Automatic descaling evaporator

Abstract

The utility model provides an automatic descaling evaporator. The automatic descaling evaporator comprises a tank body, an evaporation assembly and a descaling mechanism, the evaporation assembly is arranged in the inner cavity of the tank body; a filling material cavity is formed between the evaporation assembly and the top of the inner cavity of the tank body, and a concentrated material cavity is formed between the evaporation assembly and the bottom of the inner cavity of the tank body; the filling material cavity is respectively communicated with the concentrated material cavity through a plurality of heating pipes of the evaporation assembly; the descaling mechanism comprises a spraying and sweeping assembly and a lifting driver; the spraying and sweeping assembly is arranged in the filling material cavity, and is convexly provided with a plurality of nozzles towards the evaporation assembly; each spray head is arranged opposite to the feeding hole of the corresponding heating pipe; the lifting driver is mounted at the top of the tank body, and a telescopic rod of the lifting driver is connected to the spraying and sweeping assembly, so that each spray head can be inserted into a feeding hole of the corresponding heating pipe, gas or liquid is sprayed into the heating pipe through the spray heads and can touch the whole area of the inner wall of the heating pipe, and cleaning dead angles of the inner wall of the heating pipe are reduced; and the heating pipe can be cleaned more cleanly.

Description

Technical Field

[0001] The present disclosure relates to the technical field of chemical equipment, and particularly to an automatic descaling evaporator. Background Art

[0002] In the process of chemical production, it is usually necessary to adopt the method of evaporation crystallization to purify the slurry. The current evaporation crystallizer mainly purifies the slurry through the heat exchange between the heating tubes and the slurry. However, for some slurries containing salts or high viscosity slurries such as polyvinylidene fluoride, etc., it is very easy to adhere to the heating tubes, deposit scale, and cause pipe blockage. In response to this problem, some manufacturers have made further research and development.

[0003] For example, Chinese Patent Document CN107875658A discloses a wave-flow valve automatic cleaning vertical tube falling film evaporator, which includes an automatic cleaning mechanism for the dirt in the heating tubes composed of a wave-flow valve, a coupling spring and a cleaning spiral. The wave-flow valve and the coupling spring form the head of the automatic cleaning mechanism, and the cleaning spiral is the working element for cleaning the dirt; the cross-sectional area between the large tube section and the small tube section of the wave-flow valve and the inner wall of the inlet section of the heating tube changes, so as to realize the alternating change of the flow rate, thereby driving the cleaning spiral to move up and down, rotate in the positive and negative directions and vibrate frequently in the radial direction, so as to realize the cleaning of the heating tubes.

[0004] However, the above design of the wave-flow valve automatic cleaning vertical tube falling film evaporator has the following problems:

[0005] For the above wave-flow valve automatic cleaning vertical tube falling film evaporator, although it can remove scale by vibrating the cleaning spiral in the heating tubes, due to the limitation of the cleaning spiral structure, the inner wall area of the heating tubes that the cleaning spiral can touch during vibration is limited, and there are many cleaning dead corners. At the same time, the vibration of the cleaning spiral in the heating tubes will also hinder the flow of the slurry and reduce the evaporation efficiency. Utility Model Content

[0006] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide an automatic descaling evaporator with fewer cleaning dead corners and convenient use.

[0007] The purpose of the present disclosure is achieved by the following technical solutions:

[0008] An automatic descaling evaporator includes a tank body and an evaporation assembly; the evaporation assembly is arranged in the inner cavity of the tank body; a perfusion material cavity is formed between the evaporation assembly and the top of the inner cavity of the tank body, and a concentrated material cavity is formed between the evaporation assembly and the bottom of the inner cavity of the tank body; the perfusion material cavity is respectively communicated with the concentrated material cavity through a plurality of heating tubes of the evaporation assembly;

[0009] The automatic descaling evaporator further includes a descaling mechanism;

[0010] The descaling mechanism includes a spraying and sweeping assembly and a lifting drive; the spraying and sweeping assembly is disposed in the perfusion material cavity, and a plurality of nozzles protrude towards the evaporation assembly; each of the nozzles is disposed opposite to the feed port of one of the heating tubes; the lifting drive is installed on the top of the tank body, and the telescopic rod of the lifting drive is connected to the spraying and sweeping assembly, so that each of the nozzles approaches and inserts or withdraws away from the feed port of the corresponding heating tube.

