Formaldehyde stripping device and formaldehyde removal process using the same

Abstract

The present application relates to the technical field of formaldehyde sewage treatment, and discloses a formaldehyde stripping device and a formaldehyde removal process using the same, which comprises a heating box, a water source for generating steam is arranged in the heating box, a first conveying pump is fixedly installed on the outer surface of the heating box, a stripping box is installed on the top of the heating box, a first gas collecting hood is installed on the top of the stripping box, a first condensing box and a second condensing box are arranged on the back of the heating box and the stripping box, the first condensing box and the second condensing box are communicated through a connecting shell, a second conveying pump is fixedly installed on the outer surface of the first condensing box, and a treatment box is installed on the left side of the heating box. The formaldehyde stripping device and the formaldehyde removal process using the same have the advantages that the formaldehyde gas stripped out can be effectively treated, the process is simple, and it is harmless.

Description

Technical Field

[0001] This invention relates to the field of formaldehyde wastewater treatment technology, specifically to a formaldehyde stripping device and a formaldehyde removal process using the device. Background Technology

[0002] Formaldehyde is an important industrial raw material, widely used in the production of chemicals, pharmaceuticals, wood preservatives, and adhesives. However, the production process often generates a certain amount of high-concentration formaldehyde wastewater. Because formaldehyde is highly toxic to humans and other organisms, if not properly treated, this formaldehyde wastewater will seriously pollute the environment, damage the ecosystem, and endanger human health.

[0003] Currently, the formaldehyde stripping method utilizes the characteristics of formaldehyde being easily soluble in water, having a low boiling point, and being highly volatile. Formaldehyde in production wastewater is pretreated by steam stripping to reduce the load on subsequent treatment processes and improve treatment efficiency. Due to the toxicity of formaldehyde gas, it cannot be directly emitted. Therefore, a formaldehyde stripping device and a formaldehyde removal process using this device are needed to effectively treat the stripped formaldehyde. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a formaldehyde stripping device and a formaldehyde removal process using the device, which has the advantages of effectively treating the stripped formaldehyde gas, simple process, and harmless operation.

[0006] (II) Technical Solution

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A formaldehyde stripping device includes a heating box containing a water source for generating steam. A first delivery pump is fixedly installed on the outer surface of the heating box. A stripping box is installed on the top of the heating box, and a first gas collecting hood is installed on the top of the stripping box. A first condensing box and a second condensing box are located on the back of the heating box and the stripping box, respectively. The first condensing box and the second condensing box are connected by a connecting shell. A second delivery pump is fixedly installed on the outer surface of the first condensing box. A processing box is installed on the left side of the heating box. A lifting mechanism is provided on the processing box. A second gas collecting hood is installed on the outer surface of the processing box. A cleaning mechanism is provided on the lifting mechanism. A first sealing mechanism and a second sealing mechanism are respectively provided inside the heating box. A connecting groove is opened between the heating box, the first condensing box, and the processing box, and is sealed by the first sealing mechanism and the second sealing mechanism. The first sealing mechanism is located above the second sealing mechanism, and the two have the same structure.

[0008] The heating box, the first delivery pump, and the stripping box are all connected by a first pipe. The stripping box and the first condensing box are connected by a second pipe. The second condensing box, the second delivery pump, and the processing box are connected by a third pipe.

[0009] The lifting mechanism includes a mounting plate fixedly installed on the surface of the blow-off box. A lifting motor is mounted on the top surface of the mounting plate, and a winding wheel is mounted on the output end of the lifting motor. Two sets of first lifting rods are symmetrically installed on the bottom surface of the mounting plate. A cover plate is installed at the bottom end of the first lifting rod. A rope end fixing block is installed on the top surface of the cover plate, and a steel wire rope is connected to the rope end fixing block. Two sets of sleeves are symmetrically installed on the bottom surface of the cover plate. A fastening knob is threaded on the surface of each set of sleeves. A second lifting rod is provided inside each set of sleeves. A placement frame is installed at the bottom end of the two sets of second lifting rods.

