Boiler make-up water desalting device

Abstract

The utility model relates to the technical field of boiler make-up water desalting, and discloses a boiler make-up water desalting device which comprises a shell, a first filter element, a second filter element and a mounting frame body, mounting covers are arranged at the two ends of the mounting frame body, a partition plate is mounted in the mounting frame body, and the partition plate is divided into a first filtering space and a second filtering space; the first filter element is located in the first filter space, the second filter element is located in the second filter space, a first water through hole is formed in one mounting cover, a second water through hole is formed in the other mounting cover, and a first channel is formed in the partition plate; the first filter element divides the first filter space into a first filter layer and a second filter layer, and the first water through hole is communicated with the first filter layer; the second filter element divides the second filter space into a third filter layer and a fourth filter layer, the second filter layer is communicated with the third filter layer through a first channel, and the fourth filter layer is communicated with the second water through hole. According to the invention, the filter element in the shell can be fully used.

Description

Technical Field

[0001] The present application relates to the technical field of boiler feed water desalination, and in particular to a boiler feed water desalination device. Background Art

[0002] The traditional means of chemical water treatment technology for boiler feed water in thermal power plants is pretreatment based on coagulation, sedimentation and filtration processes, combined with anion and cation exchangers that remove ions in water by ion exchange. If the salt content in the raw water is high, the resin regeneration cycle is shortened, resulting in large fluctuations in the effluent water quality. With the large-scale development of thermal power plants, desalination devices have been added to boiler feed water treatment to achieve the purpose of fine desalination.

[0003] The boiler feed water desalination device uses ultrafiltration + two-stage reverse osmosis + mixed bed treatment mode. Salt will accumulate on the reverse osmosis filter element used. Either the filter element must be replaced or the filter element must be desalted. The salt in the filter element can be dried and scraped off, but the salt will still remain, and the salt content of the filter element close to the water inlet pipe is generally higher. Some parts of the filter element can continue to desalinate, so it is a waste to directly replace the filter element. Summary of the invention

[0004] In order to make better use of the filter element, the present application provides a boiler feed water desalination device.

[0005] The present application provides a boiler feed water desalination device, which adopts the following technical solution:

[0006] A boiler feed water desalination device comprises a housing, a first filter element, a second filter element and a mounting frame for supporting the first filter element and the second filter element, wherein the mounting frame has a cavity, both ends of the mounting frame are provided with mounting covers, a partition is installed in the mounting frame, the partition divides the cavity into a first filter space and a second filter space, the first filter element is located in the first filter space, the second filter element is located in the second filter space, the mounting cover located in the first filter space is provided with a first water hole, the mounting cover located in the second filter space is provided with a second water hole, and the partition is provided with a first channel;

[0007] The first filter element divides the first filter space into a first filter layer and a second filter layer, the first filter layer is located inside the first filter element, the second filter layer is located outside the first filter element, and the first water hole is connected to the first filter layer;

[0008] The second filter element divides the second filter space into a third filter layer and a fourth filter layer. The third filter layer is located inside the second filter element, and the fourth filter layer is located outside the second filter element. The second filter layer is connected to the third filter layer through the first channel, and the fourth filter layer is connected to the second water hole.

[0009] By adopting the above technical scheme, the feed water first passes through the first filter element, is filtered by the first filter, and then enters the second filter element for filtration. The salt content of the feed water is removed the most when it passes through the first filter element, and then enters the second filter element to continue to be removed. The salt content on the first filter element will be relatively high, and the salt content on the second filter element will be relatively low. When the first filter element is replaced twice, the second filter element only needs to be replaced once. Overall, the service life of the filter element in the housing can be extended, and the feed water does not have to pass through one filter element, so that the second filter element can continue to be used, and all the filter elements in the housing can be used more fully.

[0010] Optionally, the installation cover located in the first filter space is provided with the third water hole, the installation cover located in the second filter space is provided with the fourth water hole, the partition is provided with a second channel, the installation cover is provided with a first opening and closing component for opening and closing the first water hole, the second water hole, the third water hole, and the fourth water hole, the partition is provided with a second opening and closing component for opening and closing the first channel and the second channel, the fourth water hole is connected to the third filter layer, the third water hole is connected to the second filter layer, and the fourth filter layer is connected to the first filter layer through the second channel.

