阅读说明：本技术 带液位平衡功能的物料蒸发器 (Material evaporator with liquid level balancing function ) 是由 杨辛洛 陶莲莉 曲向民 陈强 于 2019-12-10 设计创作，主要内容包括：本发明公开了一种带液位平衡功能的物料蒸发器,包括外壳,外壳内固定有溢流板和两套横管降膜蒸发装置,横管降膜蒸发装置包括横管蒸发机构、蒸汽分配室、蒸汽回转室和U形冷凝水排出机构,蒸汽分配室和蒸汽回转室分别位于横管蒸发机构的进汽端和出汽端,U形冷凝水排出机构位于蒸汽分配室内用于排出冷凝水和不凝气；所述外壳的顶部设置有蒸汽出口；外壳的底部固定有冷凝水排出口和两个物料循环桶,外壳的两侧壁上分别开设有物料循环进料口,两个物料循环进料口分别通过带泵管路与两个物料循环桶相通。本发明能够在空间占用小的前提下实现物料的梯级浓缩,同时还能够在排放冷凝水时保持蒸汽的密封,从而高效率完成物料的蒸发浓缩。(The invention discloses a material evaporator with a liquid level balancing function, which comprises a shell, wherein an overflow plate and two sets of transverse pipe falling film evaporation devices are fixed in the shell, each transverse pipe falling film evaporation device comprises a transverse pipe evaporation mechanism, a steam distribution chamber, a steam rotary chamber and a U-shaped condensed water discharge mechanism, the steam distribution chamber and the steam rotary chamber are respectively positioned at the steam inlet end and the steam outlet end of the transverse pipe evaporation mechanism, and the U-shaped condensed water discharge mechanism is positioned in the steam distribution chamber and used for discharging condensed water and non-condensed gas; a steam outlet is formed in the top of the shell; the bottom of shell is fixed with comdenstion water discharge port and two material circulation buckets, has seted up material circulation feed inlet on the both sides wall of shell respectively, and two material circulation feed inlets communicate with each other with two material circulation buckets through taking the pump pipeline respectively. The invention can realize the step concentration of the material on the premise of small occupied space, and simultaneously can keep the sealing of steam when discharging condensed water, thereby completing the evaporation concentration of the material with high efficiency.)

1. Take material evaporator of liquid level balance function, its characterized in that: the horizontal tube falling film evaporator comprises a shell (1), wherein an overflow plate (2) and two sets of horizontal tube falling film evaporation devices which are arranged side by side are fixedly arranged in the shell (1) along an axial lead, the overflow plate (2) is positioned at the bottom of the shell (1), and the two sets of horizontal tube falling film evaporation devices are respectively positioned at two sides above the overflow plate (2); the horizontal tube falling film evaporation device comprises a horizontal tube evaporation mechanism, a steam distribution chamber (3), a steam rotary chamber (4) and a U-shaped condensed water discharge mechanism (5), wherein the steam distribution chamber (3) and the steam rotary chamber (4) are respectively positioned at the steam inlet end and the steam outlet end of the horizontal tube evaporation mechanism, the U-shaped condensed water discharge mechanism is positioned in the steam distribution chamber (3), and the U-shaped condensed water discharge mechanism is connected with an upper horizontal tube (13) in the horizontal tube evaporation mechanism and is used for discharging condensed water and non-condensed gas; the top of the shell (1) is provided with steam outlets (6), and the steam outlets (6) are positioned in the two sets of horizontal pipe falling film evaporation devices; the bottom of the shell (1) is fixedly provided with a condensed water outlet (7) and two material circulating barrels (8), the condensed water outlet (7) is communicated with the steam distribution chambers (3) of the two sets of horizontal tube falling film evaporation devices, and the two material circulating barrels (8) are respectively positioned below the two sets of horizontal tube evaporation mechanisms; the two side walls of the shell (1) are respectively provided with a material circulating feed inlet (9), and the two material circulating feed inlets (9) are respectively communicated with the two material circulating barrels (8) through a pipeline (10) with a pump.

2. The material evaporator with the liquid level balancing function according to claim 1, wherein: the horizontal tube evaporation mechanism comprises end tube plates (11), side plates (12) and horizontal tubes (13), wherein the horizontal tubes (13) are uniformly fixed between the end tube plates (11) in a multi-row mode, the side plates (12) are fixed in the shell (1), and the end tube plates (11) are vertically fixed between the side plates (12) and the side walls of the shell (1).