[0011] In one embodiment, the spraying and sweeping assembly includes a mounting frame, a telescopic hose, and an annular conduit; the annular conduit is disposed on the mounting frame, and the mounting frame is connected to the telescopic rod of the lifting drive; a plurality of the nozzles are spaced apart and distributed on the annular conduit and communicate with the inside of the annular conduit; the telescopic hose is disposed on the annular conduit, and two ends of the telescopic hose communicate with the spraying liquid inlet of the tank body and the annular conduit respectively.

[0012] In one embodiment, the mounting frame includes a supporting disc and a push rod; the push rod is disposed at the central position of the supporting disc and is connected to the telescopic rod of the lifting drive; the annular conduit is disposed around the push rod, and a plurality of the nozzles respectively penetrate and are fixedly connected to the supporting disc.

[0013] In one embodiment, a contact convex portion is disposed on the periphery of the supporting disc, and a wall hanging plate is provided on the cavity wall of the perfusion material cavity; the wall hanging plate is close to the evaporation assembly and is disposed opposite to the contact convex portion.

[0014] In one embodiment, both the number of the annular conduits and the number of the telescopic hoses are multiple, and the multiple annular conduits are concentrically arranged from inside to outside, and each of the annular conduits communicates with the spraying liquid inlet of the corresponding tank body through one of the telescopic hoses.

[0015] In one embodiment, the evaporation assembly includes an upper partition plate, a plurality of the heating tubes, and a lower partition plate which are connected in sequence from top to bottom; the upper partition plate and the lower partition plate are respectively connected to the inner cavity wall of the tank body, a perfusion material cavity is formed between the upper partition plate and the top of the inner cavity of the tank body, and a concentrated material cavity is formed between the lower partition plate and the bottom of the inner cavity of the tank body; the feed ports of the heating tubes are spaced apart and distributed on the upper partition plate and communicate with the perfusion material cavity; the discharge ports of the heating tubes are spaced apart and distributed on the lower partition plate and communicate with the concentrated material cavity.

[0016] In one embodiment, the upper partition plate and the lower partition plate are respectively hermetically embedded in the inner cavity wall of the tank body. A vapor heat exchange cavity is formed between the upper partition plate and the lower partition plate. A plurality of the heating tubes are arranged at intervals in the vapor heat exchange cavity; the feeding end of each heating tube is connected to the upper partition plate, and a feeding port is formed; the discharging end of each heating tube is connected to the lower partition plate, and a discharging port is formed.

[0017] In one embodiment, a vapor inlet and a cold spray water outlet are respectively formed on the cavity wall of the vapor heat exchange cavity. The vapor inlet is arranged near the feeding end of the heating tube, and the cold spray water outlet is arranged near the discharging end of the heating tube.

[0018] In one embodiment, the automatic descaling evaporator further includes a scraping and conveying assembly; the scraping and conveying assembly includes a rotation driver and a descaling plate. The rotation driver is installed at the bottom of the tank body; the descaling plate is slidably arranged in the concentrated material cavity and connected to the rotating shaft of the rotation driver; a discharge pipe is arranged on one side of the rotation driver at the bottom of the tank body, and the discharge pipe communicates with the concentrated material cavity.

[0019] In one embodiment, a plurality of jet nozzles are arranged on the outer side of the tank body; the plurality of jet nozzles are arranged at intervals along the circumferential direction of the tank body and respectively communicate with the inner cavity of the tank body; the jet direction of the jet nozzles is tangent to the inner cavity wall of the tank body.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] 1) Since the telescopic rod of the lifting driver is connected to the spraying and sweeping assembly, the spraying and sweeping assembly can rise or fall in the perfusion material cavity with the push and pull of the telescopic rod. And because each nozzle of the spraying and sweeping assembly is arranged opposite to the feeding port of a heating tube, when the spraying and sweeping assembly rises, the nozzle can be far away from the feeding port of the heating tube, so that the slurry in the perfusion material cavity can smoothly pass through the heating tube to be heated and evaporated and flow into the concentrated material cavity. When descaling operation is carried out, the spraying and sweeping assembly can stably descend with the push of the telescopic rod, so that each nozzle can be inserted into a heating tube, and each nozzle can spray gas or liquid to blow and sweep the corresponding heating tube, thereby realizing rapid cleaning of the heating tube.

