Coking ammonium sulfate acid tar separation device

Abstract

The utility model discloses a coking ammonium sulfate acid tar separation device, and belongs to the field of coke oven gas purification. The device comprises a separation tank, a feeding hole is formed in the middle of a tank body of the separation tank, upper, middle and lower layers of liquid outlets are respectively formed in the side surfaces of the tank body, the upper layer of liquid outlet is used for discharging acid tar, the middle layer of liquid outlet is used for discharging mother liquor, and the lower layer of liquid outlet is used for discharging tar sediment; a middle-section full-flow pipe is arranged in the tank body, a jacket type heater is arranged at the middle lower part of the tank body, and a top plate of the tank body is respectively connected with a liquid level meter, a tail gas leading-out pipe and an observation hole. According to the utility model, through the design of three layers of liquid drainage and the full flow pipe in the middle section, the effective separation of acid tar, mother liquor and tar sediment and the recycling of the mother liquor are ensured; the problems that the manual operation environment is severe, and the full-flow groove is inconvenient to clean and not environmentally friendly are solved.

Description

Technical Field

[0001] The utility model relates to a coking ammonium sulfate tar separation device, belonging to the field of coke oven gas purification. Background Art

[0002] Existing coking plants use a saturator to produce ammonium sulfate to recover ammonia from coal gas. In this process, a portion of the mother liquor from the saturator flows through a full-flow trough and is then pumped back into the coal gas in the saturator's spray chamber by a small mother liquor pump. Acid tar floats on the surface of the mother liquor in the full-flow trough and needs to be manually removed. This acid tar, mostly mother liquor, also contains significant amounts of coal dust, coke dust, and a small amount of tar. Its composition is complex and highly corrosive. Furthermore, a certain amount of powdery solids accumulates at the bottom of the full-flow trough, making it difficult to handle. Furthermore, some odorous tail gas may escape from the surface of the acid tar.

[0003] A problem with the existing technology is that the acid tar in the full flow trough of the ammonium sulfate saturator generally separates into three layers after standing: acid tar at the top, mother liquor in the middle, and a slurry-like sediment containing suspended solids such as coal dust and coke at the bottom, accounting for approximately 3-10% by volume, 85-95% by volume, and 5-10% by volume, respectively. Most manufacturers manually remove the tar from the trough once it is full, dumping it directly into the coal yard or onto a conveyor belt for coal blending. This treatment method creates a very harsh on-site operating environment. During the scavenging operation, large amounts of exhaust gas, especially toxic coal gas, escape, posing a health risk to operators and potentially causing poisoning. Furthermore, during this treatment process, the sediment containing coke and coal dust at the bottom sometimes becomes hardened and agglomerated due to long-term storage, accumulating at the bottom of the trough or adhering to the trough walls, making it difficult to remove. Furthermore, even though the trough is sealed during operation, some exhaust gas still escapes, polluting the air and failing to meet environmental standards. Utility Model Content

[0004] In order to overcome the problems of the above-mentioned prior art in the harsh manual operation environment, inconvenient cleaning of the full flow tank, and environmental pollution, the utility model provides a coking ammonium sulfate tar separation device to replace the original saturator full flow tank.

[0005] The technical solution adopted in this utility model is:

[0006] A coking ammonium sulfate acid tar separation device comprises a separation tank, a feed port is arranged in the middle of the separation tank body, and three layers of drainage ports are respectively provided on the side of the tank body, the upper drainage port is used to discharge acid tar, the middle drainage port is used to discharge mother liquor, and the lower drainage port is used to discharge tar sediment;

[0007] A middle full flow pipe is provided in the tank body, which is a 90° elbow pipe. The bottom of the pipe is inserted below the acid tar liquid level in the tank body, and the top outlet is set above the three-layer drainage port.

[0008] The bottom of the middle full flow pipe is connected to the inner wall of the separation tank through a short pipe.

[0009] A jacketed heater is provided in the middle and lower part of the tank body, and the top plate of the tank body is connected to a liquid level gauge, an exhaust gas outlet pipe and an observation hole respectively.

[0010] The device is equipped with a remote liquid level gauge, an automatic liquid inlet regulating valve (which automatically controls the valve opening according to the liquid level), a transparent quick connector, etc.

[0011] The feed port is a 45° inverted structure to avoid blockage of the feed port.

