CN207299981U - A kind of seawater distributor of open-frame type gasifier - Google Patents

Abstract

A seawater distributor for an open-frame gasifier relates to the field of open-frame gasifiers, including a seawater tank, the interior of the seawater tank is divided into a buffer zone, a distribution zone and an overflow zone by a partition, and a buffer device is arranged in the buffer zone. The buffer device includes a buffer seat, multiple buffer plates and buffer covers. Each buffer plate is fixed on the screw rod through a nut. The buffer seat is a cylindrical structure, and its lower end is fixed at the seawater inlet of the seawater tank. The multiple buffer plates are from bottom to bottom. The upper interval is arranged above the buffer seat, and the buffer cover is located above the uppermost buffer plate. The seawater on each buffer plate is arranged coaxially through holes and its diameter gradually decreases from bottom to top. The buffer cover consists of a trapezoidal folded plate and two The two straight plates are connected horizontally to the two bent ends of the trapezoidal folded plate. The distance between each buffer plate in the utility model is adjustable, which can adapt to fluctuations in the flow of seawater, ensure the stability of seawater flow, and facilitate the installation and maintenance of the buffer device.

Description

A seawater distributor for an open-frame gasifier

technical field

The utility model relates to the technical field of an open-frame gasifier, in particular to a seawater distributor for an open-frame gasifier.

Background technique

As a clean energy source, natural gas is getting more and more attention, and liquefied natural gas (LNG) grows rapidly every year, becoming one of the fastest growing energy industries in the world. As my country's demand for energy continues to grow, LNG plays an important role in optimizing my country's energy structure, effectively solving ecological and environmental protection problems, and achieving sustainable economic and social development. Natural gas is often stored and transported in liquid form, and before being transported to the end use, LNG needs to be vaporized to normal temperature gas with a gasifier.

Open Rack Vaporizer (ORV, Open Rack Vaporizer) is a vaporizer with seawater as the heat source. The basic unit of the vaporizer is a heat exchange tube, which is composed of several heat exchange tubes connected and arranged in a plate shape. The gas collector or liquid collector is welded to form a plate-shaped tube bundle unit, and then a gasifier is composed of several such units. There is a seawater distribution device on the top of the gasifier, which is used to spray seawater on the outer surface of the plate-shaped tube bundle from top to bottom. LNG flows in the heat exchange tube from bottom to top, absorbing the heat of seawater in the process and making it gasify. In order to ensure that LNG is evenly heated and avoid freezing on the outer surface of the lower part of the plate-shaped tube bundle, which will affect the heat exchange efficiency, the seawater distributor should ensure that the seawater is in the form of a uniform film on the surface of the plate-shaped tube bundle and descends along the tube bundle at a constant speed.

Patent CN 202166352 U - a seawater distributor for an open-frame gasifier, which adopts a combination of a rectangular buffer cover and a circular buffer cover. The patent application number is 201310349658.9 - a seawater distributor for an open-frame gasifier, which adopts an integral rectangular buffer cover with open holes. The seawater distributor for gasifier disclosed in the above patents has the following problems: 1. The structure of the rectangular bending buffer cover adopted by the distributor is complicated, it is difficult to manufacture and install, and it is easy to be damaged during use, and because the buffer cover is a whole The structure makes maintenance more difficult; 2. During installation and use, the buffer cover cannot adjust the spacing according to the change of seawater flow. When the seawater flow fluctuates significantly, it will affect the uniformity and stability of the liquid film.

Utility model content

The purpose of this utility model is to provide a seawater distributor for an open-frame gasifier. By optimizing the structure of the buffer device, it can adapt to the fluctuation of seawater flow, ensure the buffer effect, improve the stability of seawater flow, and at the same time make the buffer device Installation and maintenance become convenient.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a seawater distributor for an open-frame gasifier, which includes a seawater tank, and the inside of the seawater tank is provided with two longitudinal partitions along the length direction of the tank. There are several horizontal partitions between them, and two longitudinal partitions respectively form two overflow areas with the two longitudinal side plates of the sea tank, and the horizontal partition divides the area between the two longitudinal partitions into a buffer zone in the middle and two In the distribution area on the side, a buffer device is provided in the buffer zone. The buffer device includes a buffer seat, a plurality of buffer plates and a buffer cover. The buffer seat is a cylindrical structure, and its lower end is fixed at the seawater inlet of the seawater tank. The screw rods are connected with each other, the buffer cover is located above the uppermost buffer plate, each buffer plate is provided with seawater passage holes, the seawater passage holes on each buffer plate are coaxially arranged and its diameter gradually decreases from bottom to top, and the buffer The cover consists of a trapezoidal folded plate and two straight plates. The two straight plates are horizontally arranged at the two bent ends of the trapezoidal folded plate. Each buffer plate and buffer seat are fixedly connected to the screw through nuts, and the buffer cover is detachable and fixed. It is connected to the screw rod or detachably and fixedly connected to the two longitudinal partitions.

