Tail gas absorption device of protein digestion furnace

Abstract

The utility model belongs to the field of detection equipment. An exhaust port of an exhaust collector on a digestion furnace body is communicated with an exhaust absorption unit through an exhaust pipeline, the bottom of the exhaust pipeline of the exhaust absorption unit is inserted below the liquid level of a water absorption device, and the liquid level of the water absorption device is communicated below the liquid level of a sodium hydroxide solution absorption device through a gas communicating pipe. The sodium hydroxide solution absorption device is communicated with an exhaust pipe, a suction pump is arranged on the exhaust pipe, a sulfur dioxide detector and a waste discharge valve are installed at the front end and the rear end of the suction pump respectively, a bypass re-absorption pipe is arranged between the waste discharge valve and the suction pump, a gas return control valve is arranged on the re-absorption pipe, and the re-absorption pipe is communicated with a tail gas pipeline. The two-stage absorption device is arranged, the absorption effect is good, the reagent cost is low, tail gas subjected to two-stage absorption is detected through the sulfur dioxide detector, zero-pollution emission is truly achieved, the tail gas is subjected to closed continuous treatment from the exhaust gas collector to emission, the physical health of experimenters is guaranteed, and environmental pollution is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of detection equipment, especially relates to protein digestion furnace. BACKGROUND

[0002] Nitrogen determination instrument is the instrument for detecting the content of protein, and digestion furnace is indispensable product of the whole nitrogen determination instrument, and is mainly characterized by playing an important role in the digestion of sample, and the well type electric heating device is adopted in the digestion part, so that the sample obtains the best digestion effect and the shortest digestion time in the digestion tube. Harmful gases such as sulfur dioxide and carbon dioxide generated during digestion are discharged into the sewer through a water suction pump.

[0003] According to the national standard method, a certain quality sample is loaded in the digestion tube, a certain mass ratio of K2SO4+CuSO4 catalyst is added, and 20ml concentrated sulfuric acid is added in the digestion tube and heated. The concentrated sulfuric acid and the catalyst are heated with the sample to decompose the protein, and harmful gases such as SO2, CO2 and excess sulfuric acid mist overflow in the digestion tube during the heating process. Although tap water is opened throughout the operation process, and is discharged into the sewer through the gas pump. But still a small amount of excess or overflow SO 2、 Sulfuric acid mist and other harmful gases overflow, pollute the environment and harm the health of the experimenters.

[0004] At present, for this problem, domestic water or lye absorption is used for simple tail gas treatment, for example, Chinese patent CN 206531834 U discloses that waste gas generated by the reaction of the digestion furnace body enters the gas collection chamber, the gas pump 3 discharges the waste gas to the waste gas treatment device through the gas outlet pipeline, the toxic gas cover filters the waste gas, absorbs part of the sulfur dioxide contained in the waste gas, and the treated waste gas enters the water storage tank, the water storage tank filters the waste gas and absorbs the sulfur dioxide contained in the waste gas, and gives a waste gas pollution control scheme generated by the digestion furnace, but the treatment effect monitoring of sulfur dioxide in the waste gas still needs to be improved to ensure the waste gas treatment effect.

[0005] Chinese patent CN 204601974 U discloses a nitrogen digestion treatment device, which comprises: a digestion device for digesting nitrogen-containing substances to obtain ammonia and digestion tail gas; an alkali liquid storage tank connected with the digestion device; and a pump connected with the digestion device and the alkali liquid storage tank, the pump circulates the alkaline solution in the alkali liquid storage tank to absorb the digestion tail gas. A nitrogen digestion treatment device is given, which absorbs acidic waste gas by alkali to reduce the water consumption and the corrosion of acidic waste gas to the pipeline.

[0006] Although the above-mentioned effective solutions are proposed, the tail gas treatment degree is very important for the long-term detection staff, so it is necessary to carry out tail gas treatment with zero pollution as much as possible. UTILITY MODEL CONTENTS

[0007] The utility model discloses a tail gas absorption device of protein digestion furnace, and the system is closed to absorb excess and overflow harmful gas, simultaneously detects whether excess sulfur dioxide gas overflows, and tail gas is put forward after reaching the standard, which reduces the overflow of harmful gas to the environment to the maximum extent.

