Winding type heat exchanger for LNG (Liquefied Natural Gas) cold box

Abstract

The winding type heat exchanger for the LNG cold box comprises a box body, a cleaning mechanism is arranged in the box body, the cleaning mechanism comprises two supporting rods, a fixing rod, a lead screw, a sliding block, a threaded hole and a round hole which are arranged in the box body, a circular ring is arranged at the end, away from the box body, of the sliding block, a plurality of bristles are arranged in the circular ring, and the bristles are arranged in the box body. A lower cylinder seal head is arranged at the bottom of the box body, a rotating motor corresponding to the lead screw is arranged at the bottom of the lower cylinder seal head, and the rotating motor is connected with the lead screw through a coupler. According to the winding type heat exchanger for the LNG cold box, not only can materials be transported, but also stains on the heat exchange pipe can be cleaned, so that the working efficiency of the heat exchange pipe is improved, and the overall using effect and the overall using function efficiency of the device are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of a winding type heat exchange device for an LNG cold box, in particular to a winding type heat exchanger for an LNG cold box. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. The wound heat exchanger used in LNG cold box is a key equipment in natural gas liquefaction engineering projects. During the use of existing heat exchangers, when the heat exchanger is used for too long, a large amount of dirt will be generated on the heat exchanger tube wall, which will affect the normal temperature transfer of the device, thereby affecting the overall use effect and overall efficiency of the device.

[0003] For example, the utility model with announcement number CN105674773B discloses a wound heat exchanger for an LNG cold box. The technical solution of this patent includes a heat exchanger body, which includes a shell. An upper tube sheet and a lower tube sheet are respectively provided at the upper and lower ends of the shell. A central tube is coaxially provided inside the shell, and a heat exchange tube is spirally wound on the outer side of the central tube; a refrigerant inlet and a medium outlet are provided at the upper tube sheet, a medium inlet is provided at the lower tube sheet, and a refrigerant outlet is provided at the lower part of the shell. Both ends of the heat exchange tube are respectively connected to the medium inlet and the medium outlet. During the use of this device, more stains will be deposited on the heat exchange tube in the box after a period of time, which will lead to a reduction in the heat transfer effect of the heat exchange tube, thereby affecting the overall use effect and overall efficiency of the device. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art and provides a wound heat exchanger for an LNG cold box, which can not only transport materials but also clean stains on the heat exchange tubes, thereby increasing the working efficiency of the heat exchange tubes and improving the overall use effect and overall functional efficiency of the device.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wound heat exchanger for an LNG cold box, comprising a box body, a cleaning mechanism is arranged inside the box body, the cleaning mechanism comprises two support rods arranged inside the box body, the two support rods are welded to the box body, a fixing rod is arranged between the two support rods close to the box body, the fixing rod and the support rod are welded to each other, a lead screw is arranged between the two support rods away from the box body, a slider passed by the fixing rod is arranged on the lead screw, a threaded hole corresponding to the lead screw is arranged on the slider, a circular hole corresponding to the fixed rod is also arranged on the slider, a circular ring is arranged at one end of the slider away from the box body, a plurality of bristles are arranged in the circular ring, a lower cylinder head is arranged at the bottom of the box body, a rotating motor corresponding to the lead screw is arranged at the bottom of the lower cylinder head, and the rotating motor and the lead screw are connected by a coupling.

[0006] As a further improvement of the utility model, a lower tube box head is provided at the bottom of the lower cylinder head, a tube side inlet is provided at the bottom of the lower tube box head, a shell side outlet is provided at the bottom side end of the box body, and a lower reinforcing rib is provided between the tube side inlet and the lower tube box head, and the lower reinforcing rib is welded to the tube side inlet and the lower tube box head.

[0007] As a further improvement of the utility model, an upper cylinder head is arranged on the top of the box body, an upper tube plate is arranged on the top of the upper cylinder head, an upper tube box head is arranged on the top of the upper tube plate, a tube side outlet is arranged on the top of the upper tube box head, a shell side inlet is arranged on the top side end of the box body, a support is arranged in the middle of the box body, a plurality of upper reinforcing ribs are arranged between the tube side outlet and the upper tube box head, and the upper reinforcing ribs are welded to the tube side outlet and the upper tube box head.

