Deironing system for condensed water

Abstract

The invention provides a condensed water deironing system which comprises a permanent magnet deironing filter, a filter element type deironing filter and a controller, and a condensed water inlet of the permanent magnet deironing filter is connected with a condensed water incoming pipeline through a first pipeline; a condensed water outlet of the permanent magnet deironing filter is connected with a condensed water inlet of the filter element type deironing filter through a second pipeline, a condensed water outlet of the filter element type deironing filter is connected with the water outlet pipeline through a third pipeline, and the controller is used for controlling start and stop of the permanent magnet deironing filter and the filter element type deironing filter and switching of the pipelines. The permanent magnet deironing filter and the filter element type deironing filter are matched for deironing condensed water, the deironing treatment efficiency is improved, the dirt blocking speed of the filter element type deironing filter is effectively reduced, the service life of the filter element type deironing filter is prolonged, dirt blocking and corrosion of pipelines and equipment are avoided, and the deironing cost of the condensed water is reduced; the condensed water quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of industrial water treatment, in particular to a condensate water iron removal system. Background Art

[0002] In the power, chemical, metallurgical and other industries, condensed water often contains high iron ions. The water temperature of this part of condensed water is about 100℃, and some even exceed 160℃. This part of condensed water has the characteristics of high temperature, high iron content and low salt content, and has great recycling and utilization value.

[0003] However, the iron ions contained in the condensate water not only affect the water quality, but also may accelerate the corrosion of pipes and equipment, resulting in reduced production efficiency and increased equipment maintenance costs. Existing iron removal technologies, such as chemical precipitation and ion exchange, have problems such as low treatment efficiency, high cost or secondary pollution. Summary of the invention

[0004] The object of the present invention is to provide a condensate water iron removal system to solve the above technical problems.

[0005] The present invention provides a condensate deironing system, comprising a permanent magnet deironing filter, a cartridge deironing filter and a controller, wherein the condensate inlet of the permanent magnet deironing filter is connected to a condensate inlet pipeline via a first pipeline, the condensate outlet of the permanent magnet deironing filter and the condensate inlet of the cartridge deironing filter are connected via a second pipeline, the condensate outlet of the cartridge deironing filter is connected to an outlet pipeline via a third pipeline, and the controller is used to control the start and stop of the permanent magnet deironing filter and the cartridge deironing filter and the switching of pipelines.

[0006] Furthermore, a bypass pipeline is arranged between the second pipeline and the third pipeline, and both ends of the bypass pipeline are connected to the second pipeline and the third pipeline through a first three-way valve and a second three-way valve respectively. A two-way valve is installed on the bypass pipeline, and the first three-way valve, the second three-way valve and the two-way valve are electrically connected to the controller respectively.

[0007] Furthermore, the bypass pipeline is provided with a bypass branch pipe connected to the first pipeline through a third three-way valve, and the third three-way valve is electrically connected to the controller.

[0008] Furthermore, the backwash water inlet of the permanent magnetic iron removal filter is connected to the backwash water pipeline through a first backwash pipeline, a first backwash water inlet valve is installed on the first backwash pipeline, a first drain pipe is installed at the backwash water outlet of the permanent magnetic iron removal filter, a first drain valve is installed on the first drain pipe, and the first backwash water inlet valve and the first drain valve are electrically connected to the controller respectively.

[0009] Furthermore, a first exhaust pipe is provided on the permanent magnetic iron removal filter, a first exhaust valve is installed on the first exhaust pipe, and the first exhaust valve is electrically connected to the controller.

[0010] Furthermore, the backwash water inlet of the cartridge-type iron removal filter is connected to the backwash water pipeline through a second backwash pipeline, a second backwash water inlet valve is installed on the second backwash pipeline, a second drain pipe is installed at the backwash water outlet of the cartridge-type iron removal filter, a second drain valve is installed on the second drain pipe, and the second backwash water inlet valve and the second drain valve are electrically connected to the controller respectively.