[0011] By adopting the above technical solution, after replacing the first filter element, the original second filter element has more salt. The original second filter element can be placed close to the water inlet pipe of the shell, so that the feed water passes through the second filter element first and then enters the new first filter element, so that the salt content of the original second filter element continues to increase, and the newly added first filter element has less salt. After the second filter element is replaced, the feed water can enter the second filter element from the first filter element again, so the filter element in the shell can be more fully utilized.

[0012] Optionally, the mounting frame includes a mounting tube with openings at both ends, the outer wall of the mounting tube is attached to the inner wall of the shell, and the mounting cover blocks the two openings respectively.

[0013] By adopting the above technical solution, the supply water is all quietly in the mounting frame, and there will be no salt on the inner wall of the shell, and then you only need to clean the mounting frame.

[0014] Optionally, the outer peripheral side of the partition is attached to the inner wall of the mounting tube.

[0015] By adopting the above technical solution, the partition is only attached to the inner wall of the installation tube, and the salt on the inner wall of the installation tube can be scraped off when the partition slides out.

[0016] Optionally, a scraper rod is installed on the mounting cover.

[0017] By adopting the above technical solution, the scraper rod can scrape the salt from the first filter element and the second filter element.

[0018] Optionally, the scraper rod is detachably mounted on the mounting cover.

[0019] By adopting the above technical solution, the first filter element and the second filter element filter normally, and the scraping rod is installed when scraping is needed.

[0020] Optionally, a connecting rod is installed on the partition, and the mounting cover is fixedly connected with an insertion rod, and an insertion hole for the insertion of the insertion rod is opened at the end of the connecting rod.

[0021] By adopting the above technical solution, the connecting rod can play a positioning role for the installation cover.

[0022] Optionally, the connecting rod and the mounting cylinder are coaxially arranged.

[0023] By adopting the above technical solution, when the installation cover rotates and the scraper rod scrapes the salt from the first filter element or the second filter element, the connecting rod can position the installation cover so that the installation cover keeps rotating in place.

[0024] In summary, the present application includes at least one of the following beneficial effects:

[0025] 1. The arrangement of the first filter element and the second filter element can, on the whole, extend the service life of the filter element in the housing, so that the supply water does not have to pass through one filter element, so that the second filter element can continue to be used, and all the filter elements in the housing can be used more fully;

[0026] 2. The first filter element and the second filter element are alternately close to the water inlet pipe of the shell, so that the desalination effect of the first filter element and the second filter element can be fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of an embodiment of the present application showing that the make-up water first passes through the first filter element and then enters the second filter element;

[0028] Figure 2 is a cross-sectional view of an embodiment of the present application showing that the make-up water first passes through the second filter element and enters the first filter element;

[0029] Figure 3 It is a cross-sectional view of a scraper rod installed on a mounting cover according to an embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1. Shell; 2. First filter element; 3. Second filter element; 4. Mounting frame; 40. Mounting cylinder; 41. First filter space; 411. First filter layer; 412. Second filter layer; 42. Second filter space; 421. Third filter layer; 422. Fourth filter layer; 5. Mounting cover; 51. First water hole; 52. Second water hole; 53. Third water hole; 54. Fourth water hole; 55. Insert rod; 6. Partition; 61. First channel; 62. Second channel; 621. Through hole; 622. Connecting groove; 63. Connecting rod; 7. Sealing plug; 8. Scraper rod. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application embodiment discloses a boiler feed water desalination device. Figure 1 A boiler feed water desalination device comprises a housing 1, a first filter element 2, a second filter element 3, and a mounting frame 4 for supporting the first filter element 2 and the second filter element 3, wherein the mounting frame 4 is in the housing 1. The mounting frame 4 has a cavity, and mounting covers 5 are provided at both ends of the mounting frame 4. A partition 6 is installed in the middle of the mounting frame 4, and the partition 6 divides the cavity into a first filter space 41 and a second filter space 42. The first filter element 2 is installed in the first filter space 41, and the second filter element 3 is installed in the second filter space 42. The mounting cover 5 located in the first filter space 41 is provided with a first water hole 51, and the mounting cover 5 located in the second filter space 42 is provided with a second water hole 52, and the partition 6 is provided with a first channel 61. The first filter element 2 divides the first filter space 41 into a first filter layer 411 and a second filter layer 412, wherein the first filter layer 411 is located in the first filter element 2, and the second filter layer 412 is located outside the first filter element, and the first water hole 51 is connected to the first filter layer 411. After the replenishment water enters the first filter layer 411 from the first water hole 51 , it is filtered by the first filter element 2 and then enters the second filter layer 412 .