[0008] As a further improvement of the utility model, a central axis is arranged in the middle of the box body, a plurality of wound heat exchange tube bundles are arranged on the periphery of the central axis, and a fixing plate for fixing the wound heat exchange tube bundles is arranged inside the top of the box body.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] First, the rotating motor is started. The rotation of the rotating motor drives the lead screw to rotate. The rotation of the lead screw drives the slider to slide on the fixed rod, thereby driving the ring set at the bottom of the slider to move up and down, thereby driving the bristles to clean the wrapped heat exchange tube bundle.

[0011] Secondly, a plurality of upper reinforcing ribs are arranged between the pipe pass outlet and the upper pipe box head, and a lower reinforcing rib is arranged between the pipe pass inlet and the lower pipe box head. The arrangement of the two reinforcing ribs makes the structure more stable.

[0012] Thirdly, the lower tube box head and the upper tube box head are arranged in an arc shape, so that the structure of the device is more stable under the impact of the internal liquid.

[0013] Fourthly, the rotating motor is arranged outside the box to prevent the liquid in the box from interfering with the rotating motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 It is a partial enlarged structural schematic diagram of B of the utility model;

[0018] Figure 4 It is a schematic diagram of the partially enlarged structure of point A of the present utility model.

[0019] In the figure: 101, box body; 102, support rod; 103, fixing rod; 104, screw; 105, slider; 106, ring; 107, brush; 108, rotating motor; 109, lower cylinder head; 110, lower tube box head; 111, tube side inlet; 112, lower reinforcing rib; 113, shell side outlet; 114, upper cylinder head; 115, upper tube sheet; 116, upper tube box head; 117, tube side outlet; 118, upper reinforcing rib; 119, support; 120, center axis; 201, wrapped heat exchange tube bundle; 202, fixing plate; 203, shell side inlet. DETAILED DESCRIPTION

[0020] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0021] like Figure 1 , 2As shown in 4, a wound heat exchanger for an LNG cold box includes a box body 101, a cleaning mechanism is arranged inside the box body 101, and the cleaning mechanism includes two support rods 102 arranged inside the box body 101, the two support rods 102 are welded to the box body 101, a fixing rod 103 is arranged between the two support rods 102 close to the box body 101, the fixing rod 103 is welded to the support rod 102, and a lead screw 104 is arranged between the two support rods 102 away from the box body 101, and a fixed rod 104 is arranged on the lead screw The fixed rod 103 passes through a slider 105, and a threaded hole corresponding to the lead screw 104 is provided on the slider 105. The slider 105 is also provided with a round hole corresponding to the fixed rod 103. A ring 106 is provided at the end of the slider 105 away from the box body 101, and a plurality of bristles 107 are provided in the ring 106. A lower cylinder head 109 is provided at the bottom of the box body 101, and a rotating motor 108 corresponding to the lead screw 104 is provided at the bottom of the lower cylinder head 109. The rotating motor 108 is connected to the lead screw 104 through a coupling.

[0022] like Figure 1 , 2 As shown, a lower tube box head 110 is provided at the bottom of the lower cylinder head 109, a tube side inlet 111 is provided at the bottom of the lower tube box head 110, a shell side outlet 113 is provided at the bottom side end of the box body 101, a lower reinforcing rib 112 is provided between the tube side inlet 111 and the lower tube box head 110, and the lower reinforcing rib 112 is welded to the tube side inlet 111 and the lower tube box head 110.

[0023] like Figure 1 , 3 As shown, an upper cylinder head 114 is provided on the top of the box body 101, an upper tube sheet 115 is provided on the top of the upper cylinder head 114, an upper tube box head 116 is provided on the top of the upper tube sheet 115, a tube side outlet 117 is provided on the top of the upper tube box head 116, a shell side inlet 203 is provided on the top side end of the box body 101, a support 119 is provided in the middle of the box body 101, a plurality of upper reinforcing ribs 118 are provided between the tube side outlet 117 and the upper tube box head 116, and the upper reinforcing ribs 118 are welded to the tube side outlet 117 and the upper tube box head 116.