[0011] Furthermore, a second exhaust pipe is provided on the cartridge-type iron removal filter, a second exhaust pipe is installed with a second exhaust valve, and the second exhaust valve is electrically connected to the controller.

[0012] Furthermore, a ceramic membrane filter is installed on the first pipeline, the water inlet of the ceramic membrane filter is connected to the condensate water pipeline, and the water outlet of the ceramic membrane filter is connected to the condensate water inlet of the permanent magnetic iron removal filter.

[0013] Furthermore, a mixing box is installed on the first pipeline, a dosing port is opened on the mixing box, a stirring assembly is arranged in the mixing box, the water inlet of the mixing box is connected to the condensate water pipeline, and the water outlet of the mixing box is connected to the water inlet of the ceramic membrane filter.

[0014] Furthermore, an online iron ion analyzer is installed at a position close to the condensate outlet of the permanent magnetic iron removal filter on the second pipeline and at a position close to the condensate outlet of the cartridge-type iron removal filter on the third pipeline, respectively, and the online iron ion analyzer is electrically connected to the controller.

[0015] The present invention removes iron from condensate water by cooperating with a permanent magnetic iron removal filter and a cartridge iron removal filter, thereby improving the iron removal treatment efficiency. The condensate water first passes through the permanent magnetic iron removal filter for iron removal treatment, which effectively reduces the dirt clogging rate of the cartridge iron removal filter, increases the service life of the cartridge iron removal filter, avoids dirt clogging and corrosion of pipelines and equipment, reduces the iron removal cost of condensate water, and improves the quality of condensate water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Description of reference numerals:

[0019] In the figure: 1-permanent magnetic iron removal filter, 11-first backwash pipeline, 12-first backwash water inlet valve, 13-first drain pipe, 14-first drain valve, 15-first return pipe, 16-first return valve, 17-first exhaust pipe, 18-first exhaust valve, 2-cartridge iron removal filter, 21-second backwash pipeline, 22-second backwash water inlet valve, 23-second drain pipe, 24-second drain valve, 25-second return pipe, 26-second return valve, 2 7-second exhaust pipe, 28-second exhaust valve, 3-first pipeline, 4-second pipeline, 41-first three-way valve, 5-third pipeline, 51-second three-way valve, 6-bypass pipeline, 61-two-way valve, 62-bypass branch pipe, 63-third three-way valve, 71-ceramic membrane filter, 72-mixing box, 8-return water tank, 81-water pump, 82-fourth three-way valve, 91-iron ion online analyzer, 92-liquid level meter, 93-flow meter, 94-alarm; DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example 1

[0024] like Figure 1 As shown:

[0025] A condensate deironing system comprises a permanent magnetic deironing filter 1 and a cartridge deironing filter 2, wherein the condensate inlet of the permanent magnetic deironing filter 1 is connected to a condensate supply pipeline via a first pipeline 3, the condensate outlet of the permanent magnetic deironing filter 1 and the condensate inlet of the cartridge deironing filter 2 are connected via a second pipeline 4, and the condensate outlet of the cartridge deironing filter 2 is connected to the outlet pipeline via a third pipeline 5.

[0026] It also includes a controller, which is used to control the start and stop of the permanent magnetic iron removal filter 1 and the filter element type iron removal filter 2 and the switching of the pipelines.

[0027] A bypass pipeline 6 is arranged between the second pipeline 4 and the third pipeline 5. Both ends of the bypass pipeline 6 are connected to the second pipeline 4 and the third pipeline 5 through a first three-way valve 41 and a second three-way valve 51 respectively. A two-way valve 61 is installed on the bypass pipeline 6. The first three-way valve 41, the second three-way valve 51 and the two-way valve 61 are electrically connected to the controller respectively.