[0012] The three-layer drainage system on the side of the tank effectively separates the tar, mother liquor, and tar sediment in the acid tar according to the different densities. The drainage pipes connecting the tank and the three-layer drainage outlet use transparent quick connectors, allowing for continuous monitoring of the drainage separation process and facilitating maintenance and disassembly.

[0013] The liquid level gauge is an internal float type liquid level gauge installed on the top of the tank body. It can remotely monitor and control the liquid level of the separation tank in real time and is interlocked with the automatic liquid inlet regulating valve to achieve effective control of the liquid level of the separation tank. The automatic liquid inlet regulating valve is installed at the feed inlet.

[0014] A jacketed heater installed at the bottom of the tank accelerates the stratification of the acid tar. The heating and insulation jacket uses electric heating or hot water to keep the heating temperature below 75°C. Heat inlet and outlet are located at the top and bottom of the heater.

[0015] An exhaust gas outlet pipe is provided on the upper part of the tank body, and a quick interface is provided with the exhaust gas treatment device of the original system to prevent the exhaust gas from escaping during use.

[0016] The utility model realizes the separate discharge of each phase of the statically layered medium and achieves effective separation by setting up three layers of liquid discharge pipes. The upper acid tar discharge port separates and extracts the acid tar. The middle mother liquor discharge port returns the mother liquor in the acid tar after stratification in the tank body to the system, recycling the mother liquor while reducing the amount of acid tar. The bottom sediment discharge port discharges heavy impurities with higher density. An internal float-type remote level gauge is installed on the top of the device to realize remote monitoring of the liquid level in the tank. The level gauge is interlocked with the feed port control valve to accurately control the liquid level in the tank. The device is provided with a jacketed heater, which can better promote the stratification of the acid tar in the tank and better separate the acid tar. In order to prevent the coal powder and coke powder part of the bottom of the tank body from hardening, a heating jacket is set in the lower middle part of the tank body. In order to avoid the mother liquor temperature being too high and causing corrosion to the tank body, the jacketed heater used adopts electric insulation or hot water insulation to accurately control the heating temperature.

[0017] The coking ammonium sulfate tar separation device provided by the utility model has the following beneficial effects:

[0018] (1) The feed port is inverted at 45° and equipped with a quick connector to avoid feed blockage and facilitate maintenance;

[0019] (2) The design of three-layer drainage and middle-section full-flow pipe ensures the effective separation of acid tar, mother liquor, and tar sediment and the recycling of mother liquor;

[0020] (3) By installing a remote liquid level meter, the liquid level in the separation tank can be effectively controlled to ensure separation effect and production safety, thus achieving automation;

[0021] (4) By installing a jacketed heater on the tank body, it is more conducive to the stratification of acid tar inside the tank body;

[0022] (5) By setting up a mid-section full flow pipe, the mother liquor after the acid tar is stratified can be discharged under the full flow state, thus reducing the amount of acid tar entering the production system;

[0023] (6) Through the easily detachable transparent quick connector, the acid tar production situation can be effectively observed;

[0024] (7) Electric heating or hot water heating can better control the heating temperature and avoid the situation where the steam heating has a high local temperature control;

[0025] (8) By setting up exhaust gas collection pipelines, exhaust gas can be recovered in an organized manner to avoid escape and improve the on-site environment.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of the coking ammonium sulfate tar separation device in Example 1 of the present utility model.

[0028] In the figure: 1. Feed inlet; 2. Three-layer drain port; 3. Liquid level gauge; 4. Exhaust gas outlet pipe; 5. Jacketed heater; 6. Transparent quick connector; 7. Middle section full flow pipe; 8. Manhole; 9. Observation hole; 10. Heat source outlet; 11. Heat source inlet. DETAILED DESCRIPTION

[0029] In order to enable people skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1

[0030] like Figure 1 As shown, a coking ammonium sulfate tar separation device, the device body is a separation tank, used to replace the full flow tank in the prior art;

[0031] A feed port 1 is provided in the middle of the separation tank body, and three drainage ports 2 are provided on the side of the tank body, namely, the upper drainage port is used to discharge acid tar, the middle drainage port is used to discharge mother liquor, and the lower drainage port is used to discharge tar sediment.

[0032] The tank is equipped with a mid-flow pipe 7, a 90-degree bend. Its bottom is inserted below the acid tar liquid level in the tank, and its top outlet is located above the three-layer drain port. The bottom of the mid-flow pipe is connected to the inner wall of the separation tank via a short pipe. When the tank liquid level is high and the flow is full, the middle layer of the acid tar mother liquor after stratification flows to the mother liquor tank for reuse.

