cooled in a similar manner.

[0003] The existing cooling process of the calcined coke at a high temperature is that a water jacket structure type is adopted, a partition is provided between the calcined coke and the water jacket, the calcined coke is cooled, cold water is changed into hot water, the hot water is cooled by an external cooling tower to become cold water, and the cold water is driven by a circulating pump to enter the water jacket type cooler again. The water jacket type cooler is divided into high-temperature and low-temperature two sections, and the cooling water is connected in series.

[0004] Because the quality of the circulating water is poor, dirt is easily deposited, the cooling capacity is reduced, and the wall plate of the jacket is damaged; at the same time, there is a water flow dead angle at the top of the water jacket, so water is often retained to become steam, the cooling capacity is also reduced, and the wall plate is also bulged; there is a dirt deposition dead zone at the bottom, and the dirt cannot be discharged. In addition, the heat of the calcined coke at a high temperature is wasted. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a high-temperature solid material waste heat boiler.

[0006] TECHNICAL SCHEME

[0007] The utility model provides a high-temperature solid material waste heat boiler that can solve the above-mentioned technical problems.

[0008] As a specific implementation scheme, the first heat exchange pipe and the second heat exchange pipe are independently "8"-shaped coil pipe structures or "lengthened 8"-shaped coil pipe structures; the "8"-shaped coil pipe structure divides the flow cross section of the high-temperature solid material into two regions, and the "lengthened 8"-shaped coil pipe structure divides the flow cross section of the high-temperature solid material into more than two regions.

[0009] As a specific embodiment, the first heat exchange pipe and the second heat exchange pipe each comprise a pipe body close to a guard plate and a pipe body forming a partition belt in the middle of the cylinder structure.

[0010] The pipe diameter of the first heat exchange pipe is larger than that of the second heat exchange pipe, the first heat exchange pipe is located in the upper high-temperature section and is used for steam production, so the diameter is large, and the second heat exchange pipe is located in the lower low-temperature section and is used for cooling water, so the diameter is smaller than that of the first heat exchange pipe.

[0011] As a further scheme, the pipe body close to the guard plate is provided with straight fins on the pipe wall; the pipe body forming the partition belt directly contacts between the upper and lower adjacent pipe bodies, forming an upper and lower overlapping structure.

[0012] As a further scheme, the uppermost pipe body forming the partition belt is provided with an anti-abrasion cover at the top of the pipe wall, which can reduce the abrasion of the pipe body by solid materials.

[0013] As a specific embodiment, the lower end opening of the first heat exchange pipe is a water inlet, and the upper end opening is a water outlet, which are respectively connected with the steam drum outside the cylinder structure; the upper end opening of the second heat exchange pipe is a water outlet connected with the steam drum, and the lower end opening is a water inlet connected with an independent water supply device.

[0014] As a specific embodiment, the guard plate comprises an outer guard plate, a heat preservation layer and an inner guard plate, and the heat preservation layer is arranged between the outer guard plate and the inner guard plate.

[0015] As a further scheme, the upper ends of the outer guard plate and the inner guard plate are respectively connected with an upper flange, and the lower ends are respectively connected with a lower flange.

[0016] As a preferred scheme, the inner side of the upper flange is provided with an equal-interval sawtooth structure to compensate for the thermal expansion of the inner side caused by high temperature.

[0017] As a specific embodiment, a forced circulation pump is arranged on the pipeline connecting the water inlet of the first heat exchange pipe with the steam drum.

[0018] Beneficial effects: compared with the prior art, the waste heat boiler is improved on the basis of the existing water jacket type cooler, the upper high temperature section is changed into an evaporator for generating saturated steam, and the lower low temperature section is changed into an economizer for generating hot water, and the hot water is used as make-up water of the waste heat boiler. The waste heat boiler adopts a mode that the heat exchange pipe directly contacts with high temperature solid, can effectively recover the high temperature sensible heat of the high temperature solid material, and generates steam. The heat exchange pipe is arranged in an "8" shape or an "elongated 8" shape, is expanded freely, effectively avoids the problems of the existing equipment, and achieves the purposes of saving energy and prolonging the service life of the equipment. In addition, compared with the original equipment, the size and position of the inlet and outlet flanges of the high temperature solid material waste heat boiler remain unchanged, and the high temperature solid material waste heat boiler can be directly connected with the original combustion section and the original collection section. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the waste heat boiler.

