Coking ammonium sulfate full-flow tank defoaming system

Abstract

The utility model discloses a coking ammonium sulfate full-flow tank defoaming system which comprises a full-flow tank, an acid tar and foam comprehensive separation tank and an acid tar separation centrifugal machine, and the full-flow tank is connected with the acid tar and foam comprehensive separation tank through a first full-flow pipeline. A first foam spraying pipe and a foam breaking separation net are arranged at the upper end of the acid tar and foam comprehensive separation tank at intervals, and a second foam spraying pipe is arranged at the upper end of the acid tar and foam comprehensive separation tank and located in the foam breaking separation net; when more acid tar or foam appears in the full flow tank, the acid tar or foam preferentially enters the acid tar and foam comprehensive separation tank through the first full flow pipeline. And the foam spraying pipe sprays and crushes the acid tar or foam flowing from the full-flow tank through continuous spraying. And then the foam becomes smaller after passing through the separation net and is further crushed through spraying of the defoaming pipe, so that defoaming is completed.

Description

Technical Field

[0001] This utility model relates to the field of coking ammonium sulfate unit production technology, specifically a defoaming system for a full-flow tank of coking ammonium sulfate. Background Technology

[0002] In my country's coking industry, there are two main technological processes for addressing secondary environmental pollution from HPF desulfurization wastewater: one is a salt extraction process involving concentration, purification, and evaporation of the desulfurization wastewater; the other is a sulfuric acid production process involving the concentration and incineration of the desulfurization wastewater. The concentrated sulfuric acid produced by this process can be used in the ammonium sulfate unit, enabling the internal recycling of ammonia and sulfur resources within the coking plant. Currently, sulfur foam and desulfurization wastewater incineration for sulfuric acid production are gradually becoming the mainstream processes for treating by-product salts and sulfur foam from desulfurization liquid in coking plants.

[0003] The desulfurization wastewater concentration and sulfuric acid production process uses low-quality sulfur foam and desulfurization wastewater as raw materials to produce concentrated sulfuric acid, which is then used as feedstock in the existing coke oven gas deammoniation process to produce ammonium sulfate. This achieves the harmless treatment of desulfurization wastewater and the effective recycling of sulfur resources after coke oven gas desulfurization, saving coking enterprises a significant amount of sulfuric acid raw material procurement costs annually. The low-quality sulfur foam and desulfurization wastewater incineration and sulfuric acid production process fundamentally solves a series of problems caused by the large-scale discharge of desulfurization wastewater, such as environmental pollution and equipment corrosion, as well as the ineffective utilization of sulfur resources after coke oven gas desulfurization and poor economic benefits. This aligns with the national policy of developing a circular economy and the requirements of green development for enterprises.

[0004] Sulfuric acid production from sulfur foam and desulfurization wastewater is currently classified into three main types based on the pretreatment process and incineration feed method: wet acid production, semi-dry acid production, and dry acid production. Large-scale coking plants commonly employ desulfurization wastewater-based acid production units. However, with the large-scale deployment of this process in the coking industry, numerous problems have gradually emerged regarding equipment selection and the production and use of sulfuric acid. The sulfuric acid produced by this process uses sulfur foam and desulfurization wastewater from the coal gas purification process as raw materials for incineration, resulting in concentrated sulfuric acid with significant impurities. Sampling reveals a large amount of insoluble suspended matter in the sulfuric acid samples. Most concerningly, some companies add this self-produced concentrated sulfuric acid to the ammonium sulfate production process, causing a large amount of foam in the ammonium sulfate circulating mother liquor, severely impacting production. In some cases, large amounts of acidic foam overflow from the ammonium sulfate overflow tank, causing severe corrosion of the production site's foundation and ground. Furthermore, in some companies, the acid tar foam produced enters the final cooling system through the saturator and gas pipeline, affecting the stable operation of the entire gas system. Excessive foam in the overflow tank can sometimes enter the entire exhaust gas treatment system through the exhaust gas pipe, affecting the stable operation of the entire exhaust gas treatment system. Utility Model Content