[0022] 2) Compared with the automatic cleaning vertical tube falling film evaporator of the prior art, the spraying and sweeping assembly of the automatic descaling evaporator of the present disclosure can be lifted by the telescopic rod away from the feed port of the heating tube, so that the slurry can flow smoothly into the heating tube for evaporation during the evaporation operation. When the spray head descends with the telescopic rod and inserts into the corresponding heating tube, gas or liquid can be sprayed into the heating tube through the spray head, and the gas or liquid can touch the entire area of the inner wall of the heating tube, with fewer cleaning dead corners on the inner wall of the heating tube, so that the heating tube can be cleaned more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0024] Figure 1 is a longitudinal sectional view of the automatic descaling evaporator according to an embodiment of the present disclosure;

[0025] Figure 2 is Figure 1 a partial structural schematic diagram of the automatic descaling evaporator shown;

[0026] Figure 3 is Figure 1 a structural schematic diagram of the spraying and sweeping assembly of the automatic descaling evaporator shown;

[0027] Figure 4 is Figure 1 a transverse sectional view of the automatic descaling evaporator shown;

[0028] Figure 5 is Figure 1 a structural schematic diagram of the scraping and feeding assembly of the automatic descaling evaporator shown;

[0029] Figure 6 is Figure 1 a top view of the automatic descaling evaporator shown.

[0030] Reference numerals: 10, automatic descaling evaporator; 100, tank body; 110, pouring material cavity; 1110, wall hanging plate; 1120, spray agent inlet; 120, concentrated material cavity; 1210, discharge pipe; 130, steam heat exchange cavity; 1310, steam inlet; 1320, cold spray water outlet; 200, evaporation assembly; 210, heating pipe; 2110, feed inlet; 2120, discharge outlet; 220, upper partition plate; 230, lower partition plate; 300, descaling mechanism; 310, spraying and sweeping assembly; 3110, mounting rack; 3111, supporting disc; 311a, abutting convex part; 3112, push-pull rod; 3120, telescopic hose; 3130, annular conduit; 320, spray head; 330, lifting drive; 3310, telescopic rod; 400, scraping and feeding assembly; 410, rotating drive; 4110, rotating shaft; 420, descaling plate; 500, jet nozzle. Detailed implementation manners

[0031] For the convenience of understanding the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure content of the present disclosure is more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] To better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below with specific embodiments:

[0035] Such as Figure 1 And Figure 2As shown, an automatic descaling evaporator 10 of an embodiment includes a tank body 100, an evaporation assembly 200 and a descaling mechanism 300; the evaporation assembly 200 is disposed inside the inner cavity of the tank body 100; a perfusion material cavity 110 is formed between the evaporation assembly 200 and the top of the inner cavity of the tank body 100, and a concentrated material cavity 120 is formed between the evaporation assembly 200 and the bottom of the inner cavity of the tank body 100; the perfusion material cavity 110 is respectively communicated with the concentrated material cavity 120 through a plurality of heating tubes 210 of the evaporation assembly 200; the descaling mechanism 300 includes a spraying and sweeping assembly 310 and a lifting driver 330; the spraying and sweeping assembly 310 is disposed inside the perfusion material cavity 110, and a plurality of nozzles 320 protrude towards the evaporation assembly 200; each nozzle 320 is disposed opposite to the feed port 2110 of a heating tube 210; the lifting driver 330 is installed on the top of the tank body 100, and the telescopic rod 3310 of the lifting driver 330 is connected to the spraying and sweeping assembly 310, so that each nozzle 320 approaches and inserts into or pulls out and away from the feed port 2110 of the corresponding heating tube 210.

