Outer disc type riser heat exchanger

Abstract

The utility model discloses an outer disc type ascension pipe heat exchanger which comprises a heat preservation shell and an inner cylinder which is arranged in the heat preservation shell and coaxially arranged, coils are sleeved on the inner cylinder, a plurality of heat conduction nails are arranged between adjacent coils on the inner cylinder at intervals, and heat conduction mud covering the coils and the heat conduction nails is filled between the heat preservation shell and the inner cylinder. A first flange is arranged at one end of the inner cylinder, a second flange is arranged at the other end of the inner cylinder, a plurality of supporting adjusting rods which are evenly distributed in the circumferential direction are arranged between the first flange and the second flange, and the supporting adjusting rods are arranged outside the inner cylinder; the supporting adjusting rod comprises a first threaded sleeve fixed to the first flange and a second threaded sleeve fixed to the second flange, the thread turning direction of an internal thread of the first threaded sleeve is opposite to that of an internal thread of the second threaded sleeve, and the first threaded sleeve and the second threaded sleeve are in threaded connection with a fixing rod. The problems that in the prior art, after an inner cylinder deforms due to temperature difference, heat conduction mud is loosened, and an ascending pipe collapses are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange energy saving, in particular to an outer disc type riser heat exchanger. Background Art

[0002] At present, the traditional method of the world's coking industry is to spray a large amount of 70℃~75℃ circulating ammonia water, which absorbs heat and evaporates in large quantities, so that the temperature of the raw gas can be reduced and enter the subsequent coal chemical product recovery and processing section. As a result, the heat brought by the raw gas is wasted, which not only loses the heat energy of the raw gas, but also increases the consumption of water resources. Therefore, it is necessary to transform the coke oven riser into a heat exchanger to reduce the temperature of the raw gas and achieve the purpose of energy saving.

[0003] Existing riser heat exchangers mostly use cold water to absorb the heat carried by raw gas and vaporize it to generate steam, thereby realizing the recovery and utilization of heat energy. The temperature of raw gas is generally around 800°C, while the temperature of the coke oven can reach 1200°C when the coke oven is air-dried. Common heat exchangers include an inner tube, a coil and an insulating outer shell. The coil is arranged on the inner tube and then coated with insulating mud. After being connected to the riser through the heat exchanger, the inner tube is used to bear the load. Due to the high temperature difference environment, the expansion between the inner tube and the thermal conductive mud is different, which can easily cause the thermal conductive mud to loosen and fall off. The deformation of the inner tube also causes the riser to collapse, causing a safety hazard. Utility Model Content

[0004] 1. Technical issues

[0005] The utility model aims to provide an outer disc type riser heat exchanger to solve the problems in the prior art that the inner tube is deformed due to temperature difference, causing the heat transfer mud to loosen and the riser to collapse.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An external disc riser heat exchanger comprises an insulating outer shell and an inner cylinder arranged coaxially inside the insulating outer shell, the inner cylinder being sleeved with a coil, a plurality of heat-conducting nails being arranged on the inner cylinder at intervals between adjacent coils, and heat-conducting mud covering the coils and the heat-conducting nails being filled between the insulating outer shell and the inner cylinder; a first flange is provided at one end of the inner cylinder, a second flange is provided at the other end of the inner cylinder, a plurality of support adjustment rods uniformly distributed along the circumferential direction are provided between the first flange and the second flange, the support adjustment rods being provided on the outside of the inner cylinder; the support adjustment rods comprise a first threaded sleeve fixed on the first flange and a second threaded sleeve fixed on the second flange, the internal thread of the first threaded sleeve and the internal thread of the second threaded sleeve having opposite thread rotation directions, and a fixing rod is threadedly connected to the first threaded sleeve and the second threaded sleeve.

[0009] Preferably, a water inlet flange is provided at the lower end of the coil, and a water outlet flange is provided at the upper end of the coil.

[0010] Preferably, the inner wall of the inner cylinder is provided with a high temperature resistant nano coating.

[0011] Preferably, the inner wall of the heat-insulating outer shell is provided with heat-insulating cotton.

[0012] Preferably, the second flange is threadedly connected to the inner cylinder, and the first flange is welded to the inner cylinder.

[0013] Preferably, the second flange and the inner tube are made of P91 material.

[0014] (III) Beneficial effects

[0015] By arranging a number of heat-conducting nails at intervals on the inner tube to support the thermal conductive mud, the connection stability between the thermal conductive mud and the inner tube is improved, the coil is covered, the heat exchange efficiency is improved, and the thermal conductive mud can be prevented from falling off due to the expansion of the inner tube and the thermal conductive mud.

[0016] At the same time, multiple support adjustment rods are arranged between the first flange and the second flange to support the upper and lower ends of the inner tube. Even if the inner tube is damaged due to long-term use, the first flange and the second flange can be supported by the support adjustment rods to avoid the collapse of the entire riser.

