Yellow phosphorus tail gas treatment equipment with efficient purification function

Abstract

The utility model discloses yellow phosphorus tail gas treatment equipment with an efficient purification function, which comprises a scrubber tower communicated with a water ring vacuum pump. The other end of the water ring vacuum pump is communicated with a first water washing tower, and the first water washing tower is communicated with an adsorption tower; the two groups of adsorption towers are arranged in parallel, one group of adsorption towers is open, the other group of adsorption towers is standby, and meanwhile, the adsorption tower on the right side is communicated with a desulfurization tower; the desulfurizing tower is communicated with a second water washing tower; the second water washing tower is communicated with four groups of alkaline washing towers, the four groups of alkaline washing towers are connected in series, and the alkaline washing tower on the right side can discharge treated tail gas. According to the yellow phosphorus tail gas treatment equipment with the efficient purification function, two groups of adsorption towers connected in series and three groups of alkaline washing towers connected in parallel are arranged, so that the adsorption towers and the alkaline washing towers are matched to perform desulfurization and dephosphorization treatment on yellow phosphorus tail gas, and the purification effect on the yellow phosphorus tail gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of yellow phosphorus tail gas treatment, in particular to yellow phosphorus tail gas treatment equipment with high-efficiency purification function. Background Art

[0002] Yellow phosphorus generally refers to white phosphorus. The tail gas generated during the production of yellow phosphorus has high energy. In order to make reasonable use of the yellow phosphorus tail gas, it is necessary to use yellow phosphorus tail gas purification equipment to purify the yellow phosphorus tail gas;

[0003] Publication No. "CN213761245U" is a yellow phosphorus tail gas purification device, including a base plate, a control electric box, a first cleaning box, a second cleaning box and a first storage box; a control electric box is fixedly installed on one side of the top of the base plate, a fan is fixedly installed at a position near the control electric box on the top of the base plate, and the fan is electrically connected to the control electric box through a wire, a first cleaning box is fixedly installed at a position near the fan on the top of the base plate through a first welding rod, and a water source is stored in the inner bottom of the first cleaning box; the equipment removes most of the impurities in the yellow phosphorus tail gas by water washing, and then undergoes alkali washing again, at which time less alkali solution is required, saving the amount of alkali solution used, and after the alkali solution has been used for a period of time, the reducing agent in the second storage box can be added to the first storage box to reduce the deteriorated alkali solution to form alkali solution again, which can be used again, thereby further saving the amount of alkali solution used;

[0004] The purification equipment reduces the amount of alkali solution by adding a reducing agent, but there are sulfides and elemental phosphorus in the yellow phosphorus tail gas. If the yellow phosphorus tail gas is used to produce formate products and as a heat source fuel, the impurities in the product will increase. Among them, the sulfide acid gas and the metaphosphoric acid produced by the combustion of phosphorus will cause serious corrosion to the equipment, which is not conducive to the use of yellow phosphorus tail gas. Therefore, we have proposed a yellow phosphorus tail gas treatment equipment with high-efficiency purification function that can solve the above problems well. Utility Model Content

[0005] The purpose of the utility model is to provide a yellow phosphorus tail gas treatment device with high-efficiency purification function, so as to solve the problem proposed in the above background technology that the purification equipment on the market currently reduces the amount of alkali solution by adding a reducing agent, but there are sulfides and elemental phosphorus in the yellow phosphorus tail gas. If the yellow phosphorus tail gas is used to produce formate products and as a heat source fuel, the impurities in the product will increase. Among them, the sulfide acid gas and the metaphosphoric acid produced by the combustion of phosphorus will corrode the equipment seriously, which is not conducive to the use of the yellow phosphorus tail gas.