[0033] Reference Figure 1 The inner diameter of the first filter element 2 is smaller than the inner diameter of the second filter element 3. The second filter element 3 divides the second filter space 42 into a third filter layer 421 and a fourth filter layer 422. The third filter layer 421 is located inside the second filter element 3, and the fourth filter layer 422 is located outside the second filter element 3. The third filter layer 421 is connected to the second filter layer 412 through the first channel 61, and the fourth filter layer 422 is connected to the second water hole 52. The feed water in the second filter layer 412 enters the third filter layer 421 through the first channel 61, and the second filter element 3 continues to perform reverse osmosis desalination on the feed water. The feed water then enters the fourth filter layer 422 and flows out from the second water hole 52.

[0034] Reference Figure 1When the first filter element 2 and the second filter element 3 are desalinated, the first filter element 2 first performs the first reverse osmosis desalination, and the second filter element 3 performs the second reverse osmosis desalination. Therefore, the salt on the first filter element 2 will be more, and the salt on the second filter element 3 will be greatly reduced. The total filtration area of ​​the first filter element 2 and the second filter element 3 is similar to the filtration area of ​​an existing filter element. The first filter element 2 is replaced more times than the second filter element 3, and the second filter element 3 is used longer, so the service life of the filter element can be extended.

[0035] Reference Figure 2 After the first filter element 2 is replaced with a new one, the second filter element 3 has a little more salt than the first filter element 2. If the second filter element 3 is used for the first desalination, the first filter element 2 is used for the second desalination, and the original second filter element 3 is replaced later, the service life of the newly replaced first filter element 2 can be extended. Such operation can enable the filter elements to intercept enough salt before being replaced, and the feed water can also be effectively desalinated.

[0036] Therefore, the flow path of the feed water can be changed so that the feed water first passes through the original second filter element 3 and then enters the newly replaced first filter element 2. The installation cover 5 located in the first filter space 41 is provided with a third water hole 53, the installation cover 5 located in the second filter space 42 is provided with a fourth water hole 54, and the partition plate 6 is provided with a second channel 62. The third water hole 53 is connected to the second filter layer 412, the fourth water hole 54 is connected to the third filter layer 421, and the fourth filter layer 422 is connected to the first filter layer 411 through the second channel 62. When the second filter element 3 is used as the first filter, the feed water enters the third filter layer 421 through the fourth water hole 54, and then enters the fourth filter layer 422 through the second filter element 3, and then enters the first filter layer 411 from the second channel 62, and then enters the second filter layer 412 through the first filter element 2, and finally is discharged from the third water hole 53.

[0037] Reference Figure 1 If the supply water first passes through the first filter element 2 and then enters the second filter element 3, the third water hole 53, the fourth water hole 54 and the second channel 62 will be closed.

[0038] Reference Figure 2 If the supply water first passes through the second filter element 3 and then enters the first filter element 2, the first water hole 51, the second water hole 52 and the first channel 61 will be closed.

[0039] Reference Figure 1 and Figure 2 Therefore, a first opening and closing member for closing the first water hole 51, the second water hole 52, the third water hole 53 and the fourth water hole 54 is installed on the mounting cover 5, and a second opening and closing member for opening and closing the first channel 61 and the second channel 62 is installed on the partition 6.