[0036] It can be understood that since the telescopic rod 3310 of the lifting driver 330 is connected to the spraying and sweeping assembly 310, the spraying and sweeping assembly 310 can rise or fall inside the perfusion material cavity 110 with the push and pull of the telescopic rod 3310. And because each nozzle 320 of the spraying and sweeping assembly 310 is disposed opposite to the feed port 2110 of a heating tube 210, after the spraying and sweeping assembly 310 rises, the nozzle 320 can be away from the feed port 2110 of the heating tube 210, so that the slurry inside the perfusion material cavity 110 can smoothly pass through the heating tube 210 to be heated and evaporated and flow into the concentrated material cavity 120. When performing descaling operations, the spraying and sweeping assembly 310 can smoothly descend with the push of the telescopic rod 3310, so that each nozzle 320 can be inserted into a heating tube 210, and each nozzle 320 can spray gas or liquid to purge the corresponding heating tube 210, thereby realizing rapid cleaning of the heating tube 210.

[0037] It can be understood that compared with the wave-flow valve automatic cleaning vertical tube falling film evaporator of the prior art, the spraying and sweeping assembly 310 of the automatic descaling evaporator 10 of the present disclosure can be lifted by the telescopic rod 3310 and away from the feed port 2110 of the heating tube 210, so that the slurry can smoothly enter the heating tube 210 for evaporation during evaporation operations. When the nozzle 320 descends and inserts into the corresponding heating tube 210 with the telescopic rod 3310, gas or liquid can be sprayed into the heating tube 210 through the nozzle 320, and the gas or liquid can touch the entire area of the inner wall of the heating tube 210, and there are fewer cleaning dead corners on the inner wall of the heating tube 210, so that the heating tube 210 can be cleaned more thoroughly.

[0038] Combined with Figure 1 and Figure 3As shown, in one of the embodiments, the spraying and sweeping assembly 310 includes a mounting frame 3110, a telescopic hose 3120, and an annular conduit 3130; the annular conduit 3130 is disposed on the mounting frame 3110, and the mounting frame 3110 is connected to the telescopic rod 3310 of the lifting driver 330; a plurality of nozzles 320 are spaced apart on the annular conduit 3130 and communicate with the inside of the annular conduit 3130; the telescopic hose 3120 is disposed on the annular conduit 3130, and both ends of the telescopic hose 3120 communicate with the spray inlet 1120 of the tank body 100 and the annular conduit 3130 respectively. It can be understood that since a plurality of nozzles 320 communicate with the annular conduit 3130, and the annular conduit 3130 communicates with the spray inlet 1120 of the tank body 100 through the telescopic hose 3120, liquid or gas can be introduced from the spray inlet 1120 into the annular conduit 3130 and finally ejected from the nozzles 320. Also, by disposing the annular conduit 3130 on the mounting frame 3110, and since the telescopic rod 3310 of the lifting driver 330 is connected to the mounting frame 3110, the annular conduit 3130 can smoothly move up and down with the mounting frame 3110, and the annular conduit 3130 can be stably communicated with the spray inlet 1120 through the telescopic movement of the telescopic hose 3120.

[0039] Combined with Figure 2 and Figure 3 As shown, in this embodiment, the mounting frame 3110 includes a support disk 3111 and a push-pull rod 3112; the push-pull rod 3112 is disposed at the center of the support disk 3111 and is connected to the telescopic rod 3310 of the lifting driver 330; the annular conduit 3130 is disposed around the push-pull rod 3112, and a plurality of nozzles 320 respectively penetrate and are fixedly connected to the support disk 3111. It can be understood that by enabling each nozzle 320 to respectively penetrate and be fixedly connected to the support disk 3111, the support disk 3111 can compactly integrate all the nozzles 320 together. Since the telescopic rod 3310 of the lifting driver 330 is connected to the support disk 3111 through the push-pull rod 3112, the support disk 3111 can drive each nozzle 320 to move up and down synchronously and insert into the feed port 2110 of the corresponding heating tube 210.