[0010] A vertical plate is mounted on the top surface of the mounting plate, and a transmission rod is installed between the output end of the lifting motor and the vertical plate. A winding wheel is mounted on the surface of the transmission rod, and the top end of the wire rope is wound around the surface of the winding wheel, while the other end is connected to the rope end fixing block.

[0011] The bottom surface of the placement frame is provided with a filter screen, and the placement frame is suspended inside the processing box by a second hanger and fixed by a fastening knob.

[0012] The cleaning mechanism includes a long rod slidably connected inside the treatment box. One end of the long rod is connected to a cleaning brush, and the other end is equipped with a sealing block. A threaded rod is installed on the surface of the treatment box, a baffle is sleeved on the surface of the threaded rod, and a nut is threaded onto the surface of the threaded rod.

[0013] The surface of the sealing block is fitted with a rectangular rubber block, and a slag discharge trough adapted to the rectangular rubber block is opened on one side surface of the treatment box. One end of the long rod is installed with the rectangular rubber block, and the baffle is fastened to the treatment box by a threaded rod and a nut.

[0014] The first sealing mechanism includes a push-pull rod that is slidably connected inside the heating box. One end of the push-pull rod is connected to an installation head, and the other end is connected to a fixing plate. A pull ring is installed on the surface of the installation head, and a sealing block is installed on the surface of the fixing plate. Two sets of limiting rods are symmetrically arranged on the other side surface of the fixing plate.

[0015] The surface of the heating box is provided with threaded holes that are compatible with the mounting head. Both ends of the limiting rod are installed on the inner wall of the heating box, and the fixing plate is slidably connected to the surface of the limiting rod.

[0016] The formaldehyde removal process using this device includes the following steps:

[0017] S1. The lifting motor drives the winding wheel to rotate, and the winding wheel winds up the wire rope. At this time, the placement frame is lifted upward. After the placement frame is exposed, the slag just taken out from the boiler is placed in the placement frame.

[0018] S2. Then, the lifting motor drives the placement frame to retract into the processing box and is sealed by the cover plate;

[0019] S3. Pass the steam generated by the heating box into the stripping box and strip the formaldehyde wastewater inside the stripping box.

[0020] S4. The gas generated by the stripping includes steam and formaldehyde gas. At this time, the mixed gas enters the first condenser box through the first gas collection hood. The temperature inside the first condenser box can turn water vapor into water and temporarily store it in the first condenser box.

[0021] S5. Subsequently, formaldehyde gas rises through the connecting shell and enters the second condensing chamber, where it is cooled into formaldehyde liquid. The formaldehyde liquid is then sprayed onto the slag by the second delivery pump. When the formaldehyde encounters high temperature, it reacts rapidly to produce carbon dioxide and water. The water will pass through the filter screen and settle in the treatment chamber. The filter screen can filter the water.

[0022] S6. After the water in the heating box has been used up, rotate the pull ring to separate the installation head from the treatment box, which will open the sealing block, allowing the water temporarily stored in the first condensation box and the water temporarily stored in the treatment box to enter the heating box for recycling.

[0023] The beneficial effects of this invention are:

[0024] 1) The formaldehyde stripping device and the formaldehyde removal process using the device can separate the formaldehyde gas and water vapor generated during the stripping process, and condense the water vapor for recycling, effectively saving water resources.

[0025] 2) The formaldehyde stripping device and the formaldehyde removal process using the device utilize the reaction of high-temperature slag with formaldehyde liquid to produce carbon dioxide and water. The carbon dioxide can be collected and utilized, while the water produced is filtered by a filter screen. The slag can also be recycled, further saving water resources. It is environmentally friendly and efficient, and can also bring corresponding benefits.

