Novel evaporator for evaporating N2 in LNG (Liquefied Natural Gas) product

Abstract

The utility model provides a novel evaporator for evaporating N2 in LNG (liquefied natural gas) products, which comprises an evaporation box, an observation window and a liquid outlet box, the observation window is mounted on the front surface of the evaporation box, the liquid outlet box is mounted on the right side below the evaporation box, three exhaust valves are mounted on the right side surface of the evaporation box, and the right sides of the three exhaust valves are connected with exhaust pipes. A small exhaust fan is installed on the upper portion of the interior of the exhaust pipe, a liquid filtering box is installed on the left side of the upper portion of the evaporation box, a plurality of electric heating plates are installed in the evaporation box in a left-right staggered mode, three drawing frames are installed in the liquid filtering box, and a liquid filtering plate is installed on the lower portion of the interior of each drawing frame. Compared with the prior art, the device has the following beneficial effects that more uniform heat distribution can be realized by arranging the plurality of electric heating plates which are arranged in a left-right staggered manner, when LNG flows through the surfaces of the plurality of electric heating plates, more balanced heat can be received, and the heat can be more sufficiently transferred to the LNG, so that the efficiency and the stability of N2 evaporation are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to evaporator field, especially relate to a novel evaporator for evaporating N2 in LNG product. BACKGROUND

[0002] LNG is the abbreviation of Liquefied Natural Gas, and the main component of LNG is methane, and it also contains a small amount of ethane, propane and other components such as nitrogen, and N2 is nitrogen, and the evaporation of N2 (nitrogen) in LNG product refers to the process that part of nitrogen in liquid LNG is converted into gaseous state, however, in the prior art, the heating of N2 in LNG is uneven during evaporation, thereby bringing many shortcomings, first, the most direct influence is that it leads to incomplete evaporation of N2 in LNG, which will cause the product quality to decline, and it is impossible to meet the expected specifications and performance standards, because the content of N2 and the evaporation degree are very important for the use and subsequent processing of LNG, incomplete evaporation may affect its effect and safety in specific applications, and uneven heating may also cause energy waste, in order to fully evaporate N2, more energy may be needed to heat LNG, but due to uneven heating, over-heating in some areas and insufficient heating in other areas exist at the same time, and the overall energy utilization efficiency is reduced, in order to avoid these shortcomings, measures need to be taken to ensure the uniformity of heating during the evaporation of N2 in LNG, therefore, we have developed a novel evaporator for evaporating N2 in LNG product. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a novel evaporator for evaporating N2 in LNG product, which solves the problems raised in the background art.

[0004] The utility model discloses a novel evaporator for evaporating N2 in LNG product, which comprises an evaporation tank, an observation window and a liquid outlet tank, the evaporation tank is provided with an observation window on the front side, a liquid outlet tank is installed on the right side below the evaporation tank, and three exhaust valves are installed on the right side of the evaporation tank.

[0005] Three exhaust valves are connected with exhaust pipes on the right side, small exhaust fans are installed inside the exhaust pipes on the upper side, liquid filter tanks are installed on the left side above the evaporation tank, and a plurality of electric heating plates are installed in the evaporation tank in a staggered manner.

[0006] Three pull-out frames are installed inside the liquid filter tank, and one filter plate is installed in each pull-out frame on the lower side.

[0007] As a preferred embodiment, three insertion slots are formed in the left and right sides of the liquid filter tank, and the left and right sides of the three pull-out frames are slidably connected with the three insertion slots.

[0008] As a preferred implementation, three liquid inlet pipes are installed above the liquid filter tank, and three liquid outlet pipes are installed below the liquid outlet tank, and the liquid filter tank and the liquid outlet tank are both in communication with the interior of the evaporation tank.

[0009] As a preferred implementation, the three exhaust valves are all in communication with the interior of the evaporation tank and also in communication with the interior of the exhaust pipe.

[0010] As a preferred implementation, the observation window is made of tempered glass, and the upper surface of each electric heating plate is inclined.

[0011] As a preferred implementation, the three filtrate plates are, from top to bottom, a stainless steel filter screen, an alumina ceramic filter plate, and a polytetrafluoroethylene fiber filter screen.

[0012] After the above technical solution is adopted, the beneficial effects of the present application are as follows:

[0013] 1. By setting the liquid filter tank and the three filtrate plates, the LNG liquid can be finely filtered before entering the evaporation tank, preventing impurities mixed therein from entering the evaporation tank and affecting the evaporation effect, and significantly improving the evaporation efficiency.

[0014] 2. By setting multiple electric heating plates installed in a left-right staggered manner, more uniform heat distribution can be achieved, and the LNG can receive more balanced heat when flowing through the surfaces of the multiple electric heating plates, and the heat can be more fully transferred to the LNG, thereby ensuring the efficiency and stability of N2 evaporation. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0016] Fig. 1 It is a whole structure schematic diagram of the novel evaporator for evaporating N2 in LNG product.

[0017] Fig. 2 It is a structure schematic diagram in plan view of the novel evaporator for evaporating N2 in LNG product.

[0018] Fig. 3 It is a schematic diagram of the novel evaporator for evaporating N2 in LNG product in internal section view.

[0019] In the diagram, 1 is the evaporator; 2 is the observation window; 3 is the liquid filter box; 4 is the liquid inlet pipe; 5 is the pull-out frame; 6 is the liquid outlet box; 7 is the liquid outlet pipe; 8 is the exhaust valve; 9 is the exhaust pipe; 10 is the small exhaust fan; 11 is the electric heating plate; and 12 is the filter plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figs. 1 to 3 This utility model provides a technical solution: a novel evaporator for evaporating N2 in LNG products, comprising: an evaporation box 1, an observation window 2, and an outlet box 6. The observation window 2 is installed on the front of the evaporation box 1, and the outlet box 6 is installed on the lower right side below it. Three exhaust valves 8 are installed on the right side of the evaporation box 1.