[0028] Normal processing flow: The condensate enters the permanent magnetic iron removal filter 1 through the condensate inlet pipe and the first pipe 3 for iron removal treatment. The treated condensate flows out from the condensate outlet of the permanent magnetic iron removal filter 1 through the second pipe 4 and enters the cartridge type iron removal filter 2. The condensate is again iron-removed in the cartridge type iron removal filter 2. The condensate after two-stage treatment by the permanent magnetic iron removal filter 1 and the cartridge type iron removal filter 2 enters the outlet pipe.

[0029] If the operator detects that the iron ion content of the condensate meets the standard at the condensate outlet of the permanent magnetic iron removal filter 1, the operator can control the first three-way valve 41 through the controller to connect the second pipeline 4 and the bypass pipeline 6, and cut off the second pipeline 4 on the first three-way valve 41 leading to the condensate inlet of the filter cartridge type iron removal filter 2; at the same time, the controller controls the second three-way valve 51 to connect the third pipeline 5 and the bypass pipeline 6, and cuts off the third pipeline 5 connected to the condensate outlet of the filter cartridge type iron removal filter 2 on the second three-way valve 51, and the condensate flows out from the condensate outlet of the permanent magnetic iron removal filter 1 through the bypass pipeline 6 directly to the outlet pipeline.

[0030] By setting up the bypass pipe 6, the operator can selectively control the condensate water to remove iron only through the permanent magnetic iron removal filter 1, or to remove iron twice through the permanent magnetic iron removal filter 1 and the filter element type iron removal filter 2, thereby saving energy consumption and avoiding the problem of fouling and clogging of the filter element type iron removal filter 2 due to long-term operation.

[0031] The bypass pipeline 6 is provided with a bypass branch pipe 62 connected to the first pipeline 3 through a third three-way valve 63, and the third three-way valve 63 is electrically connected to the controller.

[0032] If the operator detects that the condensate water has a high iron ion content at the condensate outlet of the cartridge-type iron removal filter 2, the operator can control the first three-way valve 41 through the controller to keep the second pipeline 4 connected and cut off the second pipeline 4 and the bypass pipeline 6; the controller controls the second three-way valve 51 to connect the third pipeline 5 and the bypass pipeline 6, and cuts off the connection to the outlet pipeline on the second three-way valve 51; the controller controls the third three-way valve 63 to connect the bypass branch 62 with the first pipeline 3, while keeping the first pipeline 3 unobstructed.

[0033] After two-stage iron removal treatment by the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2, the condensate enters the bypass pipe 6 through the second three-way valve 51. Under the action of the two-way valve 61 on the bypass pipe 6, the condensate enters the bypass branch pipe 62 and then enters the first pipe 3. The treated condensate merges with the condensate newly entering the first pipe 3 and enters the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 again. The condensate circulates between the permanent magnetic iron removal filter 1, the cartridge iron removal filter 2, the bypass pipe 6 and the bypass branch pipe 62 for iron removal treatment until the iron ion content at the condensate outlet of the cartridge iron removal filter 2 is detected to be qualified, and the system performs the normal processing flow.

[0034] If the operator detects that the iron ion content of the condensate water at the condensate outlet of the cartridge-type iron removal filter 2 is slightly high, the operator can control the first three-way valve 41 through the controller to connect the second pipeline 4 with the bypass pipeline 6, and the second pipeline 4 remains unobstructed; the controller controls the second three-way valve 51 to connect the third pipeline 5 with the bypass pipeline 6, and the connection to the outlet pipeline on the second three-way valve 51 is cut off; the controller controls the third three-way valve 63 to keep the first pipeline 3 unobstructed, and at the same time cuts off the connection between the first pipeline 3 and the bypass branch 62.

[0035] After two-stage iron removal treatment by the permanent magnet iron removal filter 1 and the cartridge iron removal filter 2, the condensate enters the bypass pipe 6 through the second three-way valve 51. Under the action of the two-way valve 61 on the bypass pipe 6, the condensate enters the second pipe 4 through the first three-way valve 41. The treated condensate merges with the condensate newly entering the second pipe 4 and enters the cartridge iron removal filter 2 again. The condensate circulates between the cartridge iron removal filter 2 and the bypass pipe 6 for iron removal treatment until the iron ion content at the condensate outlet of the cartridge iron removal filter 2 is detected to be qualified, and the system performs normal processing flow.