[0005] The purpose of this invention is to solve the above problems and provide a defoaming system for a coking ammonium sulfate full-flow tank, which can eliminate foam and impurities in self-produced sulfuric acid and eliminate the potential danger of foam entering the tail gas system.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A defoaming system for a coking ammonium sulfate full-flow tank includes a full-flow tank, an acid tar and foam integrated separation tank, and an acid tar separation centrifuge. The full-flow tank is connected to the acid tar and foam integrated separation tank through a first full-flow pipe. The acid tar and foam integrated separation tank is provided with a first foam spray pipe and a foam breaking screen at intervals at the upper end. The acid tar and foam integrated separation tank is provided with a second foam spray pipe located inside the foam breaking screen at the upper end.

[0008] The acid tar and foam integrated separation tank is connected to the acid tar separation centrifuge via an acid tar conveying pipeline.

[0009] The acid tar and foam integrated separation tank is equipped with a tail gas inlet and a tail gas outlet at the upper end. The tail gas inlet is connected to the tail gas pipeline at the upper end of the full flow tank through a pipeline, and the tail gas outlet is connected to the main tail gas pipeline through a pipeline.

[0010] Furthermore, it also includes a mother liquor storage tank, and the full-flow tank is connected to the mother liquor storage tank through a second full-flow pipe.

[0011] Furthermore, the acid tar and foam separation tank is connected to the first foam spray pipe and the second foam spray pipe through a defoaming pipe, and the defoaming pipe is equipped with a replenishment pump.

[0012] Furthermore, the acid tar and foam separation tank is equipped with several replenishment pump inlets.

[0013] Furthermore, the defoaming pipe is connected to a replenishing pipe, with one end of the replenishing pipe connected to the defoaming pipe and the other end connected to the full flow tank.

[0014] Furthermore, the defoaming pipe is connected to a circulating water pipe for external tap water.

[0015] Furthermore, the acid tar conveying pipeline is equipped with an acid tar conveying pump, and the acid tar and foam integrated separation tank is equipped with high, medium and low grade acid tar conveying pump inlets.

[0016] Furthermore, a baffle is provided at the lower end of the defoaming mesh in the acid tar and foam separation tank.

[0017] Furthermore, the acid tar and foam separation tank is equipped with a full-flow outlet.

[0018] Furthermore, the acid tar and foam separation tank is equipped with a level gauge port and a vent port.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model includes a full-flow tank, an acid tar and foam integrated separation tank, and an acid tar separation centrifuge. The full-flow tank is connected to the acid tar and foam integrated separation tank via a first full-flow pipe. The acid tar and foam integrated separation tank has a first foam spray pipe and a foam-breaking screen spaced at its upper end. The acid tar and foam integrated separation tank has a second foam spray pipe located within the foam-breaking screen at its upper end. When a large amount of acid tar or foam appears in the full-flow tank, the acid tar or foam preferentially enters the acid tar and foam integrated separation tank through the first full-flow pipe. The foam spray pipe continuously sprays and breaks up the acid tar or foam flowing from the full-flow tank. Afterwards, the foam becomes smaller after passing through the screen and is further broken up by the spray from the defoaming pipe, thus completing the defoaming process.

[0021] 2. In this utility model, the acid tar and foam integrated separation tank is connected to the acid tar separation centrifuge via an acid tar conveying pipeline. The acid tar separation centrifuge is used to separate the mother liquor containing a lot of impurities. After separation, the liquid is returned to the acid tar and foam integrated separation tank, and the solids fall into the acid tar slag hopper. In the acid tar separation centrifuge, the foaming impurities and solid particles in the mother liquor are filtered out, the foam gradually decreases, and the impurities in the system are continuously reduced, thereby solving the foaming problem in the full flow tank.

