Device for detecting content of acidic components in sludge drying tail gas

Abstract

The utility model discloses a device for detecting the content of acidic components in sludge drying tail gas, which comprises a silicone tube, a water stop clamp, a long L-shaped glass tube, a short L-shaped glass tube, rubber plugs, absorption bottles, absorption liquid and an atmosphere sampler, the absorption liquid is filled in the two absorption bottles, and the rubber plugs for sealing are arranged at the tops of the two absorption bottles. A long L-shaped glass tube extending into the absorption liquid and a short L-shaped glass tube not extending into the absorption liquid are inserted into the two rubber plugs, the long L-shaped glass tube on the front-side absorption bottle is externally connected with gas to be detected through a silicone tube, and the short L-shaped glass tube on the front-side absorption bottle is communicated with the long L-shaped glass tube on the rear-side absorption bottle through a silicone tube. The short L-shaped glass tube on the absorption bottle on the rear side is communicated with an air sampler through a silicone tube; and a water stop clamp is mounted on each silicone tube. Through the mode, the device is suitable for detecting the content of acidic components in tail gas with any concentration and any proportion, and solves the influence caused by the change of sludge quality.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a device for detecting the content of acidic components in sludge drying tail gas. Background Technology

[0002] The exhaust gas produced during sludge drying has a strong odor, and direct discharge would cause serious environmental pollution. It needs to be treated before it can meet emission standards. However, the exhaust gas has a complex composition and contains large amounts of substances such as H2S, SO2, SO3, and NO. X The presence of acidic components and a large amount of moisture in exhaust gases can easily cause corrosion and damage to treatment equipment and facilities. To ensure their lifespan, exhaust gases need to be pretreated. The content of acidic components in exhaust gases is a necessary condition for designing pretreatment technology solutions.

[0003] Currently, the existing technology replaces the method of detecting the concentration of characteristic acidic substances H2S in the dried tail gas with the following drawbacks: the sludge quality is greatly affected by the quality of the treated water and the season, resulting in large fluctuations in the concentration and proportion of acidic components in the dried tail gas. Relying solely on detecting the concentration of H2S cannot accurately reflect the true content of acidic substances in the dried tail gas, which brings great uncertainty to the operation of the pretreatment system.

[0004] Traditional standard detection methods analyze single components in exhaust gas. On the one hand, there are many interfering factors that make accurate detection difficult. More importantly, the content of a single component is difficult to characterize the content of all acidic components in the exhaust gas. Therefore, it is essential to design a device and method for comprehensive detection of acidic components in dried exhaust gas. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a device for detecting the content of acidic components in sludge drying exhaust gas, which is suitable for detecting the content of acidic components in exhaust gas of any concentration and any proportion, and solves the problem caused by changes in sludge quality.

[0006] To solve the above-mentioned technical problems, the present invention provides a method for detecting the content of acidic components in sludge drying tail gas. This device includes a silicone tube, a water-stop clamp, a long L-shaped glass tube, a short L-shaped glass tube, a rubber stopper, an absorption bottle, an absorption liquid, and an atmospheric sampler. The two absorption bottles contain the absorption liquid, and each absorption bottle has a sealing rubber stopper on its top. A long L-shaped glass tube extending into the absorption liquid and a short glass tube not extending into the absorption liquid are inserted into the two rubber stoppers. The long L-shaped glass tube on the front absorption bottle receives the gas through the silicone tube. The short L-shaped glass tube on the front absorption bottle and the long L-shaped glass tube on the rear absorption bottle are connected through the silicone tube. The short L-shaped glass tube on the rear absorption bottle is connected to the atmospheric sampler through the silicone tube. A water-stop clamp is installed on each silicone tube.

[0007] Preferably, the silicone tube is tightly bonded to the connection points of the long and short L-shaped glass tubes, and the rubber stopper is tightly bonded to the connection points of the long and short L-shaped glass tubes.

[0008] Preferably, petroleum jelly is applied to the joint to ensure airtightness.

[0009] Preferably, the long L-shaped glass tube extends into the absorption bottle 5-10 mm from the bottom of the bottle, and the short L-shaped glass tube extends 10-20 mm from the bottom of the rubber stopper.

[0010] Preferably, the absorbent added to the absorption bottle is 200 mL, and the concentration can be adjusted to accommodate different concentrations of the detection gas.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] Method for detecting acidic components in sludge drying exhaust gas: Suitable for detecting acidic components in exhaust gas of any concentration and proportion, solving the problem caused by changes in sludge properties.

[0013] The effectiveness of the current test is monitored using acid-base indicators: the effectiveness of the results is monitored during the test by acid-base indicators, and it is also determined whether the concentration of the absorption liquid is insufficient.

[0014] Parallel testing verifies the validity of test results by comparing the relative deviations of the results: verifying the results through parallel testing ensures the reliability of the results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a device for detecting the content of acidic components in the exhaust gas from sludge drying.

[0016] Among them, 1. silicone tube, 2. water-stop clamp, 3. long L-shaped glass tube, 4. short L-shaped glass tube, 5. rubber stopper, 6. absorption bottle, 7. absorption liquid, and 8. atmospheric sampler. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0018] Please see Figure 1 The embodiments of this utility model include:

[0019] A device for detecting the acidic component content in sludge drying tail gas, comprising a silicone tube 1, a water-stop clamp 2, a long L-shaped glass tube 3, a short L-shaped glass tube 4, a rubber stopper 5, an absorption bottle 6, an absorption liquid 7, and an atmospheric sampler 8, such as... Figure 1 As shown.