3. The material evaporator with the liquid level balancing function according to claim 2, wherein: u-shaped comdenstion water discharge mechanism is including collecting cavity (14), U-shaped pipe (15), seal assembly and blast pipe (16) of taking the valve, it is hollow structure to collect cavity (14), the one end of collecting cavity (14) is fixed on end tube sheet (11) and is communicate with violently pipe (13) that are located end tube sheet (11) upper portion, seal assembly fixes the other end at end tube sheet (11), the lower part of collecting cavity (14) is used for discharging the comdenstion water in connection of U-shaped pipe (15), the upper portion of collecting cavity (14) is fixed to the one end of blast pipe (16), the other end stretches out steam distribution room (3) and is discharged noncondenstion gas by valve control.

4. The material evaporator with the liquid level balancing function according to claim 3, wherein: the sealing assembly comprises a fixed connecting flange (17), a movable connecting flange (18), a sealing gasket (19) and a baffle (20), the fixed connecting flange (17) is fixed on the collecting cavity (14), the movable connecting flange (18) is fixed on the fixed connecting flange (17) through bolts, and the sealing gasket (19) and the baffle (20) are fixed between the fixed connecting dust flange and the movable connecting flange (18).

5. The material evaporator with the liquid level balancing function according to claim 3, wherein: the bottom surface of the collecting cavity (14) is an inclined surface, and a U-shaped pipe (15) is connected to the lower end of the bottom surface.

6. The material evaporator with liquid level balancing function according to any one of claims 1 to 5, wherein: and a wire mesh demister (23) is fixedly arranged between the horizontal tube evaporation mechanisms in the shell (1).

7. The material evaporator with the liquid level balancing function according to claim 1, wherein: the two sets of horizontal tube falling film evaporation devices are characterized in that the steam distribution chambers (3) are formed by separating through a partition plate fixed in the shell (1), the steam distribution chambers (3) of the two sets of horizontal tube falling film evaporation devices are communicated with a condensate water outlet (7), and the steam distribution chambers (3) of the two sets of horizontal tube falling film evaporation devices are communicated with a steam input pipe (26).

8. The material evaporator with the liquid level balancing function according to claim 1, wherein: a cover plate (21) is fixed at one end of the shell (1) which is internally provided with the steam rotary chamber (4), and a manhole (22) is arranged on the cover plate (21).

9. The material evaporator with the liquid level balancing function according to claim 1, wherein: the shell (1) is of a square structure, supporting channel steel (24) are symmetrically fixed at the bottom of the shell (1), and reinforcing ribs (25) are uniformly distributed on the outer surface of the shell (1).

Technical Field

The invention relates to the technical field of heat exchange, in particular to a material evaporator with a liquid level balancing function.

Background

The horizontal tube falling film evaporation technology is that the feed liquid is added from the heating chamber of the falling film evaporator to the upper tube box, and is uniformly distributed into each heat exchange tube through the liquid distribution and film forming device, and flows from top to bottom in a uniform film shape under the action of gravity, vacuum induction and air flow. In the flowing process, the feed liquid exchanges heat with a transverse pipe with steam introduced into the transverse pipe, so that the aim of evaporation and concentration is fulfilled. At present, the horizontal tube falling film evaporation technology is widely applied to the evaporation and concentration of fluid material water in the industries of medicine, food, chemical industry, light industry and the like and the sewage treatment in the industries of steel, catalyst manufacturing, mines and the like due to good evaporation and concentration effect.

At present, cylindrical evaporators are adopted in a plurality of evaporators, such as forced circulation evaporators and seawater desalination evaporators; at present, the cylindrical evaporator can meet the requirements of material evaporation functions, but has the defects of not compact structure, low space utilization rate, large installation occupied area, high manufacturing cost and the like. In order to realize the cascade utilization of energy, the evaporators adopt multi-effect multi-stage evaporators which are connected in series, but the multi-effect multi-stage evaporators consume higher steam pressure and temperature gradient, which cannot be fused with the prior art which uses steam thermal compression to provide evaporation power.