[0022] 3. The acid tar and foam integrated separation tank of this utility model is equipped with a tail gas inlet and a tail gas outlet at the upper end. The tail gas inlet is connected to the tail gas pipe at the upper end of the full flow tank through a pipe, and the tail gas outlet is connected to the main tail gas pipe through a pipe. To prevent excessive foam in the full flow tank from entering the main tail gas pipe with the tail gas and affecting the operation of the entire tail gas treatment system, tail gas inlet and outlet pipes are set at the top of the acid tar and foam integrated separation tank. After the tail gas enters at the top of the acid tar and foam integrated separation tank, the gas moves along the top, and the foam in the tail gas falls down. After being sprayed to remove foam, the tail gas no longer contains foam after exiting at the other end, eliminating the potential danger of foam entering the tail gas system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the present invention;

[0025] Figure 2This is a schematic diagram of the acid tar and foam integrated separation tank of this utility model;

[0026] Figure 3 This is a cross-sectional view of the bubble-breaking separator of this utility model.

[0027] In the diagram: 1. Full flow tank; 2. Comprehensive separation tank for acid tar and foam; 3. Acid tar separation centrifuge; 4. First full flow pipe; 5. Full flow inlet; 6. First foam spray pipe; 7. Defoaming screen; 8. Second foam spray pipe; 9. Small mother liquor pump; 10. Acid tar conveying pipe; 11. Tail gas inlet; 12. Tail gas outlet; 13. Mother liquor storage tank; 14. Second full flow pipe; 15. Defoaming pipe; 16. Make-up pump; 17. Make-up pipe; 18. Make-up pump inlet; 19. Circulating water pipe; 20. Acid tar conveying pump; 21. Acid tar conveying pump inlet; 22. Baffle plate; 23. Full flow port; 24. Liquid level gauge port; 25. Vent port. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, a defoaming system for a coking ammonium sulfate full-flow tank includes a full-flow tank 1, an acid tar and foam integrated separation tank 2, and an acid tar separation centrifuge 3. The full-flow tank 1 is connected to the acid tar and foam integrated separation tank 2 through a first full-flow pipe 4. The acid tar and foam integrated separation tank 2 is provided with a full-flow inlet 5. One end of the first full-flow pipe 4 is connected to the full-flow tank 1, and the other end of the first full-flow pipe 4 is connected to the full-flow inlet 5. The upper end of the acid tar and foam integrated separation tank 2 is provided with a first foam spray pipe 6 and a foam breaking screen 7 at intervals. The foam breaking screen 7 is provided in two parallel layers. The foam breaking screen is connected to the top flange of the acid tar and foam integrated separation tank and can be removed and replaced. The upper end of the acid tar and foam integrated separation tank 2 is provided with a second foam spray pipe 8 located inside the foam breaking screen 7. The full-flow tank 1 is connected to a small mother liquor pump 9. The mother liquor is pumped by the small mother liquor pump 9 to the saturator for spraying, and then returns to the full-flow tank 1 in the saturator. This is a conventional process.

[0030] When a large amount of acid tar or foam appears in the overflow tank, the first overflow pipe 4, connecting the overflow tank to the acid tar and foam separation tank, is opened manually. The acid tar or foam preferentially enters the acid tar and foam separation tank through the first overflow pipe 4. A foam spray pipe is installed in the acid tar and foam separation tank. Through continuous spraying, the acid tar or foam flowing from the overflow tank is broken up, and most of the foaming substances are dispersed into the mother liquor. A foam-breaking screen 7 is installed in the acid tar and foam separation tank. A second foam spray pipe 8 is directly connected to the two layers of foam-breaking screens. The second foam spray pipe 8 is arranged along the screen. After passing through the screen, the foam becomes smaller and is further broken up by the spray from the defoaming pipe. The acid tar or foam that has been defoamed once by the first foam spray pipe 6 passes through the foam-breaking screen 7, breaking up the remaining larger foam, and then passes through the second foam spray pipe 8 to break up the smaller foam, thus completing the defoaming process.