[0036] The backwash water inlet of the permanent magnetic iron removal filter 1 is connected to the backwash water pipeline through the first backwash pipeline 11, and the first backwash water inlet valve 12 is installed on the first backwash pipeline 11. The backwash water outlet of the permanent magnetic iron removal filter 1 is installed with a first drain pipe 13, and the first drain valve 14 is installed on the first drain pipe 13. The first backwash water inlet valve 12 and the first drain valve 14 are electrically connected to the controller respectively.

[0037] The backwash water inlet of the permanent magnetic iron removal filter 1 is arranged near the top of the permanent magnetic iron removal filter 1, and the backwash water outlet of the permanent magnetic iron removal filter 1 is arranged at the bottom of the permanent magnetic iron removal filter 1. This arrangement enables the backwash water to thoroughly backwash the permanent magnetic iron removal filter 1 from top to bottom, thereby improving the backwash effect, and the water flow after backwashing is discharged from the bottom of the permanent magnetic iron removal filter 1, thereby avoiding the residue of backwash water and effectively improving the backwash quality.

[0038] When it is necessary to backwash the permanent magnetic iron removal filter 1, the controller controls the first three-way valve 41 to cut off the second pipeline 4 and the connection between the second pipeline 4 and the bypass pipeline 6, the controller controls the third three-way valve 63 to cut off the first pipeline 3 and the connection between the first pipeline 3 and the bypass branch 62, and the controller controls the first backwash inlet valve 12 and the first drain valve 14 to open.

[0039] Backwash water enters the permanent magnetic iron removal filter 1 from the backwash water pipeline through the first backwash pipeline 11 to loosen the dirt blockage or flush the dirt blockage on the surface of the ultrafiltration membrane, thereby realizing online backwashing of the permanent magnetic iron removal filter 1, avoiding the disassembly and assembly process of the magnetic rod in the permanent magnetic iron removal filter 1, greatly improving the backwash efficiency of the permanent magnetic iron removal filter 1, and helping to improve work efficiency.

[0040] After the backwashing operation is completed, the controller controls the first backwashing water inlet valve 12 and the first drain valve 14 to close, and the system enters the normal processing flow.

[0041] The backwash water inlet of the cartridge-type iron removal filter 2 is connected to the backwash water pipeline through the second backwash pipeline 21, and a second backwash water inlet valve 22 is installed on the second backwash pipeline 21. The backwash water outlet of the cartridge-type iron removal filter 2 is installed with a second drain pipe 23, and a second drain valve 24 is installed on the second drain pipe 23. The second backwash water inlet valve 22 and the second drain valve 24 are electrically connected to the controller respectively.

[0042] The backwash water inlet of the cartridge-type iron removal filter 2 is arranged near the top of the cartridge-type iron removal filter 2, and the backwash water outlet of the cartridge-type iron removal filter 2 is arranged at the bottom of the cartridge-type iron removal filter 2. This arrangement enables the backwash water to thoroughly backwash the cartridge-type iron removal filter 2 from top to bottom, thereby improving the backwash effect, and the water flow after backwashing is discharged from the bottom of the cartridge-type iron removal filter 2, thereby avoiding the residue of backwash water and effectively improving the backwash quality.

[0043] When it is necessary to backwash the cartridge-type iron removal filter 2, the controller controls the first three-way valve 41 to cut off the second pipeline 4 and the connection between the second pipeline 4 and the bypass pipeline 6, the controller controls the second three-way valve 51 to cut off the third pipeline 5 and the connection between the third pipeline 5 and the bypass pipeline 6, and the controller controls the second backwash inlet valve 22 and the second drain valve 24 to open.