[0026] 3) The formaldehyde stripping device and the formaldehyde removal process using the device require timely replacement of the slag after each reaction. This is achieved by using a lifting motor to drive the placement frame out of the treatment box, then loosening the fastening knob to disassemble the placement frame and replace the slag. After replacement, the placement frame is reinstalled and reset by the lifting motor, and then it can be used normally. The structure is simple and the operation is easy. Attached Figure Description

[0027] Figure 1 This is the front view of the present invention;

[0028] Figure 2 This is the left view of the present invention;

[0029] Figure 3 This is a right view of the present invention;

[0030] Figure 4 This is a top view of the present invention;

[0031] Figures 5-6 This is a schematic diagram of the lifting mechanism structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the mounting structure of the placement frame of the present invention;

[0033] Figure 8 This is a top view of the placement frame of the present invention;

[0034] Figure 9 This is a schematic diagram of the installation of the first and second blocking mechanisms of the present invention;

[0035] Figure 10 This is a schematic diagram of the first sealing mechanism of the present invention.

[0036] In the diagram: 1. Heating box; 2. First transfer pump; 3. Blowout box; 4. First gas collection hood; 5. First condensation box; 6. Second condensation box; 7. Connecting shell; 8. Second transfer pump; 9. Processing box; 10. Lifting mechanism; 1001. Mounting plate; 1002. Lifting motor; 1003. Rewinding reel; 1004. First lifting rod; 1005. Cover plate; 1006. Rope end fixing block; 1007. Steel wire rope; 1008. Sleeve; 1009. Fastening knob; 1010, Second lifting rod; 1011, Placement frame; 11, Second gas collection hood; 12, Cleaning mechanism; 1201, Long rod; 1202, Cleaning brush; 1203, Sealing block; 1204, Threaded rod; 1205, Baffle; 1206, Nut; 13, First sealing mechanism; 1301, Push-pull rod; 1302, Mounting head; 1303, Pull ring; 1304, Fixing plate; 1305, Limiting rod; 1306, Sealing block; 14, Second sealing mechanism. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1, by Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 and Figure 10 A formaldehyde stripping device is provided, comprising a heating chamber 1 containing a water source for generating steam, a first delivery pump 2 fixedly installed on the outer surface of the heating chamber 1, a stripping chamber 3 installed on the top of the heating chamber 1, a first gas collection hood 4 installed on the top of the stripping chamber 3, a first condensing chamber 5 and a second condensing chamber 6 on the back of the heating chamber 1 and the stripping chamber 3, which are connected by a connecting shell 7, a second delivery pump 8 fixedly installed on the outer surface of the first condensing chamber 5, a processing chamber 9 installed on the left side of the heating chamber 1, a second gas collection hood 11 installed on the outer surface of the processing chamber 9, a first sealing mechanism 13 and a second sealing mechanism 14 respectively provided inside the heating chamber 1, and a connecting groove is provided between the heating chamber 1 and the first condensing chamber 5 and the processing chamber 9, which are sealed by the first sealing mechanism 13 and the second sealing mechanism 14. The first sealing mechanism 13 is located above the second sealing mechanism 14, and the two have the same structure.

[0039] The first sealing mechanism 13 includes a push-pull rod 1301 slidably connected in the heating box 1. One end of the push-pull rod 1301 is connected to an installation head 1302, and the other end is connected to a fixing plate 1304. A pull ring 1303 is installed on the surface of the installation head 1302, and a sealing block 1306 is installed on the surface of the fixing plate 1304. Two sets of limiting rods 1305 are symmetrically arranged on the other side surface of the fixing plate 1304.

[0040] Specifically, the heating box 1, the first transfer pump 2, and the stripping box 3 are all connected by a first pipe, the stripping box 3 is connected to the first condensing box 5 by a second pipe, and the second condensing box 6, the second transfer pump 8, and the processing box 9 are connected by a third pipe.