[0031] The saturator is a key piece of equipment in the coking plant's coal gas purification process for producing ammonium sulfate. Its main function is to absorb ammonia (NH3) from coke oven gas by spraying mother liquor into the saturator. To ensure absorption efficiency, concentrated sulfuric acid (H2SO4) is continuously added to the mother liquor to maintain its acidity. When the sulfuric acid-containing mother liquor has absorbed enough ammonia, a large amount of ammonium sulfate crystals will form at the bottom of the saturator. These crystals can be transported away by conveying equipment, and solid ammonium sulfate product is obtained after centrifugation, drying, and other steps.

[0032] like Figure 1 As shown, the acid tar and foam separation tank 2 is connected to the acid tar separation centrifuge 3 via an acid tar conveying pipe 10. The acid tar separation centrifuge 3 is equipped with an acid tar slag hopper at its lower end. The acid tar separation centrifuge 3 is used to separate the mother liquor containing a lot of impurities. After separation, the liquid is returned to the acid tar and foam separation tank 2, while the solids fall into the acid tar slag hopper. In the acid tar separation centrifuge 3, foaming impurities and solid particles in the mother liquor are filtered out, the foam gradually decreases, and the impurities in the system are continuously reduced, thereby solving the foaming problem in the full-flow tank.

[0033] The acid tar separation centrifuge 3 can continuously separate solid impurities from mother liquor containing foam or acid tar. The solid impurities fall into the acid tar residue hopper, and the separated mother liquor flows back to the acid tar and foam integrated separation tank 2 by gravity through the return port of the acid tar separation centrifuge 3, thereby achieving complete separation of the mother liquor from the foaming impurities therein.

[0034] like Figure 1 and Figure 2 As shown, the acid tar and foam integrated separation tank 2 is provided with a tail gas inlet 11 and a tail gas outlet 12 at the upper end. The upper end of the full flow tank 1 is also connected to the main tail gas pipeline through a pipe. The tail gas inlet 11 is connected to the tail gas pipeline at the upper end of the full flow tank 1 through a pipe. The tail gas outlet 12 is connected to the main tail gas pipeline through a pipe.

[0035] Valves are installed at the upper ends of the exhaust gas pipe and the pipe connection point at the upper end of the full flow tank 1. A valve is also installed on the pipe connecting the exhaust gas inlet 11 to the exhaust gas pipe at the upper end of the full flow tank 1. Under normal circumstances, the valve on the exhaust gas pipe at the upper end of the full flow tank 1 is closed, and the valve on the pipe is open. During maintenance, the valve on the pipe is closed, and the valve on the exhaust gas pipe at the upper end of the full flow tank 1 is open.

[0036] To prevent excessive foam in the overflow tank from entering the main exhaust gas pipeline and affecting the operation of the entire exhaust gas treatment system, exhaust gas inlet and outlet pipes are installed at the top of the acid tar and foam integrated separation tank. After the exhaust gas enters the top of the acid tar and foam integrated separation tank, the gas moves along the top, and the foam in the exhaust gas falls down. After being sprayed to defoam, the exhaust gas no longer contains foam after exiting at the other end, eliminating the potential risk of foam entering the exhaust gas system. When there is a lot of foam in the exhaust gas in the overflow tank 1, it can enter one end of the acid tar and foam integrated separation tank 2 through the exhaust gas pipeline at the upper end of the overflow tank 1. In the acid tar and foam integrated separation tank 2, the foam can be further broken and defoamed through the first foam spray pipe 6, the foam breaking mesh 7, and the second foam spray pipe 8. The foam-free exhaust gas enters the exhaust gas collection system at the exhaust gas outlet 12 at the other end of the acid tar and foam integrated separation tank 2.

[0037] like Figure 1 As shown, it also includes a mother liquor storage tank 13, and the full-flow tank 1 is connected to the mother liquor storage tank 13 through a second full-flow pipe 14. The liquid level in the full-flow tank is determined by a level gauge. When the mother liquor level in the full-flow tank 1 is too high and there is little acid tar or foam, the first full-flow pipe 4 between the full-flow tank 1 and the acid tar and foam integrated separation tank 2 needs to be closed. The mother liquor can then flow into the mother liquor storage tank through the second full-flow pipe 14, preventing the mother liquor in the full-flow tank from entering the acid tar and foam integrated separation tank or overflowing.