[0040] Combined with Figure 1 and Figure 3As shown, further, a peripheral edge of the support disc 3111 is provided with an abutting convex portion 311a, and a wall surface hanging plate 1110 is provided on a cavity wall of the perfusion material cavity 110; the wall surface hanging plate 1110 is close to the evaporation assembly 200 and is disposed opposite to the abutting convex portion 311a. It can be understood that since the wall surface hanging plate 1110 on the cavity wall of the perfusion material cavity 110 is disposed close to the evaporation assembly 200 and is opposite to the abutting convex portion 311a of the support disc 3111, when the support disc 3111 drives each nozzle 320 to approach and insert into a feed port 2110 of the heating tube 210 of the evaporation assembly 200, the abutting convex portion 311a can be firmly hung on the wall surface hanging plate 1110, avoiding the shaking of the spraying and sweeping assembly 310 caused by the reaction force when the nozzle 320 blows the heating tube 210.

[0041] Combined with Figure 1 and Figure 3 As shown, in this embodiment, the number of the annular conduits 3130 and the telescopic hoses 3120 is multiple. The multiple annular conduits 3130 are concentrically arranged from inside to outside, and each annular conduit 3130 is communicated with a spraying agent access port 1120 of the corresponding tank body 100 through a telescopic hose 3120. It can be understood that by providing the multiple annular conduits 3130, since each annular conduit 3130 is communicated with the spraying agent access port 1120 of the corresponding tank body 100 through a telescopic hose 3120, liquid or gas can enter into the corresponding annular conduit 3130 through each spraying agent access port 1120 and blow the corresponding heating tube 210 through each nozzle 320, that is, more heating tubes 210 can be blown at one time, improving the cleaning efficiency.

[0042] Combined with Figure 2 and Figure 4As shown, in one embodiment, the evaporation assembly 200 includes an upper partition plate 220, a plurality of heating tubes 210, and a lower partition plate 230 that are connected in sequence from top to bottom; the upper partition plate 220 and the lower partition plate 230 are respectively connected to the inner cavity wall of the tank body 100. A perfusion material cavity 110 is formed between the upper partition plate 220 and the top of the inner cavity of the tank body 100, and a concentrated material cavity 120 is formed between the lower partition plate 230 and the bottom of the inner cavity of the tank body 100; the feed ports 2110 of the heating tubes 210 are spaced apart and distributed on the upper partition plate 220 and communicate with the perfusion material cavity 110; the discharge ports 2120 of the heating tubes 210 are spaced apart and distributed on the lower partition plate 230 and communicate with the concentrated material cavity 120. It can be understood that since the feed ports 2110 of the heating tubes 210 are spaced apart and distributed on the upper partition plate 220, the feed ports 2110 of the heating tubes 210 can be compactly integrated together through the upper partition plate 220, which can not only withstand more slurry pressure in the perfusion material cavity 110 to facilitate the entry of the slurry, but also facilitate the stable insertion and extraction of the nozzles 320 of the spraying and sweeping assembly 310 into the corresponding feed ports 2110. Also, by making the discharge ports 2120 of the heating tubes 210 be spaced apart and distributed on the lower partition plate 230, the discharge ports 2120 of the heating tubes 210 can be compactly integrated together through the lower partition plate 230 to facilitate the stable discharge of the concentrated slurry.

[0043] Combined with Figure 4 As shown, in this embodiment, the upper partition plate 220 and the lower partition plate 230 are respectively hermetically embedded in the inner cavity wall of the tank body 100. A vapor heat exchange cavity 130 is formed between the upper partition plate 220 and the lower partition plate 230; a plurality of heating tubes 210 are arranged at intervals in the vapor heat exchange cavity 130; the feed end of each heating tube 210 is connected to the upper partition plate 220 and forms a feed port 2110; the discharge end of each heating tube 210 is connected to the lower partition plate 230 and forms a discharge port 2120. It can be understood that by hermetically embedding the upper partition plate 220 and the lower partition plate 230 in the inner cavity wall of the tank body 100 respectively, a sealed vapor heat exchange cavity 130 can be formed between the upper partition plate 220 and the lower partition plate 230. By introducing hot vapor into the vapor heat exchange cavity 130, the hot vapor contacts and exchanges heat with the heating tubes 210, and the heating tubes 210 conduct the heat to the slurry in the heating tubes 210, thereby heating and evaporating the slurry.