[0044] Backwash water enters the cartridge-type iron removal filter 2 from the backwash water pipeline through the second backwash pipeline 21 to loosen the dirt blockage or flush the dirt blockage on the surface of the ultrafiltration membrane, thereby realizing online backwashing of the cartridge-type iron removal filter 2, avoiding the disassembly and assembly process of the filter element in the cartridge-type iron removal filter 2, effectively shortening the backwash time, greatly improving the backwash efficiency of the cartridge-type iron removal filter 2, and helping to improve work efficiency.

[0045] After the backwashing operation is completed, the controller controls the second backwashing water inlet valve 22 and the second drain valve 24 to close, and the system enters the normal processing flow.

[0046] In this system, the backwashing work of the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 can be performed simultaneously or separately. When one of them is backwashing, it does not affect the iron removal work of the other.

[0047] The permanent magnetic iron removal filter 1 is provided with a first exhaust pipe 17 , and a first exhaust valve 18 is installed on the first exhaust pipe 17 . The first exhaust valve 18 is electrically connected to the controller.

[0048] A second exhaust pipe 27 is provided on the cartridge-type iron removal filter 2 , and a second exhaust valve 28 is installed on the second exhaust pipe 27 . The second exhaust valve 28 is electrically connected to the controller.

[0049] When the permanent magnetic iron removal filter 1 and the cartridge type iron removal filter 2 are started for the first time, when the permanent magnetic iron removal filter 1 and / or the cartridge type iron removal filter 2 are backwashed, or when they are operated again after the magnetic rod or filter element is replaced, the gas in the permanent magnetic iron removal filter 1 and / or the cartridge type iron removal filter 2 should be discharged to prevent the accumulation of gas inside from preventing condensed water from flowing in and affecting the normal iron removal work.

[0050] When the permanent magnetic iron removal filter 1 needs to be exhausted, the controller controls the first exhaust valve 18 to open so that the gas can be exhausted through the first exhaust pipe 17; when the cartridge iron removal filter 2 needs to be exhausted, the controller controls the second exhaust valve 28 to open so that the gas can be exhausted through the second exhaust pipe 27. It should be understood that the exhaust work of the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 can be performed simultaneously or separately.

[0051] An online iron ion analyzer 91 is installed at a position close to the condensate outlet of the permanent magnetic iron removal filter 1 on the second pipeline 4 and at a position close to the condensate outlet of the cartridge-type iron removal filter 2 on the third pipeline 5 .

[0052] The iron ion online analyzer 91 is electrically connected to the controller. The iron ion content of the condensate outlet of the permanent magnetic iron removal filter 1 and the condensate outlet of the cartridge iron removal filter 2 is detected by the iron ion online analyzer 91. The iron ion online analyzer 91 transmits the detected value to the controller. The controller compares the detected value with the preset iron ion content and performs switching control of the pipeline to avoid errors in manual detection and improve detection efficiency and system automation.

[0053] Example 2

[0054] A ceramic membrane filter 71 is installed on the first pipeline 3 , the water inlet of the ceramic membrane filter 71 is connected to the condensate water pipeline, and the water outlet of the ceramic membrane filter 71 is connected to the condensate water inlet of the permanent magnetic iron removal filter 1 .

[0055] A mixing box 72 is installed on the first pipeline 3, and a dosing port is opened on the mixing box 72. A stirring assembly is arranged in the mixing box 72. In this embodiment, the foot plate assembly in the mixing box 72 is a stirring shaft, and an ultrasonic oscillator can also be installed instead of the stirring shaft to continue the stirring and mixing work.

[0056] The water inlet of the mixing box 72 is connected to the condensate water pipeline, and the water outlet of the mixing box 72 is connected to the water inlet of the ceramic membrane filter 71 .

[0057] The operator can add sodium hydroxide at the dosing port to adjust the pH value so that the pH value of the condensate water is 7.2-7.4, and then add hydrogen peroxide solution to the condensate water with the above pH value to adjust its oxidation potential value so that its oxidation potential value is 220-270mV; finally, the divalent iron in the condensate water after modulation is oxidized into trivalent iron for subsequent iron removal work.