[0008] The utility model discloses a tail gas absorption device of protein digestion furnace relates to digestion furnace, and the digestion furnace main part has exhaust collector, and the exhaust port of exhaust collector is communicated with tail gas pipeline and is connected with tail gas absorption unit, and the tail gas absorption unit includes the closed water absorption device and sodium hydroxide solution absorption device who connects in proper order, and the bottom of tail gas pipeline is inserted into water absorption device liquid level, and the liquid level of water absorption device is inserted into one end of gas communication pipe, and the other end of gas communication pipe is inserted into sodium hydroxide solution absorption device liquid level, and the liquid level of sodium hydroxide solution absorption device is inserted into one end of exhaust pipe, and the exhaust pipe is installed with suction pump, and the front end of suction pump is installed with sulfur dioxide detector, and the rear end of suction pump is installed with exhaust valve, and the exhaust pipe between exhaust valve and suction pump is provided with bypass absorption pipe, and the absorption pipe is installed with back gas control valve, and the other end of absorption pipe is communicated with tail gas pipeline.

[0009] The back gas control valve and exhaust control valve are electric control valves, the sulfur dioxide detector signal is connected with the electric control cabinet, and the electric control cabinet signal drives the electric control valve.

[0010] The water absorption device is installed with water inlet valve on the water inlet pipe, and is installed with drainage valve on the drain pipe, the sodium hydroxide solution absorption device is installed with liquid inlet valve on the liquid inlet pipe, and is installed with liquid outlet valve on the liquid outlet pipe, the concentration meter signal is connected with the electric control cabinet, the electric control cabinet receives the signal and drives the drainage valve and water inlet valve, the acid-base tester signal is connected with the electric control cabinet, and the electric control cabinet receives the signal and drives the liquid inlet valve and liquid outlet valve.

[0011] Compared with similar products, the utility model has notable advantages, and the secondary absorption device is arranged between the exhaust collector and the suction pump on the digestion furnace, the water absorption device and the sodium hydroxide solution absorption device are connected in series, the overflow or excess SO2 and CO2 and other harmful gas in the digestion furnace are absorbed, the water absorption device is in front of the sodium hydroxide solution absorption device, not only absorption effect is good, and reagent cost is low, and the tail gas after two-stage absorption is detected through the sulfur dioxide detector, when not reaching the dischargeable standard value, can return to the water absorption device through the valve control, and is absorbed again, when reaching the dischargeable standard value, is directly discharged through the exhaust control valve, realizes zero pollution discharge, and the tail gas is closed and continuous processing from the exhaust collector to the discharge, not only guarantees the health of the experimental personnel, but also reduces environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the utility model.

[0013] In the figure: 1 digestion furnace;2 exhaust gas collector;3 tail gas pipeline;4 water absorption device;5 sodium hydroxide solution absorption device;6 water inlet valve;7 drain valve;8 gas communication pipe;9 liquid inlet valve;10 liquid outlet valve;11 exhaust pipe;12 sulfur dioxide detector;13 suction pump;14 waste discharge valve;15 gas return control valve;16 reabsorption pipe. DETAILED DESCRIPTION

[0014] The utility model will be further explained in detail in connection with the drawings, but the utility model is not limited to specific embodiments. EMBODIMENT

[0015] As Figure 1 The exhaust gas absorption device of a protein digestion furnace shown in the figure, the digestion furnace 1 main body has exhaust gas collector 2, and the exhaust port of the exhaust gas collector is communicated with the exhaust gas absorption unit through the tail gas pipeline 3, the exhaust gas absorption unit includes the water absorption device 4 and the sodium hydroxide solution absorption device 5 connected in sequence, the tail gas pipeline bottom is inserted into the water absorption device liquid level, the water absorption device liquid level is inserted into one end of the gas communication pipe 8, the other end of the gas communication pipe 8 is inserted into the sodium hydroxide solution absorption device liquid level, the sodium hydroxide solution absorption device liquid level is inserted into one end of the exhaust pipe 11, and the suction pump 13 is installed on the exhaust pipe, the sulfur dioxide detector 12 is installed at the front end of the suction pump, and the waste discharge valve 14 is installed at the rear end of the suction pump, the exhaust pipe between the waste discharge valve and the suction pump is provided with bypass reabsorption pipe 16, the gas return control valve 15 is installed on the reabsorption pipe, the other end of the reabsorption pipe is communicated with the tail gas pipeline, the gas return control valve and the exhaust control valve are electric control valves, the sulfur dioxide too strong detector signal is connected with the electric control cabinet, and the electric control cabinet signal drives the electric control valve.

