Combined gas washing, absorbing and purifying double towers for hexavalent chromium ion-containing gas

Abstract

The utility model provides a combined gas washing, absorbing and purifying double tower for hexavalent chromium ion-containing gas. The combined gas washing, absorbing and purifying double tower for the hexavalent chromium ion-containing gas comprises a supporting table, and the top of the supporting table is fixedly connected with an absorbing tower. According to the combined gas washing, absorbing and purifying twin tower for the hexavalent chromium ion-containing gas, provided by the utility model, the scrubber tower is arranged, high-temperature clinker is put into the wet mill when the incineration of chromium raw ore is finished, so that the high-temperature clinker is ground by the wet mill, and the hexavalent chromium ion-containing mixed gas which is continuously generated at the moment is conveyed into the scrubber tower; the mixed gas containing the hexavalent chromium ions is discharged into the absorption tower after being treated by the first spray pipe, the gas riser and the cyclone, so that the hexavalent chromium ions are reduced into trivalent chromium ions by the reducing agent, and the effect of purifying the mixed gas containing the hexavalent chromium ions is achieved; therefore, the problem that the air pollutes the environment when the hexavalent chromium ion-containing mixed gas is directly leaked into the air is avoided.

Description

Technical Field

[0001] This utility model relates to the field of combined gas scrubbing absorption and purification, and in particular to a dual-tower combined gas scrubbing absorption and purification system for gases containing hexavalent chromium ions. Background Technology

[0002] Chromium salts are one of the major inorganic chemical products in my country, widely used in metallurgy, leather making, pigments, dyes, fragrances, metal surface treatment, wood preservation, and military industries. They are listed as one of the eight most competitive resource-based raw materials. However, hexavalent chromium is often produced during chromium salt production. Hexavalent chromium is easily absorbed by the human body and can enter the body through the digestive tract, respiratory tract, skin, and mucous membranes, causing various harms and reactions, such as skin irritation, tissue cell damage, digestive or respiratory system damage, stunted bone growth, liver and kidney toxicity, and may cause hereditary genetic defects. It also poses a persistent environmental hazard. More seriously, long-term or short-term exposure or inhalation of excessive amounts can be life-threatening. However, these are characteristics of hexavalent chromium; metallic chromium, trivalent, or tetravalent chromium do not possess these toxicities.

[0003] Currently, the domestic production process mainly involves burning chromium ore in a rotary kiln and then immersing it in tank cars. However, the clinker temperature is as high as 700 to 800 degrees Celsius, and hexavalent chromium gas continuously overflows and drifts everywhere, polluting the environment, threatening workers' health, and wasting raw materials.

[0004] Therefore, it is necessary to provide a combined gas scrubbing and absorption purification dual-tower system for gases containing hexavalent chromium ions to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a combined gas washing and absorption purification dual-tower system for gases containing hexavalent chromium ions, which solves the problem of hexavalent chromium gas overflowing and drifting everywhere, polluting the environment, threatening workers' health, and wasting raw materials.

[0006] To solve the above-mentioned technical problems, this utility model provides a combined gas scrubbing and absorption purification dual-tower system for hexavalent chromium ion-containing gas, comprising a support platform, an absorption tower fixedly connected to the top of the support platform, a gas scrubbing tower fixedly connected to the top of the support platform, a wet mill fixedly installed on one side of the top of the support platform, a first-stage packing hood fixedly fitted inside the gas scrubbing tower, a demister wire mesh fixedly fitted inside the gas scrubbing tower, a second-stage packing hood fixedly fitted inside the absorption tower, a gas lift device fixedly fitted inside the gas scrubbing tower, a cyclone separator fixedly fitted inside the gas scrubbing tower, a spray mechanism provided on the top of the support platform, an inspection port provided on the side of the gas scrubbing tower, an exhaust fan mechanism provided on the top of the support platform, and a first-stage spray pipe fixedly fitted inside the gas scrubbing tower.

[0007] Preferably, the height of the gas scrubbing tower is greater than the height of the absorption tower, and the gas scrubbing tower is made of stainless steel.

[0008] Preferably, the demister mesh is located directly above the second packing hood, and the demister mesh and the second packing hood are parallel to each other.

[0009] Preferably, there are several air lifters, which are evenly distributed above the cyclone separator.

[0010] Preferably, there are two hydrocyclones, and the two hydrocyclones are symmetrically distributed with the first spray pipe as the axis of symmetry.

[0011] Preferably, the spraying mechanism includes a delivery pump, which is fixedly installed on the top of the support platform. A second spray pipe is fixedly sleeved on the top of the delivery pump, and a delivery pipe is fixedly sleeved on the side of the delivery pump. One end of the delivery pipe is fixedly sleeved inside the absorption tower.