[0044] Combined with Figure 4As shown, further, a steam inlet 1310 and a cold spray water outlet 1320 are respectively formed on the cavity wall of the steam heat exchange cavity 130. The steam inlet 1310 is arranged close to the feeding end of the heating pipe 210, and the cold spray water outlet 1320 is arranged close to the discharging end of the heating pipe 210. It can be understood that by arranging the steam inlet 1310 close to the feeding end of the heating pipe 210, when the hot steam enters the steam heat exchange cavity 130 through the steam inlet 1310, the hot steam will first exchange heat with the feeding end of the heating pipe 210, that is, the slurry entering from the feeding port 2110 of the heating pipe 210 can absorb more heat, so that it can evaporate more quickly during the flow along the heating pipe 210. By arranging the cold spray water outlet 1320 close to the discharging end of the heating pipe 210, the cold spray water formed by the condensation of the hot steam can be quickly discharged outside along the heating pipe 210 from the cold spray water outlet 1320.

[0045] Combined with Figure 4 and Figure 5 As shown, in one embodiment, the automatic descaling evaporator 10 further includes a scraping and conveying assembly 400; the scraping and conveying assembly 400 includes a rotation driver 410 and a scale scraping plate 420. The rotation driver 410 is installed at the bottom of the tank body 100; the scale scraping plate 420 is slidably arranged in the concentrated material cavity 120 and is connected to the rotating shaft 4110 of the rotation driver 410; a discharge pipe 1210 is arranged on one side of the rotation driver 410 at the bottom of the tank body 100, and the discharge pipe 1210 communicates with the concentrated material cavity 120. It can be understood that since the scale scraping plate 420 is slidably arranged in the concentrated material cavity 120 and the rotating shaft 4110 of the rotation driver 410 is connected to the scale scraping plate 420, the scale scraping plate 420 can be driven by the rotation driver 410 to rotate in the concentrated material cavity 120, so as to break up the scale slag washed out from the discharging port 2120 of the heating pipe 210. Also, because the discharge pipe 1210 communicates with the concentrated material cavity 120, the scale slag can be smoothly discharged from the discharge pipe 1210.

[0046] Combined with Figure 1 and Figure 6 As shown, in one embodiment, a plurality of jet nozzles 500 are arranged on the outer side of the tank body 100; the plurality of jet nozzles 500 are arranged at intervals along the circumferential direction of the tank body 100 and are respectively communicated with the inner cavity of the tank body 100; the jetting direction of the jet nozzles 500 is tangent to the inner cavity wall of the tank body 100. It can be understood that since the plurality of jet nozzles 500 are arranged at intervals along the circumferential direction of the tank body 100 and the jetting direction of the jet nozzles 500 is tangent to the inner cavity wall of the tank body 100, the liquid or gas injected into the inner cavity of the tank body 100 from the jet nozzles 500 can directly wash the inner cavity wall of the tank body 100 and form a vortex-shaped water flow in the inner cavity of the tank body 100, and the vortex-shaped water flow accelerates the winding and settling of the scale slag.

[0047] In one of the embodiments, for the sake of easy understanding, the usage process of the automatic descaling evaporator 10 in the above embodiment is described as follows:

[0048] When performing evaporation operations, the lifting drive 330 hoists the spraying and sweeping assembly 310 through the telescopic rod 3310. The nozzles of the spraying and sweeping assembly 310 are far from the feed port 2110 of the heating tube 210 of the evaporation assembly 200. The slurry enters the heating tube 210 from the feed port 2110. The heating tube 210 heats up and evaporates the slurry. The slurry evaporates and concentrates and enters the concentrated material chamber 120 from the discharge port 2120 of the heating tube 210. When performing descaling operations, the lifting drive 330 pushes the spraying and sweeping assembly 310 to descend through the telescopic rod 3310. Each nozzle is inserted into the feed port 2110 of the corresponding heating tube 210. Gas or liquid is sprayed into the heating tube 210 through the nozzles. The scale residues in the heating tube 210 are washed away. The scale residues fall along the heating tube 210 into the concentrated material chamber 120. The rotation drive 410 drives the scale scraping plate 420 to break up the scale residues and scrape and convey the scale residues out through the discharge pipe 1210.