[0006] To achieve the above object, the utility model provides the following technical solution: a yellow phosphorus tail gas treatment device with high-efficiency purification function, comprising a scrubber, wherein the scrubber is provided with five groups, and the five groups of scrubbers are arranged in series, and the right scrubber is connected to a water ring vacuum pump;

[0007] It also includes: the other end of the water ring vacuum pump is connected to a first water washing tower, and the first water washing tower is provided with three groups, and the three groups of first water washing towers are arranged in series, and the first water washing tower on the right side is connected to an adsorption tower;

[0008] The adsorption tower is provided with two groups, and the two groups of adsorption towers are arranged in parallel, and the two groups of adsorption towers are arranged with one in operation and one in standby, and the right adsorption tower is connected to the desulfurization tower;

[0009] The desulfurization tower is provided with two groups, and the two groups of desulfurization towers are arranged in series, and the right desulfurization tower is connected to the second water washing tower;

[0010] The second water washing tower is provided with three groups, and the three groups of second water washing towers are arranged in series, and the second water washing tower on the right is connected to the alkali washing tower, and the alkali washing tower is provided with four groups, and the four groups of alkali washing towers are arranged in series, and the alkali washing tower on the right can discharge the treated exhaust gas.

[0011] Preferably, the desulfurization tower on the right is connected to an exhaust pipe, and the exhaust pipe can discharge a portion of the exhaust gas as a heat source raw material.

[0012] Preferably, an activated carbon plate is fixedly installed on the upper inner side of the adsorption tower, and a cleaning rod is contacted and connected to the lower surface of the activated carbon plate, and the cleaning rod is rotatably arranged on the inner side of the adsorption tower.

[0013] Preferably, the cleaning rod is arranged in a "T"-shaped structure when viewed from the front, and a second bevel gear is fixedly installed on the outer side below the cleaning rod, and the upper end of the second bevel gear is meshedly connected with the first bevel gear.

[0014] Preferably, a rotating rod is fixedly installed on the right side of the first bevel gear, and the right end of the rotating rod is arranged to penetrate the adsorption tower, and the right end of the rotating rod is fixedly connected to a cam.

[0015] Preferably, the cam is provided with two groups of adsorption towers corresponding to the cam, and the two groups of adsorption towers are meshedly connected with threaded rods.

[0016] Preferably, the threaded rod is rotatably arranged outside the adsorption tower, and the rear end of the threaded rod is fixedly connected to the end of the output shaft of the driving motor.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the yellow phosphorus tail gas treatment equipment with high-efficiency purification function is arranged by two groups of adsorption towers connected in series and three groups of alkali washing towers connected in parallel, so that the adsorption towers and the alkali washing towers can cooperate to desulfurize and remove phosphorus from the yellow phosphorus tail gas, which is beneficial to improve the purification effect of the yellow phosphorus tail gas. The specific contents are as follows:

[0018] (1) adsorption towers are provided so that the yellow phosphorus tail gas enters two parallel adsorption towers. Since activated carbon plates are provided in the adsorption towers, elemental phosphorus and other mechanical impurities in the yellow phosphorus tail gas can be adsorbed and removed by the activated carbon plates. The two groups of adsorption towers are arranged in a one-on-one standby mode, which is beneficial to the maintenance of the activated carbon plates in the adsorption towers while treating the yellow phosphorus tail gas, thereby facilitating the treatment efficiency of the yellow phosphorus tail gas.

[0019] (2) An alkali washing tower is provided, which further absorbs the acidic gas in the tail gas by injecting caustic soda solution to ensure a high carbon monoxide content in the tail gas, thereby ensuring the quality of the formate product;

[0020] (3) A cleaning rod is provided, and a driving motor is controlled to be turned on, so that the driving motor drives the two sets of cams to rotate through the threaded rod, and the cam drives the first bevel gear to rotate through the rotating rod, and the first bevel gear drives the cleaning rod to rotate through the second bevel gear. Since the cleaning rod is in contact with and connected to the lower surface of the activated carbon plate, and the cleaning rod is arranged in a "T" shape when viewed in cross section, the rotation of the cleaning rod will clean the lower surface of the activated carbon plate, thereby avoiding clogging of the lower surface of the activated carbon plate, which is beneficial to prolonging the service life of the activated carbon plate 14;

[0021] (4) A first water scrubber and a second water scrubber are provided, and pollutants in the yellow phosphorus tail gas can be removed by the first water scrubber and the second water scrubber, including toxic substances and heavy metals in the yellow phosphorus tail gas; thereby effectively reducing the biological load of water pollutants. Since the first water scrubber and the second water scrubber are provided in series in three groups, the first water scrubber and the second water scrubber can improve the effect of pollutant removal.

