High-temperature wastewater comprehensive utilization energy-saving system based on phase change compensation principle

Abstract

The invention discloses a phase change compensation principle-based high-temperature waste water comprehensive utilization energy-saving system, which comprises an evaporation reheater and a steam purifier which are connected in sequence, the evaporation reheater comprises a reheating box body, the middle part of the reheating box body is provided with a gas passing box, a water falling opening for sewage to flow down is formed between the gas passing box and the reheating box body, and the water falling opening is communicated with the steam purifier. A smoke inlet pipe and a smoke outlet pipe are connected to the exterior of the gas passing box, a lower heat exchange pipe and an upper heat exchange pipe are connected to the two sides of the gas passing box through inserting assemblies respectively, a sewage cavity is formed outside the lower heat exchange pipe, a sewage inlet pipe and a sewage outlet pipe are connected to the outer side of the sewage cavity, and a steam cavity is formed outside the upper heat exchange pipe. A steam outlet pipe is arranged at the top of the steam cavity, a spraying pipe located above the upper heat exchange pipe is arranged in the steam cavity, and the exterior of the spraying pipe is connected with a sewage outlet pipe. The device can take high-temperature flue gas as a heating medium to perform reheating evaporation on sewage, and has the characteristics of good filtering effect and low use cost.

Description

Technical Field

[0001] The invention relates to a high-temperature wastewater comprehensive utilization system, in particular to a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle. Background Art

[0002] In order to ensure the safety and quality of gas production, existing equipment such as thermal power production boilers and industrial waste heat boilers need to produce a large amount of sewage during the production process. In order to recycle this part of sewage, manufacturers generally use phase change compensation systems to vaporize and remove impurities from sewage to form high-quality steam with high utilization value. The phase change compensation system is mainly composed of an evaporator reheater and a steam purifier. The evaporator reheater uses the high-temperature heat source produced by the existing equipment as a heat medium to reheat and evaporate the sewage, so that the sewage is converted into high-temperature steam with pollutants and impurity particles after treatment; then the steam purifier filters the high-temperature steam and adsorbs pollutants to obtain clean commercial steam.

[0003] However, the existing phase change compensation system has the following defects in actual use: on the one hand, in order to improve the utilization rate of waste gas, some manufacturers currently plan to use the high-temperature flue gas generated by boiler incineration as a heat medium to reheat and evaporate the sewage. However, since the high-temperature flue gas contains a large amount of oil droplets, acidic substances and impurity particles, it is not only necessary to reheat and evaporate the sewage through a non-contact heat exchange mechanism, but the flue gas will also adhere oil and impurities to the heat exchange mechanism during the heat exchange process, thereby affecting the heat exchange effect of the evaporator reheater. The existing non-contact evaporator reheater is generally a fixed structure, which not only forms a long air passage, but also the manufacturer cannot disassemble and clean each part separately, making it difficult to use high-temperature flue gas as a heat medium to achieve the heat exchange function, reducing the applicability of the system.

[0004] On the other hand, existing steam purifiers generally purify high-temperature steam through a filter element, which is mainly composed of a metal sintered filter, a sealing cover and a fixed cover, wherein the metal sintered filter is a hollow tube structure, and the sealing cover and the fixed cover are respectively welded or glued to the two ends of the metal sintered filter. The sealing cover seals one end of the metal sintered filter, and the fixed cover is fixed to the other end of the metal sintered filter to form a threaded pipe for gas discharge, so that it can be connected to an external pipeline bracket through the threaded pipe during installation, and the high-temperature steam can be discharged from the threaded pipe after passing through the metal sintered filter, thereby achieving a filtering effect. However, the defect of the filter element structure is that, on the one hand, it can only achieve single filtration of high-temperature steam, that is, the high-temperature steam will be directly discharged to the outside after passing through the metal sintered filter, thereby reducing the adsorption effect of the metal sintered filter on impurities in the high-temperature steam; on the other hand, since the filter element is an integrated structure, that is, the metal sintered filter cannot be removed and replaced separately, once the manufacturer needs to adjust the specifications and coating materials of the metal sintered filter, the entire filter element needs to be replaced, thereby increasing the manufacturer's use cost.

[0005] Therefore, the existing sewage phase change compensation system cannot use high-temperature flue gas as a heat medium to reheat and evaporate the sewage, and has problems such as poor filtering effect and high cost of use. Summary of the invention

[0006] The purpose of the present invention is to provide a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle. It can use high-temperature flue gas as a heat medium to reheat and evaporate sewage, and has the characteristics of good filtering effect and low use cost.

[0007] The technical solution of the present invention is: a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle, comprising an evaporator reheater and a steam purifier connected in sequence, the evaporator reheater comprises a reheat box, an air box is provided in the middle of the reheat box, a water outlet for sewage to flow down is formed between the air box and the reheat box, the outside of the air box is respectively connected with a flue gas inlet pipe and a flue gas outlet pipe, the two sides of the air box are respectively connected with a lower heat exchange tube and an upper heat exchange tube through a plug-in assembly, the outside of the lower heat exchange tube forms a sewage cavity, the outside of the sewage cavity is respectively connected with a sewage inlet pipe and a sewage outlet pipe, the outside of the upper heat exchange tube forms a steam cavity, the top of the steam cavity is provided with a steam outlet pipe, a spray pipe located above the upper heat exchange tube is provided in the steam cavity, and the outside of the spray pipe is connected with the sewage outlet pipe;

[0008] The air outlet box is used to allow the high-temperature flue gas to pass through the upper heat exchange tube and the lower heat exchange tube in sequence after entering;

[0009] The lower heat exchange tube is used to heat the sewage in the sewage chamber to raise its temperature to a saturated state;

[0010] The upper heat exchange tube is used to perform secondary heating on the saturated water sprayed from the spray pipe, so as to convert the saturated water into high-temperature steam.