[0058] The iron ions in the condensate water are oxidized by adding drugs through the mixing box 72, and then preliminarily filtered through the ceramic membrane filter 71, thereby reducing the corrosion of the permanent magnetic iron removal filter 1, the filter element type iron removal filter 2 and the pipeline, and improving the quality of the condensate water.

[0059] Example 3

[0060] In this embodiment, a liquid level meter 92 is installed in the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2, respectively, and a flow meter 93 is installed on the second pipeline 4 near the condensate outlet of the permanent magnetic iron removal filter 1 and on the third pipeline 5 near the condensate outlet of the cartridge iron removal filter 2, respectively. The liquid level meter 92 and the flow meter 93 are electrically connected to the controller, respectively.

[0061] An alarm 94 electrically connected to the controller is installed on the top of the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 .

[0062] When the controller receives a signal from the liquid level meter 92 that the liquid level has increased and at the same time the flow rate detected by the flow meter 93 has decreased, the controller can determine that there is blockage in the permanent magnetic iron removal filter 1 and / or the cartridge iron removal filter 2, and the controller controls the backwashing operation and at the same time controls the alarm 94 to sound an alarm.

[0063] By providing the liquid level meter 92 and the flow meter 93, it is possible to more objectively judge whether dirt blockage occurs in the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2, thereby avoiding manual regular inspections, saving labor intensity, and improving the automation level of the system.

[0064] Example 4

[0065] In this embodiment, a first return water pipe 15 and a second return water pipe 25 are respectively arranged at the bottom of the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2, and a first return water valve 16 and a second return water valve 26 are respectively installed on the first return water pipe 15 and the second return water pipe 25, and the first return water valve 16 and the second return water valve 26 are respectively electrically connected to the controller.

[0066] The first water return pipe 15 and the second water return pipe 25 are connected to a water return tank 8, which is connected to the first pipeline 3 through a delivery pipe, on which a water pump 81 is installed, and a fourth three-way valve 82 is provided at the connection between the delivery pipe and the first pipeline 3, and the water pump 81 and the fourth three-way valve 82 are electrically connected to the controller respectively.

[0067] The fourth three-way valve 82 can be arranged between the ceramic membrane filter 71 and the mixing box 72 , or between the ceramic membrane filter 71 and the permanent magnetic iron removal filter 1 .

[0068] Before the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 are backwashed, the condensed water in the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 needs to be drained.

[0069] The controller controls the fourth three-way valve 82 to close, and the fourth three-way valve 82 cuts off the first pipeline 3.

[0070] The controller controls the first three-way valve 41 to cut off the connection between the second pipeline 4 and the bypass pipeline 6, and the controller controls the third three-way valve 63 to cut off the connection between the first pipeline 3 and the bypass branch 62, so that the condensed water no longer enters the permanent magnetic iron removal filter 1.

[0071] The controller controls the first water return valve 16 to open, and the condensed water in the permanent magnetic iron removal filter 1 is discharged into the water return tank 8 .

[0072] The controller controls the first three-way valve 41 to cut off the second pipeline 4 and the connection between the second pipeline 4 and the bypass pipeline 6, and the controller controls the second three-way valve 51 to cut off the third pipeline 5 and the connection between the third pipeline 5 and the bypass pipeline 6, so that the condensed water no longer enters the cartridge-type iron removal filter 2.

[0073] The controller controls the second water return valve 26 to open, and the condensed water in the cartridge-type iron removal filter 2 is discharged into the water return tank 8 .

[0074] After the condensed water in the permanent magnetic iron removal filter 1 and the cartridge iron removal filter 2 is drained, the controller controls the first water return valve 16 and the second water return valve 26 to close, and the system enters the backwashing operation.

[0075] When the backwashing work is completed, the controller switches the pipeline to enter normal iron removal work, and the controller controls the water pump 81 to start. At the same time, the controller controls the fourth three-way valve 82 to connect the first pipeline 3 and the delivery pipe and keep the first pipeline 3 unobstructed. The condensate in the return tank 8 enters the first pipeline 3 under the action of the water pump 81 and merges with the condensate newly entering the first pipeline 3.