[0022] (5) a water ring vacuum pump is provided, and the water ring vacuum pump is controlled to be turned on so that the water ring vacuum pump introduces the yellow phosphorus tail gas into the four groups of first water washing towers, thereby starting to purify the yellow phosphorus tail gas. The water ring vacuum pump improves the efficiency of the discharge of the yellow phosphorus tail gas, which is conducive to improving the purification efficiency of the yellow phosphorus tail gas;

[0023] (6) A desulfurization tower is provided, and the yellow phosphorus tail gas is passed into two desulfurization towers installed in series. The sulfide in the yellow phosphorus tail gas is removed by the desulfurization tower. The desulfurization tower uses a solution reagent prepared first, called lean solution, for washing. The solution after washing and absorption is called rich solution for regeneration treatment. After the sulfide is removed, part of the tail gas is discharged through an exhaust pipe as a heat source raw material, and part of it is used as a raw material for the production of formate products, thereby reusing the yellow phosphorus tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the front view structure of the gas washing tower of the utility model;

[0025] Figure 2 This is a schematic diagram of the front cross-section structure of the adsorption tower of the utility model;

[0026] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0027] Figure 4 This is a schematic diagram of the top view of the adsorption tower of the utility model;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the cam of the utility model;

[0029] Figure 6 This is a schematic diagram of the tail gas treatment process of the utility model.

[0030] In the figure: 1. gas washing tower; 2. water ring vacuum pump; 3. first water washing tower; 4. adsorption tower; 5. desulfurization tower; 6. threaded rod; 7. alkali washing tower; 8. driving motor; 9. cam; 10. rotating rod; 11. first bevel gear; 12. second bevel gear; 13. cleaning rod; 14. activated carbon plate; 15. exhaust pipe; 16. second water washing tower. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Example 1: Solved problem, please refer to Figure 1-Figure 6 The utility model provides a technical solution: a yellow phosphorus tail gas treatment device with high-efficiency purification function, comprising a scrubber 1, wherein the scrubber 1 is provided with five groups, and the five groups of scrubbers 1 are arranged in series, and the right scrubber 1 is connected to a water ring vacuum pump 2;

[0033] It also includes: the other end of the water ring vacuum pump 2 is connected to a first water washing tower 3, and the first water washing tower 3 is provided with three groups, and the three groups of first water washing towers 3 are arranged in series, and the first water washing tower 3 on the right side is connected to an adsorption tower 4;

[0034] There are two groups of adsorption towers 4, and the two groups of adsorption towers 4 are arranged in parallel, and the two groups of adsorption towers 4 are arranged in one open and one standby, and the right adsorption tower 4 is connected to the desulfurization tower 5; there are two groups of desulfurization towers 5, and the two groups of desulfurization towers 5 are arranged in series, and the right desulfurization tower 5 is connected to the second water washing tower 16; there are three groups of second water washing towers 16, and the three groups of second water washing towers 16 are arranged in series, and the right second water washing tower 16 is connected to the alkali washing tower 7, and there are four groups of alkali washing towers 7, and the four groups of alkali washing towers 7 are arranged in series, and the right alkali washing tower 7 can discharge the treated tail gas;

[0035] First, the yellow phosphorus is processed through a phosphorus furnace, at which time the phosphorus furnace will discharge yellow phosphorus tail gas, and then the phosphorus tail gas is injected into five groups of scrubbers 1. Since the five groups of scrubbers 1 are arranged in series, the five groups of scrubbers 1 will fully remove impurities from the yellow phosphorus tail gas to avoid clogging of subsequent purification equipment;