[0011] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the plug-in assembly includes a core tube and a sleeve that are nested inside and outside and interlocked with each other, the outside of the core tube is connected to the end of the lower heat exchange tube or the upper heat exchange tube, and the outside of the sleeve is connected to the air box. One side of the core tube and the sleeve is slidably connected to the limit rod through a limit hole, the middle part of the limit rod extends to the outside of the sleeve and is slidably connected to the mounting plate, the mounting plate and the limit rod are interconnected via a first compression spring, the end of the limit rod passes through the mounting plate and is connected to a drive assembly, and the drive assembly is used to control the lateral movement of the limit rod, thereby realizing the locking and unlocking of the lower heat exchange tube or the upper heat exchange tube.

[0012] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the number of the plug-in components is four and they are respectively arranged on both sides of the top and bottom of the air box, and each plug-in component is connected to multiple lower heat exchange tubes or upper heat exchange tubes; the limit rod forms a slide groove at the end away from the core tube, and the adjacent limit rods are connected to each other via a transmission plate located in the slide groove, and the upper and lower limit rods located on the same side of the air box are connected to each other via a push plate located in the slide groove. The outside of the push plate is connected to an operating mechanism, and the operating mechanism is used to apply a lateral extrusion force to the push plate, so that the limit rod is in a locked state or an unlocked state under the extrusion action.

[0013] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the operating structure includes a swing shaft rotatably connected to the reheat box body, one end of the swing shaft is located outside the reheat box body and is respectively connected to an operating rod and a swing plate, the outside of the swing plate is rotatably connected to a connecting rod, the end of the connecting rod is connected to a slider slidably connected to the reheat box body, and the slider and the reheat box body are connected to each other via a second compression spring; the other end of the swing shaft extends into the reheat box body and is connected to a drive plate, and two pressure blocks are respectively provided on the drive plate on the left and right sides of the push plate, and the two pressure blocks are respectively used to squeeze the push plate so that the push plate drives the limit rod to be in a locked state or an unlocked state after squeezing.

[0014] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the steam purifier includes a purification box, and the two sides of the purification box are respectively connected to a high-temperature steam inlet and a high-temperature steam outlet, and the middle part of the purification box is connected to several filter components side by side through a mounting plate.

[0015] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the filter component includes a first metal sintered filter screen in the shape of a hollow tube, one end of the first metal sintered filter screen is connected to a sealing cover, the other end of the first metal sintered filter screen is connected to a fixing cover, the external thread of the fixing cover is connected to a locking piece, a support tube is provided on the inner side of the first metal sintered filter screen, one end of the support tube is snap-fitted and connected to the sealing cover, the other end of the support tube is snap-fitted and connected to the locking piece, air ducts for high-temperature steam to pass through are provided around the side walls of the support tube, a second metal sintered filter screen in the shape of a hollow tube is provided on the inner side of the support tube, and the second metal sintered filter screen and the support tube are nested inside and outside.

[0016] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the two ends of the support tube are respectively fitted with the sealing cover and the locking piece, the middle part of the locking piece is snap-fitted with a first head, the end of the first head passes through the fixed cover and is threadedly connected to the support tube; the middle part of the sealing cover is snap-fitted with a second head, the end of the second head passes through the sealing cover and is threadedly connected to the support tube, and the locking piece is provided with an air outlet for high-temperature steam to pass through.

[0017] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, a partition plate is provided in the middle of the support tube, and a retaining ring located on the inner side of the first metal sintered filter screen is provided above the partition plate. The air duct is located on the side wall of the support tube below the partition plate, and the second metal sintered filter screen is located at the lower end of the support tube and completely covers the air duct.

[0018] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, a partition plate is provided in the middle of the support tube, and a retaining ring located on the inner side of the first metal sintered filter screen is provided above the partition plate. The air duct is located on the side walls of the support tube on the upper and lower sides of the partition plate, and the second metal sintered filter screen completely covers the air ducts on both sides.

[0019] In the aforementioned high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle, the baffle ring includes a split fixed baffle ring and a movable baffle ring, the fixed baffle ring and the movable baffle ring are staggered inwards and outwards, the upper end of the fixed baffle ring is buckled and connected to the fixed cover, and the inner side of the movable baffle ring is fixedly connected to the partition plate.

[0020] Compared with the prior art, the present invention has the following characteristics:

[0021] (1) The present invention defines the structure of the plug-in assembly so that the lower heat exchange tube and the upper heat exchange tube can be locked and unlocked, thereby ensuring the sealing stability of the lower heat exchange tube and the upper heat exchange tube after locking and preventing the overflow of high-temperature flue gas during the gas flow process. On the other hand, it enables the operator to remove the lower heat exchange tube and the upper heat exchange tube separately, thereby effectively reducing the difficulty of later cleaning of the lower heat exchange tube and the upper heat exchange tube. Based on this structure, the manufacturer can use high-temperature flue gas as a heat medium to heat the sewage, thereby improving the functionality of the present invention.