[0022] Three exhaust valves 8 are connected to an exhaust pipe 9 on the right side. A small exhaust fan 10 is installed inside the exhaust pipe 9 at the top. A liquid filter box 3 is installed on the left side above the evaporator 1. Multiple electric heating plates 11 are installed alternately on the left and right sides inside the evaporator 1.

[0023] The liquid filter box 3 has three pull-out frames 5 installed inside, and a filter plate 12 is installed at the bottom of each of the three pull-out frames 5.

[0024] The liquid filter box 3 has three slots on the left and right sides of its interior, and the three pull-out frames 5 are slidably connected to the three slots on the left and right sides respectively.

[0025] Three inlet pipes 4 are installed above the liquid filter tank 3, and three outlet pipes 7 are installed below the outlet tank 6. Both the liquid filter tank 3 and the outlet tank 6 are connected to the interior of the evaporator 1.

[0026] All three exhaust valves 8 are connected to the interior of the evaporator 1 and also to the interior of the exhaust pipe 9.

[0027] The observation window 2 is made of tempered glass, and the upper surface of each electric heating plate 11 is inclined.

[0028] The three filter plates 12, from top to bottom, are a stainless steel filter screen, an alumina ceramic filter plate, and a polytetrafluoroethylene fiber filter screen.

[0029] Please see Figs. 1 to 3As the first embodiment of this utility model: LNG liquid is introduced into the inlet pipe 4. The LNG liquid can enter the liquid filter tank 3 through the inlet pipe 4. When the LNG liquid passes through three filter plates 12, the stainless steel filter screen first filters out the larger impurities mixed in it. After the first filtration, the LNG liquid passes through the alumina ceramic filter plate to filter out the smaller impurities. After the second filtration, the LNG liquid passes through the polytetrafluoroethylene fiber filter screen to filter out the even smaller impurities. In this way, the impurities mixed in the LNG liquid can be finely filtered three times to make it purer and prevent impurities from entering the evaporation tank 1 and affecting the evaporation effect, thereby improving the efficiency of N2 evaporation.

[0030] Please see Figs. 1 to 3 As a second embodiment of this utility model: According to a further description of the first embodiment, after the LNG liquid is filtered, it enters the evaporation tank 1. The electric heating plate 11 can be energized and heated in advance, and the interior of the evaporation tank 1 can be heated at the same time. The LNG liquid can flow from top to bottom and left to right above the multiple electric heating plates 11. When the LNG liquid flows, the high temperature inside the evaporation tank 1 and the high temperature on the surface of the electric heating plate 11 can heat the LNG liquid, thereby promoting the evaporation of N2. During the evaporation process, the exhaust valve 8 can be opened and the small exhaust fan 10 can be started. After the small exhaust fan 10 is started, it can draw the steam generated by the evaporation of N2 inside the evaporation tank 1 through the three exhaust valves 8 and discharge it to the outside through the exhaust pipe 9. At the same time, the LNG liquid can be discharged from the liquid outlet tank 6 into the liquid outlet pipe 7 and discharged to the outside through the liquid outlet pipe 7.

[0031] Through the above steps, the final effect is that the staggered arrangement of multiple electric heating plates 11 results in a wider and more uniform heating area. The LNG liquid flows from top to bottom and left to right above the multiple electric heating plates 11, increasing the contact opportunities and area with the heating plates, reducing heating dead zones, and thus achieving more uniform heating. At the same time, the electric heating plates 11 are preheated and the interior of the evaporation tank 1 is also heated simultaneously, providing a dual heating source, increasing the total heat input, thereby accelerating the heating rate of the LNG liquid and improving the evaporation efficiency.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel evaporator for evaporating N2 in LNG products, comprising: An evaporator (1), an observation window (2) and a liquid outlet tank (6) are provided. The evaporator (1) has an observation window (2) installed on its front side and a liquid outlet tank (6) installed on its lower right side. The evaporator (1) is characterized by having three exhaust valves (8) installed on its right side. The three exhaust valves (8) are connected to an exhaust pipe (9) on the right side. A small exhaust fan (10) is installed inside the exhaust pipe (9) at the top. A liquid filter box (3) is installed on the left side above the evaporator (1). Multiple electric heating plates (11) are installed alternately on the left and right sides inside the evaporator (1). The liquid filter box (3) is equipped with three pull-out frames (5), and a filter plate (12) is installed at the bottom of each of the three pull-out frames (5).

2. The novel evaporator for evaporating N2 in LNG products as described in claim 1, characterized in that: The liquid filter box (3) has three slots on its left and right sides, and the three pull-out frames (5) are slidably connected to the three slots on their left and right sides respectively.

3. A novel evaporator for evaporating N2 in LNG products as described in claim 2, characterized in that: The liquid filter box (3) is equipped with three inlet pipes (4) above it and three outlet pipes (7) are installed below it. Both the liquid filter box (3) and the outlet box (6) are connected to the interior of the evaporator (1).

4. A novel evaporator for evaporating N2 in LNG products as described in claim 3, characterized in that: All three exhaust valves (8) are connected to the interior of the evaporator (1) and also to the interior of the exhaust pipe (9).

5. A novel evaporator for evaporating N2 in LNG products as described in claim 4, characterized in that: The observation window (2) is made of tempered glass, and the upper surface of each of the electric heating plates (11) is inclined.

6. A novel evaporator for evaporating N2 in LNG products as described in claim 1, characterized in that: The three filter plates (12) are, from top to bottom, a stainless steel filter screen, an alumina ceramic filter plate, and a polytetrafluoroethylene fiber filter screen.

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