[0016] The water absorption device is provided with a concentration meter, the water inlet valve 6 is installed on the water inlet pipe of the water absorption device, the drain valve 7 is installed on the drain pipe, the acid-base tester is installed in the sodium hydroxide solution absorption device, the liquid inlet valve 9 is installed on the liquid inlet pipe of the sodium hydroxide solution absorption device, the liquid outlet valve 10 is installed on the liquid outlet pipe, the concentration meter signal is connected with the electric control cabinet, the electric control cabinet receives the signal and drives the drain valve and the water inlet valve, the water absorption device is automatically watered and drained after adsorption saturation, the acid-base tester detection signal is connected with the electric control cabinet, the electric control cabinet receives the signal and drives the liquid inlet valve and the liquid outlet valve, the sodium hydroxide solution absorption device is automatically liquid-changed after adsorption saturation, ensures continuous online detection without stopping, and manual liquid change is not required.

[0017] Work, in the digestion furnace body on the exhaust collector exhaust port and suction pump between the first and a water absorption device and sodium hydroxide solution absorption device, closed two adsorption, absorption of excess and spillage of harmful gases, while the exhaust pipe after the sodium hydroxide solution absorption device increases AP-G-SO2-2 fixed sulfur dioxide detector, detect the sulfur dioxide content in the exhaust gas, whether to reach the normal emission standards, if the standard, can be through the exhaust pipe, if not up to standard, can be through the absorption tube again into the water absorption device and sodium hydroxide solution absorption device processing, emission after reaching the standard.

Claims

1. A tail gas absorption device for a protein digestion furnace, which relates to a digestion furnace, characterized by, The main body of the digestion furnace has an exhaust collector, an exhaust outlet of the exhaust collector is connected with a tail gas absorption unit through a tail gas pipeline, the tail gas absorption unit comprises a closed water absorption device and a sodium hydroxide solution absorption device connected in sequence, the tail gas pipeline is inserted into the water absorption device below the liquid level, a gas communication pipe is inserted into the water absorption device above the liquid level, the gas communication pipe is inserted into the sodium hydroxide solution absorption device below the liquid level, an exhaust pipe is inserted into the sodium hydroxide solution absorption device above the liquid level, a suction pump is installed on the exhaust pipe, a sulfur dioxide detector is installed in front of the suction pump, a waste discharge valve is installed at the rear end of the suction pump, a bypass absorption pipe is arranged between the waste discharge valve and the suction pump, a gas return control valve is installed on the bypass absorption pipe, and the other end of the bypass absorption pipe is connected with the tail gas pipeline.

2. The exhaust gas absorption device of a protein digestion furnace according to claim 1, characterized in that, The gas return control valve and the exhaust control valve are electric control valves, a sulfur dioxide detector signal is connected with an electric control cabinet, and the electric control cabinet drives the electric control valves.

3. The exhaust gas absorption device of a protein digestion furnace according to claim 1, characterized in that, A concentration meter is arranged in the water absorption device, a water inlet valve is arranged on a water inlet pipe of the water absorption device, a water outlet valve is arranged on a water outlet pipe, an acid-base tester is arranged in the sodium hydroxide solution absorption device, a liquid inlet valve is arranged on a liquid inlet pipe of the sodium hydroxide solution absorption device, and a liquid outlet valve is arranged on a liquid outlet pipe, a concentration meter signal is connected with the electric control cabinet, the electric control cabinet receives signals to drive the water inlet valve and the water outlet valve, and an acid-base tester signal is connected with the electric control cabinet, the electric control cabinet receives signals to drive the liquid inlet valve and the liquid outlet valve.

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