[0022] (2) By coordinating the plug-in assembly and the operating structure, the limit rod can be fully extended into the limit hole of the core tube in the locked state to realize the limit function, and when the limit rod is in the unlocked state, the push plate can drive the limit rod to move to partially overlap with the limit hole of the core tube, and leave space for the limit rod to continue to rotate outward; in this state, on the one hand, the limit rod can maintain the locking limit function of the lower heat exchange tube and the upper heat exchange tube, preventing the lower heat exchange tube from being directly disengaged and falling after being unlocked; on the other hand, the lower heat exchange tube or the upper heat exchange tube can squeeze the limit rod to realize the disengagement action during the plug-in and pull-out process, so that the operator can directly plug and unplug the lower heat exchange tube or the upper heat exchange tube to install and remove it, which is convenient for the operator to operate;

[0023] (3) Through the structural cooperation of the swing plate, the slider and the second compression spring, a continuous extrusion force can be applied to the limit rod in the buckled state, thereby effectively improving the buckling and sealing effect of the limit rod on the lower heat exchange tube and the upper heat exchange tube;

[0024] (4) By coordinating the first metal sintered filter screen and the second metal sintered filter screen in the filter assembly, a double-layer filter structure can be formed, thereby improving the filtering effect of high-temperature steam; on this basis, by limiting the structure of the filter assembly, on the one hand, the sealing cover and the fixed cover can be supported and limited, thereby improving the overall stress strength of the filter element and reducing the possibility of stress damage to the first metal sintered filter screen and the second metal sintered filter screen; on the other hand, the first metal sintered filter screen and the second metal sintered filter screen can be replaced separately, thereby reducing the manufacturer's later adjustment and replacement costs;

[0025] (5) Through the coordinated arrangement of the partition plate and the retaining ring, the filter assembly can also be structurally adjusted according to the manufacturer's needs, and a filter structure with two filtering effects is formed. The first is that the first metal sintered filter screen and the second metal sintered filter screen are coordinated to filter the high-temperature steam three times, thereby improving the filtering effect of the high-temperature steam; the second is that the first metal sintered filter screen and the second metal sintered filter screen are used to filter the two parts of the high-temperature steam respectively, thereby forming high-temperature steam with different filtering effects and discharging them separately, thereby improving the functionality of the present invention and facilitating the use of the manufacturer;

[0026] (6) By further defining the retaining ring structure, the manufacturer can also switch the function of the filter assembly by rotating the support tube and replacing the first head and the second metal sintered filter screen, that is, there is no need to disassemble and reassemble the filter assembly as a whole, further improving the convenience of operation for operators;

[0027] Therefore, the present invention can use high-temperature flue gas as a heat medium to reheat and evaporate sewage, and has the characteristics of good filtering effect and low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a connection schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the evaporator reheater;

[0030] Figure 3 It is a connection diagram of the plug-in assembly and the air box;

[0031] Figure 4 is a partial enlarged view of the plug assembly in the unlocked state;

[0032] Figure 5 It is a schematic diagram of the connection between the swing shaft and the slider;

[0033] Figure 6 It is a schematic diagram of the structure of a steam purifier;

[0034] Figure 7 is a schematic diagram of the structure of the filter assembly in Example 1;

[0035] Figure 8 is a schematic diagram of the structure of the filter assembly in Example 2;

[0036] Fig. 9 is a schematic diagram of the structure of the filter assembly in Example 3;

[0037] Fig.10 is a cross-sectional view of the retaining ring in the closed state in Example 3;

[0038] Fig.11 It is a cross-sectional view of the retaining ring in Example 3 in an open state.

[0039] The markings in the attached drawings are: 100-evaporator reheater, 200-steam purifier, 1-reheat box, 2-air box, 3-downspout, 4-smoke inlet pipe, 5-smoke outlet pipe, 6-lower heat exchange pipe, 7-upper heat exchange pipe, 8-sewage inlet pipe, 9-sewage outlet pipe, 10-steam outlet pipe, 11-spray pipe, 12-core pipe, 13-sleeve, 14-limit rod, 15-mounting plate, 16-first compression spring, 17-transmission plate, 18-push plate, 19-swing shaft, 20-operating rod, 21 -swing plate, 22-connecting rod, 23-slider, 24-second compression spring, 25-driving plate, 26-pressing block, 31-purification box, 32-high-temperature steam inlet, 33-high-temperature steam outlet, 34-first metal sintered filter, 35-sealing cover, 36-fixed cover, 37-locking piece, 38-support tube, 39-second metal sintered filter, 40-first head, 41-second head, 42-partition plate, 43-retaining ring, 431-fixed retaining ring, 432-movable retaining ring. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0041] Example 1. A high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle, comprising: Figure 1-7 As shown, it includes an evaporator reheater 100 and a steam purifier 200 connected in sequence, the evaporator reheater 100 includes a reheat box 1, an air outlet box 2 is provided in the middle of the reheat box 1, a water outlet 3 for sewage to flow down is formed between the air outlet box 2 and the reheat box 1, the outside of the air outlet box 2 is respectively connected with a flue gas inlet pipe 4 and a flue gas outlet pipe 5, the two sides of the air outlet box 2 are respectively connected with a lower heat exchange tube 6 and an upper heat exchange tube 7 through a plug-in assembly, the lower heat exchange tube 6 and the upper heat exchange tube 7 are both U-shaped tube structures, the outside of the lower heat exchange tube 6 forms a sewage cavity, the outside of the sewage cavity is respectively connected with a sewage inlet pipe 8 and a sewage outlet pipe 9, the outside of the upper heat exchange tube 7 forms a steam cavity, the top of the steam cavity is provided with a steam outlet pipe 10, the steam cavity is provided with a spray pipe 11 located above the upper heat exchange tube 7, and the outside of the spray pipe 11 is connected to the sewage outlet pipe 9;