[0020] Figure 2 It is a "8" shape coil structure plane schematic view of the heat exchange pipe in the waste heat boiler (a material flow cross section is divided into two areas), wherein, the pipe 1, 2, 3, 4, 5 are in the first layer, the pipe 7 is in the second layer, the pipe 9 is in the third layer, the pipe 6 turns from the first layer to the second layer, the pipe 8 turns from the second layer to the third layer, and the pipe 1-2-3-4-5-6-7-8 completes a group.

[0021] Figure 3 It is a "elongated 8" shape coil structure plane schematic view of the heat exchange pipe in the waste heat boiler (a material flow cross section is divided into three areas), wherein, the pipe 1, 2, 3, 4, 5, 6, 7 are in the first layer, the pipe 9, 10, 11 are in the second layer, the pipe 13 is in the third layer, the pipe 8 turns from the first layer to the second layer, the pipe 12 turns from the second layer to the third layer, and the pipe 1-2-3-4-5-6-7-8-9-10-11-12 completes a group.

[0022] Figure 4 It is a structure schematic view of the upper flange in the waste heat boiler (a cross section view). DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with the drawings.

[0024] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0025] Embodiment 1

[0026] A high-temperature solid material waste heat boiler, as shown in Figure 1 It comprises a shield 1, a first heat exchange pipe 2, a second heat exchange pipe 3 and a steam drum 4; the shield 1 encloses a cylindrical structure for the flow of high-temperature solid material from top to bottom, the first heat exchange pipe 2 is located in the upper section inside the cylindrical structure, the second heat exchange pipe 3 is located in the lower section inside the cylindrical structure, and the first heat exchange pipe 2 and the second heat exchange pipe 3 are both coil pipe structures spiraling from top to bottom, independently separating the flow cross section of high-temperature solid material into several areas, the lower end opening of the first heat exchange pipe 2 is the water inlet, and the upper end opening is the water outlet, respectively connected with the steam drum 4 outside the cylindrical structure, and a forced circulation pump 9 is arranged on the pipeline connected with the steam drum 4; the upper end opening of the second heat exchange pipe 3 is connected with the steam drum 4, and the lower end opening is the water inlet connected with an independent water supply device. The pipe diameter of the first heat exchange pipe 2 is larger than that of the second heat exchange pipe 3, the first heat exchange pipe 2 is located in the upper high-temperature section and is used for generating steam, so the diameter is large, and the second heat exchange pipe 3 is located in the lower low-temperature section and is used for passing cooling water, so the diameter is smaller than that of the first heat exchange pipe 2.

[0027] The first heat exchange pipe 2 and the second heat exchange pipe 3 are independently "8" shaped coil pipe structures Figure 2 or "lengthened 8" shaped coil pipe structures Figure 3 The "8" shaped coil pipe structure separates the flow cross section of high-temperature solid material into two areas, and the "lengthened 8" shaped coil pipe structure separates the flow cross section of high-temperature solid material into two or more areas. The "lengthened 8" shape refers to connecting one or more enclosed areas based on the two enclosed areas of the "8" shape, thereby forming three or more multiple enclosed areas.

[0028] Specifically, the first heat exchange pipe 2 and the second heat exchange pipe 3, both include the pipe body close to the shield 1 and the pipe body forming the partition belt in the cylinder structure. The pipe body close to the shield 1 is provided with straight fins 5 on the pipe wall; the pipe body forming the partition belt is directly contacted between the upper and lower adjacent pipe bodies, forming an upper and lower overlapping structure. In addition, the uppermost pipe body of the pipe body forming the partition belt is provided with an anti-abrasion cover 6 on the top of the pipe wall, which can reduce the abrasion of the solid material to the pipe body.

[0029] As shown in Figure 1 The shield 1 includes an outer shield 101, a heat preservation layer 102 and an inner shield 103, and the heat preservation layer 102 is arranged between the outer shield 101 and the inner shield 103. The upper ends of the outer shield 101 and the inner shield 103 are connected with the upper flange 7 respectively, and the lower ends are connected with the lower flange 8 respectively. The inner side of the upper flange 7 is provided with an equal-interval sawtooth structure 701 to compensate for the thermal expansion of the inner side caused by high temperature; the inner side refers to the inner side of the upper flange 7, and the side in contact with the high-temperature solid particles, because of the contact with high temperature, the sawtooth expansion joint structure is increased, which can prevent the large expansion amount.