[0049] Compared with the prior art, the present disclosure has at least the following advantages:

[0050] 1) Since the telescopic rod 3310 of the lifting drive 330 is connected to the spraying and sweeping assembly 310, the spraying and sweeping assembly 310 can rise or fall in the perfusion material chamber 110 with the push and pull of the telescopic rod 3310. And because each nozzle 320 of the spraying and sweeping assembly 310 is oppositely arranged with the feed port 2110 of a heating tube 210, when the spraying and sweeping assembly 310 rises, the nozzle 320 can be far from the feed port 2110 of the heating tube 210. Thus, the slurry in the perfusion material chamber 110 can smoothly pass through the heating tube 210 to heat up and evaporate and flow into the concentrated material chamber 120. When performing descaling operations, the spraying and sweeping assembly 310 can smoothly descend with the push of the telescopic rod 3310, so that each nozzle 320 can be inserted into a heating tube 210, and each nozzle 320 can spray gas or liquid to purge the corresponding heating tube 210, thereby realizing the rapid cleaning of the heating tube 210.

[0051] 2) Compared with the wave-flow valve automatic cleaning vertical tube falling film evaporator of the prior art, the spraying and sweeping assembly 310 of the automatic descaling evaporator 10 of the present disclosure can be lifted by the telescopic rod 3310 and be far from the feed port 2110 of the heating tube 210. Thus, the slurry can smoothly enter the heating tube 210 for evaporation during evaporation operations. When the nozzle 320 descends with the telescopic rod 3310 and is inserted into the corresponding heating tube 210, gas or liquid can be sprayed into the heating tube 210 through the nozzle 320. The gas or liquid can touch the entire area of the inner wall of the heating tube 210, and there are fewer cleaning dead corners on the inner wall of the heating tube 210. Thus, the heating tube 210 can be cleaned more thoroughly.

[0052] The above-described embodiments merely represent several implementation manners of the present disclosure. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can still be made, and these all fall within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. An automatic descaling evaporator (10), comprising a tank body (100) and an evaporation component (200); the evaporation component (200) is arranged in the inner cavity of the tank body (100); a filling material cavity (110) is formed between the evaporation component (200) and the top of the inner cavity of the tank body (100), and a concentrated material cavity (120) is formed between the evaporation component (200) and the bottom of the inner cavity of the tank body (100); the filling material cavity (110) is respectively connected to the concentrated material cavity (120) through a plurality of heating pipes (210) of the evaporation component (200); It is characterized in that The automatic descaling evaporator (10) further comprises a descaling mechanism (300); The descaling mechanism (300) comprises a spray-sweeping assembly (310) and a lifting drive (330); the spray-sweeping assembly (310) is arranged in the filling material chamber (110), and is provided with a plurality of spray heads (320) protruding toward the evaporation assembly (200); each of the spray heads (320) is arranged opposite to a feed port (2110) of the heating tube (210); the lifting drive (330) is installed on the top of the tank body (100), and the telescopic rod (3310) of the lifting drive (330) is connected to the spray-sweeping assembly (310), so that each of the spray heads (320) can be inserted close to or pulled out from the feed port (2110) of the corresponding heating tube (210).

2. The automatic descaling evaporator (10) according to claim 1, characterized in that: The spray sweeping assembly (310) comprises a mounting frame (3110), a telescopic hose (3120) and an annular duct (3130); the annular duct (3130) is arranged on the mounting frame (3110), and the mounting frame (3110) is connected to the telescopic rod (3310) of the lifting drive (330); a plurality of the spray heads (320) are distributed on the annular duct (3130) at intervals and are connected to the annular duct (3130); the telescopic hose (3120) is arranged on the annular duct (3130), and the two ends of the telescopic hose (3120) are respectively connected to the spray inlet (1120) of the tank body (100) and the annular duct (3130).