[0042] The air outlet box 2 is used to allow the high-temperature flue gas to pass through the upper heat exchange tube 7 and the lower heat exchange tube 6 in sequence after entering;

[0043] The lower heat exchange tube 6 is used to heat the sewage in the sewage chamber to raise its temperature to a saturated state;

[0044] The upper heat exchange tube 7 is used to perform secondary heating on the saturated water sprayed from the spray pipe 11, so as to convert the saturated water into high-temperature steam.

[0045] An operating door is connected to one side of the reheat box 1, and an operator can load and unload the upper heat exchange tube 7 and the lower heat exchange tube 6 through the operating door; a secondary heater can be arranged between the evaporator reheater 100 and the steam purifier 200 as needed, so that the high-temperature steam can be further heated by the secondary heater to reach a specified temperature.

[0046] The air outlet box includes a first air duct, a second air duct and a third air duct separated from each other, wherein the smoke inlet pipe 4 and one end of the upper heat exchange pipe 7 are connected to the first air duct, the other end of the upper heat exchange pipe 7 and one end of the lower heat exchange pipe 6 are connected to the second air duct, and the other end of the lower heat exchange pipe 6 and the smoke outlet pipe 5 are connected to the third air duct.

[0047] The plug-in assembly includes a core tube 12 and a sleeve 13 which are nested inside and outside and interlock with each other to form a seal. A conical contact surface is formed between the core tube 12 and the sleeve 13. The outside of the core tube 12 can be covered with a flexible pad as needed. The outside of the core tube 12 is connected to the end of the lower heat exchange tube 6 or the upper heat exchange tube 7. The outside of the sleeve 13 is connected to the air box 2. One side of the core tube 12 and the sleeve 13 is slidably connected to a limiting rod 14 through a limiting hole. The limiting rod 14 forms an arc surface near one end of the core tube 12. The middle part of the limiting rod 14 extends to the outside of the sleeve 13 and is slidably connected to a mounting plate 15. The mounting plate 15 and the limiting rod 14 are mutually connected via a first compression spring 16. The end of the limiting rod 14 passes through the mounting plate 15 and is connected to a driving assembly. The driving assembly is used to control the lateral movement of the limiting rod 14, thereby realizing the locking and unlocking of the lower heat exchange tube 6 or the upper heat exchange tube 7.

[0048] There are four plug-in components and they are respectively arranged on both sides of the top and bottom of the air outlet box 2, each plug-in component is connected to a plurality of lower heat exchange tubes 6 or upper heat exchange tubes 7 arranged side by side on the air outlet box 2; the limit rod 14 forms a slide groove at the end away from the core tube 12, and the adjacent limit rods 14 along the length direction of the air outlet box 2 are connected to each other via a transmission plate 17 located in the slide groove, and the upper and lower limit rods 14 located on the same side of the air outlet box 2 are connected to each other via a push plate 18 located in the slide groove, and the outside of the push plate 18 is connected to an operating mechanism, and the operating mechanism is used to apply a lateral extrusion force to the push plate 18, so that the limit rod 14 is in a locked state or an unlocked state under the extrusion action.

[0049] The operating structure includes a swing shaft 19 rotatably connected to the reheat box body 1, one end of the swing shaft 19 is located outside the reheat box body 1 and is respectively connected to an operating rod 20 and a swing plate 21, and limit strips can be installed on the reheat box body 1 on both sides of the swing plate 21 to limit the rotation angle of the swing plate 21, and the outer rotation of the swing plate 21 is connected to a connecting rod 22, and the end of the connecting rod 22 is connected to a slider 23 slidably connected to the reheat box body 1, and the slider 23 and the reheat box body 1 are connected to each other via a second compression spring 24, and the second compression spring 24 maintains a contracted state and applies a continuous extrusion force to the swing plate 21 through the slider 23; the other end of the swing shaft 19 extends into the reheat box body 1 and is connected to a driving plate 25, and the driving plate 25 is respectively provided with two pressing blocks 26 located on the left and right sides of the push plate 18, and the two pressing blocks 26 are respectively used to squeeze the push plate 18, so that the push plate 18 drives the limit rod 14 to be in a locked state or an unlocked state after squeezing.

[0050] The operating structure can be symmetrically arranged on the left and right sides of the reheat box 1, and each operating structure controls a push plate 18 respectively; it can also be arranged on one side of the reheat box 1, and two push plates 18 are controlled simultaneously through two driving plates 25.