[0033] A jacketed heater 5 is provided in the middle and lower part of the tank body, and the top plate of the tank body is connected to a liquid level meter 3, an exhaust gas outlet pipe 4 and an observation hole 9 respectively.

[0034] The feed port is a 45° inverted structure to avoid blockage of the feed port.

[0035] The liquid level meter 3 is installed on the top of the tank body, has the functions of local display and remote transmission, and is interlocked with the regulating valve in front of the feed port 1.

[0036] The separation tank is equipped with a jacketed heater 5, which heats and insulates the acid tar in the tank, promoting its stratification and preventing the coal and coke powder from hardening at the bottom. The heating and insulation jacket utilizes electrical or hot water heating to maintain a temperature below 75°C. A heat source outlet 10 and inlet 11 are located at the top and bottom of the heater, respectively.

[0037] After the acid tar in the separation tank is separated into layers, the mother liquor in the middle can be discharged from the middle layer outlet, the heavy sediment containing coal powder, coke powder, etc. at the bottom of the tank is discharged from the lower layer outlet 2, and the acid tar floating on the top is discharged from the uppermost layer outlet. Each layer is discharged separately.

[0038] The easily disassembled transparent quick connector 6 can be used to observe the discharge situation and is convenient for maintenance and replacement.

[0039] The observation hole 9 is for the convenience of the inspection personnel to observe the actual situation in the tank, and also serves as a spare interface of the device.

[0040] A manhole 8 is provided in the lower middle part of the tank body to facilitate maintenance of the tank body.

[0041] An exhaust gas outlet pipe 4 is provided on the top of the tank body to keep the tank body sealed and prevent the exhaust gas from escaping.

[0042] The terms "connected" and "connection" in the present invention should be understood in a broad sense. For example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] The utility model realizes the effective separation of acid tar, mother liquor and tar sediment and the recycling of mother liquor; realizes the effective control of the liquid level of the separation tank, ensures the separation effect and production safety, and realizes automation; recovers tail gas in an organized manner to avoid escape, and improves the work site environment.

Claims

1. A coking ammonium sulfate tar separation device, characterized in that: It includes a separation tank, a feed port is arranged in the middle of the separation tank body, and three layers of drainage ports are respectively arranged on the side of the tank body, the upper drainage port is used to discharge acid tar, the middle drainage port is used to discharge mother liquor, and the lower drainage port is used to discharge tar sediment; a middle full flow pipe is provided in the tank body, a jacketed heater is provided in the middle and lower part of the tank body, and the top plate of the tank body is respectively connected to a liquid level meter, an exhaust gas outlet pipe and an observation hole.

2. The coking ammonium sulfate tar separation device according to claim 1, characterized in that: The middle section full flow pipe is a 90° elbow pipe, the bottom of which is inserted into the position below the acid tar liquid level in the tank body, and the top outlet is arranged above the three-layer discharge port.

3. The coking ammonium sulfate tar separation device according to claim 2, characterized in that: The bottom of the middle full flow pipe is connected to the inner wall of the separation tank through a short pipe.

4. The coking ammonium sulfate tar separation device according to claim 1, characterized in that: The feed port is a 45° inverted structure to avoid blockage of the feed port.

5. The coking ammonium sulfate tar separation device according to claim 1, characterized in that: The drainage pipes between the separation tank body and the three-layer drainage port adopt transparent quick connectors, which can observe the drainage separation status at any time and facilitate maintenance and disassembly.

6. The coking ammonium sulfate tar separation device according to claim 1, characterized in that: The liquid level gauge is an internal float type liquid level gauge installed on the top of the tank body and is interlocked with the liquid inlet automatic regulating valve to achieve effective control of the liquid level in the separation tank.

7. The coking ammonium sulfate tar separation device according to claim 1, characterized in that: The jacketed heater adopts electric heating or hot water heating to keep the temperature within 75℃. The upper and lower parts of the heater are provided with heat source inlet and outlet respectively.

8. The coking ammonium sulfate tar separation device according to claim 1, characterized in that: An exhaust gas outlet pipe is provided on the upper part of the tank body, and a quick interface is provided with the exhaust gas treatment device in the original system to prevent the exhaust gas from escaping.

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