[0040] The first opening and closing member and the second opening and closing member are both cylindrical sealing plugs 7, but the installation positions are different, and the sealing plugs 7 are sealed by threads.

[0041] Reference Figure 2 The second channel 62 is a curved progressive flow path, so that the feed water in the fourth filter layer 422 can enter the first filter layer 411. Through holes 621 are respectively provided on the two opposite sides of the partition 6. The central axes of the two through holes 621 are staggered with each other. The ends of the two through holes 621 close to each other are connected with a connecting groove 622. The length direction of the connecting groove 622 extends along the radial direction of the partition 6. In order to process the second flow channel, the partition 6 is made of two splicing plates spliced ​​in half. The two through holes 621 are respectively located on the two splicing plates. One side of the two splicing plates spliced ​​together has half of the groove each. The through hole 621 is connected to the groove. When the two splicing plates are spliced ​​together, the two grooves form a complete connecting groove 622.

[0042] The mounting frame also includes a mounting tube 40 with openings at both ends. The mounting tube 40 slides into the shell 1, and the outer wall of the mounting tube 40 fits the inner wall of the shell 1. The sealing caps respectively block the two openings. When the feed water enters the mounting frame to be filtered and desalted, the feed water does not contact the inner wall of the shell 1, but only contacts the inner wall of the mounting tube 40. If there are too many salt layers on the inner wall of the mounting tube 40, the entire mounting frame can be taken out of the shell 1 for cleaning.

[0043] Both ends of the installation tube 40 are respectively provided with stepped grooves, the inner walls of the stepped grooves are provided with threads, and the outer peripheral side of the cover is also provided with threads. The cover and the installation tube 40 are threadedly connected, and the filter element abuts against the cover.

[0044] The partition 6 is clamped and fixed by the first filter element 2 and the second filter element 3, so the outer peripheral side of the partition 6 only needs to be attached to the inner wall of the installation cylinder 40, and does not need to be fixed in the installation cylinder 40. When cleaning the inner wall of the installation cylinder 40, the first filter element 2, the second filter element 3 and the partition 6 can be removed. When the partition 6 slides away from the installation cylinder 40, it can also scrape the salt on the inner wall of the installation cylinder 40.

[0045] Reference Figure 3, the installation cover 5 is detachably installed with a scraper rod 8, and the scraper rod 8 can be plugged into the installation cover 5. Install it when you need to remove the salt from the first filter element 2 and the second filter element 3. When rotating the installation cover 5, the scraper rod 8 can scrape the inner wall of the first filter element 2 and the second filter element 3. The installation positions of the scraper rod 8 on the two installation covers 5 are different. The installation positions of the scraper rod 8 on the two installation covers 5 are installed according to the inner diameter size of the first filter element 2 and the second filter element 3, so that the scraper rod 8 on the two installation covers 5 contact the inner wall of the first filter element 2 and the second filter element 3 respectively. When scraping off the salt, it is best to dry the first filter element 2 and the second filter element 3 so that the salt can be analyzed and scraped off, so two installation frames 4 can be used alternately, one installation frame 4 is inside the housing 1, and the other is outside the housing 1 to position the used first filter element 2 and the second filter element 3, and the first filter element 2 and the second filter element 3 are dried by the drying equipment outside the housing 1.

[0046] Reference Figure 2 The partition plate 6 is provided with a connecting rod 63, which is coaxially arranged with the installation tube 40. The installation cover 5 is fixedly connected with an insertion rod 55, which is a round rod, and the end of the connecting rod 63 is provided with a plug hole for the insertion rod 55. The installation cover 5 is first plugged with the insertion rod 55 and the connecting rod 63, and then threadedly installed with the installation tube 40. The cooperation between the connecting rod 63 and the insertion rod 55 has a positioning effect on the installation cover 5.

[0047] Reference Figure 3 When the scraper rod 8 is installed on the mounting cover 5, the mounting cover 5 is not installed on the mounting body, and the connecting rod 63 can play a positioning role on the mounting cover 5 so that the mounting cover 5 can rotate in situ.