Preferably, a channel for seawater to flow from the buffer zone to the two distribution areas is provided between the lower edge of the two transverse partitions and the bottom of the seawater tank.

Preferably, a rectangular notch I is provided at the bottom of the two longitudinal partitions for the seawater in the distribution area to flow into the two overflow areas.

Preferably, a rectangular notch II for seawater to flow from the buffer zone to the two overflow regions is provided at the bottom of the two longitudinal partitions, and the area of the rectangular notch II is smaller than the area of the rectangular notch I.

Preferably, a connecting pipe is provided outside the seawater inlet, the inner diameter of the buffer seat is the same as that of the connecting pipe, and there are four buffer plates, which are grade I buffer board, grade II buffer board, and grade III buffer board from bottom to top. And the grade IV buffer plate, the diameter of the seawater passing hole of the grade I buffer plate is 75~85% of the inner diameter of the connecting pipe, the diameter of the seawater passing hole of the II buffer plate is 85~95% of the diameter of the seawater passing hole of the grade I buffer plate %, the diameter of the seawater passing hole of the grade III buffer plate is 75~85% of the diameter of the seawater passing hole of the grade I buffer plate, and the diameter of the seawater passing hole of the grade IV buffer plate is 90% of the diameter of the seawater passing hole of the grade III buffer plate ~100%.

Beneficial effect:

1. The buffer device of the present utility model adopts a multi-stage buffer plate structure, and each buffer plate is connected with the buffer seat by a screw, so that the distance between each buffer plate can be adjusted according to the fluctuation of the seawater flow in the actual working condition , effectively reducing the impact of seawater, ensuring the buffering effect, thereby improving the stability of seawater flow.

2. The buffer device adopts a non-integral welded structure, which is convenient for installation and maintenance, and does not need to be dismantled as a whole.

3. The buffer structures at all levels in the buffer device adopt the form of buffer plates, and cooperate with the buffer cover and the cylindrical buffer seat of the utility model in a bent form, so as to achieve a better buffer effect.

4. Further, the seawater in the buffer zone enters the distribution area through the bottom of the horizontal plate and cooperates with the buffer plate structure of the plate, which can further suppress the fluctuation in the flow of seawater and improve the buffering effect.

Description of drawings

Fig. 1 is a front structural schematic diagram of a seawater distributor for an open-frame gasifier of the present invention.

FIG. 2 is a schematic top view of the structure of FIG. 1 .

Fig. 3 is a schematic diagram of A-A in Fig. 1 .

Marked in the figure: 1. Connecting pipe, 2. Sea water tank, 3. H-shaped slot, 4. Concave slot, 5. Buffer zone, 6. Distribution area, 7. Overflow area, 8. Longitudinal partition , 9, transverse partition, 10, Ⅰ level buffer plate, 11, Ⅱ level buffer plate, 12, Ⅲ level buffer plate, 13, Ⅳ level buffer plate, 14, buffer cover, 15, screw, 16, buffer seat.

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in the figure, a seawater distributor for an open-frame gasifier includes a seawater tank 2, and the inside of the seawater tank 2 is provided with two longitudinal partitions 8 along the longitudinal direction of the tank, and two vertical partitions are arranged between the two longitudinal partitions 8. A transverse partition 9, two longitudinal partitions 8 respectively form two overflow areas 7 with the two longitudinal side plates of the seawater tank 2, and the area between the two longitudinal partitions 8 is separated by the two transverse partitions 9 as a buffer in the middle Zone 5 and distribution zone 6 on both sides. The edges of the two longitudinal side plates of the seawater tank 2 are bent outwards to form arc-shaped folds, which are used as overflow edges to divert the seawater from the two overflow areas 7 in the seawater tank 2 to the tube bundle of the ORV plate type On the surface. When the two longitudinal partitions 8 are relatively long, they can be divided into several sections of short boards to be connected. Specifically, several H-shaped slots 3 and several concave-shaped slots 4 can be welded in the seawater tank 2. The H-shaped slots 3 are used for installation and installation. To connect the short plates forming the longitudinal partitions 8 , the concave slots 4 are arranged on the opposite sides of the two longitudinal partitions 8 for installing and connecting the two transverse partitions 9 .

A buffer device is provided in the buffer zone 5, and the buffer device is used for buffering the seawater entering the buffer zone 5 from the bottom of the seawater tank 2. The buffer device includes a buffer seat 16, a plurality of buffer plates and a buffer cover 14. The buffer seat 16 is a cylindrical structure, and its lower end is fixed at the seawater inlet provided at the bottom of the seawater tank 2. The outside of the seawater tank 2 is connected with a The connecting pipe 1 for seawater tank 2 to input seawater. The upper and lower ends of the buffer seat 16 are welded with flanges, the diameter of the central opening of the flanges at the upper and lower ends is the same as the inner diameter of the connecting pipe 1, and the lower end flange is connected with the seawater inlet flange provided at the seawater inlet by bolts.