[0036] Controlling to open the water ring vacuum pump 2, so that the water ring vacuum pump 2 introduces the yellow phosphorus tail gas into the four groups of first water washing towers 3, thereby starting to purify the yellow phosphorus tail gas, and removing pollutants from the yellow phosphorus tail gas through the first water washing tower 3, including toxic substances and heavy metals in the yellow phosphorus tail gas; thereby effectively reducing the biological load of water pollutants, and since the first water washing tower 3 is provided with three groups in series, the first water washing tower 3 can improve the effect of removing pollutants;

[0037] Then, the yellow phosphorus tail gas enters two parallel adsorption towers 4. Since the adsorption towers 4 are provided with activated carbon plates 14, the activated carbon plates 14 can adsorb and remove the elemental phosphorus and other mechanical impurities in the yellow phosphorus tail gas. The two groups of adsorption towers 4 are set up as one in operation and one in standby, which is beneficial to the treatment of the yellow phosphorus tail gas while maintaining the activated carbon plates 14 in the adsorption towers 4, thereby improving the treatment efficiency of the yellow phosphorus tail gas.

[0038] Embodiment 2: In this embodiment, if Figure 1-Figure 4 As shown, based on the first embodiment, a structure is also disclosed, and its specific contents are as follows;

[0039] An activated carbon plate 14 is fixedly installed on the upper inner side of the adsorption tower 4, and a cleaning rod 13 is contacted and connected to the lower surface of the activated carbon plate 14, and the cleaning rod 13 is rotatably arranged on the inner side of the adsorption tower 4; the cleaning rod 13 is arranged in a "T"-shaped structure when viewed from the front, and a second bevel gear 12 is fixedly installed on the outer side below the cleaning rod 13, and the upper end of the second bevel gear 12 is meshedly connected to the first bevel gear 11; a rotating rod 10 is fixedly installed on the right side of the first bevel gear 11, and the right end of the rotating rod 10 is arranged to penetrate the adsorption tower 4, and the right end of the rotating rod 10 is fixedly connected to a cam 9; two groups of cams 9 are arranged corresponding to the adsorption towers 4, and both groups of adsorption towers 4 are meshedly connected with threaded rods 6; the threaded rod 6 is rotatably arranged on the outer side of the adsorption tower 4, and the rear end of the threaded rod 6 is fixedly connected to the output shaft end of the driving motor 8;

[0040] When the adsorption tower 4 is adsorbing the yellow phosphorus tail gas, elemental phosphorus and other mechanical impurities will clog the lower surface of the activated carbon plate 14. At this time, the drive motor 8 can be controlled to be turned on, so that the output shaft end of the drive motor 8 drives the threaded rod 6 to rotate. Since the outer side of the threaded rod 6 is threadedly connected with two groups of cams 9, the threaded rod 6 will drive the two groups of cams 9 to rotate synchronously. The rotation of the cam 9 will drive the rotating rod 10 fixedly connected to its left end to rotate inside the adsorption tower 4. The rotation of the rotating rod 10 will drive the first bevel gear 11 to rotate. The rotation of the first bevel gear 11 will drive the second bevel gear 12 to rotate through the meshing connection. The rotation of the second bevel gear 12 will drive the cleaning rod 13 fixedly installed on its inner side to rotate inside the adsorption tower 4. Since the cleaning rod 13 is in contact with the lower surface of the activated carbon plate 14, and the cleaning rod 13 is viewed as a "T"-shaped structure in cross section, the rotation of the cleaning rod 13 will clean the lower surface of the activated carbon plate 14, thereby avoiding the blockage of the lower surface of the activated carbon plate 14, which is beneficial to improve the service life of the activated carbon plate 14.