[0012] Preferably, the air intake mechanism includes an exhaust pipe, which is fixedly sleeved on the top of the absorption tower. A rotary motor is fixedly installed on the top of the support platform, and a fan blade is fixedly sleeved on the output shaft of the rotary motor. A conveyor box is fixedly sleeved on the top of the support platform, and an exhaust pipe is fixedly sleeved on the top of the conveyor box.

[0013] Compared with related technologies, the combined gas washing and absorption purification dual-tower system for hexavalent chromium ion-containing gases provided by this utility model has the following beneficial effects:

[0014] This invention provides a combined gas scrubbing and absorption purification tower for gases containing hexavalent chromium ions. By setting up a gas scrubbing tower, when the incineration of chromium ore is completed, high-temperature clinker is fed into the interior of a wet mill. At this time, the wet mill is started, and the grinding of the high-temperature clinker by the wet mill continuously generates a mixed gas containing hexavalent chromium ions, which is then transported into the interior of the gas scrubbing tower. The mixed gas containing hexavalent chromium ions inside the gas scrubbing tower is then treated by a first spray pipe, a gas lifter, and a cyclone separator before being discharged into the absorption tower. This allows the reducing agent to reduce the hexavalent chromium ions to trivalent chromium ions, thereby achieving the purification effect of the mixed gas containing hexavalent chromium ions. This avoids the problem of air pollution caused by the direct leakage of the mixed gas containing hexavalent chromium ions into the air, thus improving the cleanliness of the chromium ore incineration process.

[0015] By setting up a spraying mechanism, when the mixed gas is being purified again, the delivery pump is started, allowing the delivery pump to absorb the reducing agent water flow through the delivery pipe, and then spray it into the absorption tower through the No. 2 spray pipe, thereby achieving the effect of recycling the reducing agent and improving the conservation of raw materials. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of the combined gas scrubbing absorption and purification dual-tower system for gas containing hexavalent chromium ions provided by this utility model;

[0017] Figure 2 for Figure 1 The image shows a front view of the No. 1 packing hood in a dual-tower combined gas scrubbing and absorption purification system for gas containing hexavalent chromium ions.

[0018] Figure 3 for Figure 1 The image shows a front view of a dual-tower combined gas scrubbing and absorption purification system for a gas containing hexavalent chromium ions.

[0019] Figure 4 for Figure 1 The image shows a front view of the induced draft mechanism in a dual-tower combined gas scrubbing and absorption purification system for gases containing hexavalent chromium ions.

[0020] Numbered in the diagram: 1. Support platform; 2. Absorption tower; 3. Scrubber; 4. Wet mill; 5. No. 1 packing hood; 6. Defoaming mesh; 7. No. 2 packing hood; 8. Air lifter; 9. Cyclone separator; 10. Spraying mechanism; 101. Conveyor pump; 102. No. 2 spray pipe; 103. Conveyor pipe; 11. Inspection port; 12. Exhaust fan mechanism; 121. Exhaust pipe; 122. Rotary motor; 123. Fan blade; 124. Conveyor box; 125. Exhaust stack; 13. No. 1 spray pipe. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic diagram of a preferred embodiment of the combined gas scrubbing absorption and purification dual-tower system for gas containing hexavalent chromium ions provided by this utility model; Figure 2 for Figure 1 The image shows a front view of the No. 1 packing hood in a dual-tower combined gas scrubbing and absorption purification system for gas containing hexavalent chromium ions. Figure 3 for Figure 1 The image shows a front view of a dual-tower combined gas scrubbing and absorption purification system for a gas containing hexavalent chromium ions. Figure 4 for Figure 1The diagram shows a front view of the induced draft mechanism in a combined gas scrubbing and absorption purification tower for hexavalent chromium ion gas. The combined gas scrubbing and absorption purification tower for hexavalent chromium ion gas includes a support platform 1, an absorption tower 2 fixedly connected to the top of the support platform 1, a scrubbing tower 3 fixedly connected to the top of the support platform 1, a wet mill 4 fixedly installed on one side of the top of the support platform 1, a first-order packing hood 5 fixedly fitted inside the scrubbing tower 3, a demister mesh 6 fixedly fitted inside the scrubbing tower 3, a second-order packing hood 7 fixedly fitted inside the absorption tower 2, a riser 8 fixedly fitted inside the scrubbing tower 3, a cyclone separator 9 fixedly fitted inside the scrubbing tower 3, a spray mechanism 10 installed on the top of the support platform 1, an inspection port 11 on the side of the scrubbing tower 3, an induced draft mechanism 12 installed on the top of the support platform 1, and a first-order spray pipe 13 fixedly fitted inside the scrubbing tower 3.