[0041] Specifically, the surface of the heating box 1 is provided with threaded holes that are compatible with the mounting head 1302, both ends of the limiting rod 1305 are installed on the inner wall of the heating box 1, and the fixing plate 1304 is slidably connected to the surface of the limiting rod 1305.

[0042] In the above embodiments, formaldehyde gas and water vapor generated during the stripping process can be separated, and the water vapor can be condensed and recycled, effectively saving water resources.

[0043] Example 2, by Figure 1-8As shown in Embodiment 1, a lifting mechanism 10 is provided on the processing box 9, and a cleaning mechanism 12 is provided on the lifting mechanism 10. The lifting mechanism 10 includes a mounting plate 1001 fixedly installed on the surface of the blow-off box 3. A lifting motor 1002 is installed on the top surface of the mounting plate 1001, and a winding wheel 1003 is installed at the output end of the lifting motor 1002. Two sets of first lifting rods 1004 are symmetrically installed on the bottom surface of the mounting plate 1001. A cover plate 1005 is installed at the bottom of 4. A rope end fixing block 1006 is installed on the top surface of the cover plate 1005. A steel wire rope 1007 is connected to the rope end fixing block 1006. Two sets of sleeves 1008 are symmetrically installed on the bottom surface of the cover plate 1005. A fastening knob 1009 is threaded on the surface of each set of sleeves 1008. A second lifting rod 1010 is provided inside each set of sleeves 1008. A placement frame 1011 is installed at the bottom of the two sets of second lifting rods 1010.

[0044] The cleaning mechanism 12 includes a long rod 1201 slidably connected inside the treatment box 9. One end of the long rod 1201 is connected to a cleaning brush 1202, and the other end is equipped with a sealing block 1203. A threaded rod 1204 is installed on the surface of the treatment box 9. A baffle 1205 is sleeved on the surface of the threaded rod 1204, and a nut 1206 is threaded on the surface of the threaded rod 1204.

[0045] Specifically, a vertical plate is installed on the top surface of the mounting plate 1001, and a transmission rod is installed between the output end of the lifting motor 1002 and the vertical plate. The winding wheel 1003 is installed on the surface of the transmission rod. The top end of the wire rope 1007 is wound around the surface of the winding wheel 1003, and the other end is connected to the rope end fixing block 1006. A filter screen is provided on the bottom surface of the placement frame 1011, and the placement frame 1011 is suspended inside the processing box 9 by the second hanging rod 1010 and fixed by the fastening knob 1009.

[0046] Specifically, a rectangular rubber block is installed on the surface of the sealing block 1203, and a slag discharge trough adapted to the rectangular rubber block is opened on one side surface of the treatment box 9. One end of the long rod 1201 is installed with the rectangular rubber block, and the baffle 1205 is fastened to the treatment box 9 by the threaded rod 1204 and the nut 1206.

[0047] In the above embodiments, high-temperature slag reacts with formaldehyde liquid to produce carbon dioxide and water. The carbon dioxide can be collected and utilized, while the water produced is filtered through a filter screen to remove the slag and can be recycled, further saving water resources. This method is environmentally friendly and efficient, while also bringing corresponding benefits. After each reaction, the slag needs to be replaced promptly. This is achieved by the lifting motor 1002 driving the placement frame 1011 out of the treatment box 9. Then, the fastening knob 1009 is loosened to disassemble the placement frame 1011 and replace the slag. After replacement, the placement frame 1011 is reinstalled and reset by the lifting motor 1002, allowing it to be used normally. The structure is simple and the operation is easy.

[0048] The formaldehyde removal process using this device includes the following steps:

[0049] S1. The lifting motor 1002 drives the winding wheel 1003 to rotate, and the winding wheel 1003 winds up the wire rope 1007. At this time, the placement frame 1011 is lifted upward. After the placement frame 1011 is exposed, the slag just taken out from the boiler is placed in the placement frame 1011.