3. The automatic descaling evaporator (10) according to claim 2, characterized in that: The mounting frame (3110) includes a supporting plate (3111) and a push-pull rod (3112); the push-pull rod (3112) is arranged at the center position of the supporting plate (3111) and is connected to the telescopic rod (3310) of the lifting drive (330); the annular conduit (3130) is arranged around the push-pull rod (3112), and a plurality of the nozzles (320) respectively penetrate through and are fixedly connected to the supporting plate (3111).

4. The automatic descaling evaporator (10) according to claim 3, characterized in that: The peripheral edge of the support plate (3111) is provided with abutting protrusions (311a), and the cavity wall of the injection cavity (110) is provided with wall hanging plates (1110); the wall hanging plates (1110) are close to the evaporation component (200) and are arranged opposite to the abutting protrusions (311a).

5. The automatic descaling evaporator (10) according to claim 2, characterized in that: The number of the annular conduits (3130) and the telescopic hoses (3120) are both multiple, and the multiple annular conduits (3130) are concentrically arranged from the inside to the outside, and each of the annular conduits (3130) is connected to the spray inlet (1120) of the corresponding tank body (100) through a telescopic hose (3120).

6. The automatic descaling evaporator (10) according to claim 1, characterized in that: The evaporation component (200) comprises an upper baffle (220), a plurality of heating tubes (210) and a lower baffle (230) which are sequentially connected from top to bottom; the upper baffle (220) and the lower baffle (230) are respectively connected to the inner cavity wall of the tank body (100); the infusion cavity (110) is formed between the upper baffle (220) and the top of the inner cavity of the tank body (100); the concentrated cavity (120) is formed between the lower baffle (230) and the bottom of the inner cavity of the tank body (100); the feed ports (2110) of the heating tubes (210) are spaced apart on the upper baffle (220) and are connected to the infusion cavity (110); the discharge ports (2120) of the heating tubes (210) are spaced apart on the lower baffle (230) and are connected to the concentrated cavity (120).

7. The automatic descaling evaporator (10) according to claim 6, characterized in that: The upper partition (220) and the lower partition (230) are respectively sealed and embedded in the inner cavity wall of the tank body (100), and a steam heat exchange cavity (130) is formed between the upper partition (220) and the lower partition (230), and a plurality of heating tubes (210) are arranged in the steam heat exchange cavity (130) at intervals; the feed end of each heating tube (210) is connected to the upper partition (220) to form a feed port (2110); the discharge end of each heating tube (210) is connected to the lower partition (230) to form a discharge port (2120).

8. The automatic descaling evaporator (10) according to claim 7, characterized in that: A steam inlet (1310) and a cold water outlet (1320) are respectively provided on the cavity wall of the steam heat exchange cavity (130); the steam inlet (1310) is arranged close to the feed end of the heating tube (210), and the cold water outlet (1320) is arranged close to the discharge end of the heating tube (210).

9. The automatic descaling evaporator (10) according to claim 1, characterized in that: The automatic descaling evaporator (10) further comprises a scraping assembly (400); the scraping assembly (400) comprises a rotary driver (410) and a scraping plate (420), the rotary driver (410) being mounted at the bottom of the tank body (100); the scraping plate (420) being slidably disposed in the concentrated material chamber (120) and connected to a rotating shaft (4110) of the rotary driver (410); a discharge pipe (1210) is provided at the bottom of the tank body (100) on one side of the rotary driver (410), and the discharge pipe (1210) is connected to the concentrated material chamber (120).

10. The automatic descaling evaporator (10) according to claim 1, characterized in that: A plurality of jet nozzles (500) are arranged on the outer side of the tank body (100); the plurality of jet nozzles (500) are arranged at intervals along the circumference of the tank body (100) and are respectively connected to the inner cavity of the tank body (100); and the spraying direction of the jet nozzles (500) is tangent to the inner cavity wall of the tank body (100).

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