[0051] The steam purifier 200 includes a purification box 31, which is provided with an operating door for operators to load, unload and replace. Both sides of the purification box 31 are respectively connected to a high-temperature steam inlet 32 ​​and a high-temperature steam outlet 33. The bottom of the purification box is provided with a waste outlet. The middle of the purification box 31 is connected to a plurality of filter components in parallel via a mounting plate 15.

[0052] The filter assembly includes a first metal sintered filter screen 34 in the shape of a hollow tube, one end of the first metal sintered filter screen 34 is connected to a sealing cover 35, the other end of the first metal sintered filter screen 34 is connected to a fixing cover 36, the external thread of the fixing cover 36 is connected to a locking piece 37, a support tube 38 is provided on the inner side of the first metal sintered filter screen 34, one end of the support tube 38 is snap-fitted and connected to the sealing cover 35 to form an interference connection, the other end of the support tube 38 is snap-fitted and connected to the locking piece 37, an air passage for high-temperature steam to pass through is provided around the side wall of the support tube 38, a second metal sintered filter screen 39 in the shape of a hollow tube is provided on the inner side of the support tube 38, the second metal sintered filter screen 39 and the support tube 38 are nested inside and outside, the surface of the second metal sintered filter screen 39 is coated with an adsorption layer for adsorbing specific pollutants in the high-temperature steam, and the second metal sintered filter screen 39 and the support tube 38 are nested inside and outside.

[0053] The two ends of the support tube 38 are respectively fitted with the sealing cover 35 and the locking piece 37, and the middle part of the locking piece 37 is buckled and connected with the first head 40, and the end of the first head 40 passes through the fixing cover 36 and is threadedly connected to the support tube 38; the middle part of the sealing cover 35 is buckled and connected with the second head 41, and the end of the second head 41 passes through the sealing cover 35 and is threadedly connected to the support tube 38, and the locking piece 37 is provided with an air outlet for high-temperature steam to pass through.

[0054] A partition plate 42 is provided in the middle of the support tube 38, and the four sides of the partition plate 42 are in contact with the inner wall of the first metal sintered filter screen 34. The air duct is located on the side wall of the support tube 38 below the partition plate 42, and the second metal sintered filter screen 39 is located at the lower end of the support tube 38 and completely covers the air duct.

[0055] A vent hole is formed in the middle of the first sealing head 40 , and the first sealing head 40 is connected to an external air pipe through a connecting portion at one end away from the support pipe 38 .

[0056] When the present embodiment is in use, the high-temperature flue gas enters the air box 2 through the flue gas inlet pipe 4, and is discharged from the flue gas outlet pipe 5 after passing through the upper heat exchange tube 7 and the lower heat exchange tube 6 in sequence. At the same time, the sewage enters the sewage cavity at the bottom of the reheat box 1 through the sewage inlet pipe 8, so that the sewage is heat-exchanged by the lower heat exchange tube 6, and the sewage is heated to a saturated state. After the sewage reaches the specified temperature, the sewage in the sewage cavity is discharged by the water pump through the sewage outlet pipe 9 and pumped into the spray pipe 11, and the sewage is evenly sprayed onto the surface of the upper heat exchange tube 7 by the spray pipe 11, so that the sewage is reheated and evaporated by the upper heat exchange tube 7 to form high-temperature steam. After the high-temperature steam is generated, it is discharged to the outside through the steam outlet pipe 10 and enters the steam purifier 200, while the liquid sewage that has not been completely evaporated flows back to the sewage cavity through the downspout 3, thereby realizing the circulation heating function of the sewage.

[0057] During the use of the evaporator reheater 100, the plug-in assembly is in a locked state and the limit rod 14 is completely engaged with the core tube 12, thereby limiting the lower heat exchange tube 6 and the upper heat exchange tube 7, ensuring the connection stability and sealing of the two. At the same time, through the cooperation of the second compression spring 24, the swing shaft 19, the drive plate 25 and the push plate 18, a continuous inward extrusion force can be applied to the limit rod 14, so that the limit rod 14 cannot be disengaged and ejected in this state. When the operator needs to remove the lower heat exchange tube 6 and the upper heat exchange tube 7, the operator first rotates the swing shaft 19 from the locked state to the unlocked state through the operating rod 20, and makes the pressure block 26 apply an outward extrusion force to the push plate 18 with the rotation, so that the push plate 18 drives each limit rod 14 to be pulled out. When the limit rod 14 moves to the unlocked state, the arc surface at the end of the limit rod 14 overlaps with the core tube 12, thereby realizing temporary limit of the lower heat exchange tube 6 and the upper heat exchange tube 7. The operator can directly pull out the lower heat exchange tube 6 or the upper heat exchange tube 7, and make the limit rod 14 continue to slide outward with the pulling out of the core tube 12, so as to achieve the rapid release of the heat exchange tube. Under the above cooperation, the operator can clean each lower heat exchange tube 6 and upper heat exchange tube 7 separately, effectively preventing impurities in the high-temperature flue gas from adhering to the inner wall of the pipe and causing the heat exchange effect to decrease. After the cleaning of the lower heat exchange tube 6 and the upper heat exchange tube 7 is completed, the operator can first complete the plug-in of the heat exchange tube in the unlocked state, and then rotate the swing shaft 19 plug-in assembly to return to the locked state.