[0041] Embodiment 3: In this embodiment, if Figure 1-Figure 6 As shown, based on the second embodiment, a structure is also disclosed, and its specific contents are as follows;

[0042] The right desulfurization tower 5 is connected to an exhaust pipe 15, and the exhaust pipe 15 can discharge a part of the tail gas as a heat source raw material;

[0043] Then the yellow phosphorus tail gas is passed into two desulfurization towers 5 connected in series, and the sulfide in the yellow phosphorus tail gas is removed by the desulfurization towers 5. The desulfurization towers 5 use a solution reagent prepared first, called a lean solution, for washing. The solution after washing and absorption is called a rich solution for regeneration. A part of the tail gas after the sulfide is removed is discharged through an exhaust pipe 15 as a heat source raw material, and a part is used as a raw material for the production of formate products. The tail gas as the formate product is then passed through three second water washing towers 16 connected in series and four alkali washing towers 7 connected in series. The alkali washing towers 7 further absorb the acidic gas in the washed tail gas by injecting caustic soda solution to ensure a higher carbon monoxide content in the tail gas, thereby ensuring the quality of the formate product.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A yellow phosphorus tail gas treatment device with high-efficiency purification function, comprising a scrubber (1), wherein the scrubber (1) is provided with five groups, and the five groups of scrubbers (1) are arranged in series, and the right scrubber (1) is connected to a water ring vacuum pump (2); It is characterized in that Also includes: The other end of the water ring vacuum pump (2) is connected to a first water washing tower (3), and the first water washing tower (3) is provided with three groups, and the three groups of first water washing towers (3) are arranged in series, and the first water washing tower (3) on the right side is connected to an adsorption tower (4); The adsorption tower (4) is provided with two groups, and the two groups of adsorption towers (4) are arranged in parallel, and the two groups of adsorption towers (4) are arranged with one in operation and the other in standby mode, and the right adsorption tower (4) is connected to a desulfurization tower (5); The desulfurization tower (5) is provided in two groups, and the two groups of desulfurization towers (5) are arranged in series, and the right desulfurization tower (5) is connected to the second water washing tower (16); The second water washing tower (16) is provided with three groups, and the three groups of second water washing towers (16) are arranged in series, and the second water washing tower (16) on the right side is connected to the alkali washing tower (7), and the alkali washing tower (7) is provided with four groups, and the four groups of alkali washing towers (7) are arranged in series, and the alkali washing tower (7) on the right side can discharge the treated tail gas.

2. The yellow phosphorus tail gas treatment equipment with high efficiency purification function according to claim 1 is characterized in that: The desulfurization tower (5) on the right is connected to an exhaust pipe (15), and the exhaust pipe (15) can discharge a portion of the tail gas as a heat source raw material.

3. The yellow phosphorus tail gas treatment equipment with high efficiency purification function according to claim 2 is characterized in that: An activated carbon plate (14) is fixedly mounted on the upper inner side of the adsorption tower (4), and a cleaning rod (13) is contacted and connected to the lower surface of the activated carbon plate (14), and the cleaning rod (13) is rotatably arranged on the inner side of the adsorption tower (4).

4. The yellow phosphorus tail gas treatment equipment with high efficiency purification function according to claim 3 is characterized in that: The cleaning rod (13) is arranged in a "T"-shaped structure when viewed from the front, and a second bevel gear (12) is fixedly mounted on the outer side below the cleaning rod (13), and the upper end of the second bevel gear (12) is meshingly connected with the first bevel gear (11).

5. The yellow phosphorus tail gas treatment equipment with high efficiency purification function according to claim 4 is characterized in that: A rotating rod (10) is fixedly mounted on the right side of the first bevel gear (11), and the right end of the rotating rod (10) is arranged to penetrate the adsorption tower (4), and the right end of the rotating rod (10) is fixedly connected to a cam (9).

6. The yellow phosphorus tail gas treatment equipment with high efficiency purification function according to claim 5 is characterized in that: The cams (9) are provided in two groups corresponding to the adsorption towers (4), and the two groups of adsorption towers (4) are meshedly connected with the threaded rods (6).

7. The yellow phosphorus tail gas treatment equipment with high efficiency purification function according to claim 6 is characterized in that: The threaded rod (6) is rotatably arranged outside the adsorption tower (4), and the rear end of the threaded rod (6) is fixedly connected to the end of the output shaft of the driving motor (8).

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