[0050] S2. Then, the lifting motor 1002 drives the placement frame 1011 to retract into the processing box 9 and is sealed by the cover plate 1005.

[0051] S3. The steam generated by the heating box 1 is introduced into the stripping box 3 to strip the formaldehyde wastewater inside the stripping box 3.

[0052] S4. The gas generated by the stripping includes steam and formaldehyde gas. At this time, the mixed gas enters the first condenser box 5 through the first gas collection hood 4. The temperature inside the first condenser box 5 can turn water vapor into water and temporarily store it in the first condenser box 5.

[0053] S5. Subsequently, formaldehyde gas rises through the connecting shell 7 and enters the second condensing box 6, where it is cooled into formaldehyde liquid. The formaldehyde liquid is then sprayed onto the slag by the second delivery pump 8. When the formaldehyde encounters high temperature, it reacts rapidly to produce carbon dioxide and water. The water will pass through the filter screen and settle in the treatment box 9. The water can be filtered through the filter screen.

[0054] S6. After the water in the heating box 1 has been used up, rotate the pull ring 1303 to separate the mounting head 1302 from the treatment box 9, which will open the sealing block 1306, allowing the water temporarily stored in the first condensation box 5 and the water temporarily stored in the treatment box 9 to enter the heating box 1 for circulation.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element, and the terms "left," "right," "top," and "bottom" as used herein are used as... Figure 1 The term "front" and "back" as used in this article refers to the position of the dispensing device when the operator is facing it; the part closer to the operator is considered "front," and the part further away is considered "back."

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A formaldehyde stripping device, characterized in that: The device includes a heating chamber (1) containing a water source for generating steam. A first delivery pump (2) is fixedly installed on the outer surface of the heating chamber (1). A stripping chamber (3) is installed on the top of the heating chamber (1), and a first gas collection hood (4) is installed on the top of the stripping chamber (3). A first condensing chamber (5) and a second condensing chamber (6) are provided on the back of the heating chamber (1) and the stripping chamber (3). The first condensing chamber (5) and the second condensing chamber (6) are connected by a connecting shell (7). A second delivery pump (8) is fixedly installed on the outer surface of the first condensing chamber (5). A processing chamber (9) is installed on the left side of the heating chamber (1), and a lifting mechanism (10) is provided on the processing chamber (9). The outer surface of the processing box (9) is equipped with a second gas collection hood (11), and the lifting mechanism (10) is equipped with a cleaning mechanism (12). The interior of the heating box (1) is equipped with a first sealing mechanism (13) and a second sealing mechanism (14). A connecting groove is provided between the heating box (1) and the first condensing box (5) and between the heating box (1) and the processing box (9), and the groove is sealed by the first sealing mechanism (13) and the second sealing mechanism (14). The first sealing mechanism (13) is located above the second sealing mechanism (14), and the two have the same structure. The heating box (1), the first conveying pump (2) and the stripping box (3) are all connected by a first pipe. (3) It is connected to the first condenser (5) through a second pipe, and the second condenser (6), the second transfer pump (8) and the processing tank (9) are connected through a third pipe; the lifting mechanism (10) includes a mounting plate (1001) fixedly installed on the surface of the blow-off box (3), a lifting motor (1002) is installed on the top surface of the mounting plate (1001), a winding wheel (1003) is installed at the output end of the lifting motor (1002), two sets of first lifting rods (1004) are symmetrically installed on the bottom surface of the mounting plate (1001), a cover plate (1005) is installed at the bottom end of the first lifting rod (1004), and a rope end is installed on the top surface of the cover plate (1005). A fixing block (1006) is provided, and a steel wire rope (1007) is connected to the rope fixing block (1006). Two sets of sleeves (1008) are symmetrically installed on the bottom surface of the cover plate (1005). Each set of sleeves (1008) is threaded with a fastening knob (1009). A second hanging rod (1010) is provided in each set of sleeves (1008). A placement frame (1011) is installed at the bottom end of the two sets of second hanging rods (1010). A filter screen is provided on the bottom surface of the placement frame (1011). The placement frame (1011) is suspended inside the processing box (9) by the second hanging rod (1010) and fixed by the fastening knob (1009).The first sealing mechanism (13) includes a push-pull rod (1301) slidably connected in the heating box (1). One end of the push-pull rod (1301) is connected to an installation head (1302), and the other end is connected to a fixing plate (1304). A pull ring (1303) is installed on the surface of the installation head (1302), and a sealing block (1306) is installed on the surface of the fixing plate (1304). Two sets of limiting rods (1305) are symmetrically arranged on the other side surface of the fixing plate (1304). Its working process is as follows: S1. Drive the winding wheel (1003) to rotate by the lifting motor (1002), and wind up the wire rope (1007) by the winding wheel (1003). At this time, the placement frame (1011) is lifted upward. After the placement frame (1011) is exposed, place the slag that has just been taken out of the boiler into the placement frame (1011). S2, The lifting motor (1002) then drives the placement frame (1011) to retract into the processing box (9) and is sealed by the cover plate (1005); S3. The steam generated by the heating box (1) is introduced into the stripping box and the formaldehyde wastewater inside the stripping box (3) is stripped. S4. The gas generated by the stripping includes steam and formaldehyde gas. At this time, the mixed gas enters the first condenser (5) through the first gas collection hood (4). The temperature inside the first condenser (5) causes the water vapor to turn into water and temporarily store it in the first condenser (5). S5. Then the formaldehyde gas floats upward through the connecting shell (7) into the second condensing box (6) and cools into formaldehyde liquid. Then the formaldehyde liquid is sprayed onto the slag by the second delivery pump (8). When the formaldehyde encounters high temperature, it reacts rapidly to produce carbon dioxide and water. The water will pass through the filter screen and be deposited in the treatment box (9). The water can be filtered through the filter screen. S6. After the water source in the heating box (1) is used up, rotate the pull ring (1303) to drive the installation head (1302) to separate from the heating box (1), and drive the sealing block (1306) to open, so that the water temporarily stored in the first condensation box (5) and the water temporarily stored in the treatment box (9) can enter the heating box (1) for circulation.