[0038] The mother liquor storage tank is used for temporary storage of liquid. Firstly, when the liquid level in the full flow tank is high, it can flow into the mother liquor storage tank through the full flow pipe to prevent overflow. Secondly, when the ammonium sulfate unit is carrying out mother liquor preparation, water needs to be added to the full flow tank manually, and then the liquid in the full flow tank is sent to the saturator by a pump.

[0039] like Figure 1 As shown, the acid tar and foam separation tank 2 is connected to the first foam spray pipe 6 and the second foam spray pipe 8 through the defoaming pipe 15. The defoaming pipe 15 is equipped with a replenishment pump 16. The liquid sprayed by the first foam spray pipe 6 and the second foam spray pipe 8 is the liquid without foam and solid impurities at the bottom of the acid tar and foam separation tank, which is extracted by the replenishment pump 16 and sprayed through the spray pipe to break up the foam.

[0040] like Figure 2As shown, the acid tar and foam integrated separation tank 2 is equipped with several replenishment pump inlets 18. The mother liquor at different locations in the tank is selected as the spray mother liquor for defoaming according to the condition of the mother liquor in the tank.

[0041] The acid tar and foam integrated separation tank 2 is equipped with more than 18 replenishment pump inlets. Depending on the cleanliness of the mother liquor in the tank, mother liquor from different locations in the tank can be selected as spray mother liquor for defoaming. The cleanliness of the mother liquor can generally be seen by releasing the liquid, i.e., by setting branch valves on this pipeline, or by setting a sight glass. Multiple ports are set at the horizontal position to observe whether there is a lot of foam. When necessary, the port with less foam is opened.

[0042] like Figure 1 As shown, the defoaming pipe 15 is connected to a liquid replenishment pipe 17. One end of the liquid replenishment pipe 17 is connected to the defoaming pipe 15, and the other end of the liquid replenishment pipe 17 is connected to the full flow tank 1.

[0043] When the amount of mother liquor flowing from the saturator to the full-flow tank 1 decreases and the liquid level in the full-flow tank 1 becomes low, the replenishment pump 16 is activated, and the replenishment pipeline 17 is connected, sending the mother liquor from the acid tar and foam integrated separation tank 2 to the full-flow tank 1 to maintain a stable liquid level in the full-flow tank 1. This prevents the mother liquor level in the full-flow tank 1 from becoming too low and causing the small mother liquor pump 9 to stop, and it also maintains the liquid level within a certain range, ensuring a continuous flow of acid tar or foam into the acid tar and foam integrated separation tank 2.

[0044] like Figure 1 As shown, the defoaming pipe 15 is connected to a circulating water pipe 19 for external tap water. An observation hole can be set on the tank to observe the spraying effect. When the mother liquor contains a lot of foaming medium, circulating water can be introduced to spray through the first foam spraying pipe 6 and the second foam spraying pipe 8 to improve the defoaming effect.

[0045] like Figure 1 and Figure 2 As shown, the acid tar conveying pipeline 10 is equipped with an acid tar conveying pump 20, and the acid tar and foam integrated separation tank 2 is equipped with high, medium and low grade acid tar conveying pump inlets 21. According to the foam height in the tank, inlets of different heights are opened to better extract more liquid layers containing foam or acid tar and send them to the acid tar separation centrifuge.

[0046] The acid tar and foam integrated separation tank 2 is equipped with high, medium and low grade acid tar transfer pump inlets 21. In actual operation, observation holes can be set on the tank body according to the foam height in the tank. The spraying effect can be observed through the observation holes. The acid tar transfer pump inlets 21 of different heights can be opened to extract foam or acid tar, which is then sent to the acid tar separation centrifuge 3 via the acid tar transfer pump 20.