[0020] Two absorption bottles 6 contain absorbent liquid 7. The top of each absorption bottle 6 is fitted with a sealing rubber stopper 5. A long L-shaped glass tube 3 that extends into the absorbent liquid 7 and a short L-shaped glass tube 4 that does not extend into the absorbent liquid 7 are inserted into the two rubber stoppers 5. The long L-shaped glass tube 3 on the front absorption bottle 6 receives the gas to be measured through a silicone tube 1. The short L-shaped glass tube 4 on the front absorption bottle 6 and the long L-shaped glass tube 3 on the rear absorption bottle 6 are connected through a silicone tube 1. The short L-shaped glass tube 4 on the rear absorption bottle 6 is connected to the atmospheric sampler 8 through a silicone tube 1. Each silicone tube 1 is fitted with a water-stopping clamp 2.

[0021] When assembling the testing device, attention should be paid to the tight connection of each component. Vaseline can be applied to the joints to ensure airtightness.

[0022] The long L-shaped glass tube 3 extends into the absorption bottle 6 5-10mm from the bottom of the bottle, and the short L-shaped glass tube 4 extends out of the bottom of the rubber stopper 5 10-20mm.

[0023] The absorbent liquid 7 added to the absorption bottle 6 should be 200 mL, and the concentration can be adjusted to accommodate different concentrations of the detection gas.

[0024] Before and after absorption, the water-stop clamp 2 should be kept closed to prevent the influence of outside air.

[0025] A method for detecting the acidic component content in sludge drying tail gas using a device includes the following steps:

[0026] S01: Pre-experiment preparation: Take two 500mL absorption bottles (6), add 200mL of 0.1% sodium hydroxide solution to each, and add 2-3 drops of phenolphthalein reagent to each bottle. Weigh the bottles separately (m1 and m2). Then strictly follow the instructions... Figure 1 The detection device is connected in a specific manner;

[0027] S02: Open the water stop clamp 2, turn on the atmospheric sampler 8 to take samples at a sampling rate of 1L / min and an absorption time of 60min. After absorption is complete, close the water stop clamp 2 to avoid contact with air. If phenolphthalein is found to fade during the absorption process, stop the experiment immediately, increase the concentration of sodium hydroxide solution and start again.

[0028] S03: Using titration, the absorbent in the absorption bottle is titrated with 1 mol / L dilute hydrochloric acid. The remaining amount of alkali in both absorption bottles 6 is determined, and the acid usage V1 and V2 (mL) is recorded. The difference between the initial and final alkali amounts in absorption bottle 6 is the amount of alkali consumed to neutralize the acidic components in the tail gas. Calculate the alkali consumption A1 and A2 for both stages and the acid content C (calculated as H2S).

[0029]

[0030] Where 40 is the molecular weight of sodium hydroxide, and 60 is the sampling volume.

[0031]

[0032] Where 34 is the molecular weight of H2S;

[0033] S04: Synchronous sampling, performing parallel testing according to steps S01 to S03, and the relative deviation X between the two test results C1 and C2.

[0034]

[0035] The results are considered reliable if the relative deviation X does not exceed 5%.

[0036] This invention relates to a device for detecting the acidic component content in sludge drying tail gas. It utilizes chemical solution absorption and designs a detection device and method to detect the acidic component content in sludge drying tail gas. Changes in the concentration and composition ratio of acidic components in the tail gas do not affect the representativeness and accuracy of the detection results. The detection results can intuitively guide the adjustment of tail gas treatment operation.

[0037] 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 description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for detecting the content of acidic components in sludge drying tail gas, characterized in that: The apparatus includes silicone tubing, a water-stop clamp, a long L-shaped glass tube, a short L-shaped glass tube, a rubber stopper, an absorption bottle, an absorption liquid, and an atmospheric sampler. Two absorption bottles contain the absorption liquid, and each bottle has a sealing rubber stopper at its top. A long L-shaped glass tube inserted into the absorption liquid and a short L-shaped glass tube not inserted into the absorption liquid are inserted into the two rubber stoppers. The long L-shaped glass tube on the front absorption bottle receives the gas to be measured through a silicone tubing. The short L-shaped glass tube on the front absorption bottle and the long L-shaped glass tube on the rear absorption bottle are connected through a silicone tubing. The short L-shaped glass tube on the rear absorption bottle is connected to the atmospheric sampler through a silicone tubing. Each silicone tubing is equipped with a water-stop clamp.

2. The device for detecting the content of acidic components in the tail gas of sludge drying according to claim 1, characterized in that: The silicone tube is tightly connected to the long and short L-shaped glass tubes, and the rubber stopper is tightly connected to the long and short L-shaped glass tubes.

3. The device for detecting the content of acidic components in the tail gas of sludge drying according to claim 2, characterized in that: Apply petroleum jelly to the joints to ensure airtightness.

4. The device for detecting the content of acidic components in the tail gas of sludge drying according to claim 1, characterized in that: The long L-shaped glass tube extends into the absorption bottle 5-10 mm from the bottom of the bottle, and the short L-shaped glass tube extends 10-20 mm from the bottom of the rubber stopper.

5. The device for detecting the content of acidic components in the tail gas of sludge drying according to claim 1, characterized in that: The absorption bottle contains 200 mL of absorption liquid, and the concentration can be adjusted to accommodate different concentrations of the detection gas.

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