The publication No. CN102107091A discloses a multistage high-efficiency horizontal-tube falling-film evaporator in No. 6/29/2011, which comprises two or more heat exchange tube bundles, wherein a separation box is arranged between the heat exchange tube bundles, and the number of heat exchange tubes contained in the tube bundles of the two or more heat exchange tube bundles is gradually reduced by 20-70% in the flow velocity direction of steam. The document utilizes a separation tank to separate the condensate from the steam, achieving the effect of improving the heat transfer coefficient of the condensate. And the heat exchange tube bundles of the front tube bundle and the rear tube bundle of the separation box are along the flow direction of the steam of the tube bundles, the number of the tubes in the front of the separation box is large, and the number of the tubes in the rear of the separation box is small. Therefore, the flow velocity in the pipe can be ensured to reach a relatively stable reasonable value. However, in the practical application process, as the multistage heat exchange tube bundles are sequentially arranged, the whole length is longer, and the occupied space is larger. The number of separation boxes is large, which results in a complex structure and high cost. And the structure that the condensate flows out through the separator box still leads to steam to discharge along with the condensate together easily, and then influences the heat exchange effect.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a material evaporator with a liquid level balancing function, which can realize the step concentration of materials on the premise of small occupied space and can keep the sealing of steam when condensed water is discharged, thereby completing the evaporation and concentration of the materials with high efficiency.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a take material evaporator of liquid level balance function which characterized in that: the horizontal pipe falling film evaporator comprises a shell, wherein an overflow plate and two sets of horizontal pipe falling film evaporation devices which are arranged side by side are fixedly arranged in the shell along an axial lead, the overflow plate is positioned at the bottom of the shell, and the two sets of horizontal pipe falling film evaporation devices are respectively positioned on two sides above the overflow plate; the horizontal tube falling film evaporation device comprises a horizontal tube evaporation mechanism, a steam distribution chamber, a steam rotary chamber and a U-shaped condensed water discharge mechanism, wherein the steam distribution chamber and the steam rotary chamber are respectively positioned at the steam inlet end and the steam outlet end of the horizontal tube evaporation mechanism; a steam outlet is formed in the top of the shell and is positioned between the two sets of horizontal tube falling film evaporation devices; the bottom of the shell is fixedly provided with a condensed water outlet and two material circulating barrels, the condensed water outlet is communicated with the steam distribution chambers of the two sets of horizontal tube falling film evaporation devices, and the two material circulating barrels are respectively positioned below the two sets of horizontal tube evaporation mechanisms; and material circulating feed inlets are respectively formed in two side walls of the shell, and the two material circulating feed inlets are respectively communicated with the two material circulating barrels through pipelines with pumps.

The horizontal tube evaporation mechanism comprises end tube plates, side plates and horizontal tubes, wherein the horizontal tubes are uniformly fixed between the end tube plates in a multi-row mode, the side plates are fixed in the shell, and the end tube plates are vertically fixed between the side plates and the side wall of the shell.

The U-shaped condensed water discharge mechanism comprises a collection cavity, a U-shaped pipe, a sealing assembly and an exhaust pipe with a valve, the collection cavity is of a hollow structure, one end of the collection cavity is fixed on an end pipe plate and communicated with a transverse pipe located on the upper portion of the end pipe plate, the sealing assembly is fixed at the other end of the end pipe plate, the U-shaped pipe is connected to the lower portion of the collection cavity and used for discharging condensed water, one end of the exhaust pipe is fixed on the upper portion of the collection cavity, and the other end of the exhaust pipe extends out of a steam distribution chamber and is.

The sealing assembly comprises a fixed connecting flange, a movable connecting flange, a sealing gasket and a baffle plate, the fixed connecting flange is fixed on the collecting cavity, the movable connecting flange is fixed on the fixed connecting flange through bolts, and the sealing gasket and the baffle plate are fixed between the fixed connecting flange and the movable connecting flange.

The bottom surface of the collecting cavity is an inclined plane, and the U-shaped pipe is connected to the lower end of the bottom surface.

And a wire mesh demister is fixedly arranged between the horizontal tube evaporation mechanisms in the shell.

The steam distribution chambers of the two sets of horizontal tube falling film evaporation devices are formed by separating through a partition plate fixed in the shell, the steam distribution chambers of the two sets of horizontal tube falling film evaporation devices are communicated with a condensate water outlet, and the steam distribution chambers of the two sets of horizontal tube falling film evaporation devices are communicated with a steam input pipe.

The cover plate is fixed at one end of the shell, which is internally provided with the steam rotary chamber, and a manhole is arranged on the cover plate.

The shell is of a square structure, supporting channel steel is symmetrically fixed at the bottom of the shell, and reinforcing ribs are uniformly distributed on the outer surface of the shell.