[0058] After being discharged from the evaporator reheater 100, the high-temperature steam enters the purification box 31 through the high-temperature steam inlet 32, and then a part of the high-temperature steam passes through the first metal sintered filter 34 from above the partition plate 42 to enter the inner side of the filter element, and flows upward along the two gaps between the support tube 38 and the first metal sintered filter 34, and then passes through the air outlet and the high-temperature steam outlet 33 to be discharged outward; thus, the first metal sintered filter 34 is used to filter this part of the high-temperature steam. Under the suction effect of the external pipeline, the other part of the high-temperature steam passes through the first metal sintered filter 34 and the second metal sintered filter 39 from below the partition plate 42 in sequence to enter the inner side of the support tube 38, and is discharged outward from the first head 40 after passing through the support tube 38, so that the first metal sintered filter 34 and the second metal sintered filter 39 are used to filter this part of the high-temperature steam for a second time, and the high-temperature steam with a specific filtering effect is collected.

[0059] When the operator needs to replace the second metal sintered filter screen 39 at a later stage, the operator can unscrew the second sealing head 41 and then pull out the second metal sintered filter screen 39 separately, thereby facilitating the separate replacement of the second metal sintered filter screen 39 .

[0060] Example 2. A filter assembly, comprising Figure 8As shown, it includes a first metal sintered filter screen 34 in the shape of a hollow tube, one end of the first metal sintered filter screen 34 is connected to a sealing cover 35, the other end of the first metal sintered filter screen 34 is connected to a fixing cover 36, the external thread of the fixing cover 36 is connected to a locking piece 37, a support tube 38 is provided on the inner side of the first metal sintered filter screen 34, one end of the support tube 38 is snap-fitted and connected to the sealing cover 35 to form an interference connection, the other end of the support tube 38 is snap-fitted and connected to the locking piece 37, an air passage for high-temperature steam to pass through is provided around the side wall of the support tube 38, a second metal sintered filter screen 39 in the shape of a hollow tube is provided on the inner side of the support tube 38, the second metal sintered filter screen 39 and the support tube 38 are nested inside and outside, the surface of the second metal sintered filter screen 39 is coated with an adsorption layer for adsorbing specific pollutants in the high-temperature steam, and the second metal sintered filter screen 39 and the support tube 38 are nested inside and outside.

[0061] The two ends of the support tube 38 are respectively fitted with the sealing cover 35 and the locking piece 37, and the middle part of the locking piece 37 is buckled and connected with the first head 40, and the end of the first head 40 passes through the fixing cover 36 and is threadedly connected to the support tube 38; the middle part of the sealing cover 35 is buckled and connected with the second head 41, and the end of the second head 41 passes through the sealing cover 35 and is threadedly connected to the support tube 38, and the locking piece 37 is provided with an air outlet for high-temperature steam to pass through.

[0062] A partition plate 42 is provided in the middle of the support tube 38, and a retaining ring 43 located on the inner side of the first metal sintered filter screen 34 is provided above the partition plate 42. The retaining ring 43 is used to shield the external first metal sintered filter screen 34 so that the high-temperature steam around cannot enter the inside through the first metal sintered filter screen 34. The surrounding of the partition plate 42 is in contact with the inner wall of the first metal sintered filter screen 34. The surrounding of the partition plate 42 is in contact with the inner wall of the first metal sintered filter screen 34. The air duct is located on the side walls of the support tube 38 on the upper and lower sides of the partition plate 42, and the second metal sintered filter screen 39 completely covers the air duct.

[0063] Compared with the filter assembly of Example 1, this embodiment blocks the upper end of the support tube 38 by a closed first head 40, and uses a retaining ring 43 to seal the first metal sintered filter screen 34 above the partition plate 42, so that high-temperature steam can only enter the filter element from the bottom of the partition plate 42. When flowing, the high-temperature steam passes through the first metal sintered filter screen 34 and the second metal sintered filter screen 39 in turn to enter the inner side of the support tube 38, then flows upward along the support tube 38 to the top of the partition plate 42, and then passes through the second metal sintered filter screen 39 and the support tube 38 to the gap between the support tube 38 and the retaining ring 43, and finally is discharged from the air outlet. Under the above cooperation, this embodiment enables the high-temperature steam to pass through the second metal sintered filter screen 39 twice during the filtering process, thereby improving the filtering effect of the second metal sintered filter screen 39 on the high-temperature steam. Manufacturers can adjust or replace the filter assembly as required to form filter assemblies with different filtering functions.

[0064] Example 3. A filter assembly, comprising Figure 9-11 As shown, it includes a first metal sintered filter screen 34 in the shape of a hollow tube, one end of the first metal sintered filter screen 34 is connected to a sealing cover 35, the other end of the first metal sintered filter screen 34 is connected to a fixing cover 36, the external thread of the fixing cover 36 is connected to a locking piece 37, a support tube 38 is provided on the inner side of the first metal sintered filter screen 34, one end of the support tube 38 is snap-fitted and connected to the sealing cover 35 to form an interference connection, the other end of the support tube 38 is snap-fitted and connected to the locking piece 37, an air passage for high-temperature steam to pass through is provided around the side wall of the support tube 38, a second metal sintered filter screen 39 in the shape of a hollow tube is provided on the inner side of the support tube 38, the second metal sintered filter screen 39 and the support tube 38 are nested inside and outside, the surface of the second metal sintered filter screen 39 is coated with an adsorption layer for adsorbing specific pollutants in the high-temperature steam, and the second metal sintered filter screen 39 and the support tube 38 are nested inside and outside.