[0047] like Figure 2and Figure 3 As shown, the lower end of the defoaming mesh 7 in the acid tar and foam separation tank 2 is equipped with a baffle 22. The bottom of the baffle 22 allows the mother liquor to flow through. The main function of the baffle 22 is to block the acid tar and foam floating on the upper layer of the mother liquor, allowing the acid tar and foam on the upper layer of the mother liquor to be broken by the defoaming mesh 7 without affecting the flow of the liquid mother liquor at the bottom of the acid tar and foam separation tank 2. The baffle 22 can isolate the foam, allowing for defoaming spraying within the effective area. The lower part of the baffle 22 provides space for the mother liquor to flow, facilitating its movement at the bottom.

[0048] like Figure 2 As shown, the acid tar and foam integrated separation tank 2 is provided with a full flow port 23. When the liquid level in the acid tar and foam integrated separation tank 2 exceeds the full flow port 23, the excess mother liquor overflows to other tanks.

[0049] like Figure 2 As shown, the acid tar and foam integrated separation tank 2 is equipped with a level gauge port 24 and a vent port 25, which are used to detect the liquid level in the tank and to vent the liquid in the tank during maintenance.

[0050] In the description of this utility model, it should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A defoaming system for a full-flow tank of coking ammonium sulfate, characterized in that, The system includes a full-flow tank (1), an acid tar and foam integrated separation tank (2), and an acid tar separation centrifuge (3). The full-flow tank (1) is connected to the acid tar and foam integrated separation tank (2) through a first full-flow pipe (4). The acid tar and foam integrated separation tank (2) is provided with a first foam spray pipe (6) and a foam breaking screen (7) at intervals at the upper end. The acid tar and foam integrated separation tank (2) is provided with a second foam spray pipe (8) located inside the foam breaking screen (7) at the upper end. The acid tar and foam integrated separation tank (2) and the acid tar separation centrifuge (3) are connected through an acid tar conveying pipeline (10); The acid tar and foam integrated separation tank (2) is provided with a tail gas inlet (11) and a tail gas outlet (12) at the upper end. The tail gas inlet (11) is connected to the tail gas pipe at the upper end of the full flow tank (1) through a pipe, and the tail gas outlet (12) is connected to the main tail gas pipe through a pipe.

2. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 1, characterized in that, It also includes a mother liquor storage tank (13), and the full flow tank (1) is connected to the mother liquor storage tank (13) through a second full flow pipe (14).

3. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 1, characterized in that, The acid tar and foam separation tank (2) is connected to the first foam spray pipe (6) and the second foam spray pipe (8) through the defoaming pipe (15), and the defoaming pipe (15) is equipped with a replenishment pump (16).

4. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 3, characterized in that, The acid tar and foam integrated separation tank (2) is equipped with several replenishment pump inlets (18).

5. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 3, characterized in that, The defoaming pipe (15) is connected to a replenishing pipe (17). One end of the replenishing pipe (17) is connected to the defoaming pipe (15), and the other end of the replenishing pipe (17) is connected to the full flow tank (1).

6. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 3, characterized in that, The defoaming pipe (15) is connected to a circulating water pipe (19) for external tap water.

7. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 1, characterized in that, The acid tar conveying pipeline (10) is equipped with an acid tar conveying pump (20), and the acid tar and foam integrated separation tank (2) is equipped with high, medium and low grade acid tar conveying pump inlets (21).

8. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 1, characterized in that, The lower end of the defoaming mesh (7) in the acid tar and foam separation tank (2) is provided with a baffle (22).

9. The defoaming system for a full-flow tank of coking ammonium sulfate as described in claim 1, characterized in that, The acid tar and foam separation tank (2) is equipped with a full flow port (23).

10. The defoaming system for a full-flow tank of ammonium sulfate coking as described in claim 1, characterized in that, The acid tar and foam separation tank (2) is equipped with a level gauge port (24) and a vent port (25).

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