[0024] like Figure 1 , 2 As shown in FIG. 3 , a central axis 120 is provided in the middle of the box body 101 , a plurality of wound heat exchange tube bundles 201 are provided on the periphery of the central axis 120 , and a fixing plate 202 for fixing the wound heat exchange tube bundles 201 is provided on the top of the box body 101 .

[0025] The user first starts the rotating motor 108. The rotation of the rotating motor 108 drives the lead screw 104 to rotate. The rotation of the lead screw 104 drives the slider 105 to slide on the fixed rod 103, thereby driving the ring 106 set at the bottom of the slider 105 to move up and down, thereby driving the bristles 107 to clean the wrapped heat exchange tube bundle 201. A plurality of upper reinforcing ribs 118 are arranged between the tube outlet 117 and the upper tube box head 116, and a lower reinforcing rib 112 is arranged between the tube inlet 111 and the lower tube box head 110. The arrangement of the two reinforcing ribs makes the structure more stable.

[0026] The lower tube box head 110 and the upper tube box head 116 are arranged in an arc shape to make the structure of the device more stable under the impact of the internal liquid. The rotating motor 108 is arranged on the outside of the box body 101 to prevent the liquid in the box body 101 from interfering with the rotating motor 108.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A wound heat exchanger for an LNG cold box, comprising a box body (101), Features: A cleaning mechanism is arranged inside the box (101), and the cleaning mechanism comprises two support rods (102) arranged inside the box (101); a fixing rod (103) is arranged between the two support rods (102) close to the box (101); a lead screw (104) is arranged between the two support rods (102) away from the box (101); a slider (105) is arranged on the lead screw (104) and is passed through by the fixing rod (103); a screw corresponding to the lead screw (104) is arranged on the slider (105); The slider (105) is provided with a circular hole corresponding to the fixed rod (103); a circular ring (106) is provided at one end of the slider (105) away from the box body (101); a plurality of bristles (107) are provided in the circular ring (106); a lower cylinder head (109) is provided at the bottom of the box body (101); a rotating motor (108) corresponding to the lead screw (104) is provided at the bottom of the lower cylinder head (109); and the rotating motor (108) and the lead screw (104) are connected via a coupling.

2. The wound heat exchanger for LNG cold box according to claim 1, Features: A lower tube box head (110) is provided at the bottom of the lower cylinder head (109), a tube side inlet (111) is provided at the bottom of the lower tube box head (110), a shell side outlet (113) is provided at the bottom side end of the box body (101), and a lower reinforcing rib (112) is provided between the tube side inlet (111) and the lower tube box head (110).

3. The wound heat exchanger for LNG cold box according to claim 2, Features: An upper cylinder head (114) is arranged on the top of the box body (101), an upper tube plate (115) is arranged on the top of the upper cylinder head (114), and an upper tube box head (116) is arranged on the top of the upper tube plate (115).

4. The wound heat exchanger for LNG cold box according to claim 3, Features: A tube-side outlet (117) is arranged at the top of the upper tube box head (116), a shell-side inlet (203) is arranged at the top side end of the box body (101), a support (119) is arranged in the middle of the box body (101), and a plurality of upper reinforcing ribs (118) are arranged between the tube-side outlet (117) and the upper tube box head (116).

5. The wound heat exchanger for LNG cold box according to claim 4, Features: A central axis (120) is arranged in the middle of the box body (101), and a plurality of wound heat exchange tube bundles (201) are arranged on the periphery of the central axis (120).

6. The wound heat exchanger for LNG cold box according to claim 5, Features: A fixing plate (202) for fixing the wound heat exchange tube bundle (201) is arranged inside the top of the box body (101).

7. The wound heat exchanger for LNG cold box according to claim 6, Features: The two support rods (102) are respectively connected to the box body (101) by welding, and the fixing rod (103) and the support rod (102) are connected by welding. Welding connection: the lower reinforcing rib (112) is welded to the pipe inlet (111) and the lower pipe box head (110). The upper reinforcing rib (118) is welded to the pipe outlet (117) and the upper pipe box head (116).

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