[0065] The two ends of the support tube 38 are respectively fitted with the sealing cover 35 and the locking piece 37. The middle part of the locking piece 37 is buckled with a first head 40. The first head 40 can be a plug or a threaded joint with an air hole as required. The end of the first head 40 passes through the fixed cover 36 and is threadedly connected to the support tube 38. The middle part of the sealing cover 35 is buckled with a second head 41. The end of the second head 41 passes through the sealing cover 35 and is threadedly connected to the support tube 38. The locking piece 37 is provided with an air outlet for high-temperature steam to pass through.

[0066] A partition plate 42 is provided in the middle of the support tube 38, and a retaining ring 43 located on the inner side of the first metal sintered filter screen 34 is provided above the partition plate 42. The retaining ring 43 is used to shield the external first metal sintered filter screen 34 so that the high-temperature steam around cannot enter the inside through the first metal sintered filter screen 34. The surrounding of the partition plate 42 is in contact with the inner wall of the first metal sintered filter screen 34. The surrounding of the partition plate 42 is in contact with the inner wall of the first metal sintered filter screen 34. The air duct is located on the side walls of the support tube 38 on the upper and lower sides of the partition plate 42. The second metal sintered filter screen 39 completely covers the air duct below the partition plate 42 or on the upper and lower sides of the partition plate 42.

[0067] The top of the second metal sintered filter screen 39 can be installed with an inner cylinder sleeved on the inner side of the support tube 38 as needed, and the inner cylinder is used to completely close the air passage above the partition plate 42.

[0068] The retaining ring 43 includes a split fixed retaining ring 431 and a movable retaining ring 432, which are staggered inside and outside. The upper end of the fixed retaining ring 431 is buckled and connected to the fixed cover 36, and the inner side of the movable retaining ring 432 is fixedly connected to the partition plate 42. One end of the movable retaining ring 432 is provided with a bend for limiting the rotation of the movable retaining ring 432.

[0069] Compared with the filter components in Examples 1 and 2, this embodiment further adjusts the assembly structure of the filter component so that the operator can switch the use state of the filter component. When it is necessary to form a filtering state similar to that of Example 1, the operator rotates the support tube 38 with a tool after unscrewing the second end cap 41, so that the movable retaining ring 432 rotates accordingly to form a circumferential overlap state with the fixed retaining ring 431, thereby releasing the closure of the first metal sintered filter screen 34 on all sides. Then, the inner cylinder is sleeved in the support tube 38 above the second metal sintered filter screen 39, and the support tube 38 is connected to the external pipeline through a threaded joint, so that the high-temperature steam can be filtered in batches according to the flow direction of Example 1 in this state.

[0070] When a filtering state similar to that of Example 2 is required, the operator rotates the movable baffle ring 432 to be offset from the fixed baffle ring 431, and then places two second metal sintered filter screens 39 side by side in the support tube 38, and fixes the upper end of the support tube 38 with a plug instead of a threaded joint. In this state, the high-temperature steam can be filtered multiple times according to the flow direction of Example 2.

[0071] With the above-mentioned coordination, the operating personnel do not need to dismantle the filter assembly as a whole during operation, thereby improving the operating convenience for the operating personnel.

Claims

1. A high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle, characterized by: The invention comprises an evaporator reheater (100) and a steam purifier (200) connected in sequence, wherein the evaporator reheater (100) comprises a reheat box (1), an air outlet box (2) is provided in the middle of the reheat box (1), a water outlet (3) for sewage to flow down is formed between the air outlet box (2) and the reheat box (1), the outside of the air outlet box (2) is respectively connected to a smoke inlet pipe (4) and a smoke outlet pipe (5), the two sides of the air outlet box (2) are respectively connected to a lower heat exchange tube (6) and an upper heat exchange tube (7) via a plug-in assembly, the outside of the lower heat exchange tube (6) forms a sewage cavity, the outside of the sewage cavity is respectively connected to a sewage inlet pipe (8) and a sewage outlet pipe (9), the outside of the upper heat exchange tube (7) forms a steam cavity, the top of the steam cavity is provided with a steam outlet pipe (10), a spray pipe (11) located above the upper heat exchange tube (7) is provided in the steam cavity, and the outside of the spray pipe (11) is connected to the sewage outlet pipe (9); The air outlet box (2) is used to allow the high-temperature flue gas to pass through the upper heat exchange tube (7) and the lower heat exchange tube (6) in sequence after entering; The lower heat exchange tube (6) is used to heat the sewage in the sewage chamber to raise its temperature to a saturated state; The upper heat exchange tube (7) is used to perform secondary heating on the saturated water sprayed from the spray pipe (11), so as to convert the saturated water into high-temperature steam.