[0076] By providing a return water tank 8, the condensed water in the permanent magnetic iron removal filter 1 and the cartridge type iron removal filter 2 is collected before the backwashing operation, so as to avoid the condensed water affecting the backwashing effect and improve the backwashing efficiency.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A condensate water iron removal system, characterized in that It includes a permanent magnetic iron removal filter, a cartridge iron removal filter and a controller. The condensate water inlet of the permanent magnetic iron removal filter is connected to the condensate water supply pipeline through a first pipeline, the condensate water outlet of the permanent magnetic iron removal filter and the condensate water inlet of the cartridge iron removal filter are connected through a second pipeline, and the condensate water outlet of the cartridge iron removal filter is connected to the outlet pipeline through a third pipeline. The controller is used to control the start and stop of the permanent magnetic iron removal filter and the cartridge iron removal filter and the switching of the pipelines.

2. The condensate deironing system according to claim 1, characterized in that: A bypass pipeline is arranged between the second pipeline and the third pipeline, and both ends of the bypass pipeline are connected to the second pipeline and the third pipeline through a first three-way valve and a second three-way valve respectively. A two-way valve is installed on the bypass pipeline, and the first three-way valve, the second three-way valve and the two-way valve are electrically connected to the controller respectively.

3. The condensate deironing system according to claim 2, characterized in that: The bypass pipeline is provided with a bypass branch pipe connected to the first pipeline through a third three-way valve, and the third three-way valve is electrically connected to the controller.

4. The condensate deironing system according to claim 1, characterized in that: The backwash water inlet of the permanent magnetic iron removal filter is connected to the backwash water pipeline through a first backwash pipeline, a first backwash water inlet valve is installed on the first backwash pipeline, a first drain pipe is installed at the backwash water outlet of the permanent magnetic iron removal filter, a first drain valve is installed on the first drain pipe, and the first backwash water inlet valve and the first drain valve are electrically connected to the controller respectively.

5. The condensate deironing system according to claim 1, characterized in that: The permanent magnetic iron removal filter is provided with a first exhaust pipe, the first exhaust pipe is installed with a first exhaust valve, and the first exhaust valve is electrically connected to the controller.

6. The condensate deironing system according to claim 1, characterized in that: The backwash water inlet of the cartridge-type iron removal filter is connected to the backwash water pipeline through a second backwash pipeline, a second backwash water inlet valve is installed on the second backwash pipeline, a second drain pipe is installed at the backwash water outlet of the cartridge-type iron removal filter, a second drain valve is installed on the second drain pipe, and the second backwash water inlet valve and the second drain valve are electrically connected to the controller respectively.

7. The condensate deironing system according to claim 1, characterized in that: The cartridge-type iron removal filter is provided with a second exhaust pipe, the second exhaust pipe is installed with a second exhaust valve, and the second exhaust valve is electrically connected to the controller.

8. The condensate deironing system according to claim 1, characterized in that: A ceramic membrane filter is installed on the first pipeline, the water inlet of the ceramic membrane filter is connected to the condensate water pipeline, and the water outlet of the ceramic membrane filter is connected to the condensate water inlet of the permanent magnetic iron removal filter.

9. The condensate deironing system according to claim 8, characterized in that: A mixing box is installed on the first pipeline, a dosing port is opened on the mixing box, a stirring assembly is arranged in the mixing box, a water inlet of the mixing box is connected to the condensate water pipeline, and a water outlet of the mixing box is connected to the water inlet of the ceramic membrane filter.

10. The condensate deironing system according to claim 1, characterized in that: An online iron ion analyzer is installed at a position close to the condensate outlet of the permanent magnetic iron removal filter on the second pipeline and at a position close to the condensate outlet of the cartridge-type iron removal filter on the third pipeline, respectively, and the online iron ion analyzer is electrically connected to the controller.

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