[0017] In addition, since the support adjustment rod can be adjusted in height relative to the first threaded sleeve and the second threaded sleeve through the fixed tube, it is used to compensate for the height difference caused by thermal expansion after a period of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is a partial cross-sectional structural schematic diagram of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the first flange, the second flange and the support adjustment rod in the embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the support adjustment rod in the embodiment of the utility model;

[0023] exist Figures 1 to 5 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0024] Insulation shell 1, inner tube 2, coil 3, heat-conducting nails 4, heat-conducting mud 5, first flange 6, second flange 7, support adjustment rod 8, first threaded sleeve 81, second threaded sleeve 82, fixing rod 83, water inlet flange 9, water outlet flange 10, high temperature resistant nano coating 11, and thermal insulation cotton 12. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figure 1-Figure 5 As shown, an external disc riser heat exchanger is proposed in the embodiment of the utility model, which is applied to the riser of the coke oven, and the operating parameters are: the raw gas inlet temperature is 800°C, the raw gas outlet temperature is ≤500°C, the steam working pressure is 2.0Mpa, the steam design pressure is 2.5Mpa, and the single-tube steam volume is 80-120kg / h. The specific heat exchanger includes a heat-insulating outer shell 1 and an inner tube 2 which is arranged coaxially in the heat-insulating outer shell 1. A coil 3 is sleeved on the inner tube 2. A plurality of heat-conducting nails 4 are arranged on the inner tube 2 at intervals between adjacent coils 3. A heat-conducting mud 5 covering the coils 3 and the heat-conducting nails 4 is filled between the heat-insulating outer shell 1 and the inner tube 2. The coils 3 are heat-conducted and heat-insulated by the heat-conducting mud 5. The raw gas passing through the inner tube 2 transfers the heat through the coil 3 to the water circulating inside to be converted into steam for heat recycling. The addition of the heat-conducting nails 4 can improve the heat-conducting effect and avoid the risk of the heat-conducting mud 5 falling off due to thermal expansion and contraction between the heat-conducting mud 5 and the inner tube 2.

[0027] Specifically, a first flange 6 is provided at one end of the inner tube 2, and a second flange 7 is provided at the other end of the inner tube 2. A plurality of support adjustment rods 8 evenly distributed along the circumferential direction are provided between the first flange 6 and the second flange 7. The support adjustment rods 8 are provided on the outside of the inner tube 2. The entire heat exchanger is installed in the riser through the first flange 6 and the second flange 7. After the inner tube 2 is damaged, the first flange 6 and the second flange 7 are supported by the support adjustment rods 8, thereby avoiding the risk of collapse of the entire riser.

[0028] Specifically, the support adjustment rod 8 includes a first threaded sleeve 81 fixed on the first flange 6 and a second threaded sleeve 82 fixed on the second flange 7. The internal thread of the first threaded sleeve 81 and the internal thread of the second threaded sleeve 82 have opposite thread rotation directions. The first threaded sleeve 81 and the second threaded sleeve 82 are threadedly connected with a fixing rod 83. The interval between the first threaded sleeve 81 and the second threaded sleeve 82 can be adjusted by rotating the fixing rod 83. After a certain period of time, the overall size will increase due to expansion. The length of the support adjustment rod 8 is adjusted to compensate for the expanded length, thereby ensuring the connection stability of the first flange 6 and the second flange 7. It should be noted that the corresponding expansion state can be adjusted after a period of use.

[0029] Specifically, a water inlet flange 9 is provided at the lower end of the coil 3, and a water outlet flange 10 is provided at the upper end of the coil 3. By arranging the water inlet end of the coil 3 at the bottom and the water outlet end at the top, the flow direction of water in the coil 3 is the same as the flow direction of the raw gas, thereby increasing the heat exchange contact distance and improving the heat exchange efficiency.

[0030] Specifically, a high temperature resistant nano coating 11 is provided on the inner wall of the inner tube 2 to improve the heat resistance of the inner tube 2. In addition, a heat insulation cotton 12 is provided on the inner wall of the heat insulation shell 1 to improve the heat insulation effect of the heat insulation mud and the coil 3.

[0031] The second flange 7 is threadedly connected to the inner tube 2, and the first flange 6 is welded to the inner tube 2. By threading the second flange 7 and the inner tube 2, welding stress on the second flange 7 can be avoided, thereby improving connection stability and durability.

[0032] Specifically, in order to improve the temperature resistance of the heat exchanger, the second flange 7 and the inner tube 2 are made of P91 material, that is, 0Cr9Mo1VNbN material, and the temperature resistance can be increased to 650° C., thereby improving the temperature resistance.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An external disc riser heat exchanger, characterized in that: It comprises a heat-insulating outer shell and an inner cylinder arranged coaxially in the heat-insulating outer shell, the inner cylinder is sleeved with a coil, a plurality of heat-conducting nails are arranged between adjacent coils on the inner cylinder, and the space between the heat-insulating outer shell and the inner cylinder is filled with heat-conducting mud covering the coil and the heat-conducting nails; A first flange is provided at one end of the inner tube, a second flange is provided at the other end of the inner tube, a plurality of support adjustment rods evenly distributed along the circumferential direction are provided between the first flange and the second flange, and the support adjustment rods are provided outside the inner tube; The support adjustment rod includes a first threaded sleeve fixed on the first flange and a second threaded sleeve fixed on the second flange. The internal thread of the first threaded sleeve and the internal thread of the second threaded sleeve have opposite thread rotation directions. A fixing rod is threadedly connected to the first threaded sleeve and the second threaded sleeve.

2. The outer disc riser heat exchanger according to claim 1, characterized in that: The lower end of the coil is provided with a water inlet flange, and the upper end of the coil is provided with a water outlet flange.

3. The outer disc riser heat exchanger according to claim 1, characterized in that: The inner wall of the inner cylinder is provided with a high temperature resistant nano coating.

4. The outer disc riser heat exchanger according to claim 3, characterized in that: The inner wall of the heat-insulating outer shell is provided with heat-insulating cotton.

5. An external disc riser heat exchanger according to any one of claims 1 to 4, characterized in that: The second flange is threadedly connected to the inner cylinder, and the first flange is welded to the inner cylinder.

6. The outer disc riser heat exchanger according to claim 5, characterized in that: The second flange and the inner tube are made of P91 material.

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