2. According to claim 1, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: The plug-in assembly comprises a core tube (12) and a sleeve (13) which are nested and interlocked with each other, the outside of the core tube (12) is connected to the end of the lower heat exchange tube (6) or the upper heat exchange tube (7), the outside of the sleeve (13) is connected to the air box (2), one side of the core tube (12) and the sleeve (13) is slidably connected to a limiting rod (14) through a limiting hole, the middle part of the limiting rod (14) extends to the outside of the sleeve (13) and is slidably connected to a mounting plate (15), the mounting plate (15) and the limiting rod (14) are connected to each other through a first compression spring (16), the end of the limiting rod (14) passes through the mounting plate (15) and is connected to a driving assembly, the driving assembly is used to control the lateral movement of the limiting rod (14), thereby realizing the locking and unlocking of the lower heat exchange tube (6) or the upper heat exchange tube (7).

3. According to claim 2, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: The number of the plug-in components is four and they are respectively arranged on both sides of the top and bottom of the air outlet box (2), and each plug-in component is connected to a plurality of lower heat exchange tubes (6) or upper heat exchange tubes (7); the limit rod (14) forms a slide groove at the end away from the core tube (12), and adjacent limit rods (14) are connected to each other via a transmission plate (17) located in the slide groove; the upper and lower limit rods (14) located on the same side of the air outlet box (2) are connected to each other via a push plate (18) located in the slide groove, and the outside of the push plate (18) is connected to an operating mechanism, and the operating mechanism is used to apply a lateral extrusion force to the push plate (18), so that the limit rod (14) is in a locked state or an unlocked state under the extrusion action.

4. According to claim 3, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: The operating structure comprises a swing shaft (19) rotatably connected to the reheat box (1), one end of the swing shaft (19) is located outside the reheat box (1) and is respectively connected to an operating rod (20) and a swing plate (21), the outside of the swing plate (21) is rotatably connected to a connecting rod (22), the end of the connecting rod (22) is connected to a slider (23) slidably connected to the reheat box (1), and the slider (23) and the reheat box (1) are connected to each other via a second compression spring (24); the other end of the swing shaft (19) extends into the reheat box (1) and is connected to a driving plate (25), and the driving plate (25) is respectively provided with two pressing blocks (26) located on the left and right sides of the push plate (18), and the two pressing blocks (26) are respectively used to press the push plate (18) so that the push plate (18) drives the limit rod (14) to be in a locked state or an unlocked state after being pressed.

5. According to claim 1, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: The steam purifier (200) comprises a purification box (31), with a high-temperature steam inlet (32) and a high-temperature steam outlet (33) respectively connected to both sides of the purification box (31), and a plurality of filter components connected in parallel in the middle of the purification box (31) via a mounting plate (15).

6. According to claim 5, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: The filter assembly comprises a first metal sintered filter screen (34) in the shape of a hollow tube, one end of the first metal sintered filter screen (34) is connected to a sealing cover (35), the other end of the first metal sintered filter screen (34) is connected to a fixing cover (36), the external thread of the fixing cover (36) is connected to a locking piece (37), a support tube (38) is provided on the inner side of the first metal sintered filter screen (34), one end of the support tube (38) is snap-fitted to the sealing cover (35), the other end of the support tube (38) is snap-fitted to the locking piece (37), air passages for high-temperature steam to pass through are provided around the side wall of the support tube (38), a second metal sintered filter screen (39) in the shape of a hollow tube is provided on the inner side of the support tube (38), and the second metal sintered filter screen (39) and the support tube (38) are nested inside and outside.

7. According to claim 6, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: The two ends of the support tube (38) are respectively fitted with the sealing cover (35) and the locking piece (37); the middle part of the locking piece (37) is buckled and connected with a first end cap (40); the end of the first end cap (40) passes through the fixing cover (36) and is threadedly connected to the support tube (38); the middle part of the sealing cover (35) is buckled and connected with a second end cap (41); the end of the second end cap (41) passes through the sealing cover (35) and is threadedly connected to the support tube (38); and the locking piece (37) is provided with an air outlet for high-temperature steam to pass through.

8. According to claim 7, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: A partition plate (42) is provided in the middle of the support tube (38), and a retaining ring (43) located on the inner side of the first metal sintered filter screen (34) is provided above the partition plate (42). The air passage is located on the side wall of the support tube (38) below the partition plate (42), and the second metal sintered filter screen (39) is located at the lower end of the support tube (38) and completely covers the air passage.

9. According to claim 7, a high-temperature wastewater comprehensive utilization energy-saving system based on the phase change compensation principle is characterized by: A partition plate (42) is provided in the middle of the support tube (38), and a retaining ring (43) located on the inner side of the first metal sintered filter screen (34) is provided above the partition plate (42). The air passage is located on the side walls of the support tube (38) on the upper and lower sides of the partition plate (42), and the second metal sintered filter screen (39) completely covers the air passages on both sides.

10. The high-temperature wastewater comprehensive utilization and energy-saving system based on the phase change compensation principle according to claim 9 is characterized in that: The retaining ring (43) comprises a split fixed retaining ring (431) and a movable retaining ring (432), the fixed retaining ring (431) and the movable retaining ring (432) being arranged in an inner and outer staggered manner, the upper end of the fixed retaining ring (431) being buckled and connected to the fixed cover (36), and the inner side of the movable retaining ring (432) being fixedly connected to the partition plate (42).

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