2. The formaldehyde stripping device according to claim 1, characterized in that: A vertical plate is installed on the top surface of the mounting plate (1001), and a transmission rod is installed between the output end of the lifting motor (1002) and the vertical plate. A winding wheel (1003) is installed on the surface of the transmission rod, and the top end of the wire rope (1007) is wound around the surface of the winding wheel (1003), and the other end is connected to the rope end fixing block (1006).

3. The formaldehyde stripping device according to claim 2, characterized in that: The cleaning mechanism (12) includes a long rod (1201) slidably connected inside the treatment box (9). One end of the long rod (1201) is connected to a cleaning brush (1202), and the other end is equipped with a sealing block (1203). A threaded rod (1204) is installed on the surface of the treatment box (9). A baffle (1205) is sleeved on the surface of the threaded rod (1204), and a nut (1206) is threaded on the surface of the threaded rod (1204).

4. The formaldehyde stripping device according to claim 3, characterized in that: The surface of the sealing block (1203) is fitted with a rectangular rubber block. A slag discharge trough adapted to the rectangular rubber block is opened on one side surface of the treatment box (9). One end of the long rod (1201) is installed with the rectangular rubber block, and the baffle (1205) is fastened to the treatment box (9) by a threaded rod (1204) and a nut (1206).

5. The formaldehyde stripping device according to claim 4, characterized in that: The surface of the heating box (1) is provided with threaded holes that are compatible with the mounting head (1302). Both ends of the limiting rod (1305) are installed on the inner wall of the heating box (1), and the fixing plate (1304) is slidably connected to the surface of the limiting rod (1305).

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