A plurality of buffer plates are arranged at intervals above the buffer seat 16 from bottom to top, and the buffer cover 14 is positioned above the uppermost buffer plate, and each buffer plate is provided with seawater passing holes, and the seawater passing holes on each buffer plate are coaxial set and its diameter gradually decreases from bottom to top.

The buffer cover 14 includes a trapezoidal folded plate portion and two straight plate portions, and the two straight plate portions are horizontally arranged at the two bent ends of the trapezoidal folded plate portion.

During specific production, the buffer cover 14 can be formed by connecting a trapezoidal folded plate (as a trapezoidal folded plate portion) and two straight plates (as a straight plate portion), and the two straight plates are horizontally connected to the two bent ends of the trapezoidal folded plate respectively; the buffer cover 14 can also be formed by integrally bending a rectangular plate.

Each buffer plate is fixed on the screw rod 15 by a nut, so that the height of each buffer plate can be adjusted by turning the nut. Wherein, screw rod 15 can be set to a plurality according to the situation, and each buffer plate is sleeved on the screw rod 15 by the screw rod hole that offers above it respectively, and adopts nut to be fixed on the suitable position of screw rod 15 on its upper and lower end faces, the bottom of screw rod 15 can be fixed On the flange of the upper end of the buffer seat 16. The buffer cover 14 is detachably and fixedly connected to the screw rod or detachably and fixedly connected to the two longitudinal partitions.

In this embodiment, there is one set of buffer devices. In practical applications, the number of buffer devices can be set in multiple sets according to the length of the seawater tank 2 . Specifically, a plurality of transverse partitions 9 are set in the seawater tank so as to set up multiple buffer zones and distribution areas, two sides of the buffer zone are distribution zones, and a set of buffer devices is set in one buffer zone.

The seawater enters the buffer zone 5 of the seawater tank 2 from the connecting pipe 1. After passing through the buffer seat 16, it passes through the buffer plates of various levels for buffering in sequence, and the last part reaches the buffer cover 14, and flows along the two straight plates on both sides of the buffer cover 14 to both sides. . Because the diameter of the seawater passage hole of each buffer plate decreases gradually from bottom to top, after the seawater flows out from the buffer seat 16, when it reaches each level of buffer plate, part of the seawater flows out from both sides of the level of buffer plate after being blocked. Part of the seawater reaches the next level of buffer plate through the seawater through the holes, and finally part of the seawater reaches the buffer cover 14 after being diverted by the multi-stage buffer plate, and flows horizontally along the two straight plates on both sides of the buffer cover 14 to both sides. When seawater passes through each level of buffer plate and buffer cover 14, the seawater flowing out from both sides quickly fills the buffer zone 5 and flows into the distribution area 6, then flows into the overflow area 7 from the distribution area 6, and finally flows from The overflow in the overflow zone 7 evenly and naturally overflows to the surface of the entire plate-shaped tube bundle of the open-frame gasifier, forming a stable liquid film.

In order to ensure that the final seawater can evenly and stably overflow from the overflow area, a stable liquid film is formed on the surface of the entire plate-shaped tube bundle of the open-frame gasifier. The seawater in the buffer zone 5 is from the bottom of the lower edge of the two transverse partitions 9 (i.e. through the passage provided between the transverse partition and the bottom of the seawater tank (this passage can be separated by reserving an interval at the bottom of the transverse partition and the seawater tank) Formed, the gap is preferably no more than one-third of the height of the super-high longitudinal partition) into the two distribution areas 6, and the seawater in the two distribution areas 6 flows into the two overflow areas 7 through the rectangular gap I provided at the bottom of the two longitudinal partitions 8.

The seawater in the buffer zone 5 can also partly communicate with the two overflow regions 7 through the rectangular gap II provided at the bottom of the two longitudinal partitions 8, and the opening of the rectangular gap II is smaller than the opening of the rectangular gap I. When the flow rate of seawater is large, the flow rate of seawater flowing out from both sides of the buffer cover 14 is relatively fast, which will form a vortex on the surface of the seawater in the buffer zone 5, and the two transverse partitions 9 passing through the two longitudinal partitions can effectively block the vortex from directly entering the distribution area. Zone 6, so that the seawater in the buffer zone 5 obtains the buffering effect again. The seawater in the upper layer of the distribution area 6 is separated from the overflow area 7 by a vertical partition 8 to ensure that the seawater surface of the overflow area 7 is not affected by the fluctuation of the sea water in the distribution area 6 and the buffer zone 5 . The heights of the two longitudinal baffles 8 and the two transverse baffles 9 can be adjusted according to the seawater flow, so as to avoid large eddies and fluctuations in the seawater in the distribution area and ensure the stability of the water surface in the overflow area. Utilizing the difference in the seawater drop between the distribution area 6 and the overflow area 7, the seawater can evenly and naturally overflow to the surface of the entire plate-shaped tube bundle along the overflow edge at the top of the two side plates of the seawater tank, forming a stable liquid film.