[0030] The working process and principle of the above-mentioned waste heat boiler are as follows:

[0031] The coal economizer (the second heat exchange pipe 3) heats the make-up water of the waste heat boiler and enters the steam drum 4, the water in the steam drum 4 is driven into the upper evaporator coil (the first heat exchange pipe 2) under the driving of the forced circulation pump 9, and the heat absorption becomes a steam-water mixture entering the steam drum 4, finally, the saturated steam in the steam drum 4 is sent out.

[0032] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-temperature solid material waste heat boiler, characterized in that, The application relates to a high-temperature solid material heat exchange device, which comprises a guard plate (1), a first heat exchange pipe (2), a second heat exchange pipe (3) and a steam pocket (4); the guard plate (1) is enclosed to form a cylinder structure for the flow of high-temperature solid materials from top to bottom; the first heat exchange pipe (2) is located in the upper section of the cylinder structure; the second heat exchange pipe (3) is located in the lower section of the cylinder structure; the first heat exchange pipe (2) and the second heat exchange pipe (3) are both coil pipe structures spirally arranged from top to bottom, and independently divide the flow section of the high-temperature solid materials into several areas; the water inlet and the water outlet of the first heat exchange pipe (2) are connected with the steam pocket (4) outside the cylinder structure; and the water outlet of the second heat exchange pipe (3) is connected with the steam pocket (4).

2. A high-temperature solid material waste heat boiler according to claim 1, characterised in that The first heat exchange pipe (2) and the second heat exchange pipe (3) are independently "8"-shaped coil pipe structures or "lengthened 8"-shaped coil pipe structures; the "8"-shaped coil pipe structure divides the flow section of the high-temperature solid materials into two areas; and the "lengthened 8"-shaped coil pipe structure divides the flow section of the high-temperature solid materials into more than two areas.

3. A high-temperature solid material waste heat boiler according to claim 1, characterised in that The first heat exchange pipe (2) and the second heat exchange pipe (3) both comprise pipe bodies closely attached to the guard plate (1) and pipe bodies forming a separation zone in the cylinder structure.

4. A high-temperature solid material waste heat boiler according to claim 3, characterised in that The pipe body closely attached to the guard plate (1) is provided with straight fins (5) on the pipe wall; the pipe bodies forming the separation zone are directly contacted between the upper and lower adjacent pipe bodies, and form an upper-and-lower-overlapping structure.

5. A high-temperature solid material waste heat boiler according to claim 3, characterised in that The uppermost pipe body forming the separation zone is provided with an anti-abrasion cover (6) on the top of the pipe wall.

6. A high-temperature solid material waste heat boiler according to claim 1, characterised in that The lower end opening of the first heat exchange pipe (2) is the water inlet, and the upper end opening is the water outlet, which are respectively connected with the steam pocket (4) outside the cylinder structure; the upper end opening of the second heat exchange pipe (3) is the water outlet, which is connected with the steam pocket (4); and the lower end opening is the water inlet, which is connected with an independent water supply device.

7. A high-temperature solid material waste heat boiler according to claim 1, characterised in that The guard plate (1) comprises an outer guard plate (101), a heat preservation layer (102) and an inner guard plate (103), and the heat preservation layer (102) is arranged between the outer guard plate (101) and the inner guard plate (103).

8. A high-temperature solid material waste heat boiler according to claim 7, characterised in that The upper ends of the outer guard plate (101) and the inner guard plate (103) are respectively connected with an upper flange (7), and the lower ends are respectively connected with a lower flange (8).

9. A high-temperature solid material waste heat boiler according to claim 8, characterised in that The inner side of the upper flange (7) is provided with equidistant sawtooth structures (701).

10. A high-temperature solid material waste heat boiler according to claim 1, characterised in that A forced circulation pump (9) is arranged on the pipeline connecting the water inlet of the first heat exchange pipe (2) with the steam pocket (4).

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