The invention has the advantages that:

1. the two sets of horizontal tube falling film evaporation devices separated by the overflow plate are arranged in the shell, the bottom of the shell is respectively provided with the material circulation barrel, the side wall of the shell is provided with the material circulation feed inlets respectively communicated with the material circulation barrel, and the stepped concentration of the material can be realized on the premise of small space occupation by the cooperation of the structures. Through the steam rotary chamber, the steam can be secondarily utilized, the utilization rate of the steam is improved, and the energy consumption is saved. And through U-shaped comdenstion water discharge mechanism not only can effectively discharge the steam condensate water, can also utilize the comdenstion water among the U-shaped comdenstion water discharge mechanism to make steam keep sealed to the material evaporation concentration function is accomplished to the high efficiency. In addition, the invention also has the advantages of compact structure, small installation occupation, lower manufacturing cost and the like.

2. The horizontal tube evaporation mechanism comprises end tube plates, side plates and horizontal tubes, wherein the horizontal tubes are uniformly fixed between the end tube plates in a plurality of rows, and the end tube plates are vertically fixed between the side plates and the side walls of the shell. The advantage of this structure lies in making two sets of violently pipe falling liquid film evaporation plant mutual independence, mutual noninterference during the concentration, and is better to the concentrated effect of material.

3. The U-shaped condensed water discharge mechanism comprises a collection cavity, a U-shaped pipe, an exhaust pipe with a valve and a sealing assembly, wherein the U-shaped pipe is used as a liquid discharge pipe, a certain amount of condensed water can be stored in the U-shaped pipe during liquid discharge, the partial condensed water can generate pressure difference in the U-shaped pipe to balance the liquid level, the condensed water exceeding the balance liquid level is discharged, and the steam is kept sealed. The exhaust pipe with the valve can control the discharge capacity of the non-condensable gas, so that the steam is controlled not to be discharged, and the heat of the steam is favorably and completely utilized. The sealing assembly is favorable for keeping the collection cavity sealed, and meanwhile, the disassembly of the sealing assembly is convenient for realizing the overhaul of the corresponding transverse pipe of the collection cavity.

4. The sealing assembly comprises a fixed connecting flange, a movable connecting flange, a sealing gasket and a baffle plate, and has the advantages of convenience in quick assembly and disassembly, good sealing performance and the like.

5. The bottom surface of the collecting cavity is set to be the inclined surface, the U-shaped pipe is connected to the lower end of the bottom surface, and the structure has the advantage that condensed water can be prevented from flowing back to the transverse pipe.

6. According to the invention, the wire mesh demister is fixedly arranged between the horizontal tube evaporation mechanisms, and the wire mesh demister can separate fog drops in steam, so that material loss is avoided.

7. In the invention, the steam distribution chambers of the two sets of horizontal tube falling film evaporation devices are communicated with the condensed water discharge port, and the steam distribution chambers of the two sets of horizontal tube falling film evaporation devices are communicated with the steam input pipe. This structure has the advantage of making the structure of the entire apparatus more compact.

8. The cover plate is fixed at one end of the steam rotary chamber arranged in the shell, and the equipment in the shell is protected by the cover plate, so that the safety of the equipment is improved. The manhole on the cover plate is beneficial to quickly overhauling equipment in the shell.

9. The shell is of a square structure, the supporting channel steel is symmetrically arranged at the bottom of the shell, and the reinforcing ribs are uniformly distributed on the outer surface of the shell.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a side cross-sectional structural schematic view of FIG. 1;

FIG. 3 is a schematic sectional view A-A of FIG. 1;

FIG. 4 is a schematic diagram of a horizontal tube falling film evaporator of the present invention viewed from the right within a shell;

FIG. 5 is a schematic top view of the present invention;

FIG. 6 is a schematic left side view of the three-dimensional structure of the present invention;

FIG. 7 is a schematic structural view of a U-shaped condensate discharge mechanism according to the present invention;

labeled as: 1. the shell, 2, the overflow plate, 3, the steam distribution room, 4, the steam gyration room, 5, U-shaped comdenstion water discharge mechanism, 6, steam outlet, 7, the comdenstion water discharge port, 8, the material circulation bucket, 9, the material circulation feed inlet, 10, the pipeline of taking the pump, 11, the end tube board, 12, the curb plate, 13, violently the pipe, 14, collect the cavity, 15, the U-shaped pipe, 16, the blast pipe, 17, decide flange, 18, move flange, 19, seal gasket, 20, the baffle, 21, the apron, 22, the manhole, 23, the silk screen demister, 24, support channel-section steel, 25, the strengthening rib, 26, the steam input pipe.

Detailed Description