In order to achieve a better buffering effect for the buffer device, the inner diameter of the buffer seat 16 is the same as the inner diameter of the seawater inlet pipe 1, and there are four buffer plates, which are the first-level buffer plate 10 and the second-level buffer plate from bottom to top. 11. The grade III buffer plate 12 and the grade IV buffer plate 13, the diameter of the seawater passage hole of the grade I buffer plate is preferably 75~85% of the inner diameter of the seawater inlet pipe, and the diameter of the seawater passage hole of the grade II buffer plate is preferably grade I The diameter of the seawater passage hole of the buffer plate is 85~95%, the diameter of the seawater passage hole of the grade III buffer plate is preferably 75~85% of the diameter of the seawater passage hole of the grade I buffer plate, and the diameter of the seawater passage hole of the grade IV buffer plate It is preferably 90~100% of the diameter of the seawater passage hole of the Class III buffer plate.

In this embodiment, the diameter of the seawater passing hole of the first-level buffer plate is 80% of the inner diameter of the seawater inlet pipe, the diameter of the seawater passing hole of the second-level buffer plate is 90% of the diameter of the seawater passing hole of the first-level buffer plate, and the third-level The diameter of the seawater passing hole of the buffer plate is 80% of the diameter of the seawater passing hole of the first-grade buffer plate, and the diameter of the seawater passing hole of the fourth-grade buffer plate is the same as that of the third-grade buffer plate.

Claims (5)

1. a kind of seawater distributor of open-frame type gasifier, including a seawater groove, the coastal sink length side in seawater groove inside To equipped with two longitudinal baffles, being equipped with some lateral partitions between two longitudinal baffles, two longitudinal baffles respectively with seawater groove two Two overflow areas are formed between longitudinal side plate, the region between two longitudinal baffles is divided into the buffering area and two at middle part by lateral partitions The distribution area of side, buffering area is interior to be equipped with buffer unit, it is characterised in that：The buffer unit includes buffing pad, multiple bufferings Plate and buffer cover, buffing pad are tubular structure, its lower end is fixed at the seawater inlet of seawater groove setting, and multiple buffer boards are under The top of buffing pad is arranged at intervals on and, and by screw rod with being connected with each other, buffer cover is located at the upper of the buffer board of topmost Side, seawater is equipped with each buffer board by hole, the seawater on each buffer board be coaxially disposed by hole and its diameter from bottom to top It is gradually reduced, buffer cover includes a trapezoidal folded plate portion and two straight plate parts, and two straight plate parts are horizontally set on trapezoidal folding respectively Two bending ends of plate portion, each buffer board and buffing pad are fixedly connected by nut with screw rod, and buffer cover is detachably fixed connection On screw rod or it is detachably fixed and is connected on two longitudinal baffles.

A kind of 2. seawater distributor of open-frame type gasifier according to claim 1, it is characterised in that：Two lateral partitions Lower edge and seawater groove bottom between be equipped with the passage in two distribution areas flowed to from buffering area for seawater.

A kind of 3. seawater distributor of open-frame type gasifier according to claim 1, it is characterised in that：Two longitudinal direction every The bottom of plate is equipped with the rectangular notch I that two overflow areas are flowed into for distribution area's seawater.

A kind of 4. seawater distributor of open-frame type gasifier according to claim 3, it is characterised in that：Two longitudinal direction every Plate bottom is equipped with the rectangular notch II for flowing to two overflow areas from buffering area for seawater, and the area of rectangular notch II is less than rectangular notch I area.

A kind of 5. seawater distributor of open-frame type gasifier according to claim 1, it is characterised in that：In seawater inlet Outside is equipped with connecting tube, and the internal diameter of buffing pad is identical with the internal diameter of connecting tube, and buffer board is arranged to four, is followed successively by from bottom to top I grade of buffer board, II grade of buffer board, III grade of buffer board and IV grade of buffer board, a diameter of connection that the seawater of I grade of buffer board passes through hole The 75 ~ 85% of bore, the seawater of a diameter of I grade of buffer board that the seawater of II grade of buffer board passes through hole by bore dia 85 ~ 95%, the seawater for a diameter of I grade of buffer board that the seawater of III grade of buffer board passes through hole passes through the 75 ~ 85% of bore dia, IV grade of buffering The seawater for a diameter of III grade of buffer board that the seawater of plate passes through hole pass through bore dia 90 ~ 100%.