[0023] The height of the scrubbing tower 3 is greater than that of the absorption tower 2, and the scrubbing tower 3 is made of stainless steel. By setting up the scrubbing tower 3, when the chromium ore incineration is finished, the high-temperature clinker is fed into the wet mill 4. At this time, the wet mill 4 is started, so that when the wet mill 4 grinds the high-temperature clinker, it continuously generates a mixed gas containing hexavalent chromium ions, which is then transported into the scrubbing tower 3. The mixed gas containing hexavalent chromium ions inside the scrubbing tower 3 is then discharged into the absorption tower 2 after being treated by the No. 1 spray pipe 13, the air lifter 8, and the cyclone separator 9. The mixed gas is then treated again by the absorption tower 2 and discharged into the air, thereby achieving the purification effect of the mixed gas containing hexavalent chromium ions. This avoids the problem of air pollution caused by the direct leakage of the mixed gas containing hexavalent chromium ions into the air, thus improving the cleanliness of the chromium ore incineration process.

[0024] The demister mesh 6 is located directly above the second packing hood 7, and the demister mesh 6 and the second packing hood 7 are parallel to each other. By setting the demister mesh 6, when the treated gas mixture containing hexavalent chromium ions is transported, the demister mesh 6 can break the foam that surrounds the gas, thus avoiding the problem of poor gas purification effect when the gas mixture is transported with foam.

[0025] There are several air lifters 8, which are evenly distributed above the cyclone separator 9. By setting up air lifters 8, when the mixed gas is being purified, the air lifters 8 can disperse and evenly distribute the mixed gas, thereby improving the uniformity of the mixed gas and the reducing agent water flow when they are mixed.

[0026] There are two hydrocyclones 9, which are symmetrically distributed about the first spray pipe 13. By setting up the hydrocyclones 9, when the mixed gas is transported, the hydrocyclones 9 are activated, which drives the mixed water vapor to rotate rapidly. When the airflow rotates, the water flow rotates to the inner wall of the gas scrubbing tower 3 and then falls off, thereby achieving the separation effect of water flow and air flow.

[0027] The spraying mechanism 10 includes a delivery pump 101, which is fixedly installed on the top of the support platform 1. A second spray pipe 102 is fixedly sleeved on the top of the delivery pump 101, and a delivery pipe 103 is fixedly sleeved on the side of the delivery pump 101. One end of the delivery pipe 103 is fixedly sleeved inside the absorption tower 2. By setting up the spraying mechanism 10, when the mixed gas is being purified again, the delivery pump 101 is started, so that the delivery pump 101 can absorb the reducing agent water flow through the delivery pipe 103, and then spray it into the absorption tower 2 through the second spray pipe 102, thereby achieving the effect of recycling the reducing agent, that is, improving the conservation of raw materials.

[0028] The induced draft mechanism 12 includes an exhaust pipe 121, which is fixedly sleeved on the top of the absorption tower 2. A rotary motor 122 is fixedly installed on the top of the support platform 1. A fan blade 123 is fixedly sleeved on the output shaft of the rotary motor 122. A conveying box 124 is fixedly sleeved on the top of the support platform 1. An exhaust pipe 125 is fixedly sleeved on the top of the conveying box 124. By setting the induced draft mechanism 12, when the purification of the mixed gas is finished, the rotary motor 122 is started, so that the rotary motor 122 drives the fan blade 123 to rotate rapidly, that is, to absorb the mixed gas and then discharge it through the exhaust pipe 125, thereby improving the emission speed of the mixed gas.

[0029] The working principle of the combined gas scrubbing and absorption purification dual-tower system for gases containing hexavalent chromium ions provided by this invention is as follows:

[0030] Step 1: First, after the chromium ore incineration is completed, the high-temperature clinker is fed into the wet mill 4. The wet mill 4 is then started, and as it grinds the high-temperature clinker, it continuously generates a mixed gas containing hexavalent chromium ions, which is then transported to the scrubbing tower 3. This mixed gas, containing hexavalent chromium ions, is then processed by the first spray pipe 13, the riser 8, and the cyclone separator 9 before being discharged into the absorption tower 2. The mixed gas is then further processed by the absorption tower 2 before being released into the air, thus achieving the purification effect of the mixed gas containing hexavalent chromium ions. This avoids the problem of air pollution caused by the direct leakage of mixed gas containing hexavalent chromium ions into the air, thereby improving the cleanliness of chromium ore incineration processing. When the treated mixed gas containing hexavalent chromium ions is transported, the defoaming wire mesh 6 can break up the foam surrounding the gas, thus avoiding the problem of poor purification effect of mixed gas when transported with foam. When the mixed gas is purified, the gas lifter 8 can disperse and evenly distribute the mixed gas, thereby improving the uniformity of the mixture when the mixed gas is mixed with the reducing agent water flow.