[0048] The implementation principle of a boiler feed water desalination device in the embodiment of the present application is:

[0049] The first filter element 2 is in the first filter space 41, and the second filter element 3 is in the second filter space 42. The feed water can first pass through the first filter element 2 and then be filtered by the second filter element 3, so that most of the salt is accumulated in the first filter element 2. When the salt in the first filter element 2 is accumulated more, the first filter element 2 can be directly removed first, and the second filter element 3 is retained, and the second filter element 3 can continue to be used; the entire mounting frame can be slid out of the shell 1, the first water hole 51, the second water hole 52 and the first channel 61 are closed, and the third water hole 53, the fourth water hole 54 and the second channel 62 are opened, and the second filter element 3 is placed close to the water inlet hole of the shell 1, so that the feed water can first pass through the original second filter element 3 and then enter the new first filter element 2, so that the second filter element 3 can continue to be used while increasing the service life of the first filter element 2. Through continuous replacement, the overall service life of the filter element is extended.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A boiler feed water desalination device, characterized in that: The invention comprises a housing (1), a first filter element (2), a second filter element (3), and a mounting frame (4) for supporting the first filter element (2) and the second filter element (3); the mounting frame (4) has a cavity therein; mounting covers (5) are provided at both ends of the mounting frame (4); a partition (6) is installed in the mounting frame (4); the partition (6) divides the cavity into a first filter space (41) and a second filter space (42); the first filter element (2) is located in the first filter space (41); the second filter element (3) is located in the second filter space (42); the mounting cover (5) located in the first filter space (41) is provided with a first water hole (51); the mounting cover (5) located in the second filter space (42) is provided with a second water hole (52); and the partition (6) is provided with a first channel (61); The first filter element (2) divides the first filter space (41) into a first filter layer (411) and a second filter layer (412); the first filter layer (411) is located inside the first filter element (2), the second filter layer (412) is located outside the first filter element (2), and the first water hole (51) is connected to the first filter layer (411); The second filter element (3) divides the second filter space (42) into a third filter layer (421) and a fourth filter layer (422); the third filter layer (421) is located inside the second filter element (3), and the fourth filter layer (422) is located outside the second filter element (3); the second filter layer (412) is connected to the third filter layer (421) via a first channel (61), and the fourth filter layer (422) is connected to the second water hole (52).

2. A boiler feed water desalination device according to claim 1, characterized in that: The mounting cover (5) located in the first filter space (41) is provided with a third water hole (53), the mounting cover (5) located in the second filter space (42) is provided with a fourth water hole (54), the partition plate (6) is provided with a second channel (62), the mounting cover (5) is provided with a first opening and closing member for opening and closing the first water hole (51), the second water hole (52), the third water hole (53), and the fourth water hole (54), the partition plate (6) is provided with a second opening and closing member for opening and closing the first channel (61) and the second channel (62), the fourth water hole (54) is communicated with the third filter layer (421), the third water hole (53) is communicated with the second filter layer (412), and the fourth filter layer (422) is communicated with the first filter layer (411) through the second channel (62).

3. A boiler feed water desalination device according to claim 1, characterized in that: The mounting frame comprises a mounting tube (40) with openings at both ends, the outer wall of the mounting tube (40) being fitted onto the inner wall of the shell (1), and the mounting cover (5) respectively blocking the two openings.

4. A boiler feed water desalination device according to claim 3, characterized in that: The outer peripheral side of the partition plate (6) is attached to the inner wall of the mounting tube (40).

5. A boiler feed water desalination device according to claim 3, characterized in that: A scraper rod (8) is mounted on the mounting cover (5).

6. A boiler feed water desalination device according to claim 5, characterized in that: The scraper rod (8) is detachably mounted on the mounting cover (5).

7. A boiler feed water desalination device according to claim 5, characterized in that: A connecting rod (63) is installed on the partition plate (6), and an insertion rod (55) is fixedly connected to the installation cover (5). An insertion hole for inserting the insertion rod (55) is provided at the end of the connecting rod (63).

8. A boiler feed water desalination device according to claim 7, characterized in that: The connecting rod (63) and the mounting cylinder (40) are coaxially arranged.

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