[0031] Step 2: When the mixed gas is being transported, the hydrocyclone 9 is started, causing the mixed water vapor to rotate rapidly. As the airflow rotates, the water flow rotates to the inner wall of the scrubbing tower 3 and falls down, thus achieving the separation of water and air. When the mixed gas is being purified again, the delivery pump 101 is started, allowing the delivery pump 101 to absorb the reducing agent water flow through the delivery pipe 103, and then spray it into the absorption tower 2 through the second spray pipe 102, thus achieving the effect of recycling the reducing agent and improving the conservation of raw materials. When the mixed gas purification is finished, the rotary motor 122 is started, causing the rotary motor 122 to drive the fan blade 123 to rotate rapidly, thus absorbing the mixed gas and then venting it through the exhaust pipe 125, thereby increasing the emission speed of the mixed gas.

[0032] Compared with related technologies, the combined gas washing and absorption purification dual-tower system for hexavalent chromium ion-containing gases provided by this utility model has the following beneficial effects:

[0033] By setting up a scrubbing tower 3, when the chromium ore incineration ends, the high-temperature clinker is fed into the wet mill 4. At this time, the wet mill 4 is started, so that when the wet mill 4 grinds the high-temperature clinker, it continuously generates a mixed gas containing hexavalent chromium ions, which is then transported into the scrubbing tower 3. The mixed gas containing hexavalent chromium ions inside the scrubbing tower 3 is then discharged into the absorption tower 2 after being treated by the No. 1 spray pipe 13, the air lifter 8, and the cyclone separator 9. The mixed gas is then treated again by the absorption tower 2 and discharged into the air, thereby achieving the purification effect of the mixed gas containing hexavalent chromium ions. This avoids the problem of air pollution caused by the direct leakage of the mixed gas containing hexavalent chromium ions into the air, thus improving the cleanliness of the chromium ore incineration process.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. Combined gas washing and absorption purification double column containing hexavalent chromium ion gas, comprising a support table (1), characterized in that: The top of the support table (1) is fixedly connected with an absorption tower (2), the top of the support table (1) is fixedly connected with a gas washing tower (3), one side of the top of the support table (1) is fixedly installed with a wet grinding machine (4), the inside of the gas washing tower (3) is fixedly sleeved with a first filler cover (5), the inside of the gas washing tower (3) is fixedly sleeved with a defoaming wire mesh (6), the inside of the absorption tower (2) is fixedly sleeved with a second filler cover (7), the inside of the gas washing tower (3) is fixedly sleeved with a gas riser (8), the inside of the gas washing tower (3) is fixedly sleeved with a cyclone (9), the top of the support table (1) is provided with a spraying mechanism (10), the side of the gas washing tower (3) is provided with an access hole (11), the top of the support table (1) is provided with an air induction mechanism (12), and the inside of the gas washing tower (3) is fixedly sleeved with a first spraying pipe (13).

2. The combined gas washing and absorption purification double column containing hexavalent chromium ion gas according to claim 1, characterized in that, The height value of the gas washing tower (3) is greater than that of the absorption tower (2), and the material of the gas washing tower (3) is stainless steel material.

3. The combined gas washing and absorption purification double column containing hexavalent chromium ion gas according to claim 1, characterized in that, The defoaming wire mesh (6) is located directly above the second filler cover (7), and the defoaming wire mesh (6) and the second filler cover (7) are parallel to each other.

4. The combined gas washing and absorption purification double column containing hexavalent chromium ion gas according to claim 1, characterized in that, The number of the gas risers (8) is several, and the several gas risers (8) are uniformly distributed above the cyclone (9).

5. The combined gas washing and absorption purification double column containing hexavalent chromium ion gas according to claim 1, characterized in that, The number of the cyclones (9) is two, and the two cyclones (9) are symmetrically distributed with the first spraying pipe (13) as the symmetric axis.

6. The combined gas washing and absorption purification double column containing hexavalent chromium ion gas according to claim 1, characterized in that, The spraying mechanism (10) comprises a conveying pump (101), the conveying pump (101) is fixedly installed on the top of the support table (1), the top of the conveying pump (101) is fixedly sleeved with a second spraying pipe (102), the side of the conveying pump (101) is fixedly sleeved with a conveying pipe (103), and one end of the conveying pipe (103) is fixedly sleeved in the inside of the absorption tower (2).

7. The combined gas washing and absorption purification double column containing hexavalent chromium ion gas according to claim 1, characterized in that, The air induction mechanism (12) comprises an exhaust pipe (121), the exhaust pipe (121) is fixedly sleeved on the top of the absorption tower (2), the top of the support table (1) is fixedly installed with a rotary motor (122), the output shaft of the rotary motor (122) is fixedly sleeved with a fan blade (123), the top of the support table (1) is fixedly sleeved with a conveying box (124), and the top of the conveying box (124) is fixedly sleeved with an exhaust cylinder (125).

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