A tank bottom protein recovery and semi-finished product desulfurization and deacidification system

Abstract

This application relates to a tank bottom protein recovery and semi-finished product desulfurization and deacidification system, comprising: a tank body, with an inlet pipe on the upper left side of the tank body and two feed pipes on the inner left side of the tank body; a gas scrubbing tower, with a process water inlet pipe and an air inlet pipe on the upper and lower sides of the left end of the gas scrubbing tower, respectively, and the air inlet pipe connected to the upper right side of the tank body; an outlet pipe at the upper end of the gas scrubbing tower; and a circulation pipe at the right end of the gas scrubbing tower, with a circulation pump and a self-circulation valve on the circulation pipe, and the outlet of the circulation pump connected to a drain pipe; and a discharge pump, with the inlet of the discharge pump connected to the lower right end of the tank body via a discharge pipe, and the outlet of the discharge pump connected to a discharge pipe. The device provided in this application embodiment can reduce the probability of finished product defects, the loss of bioethanol, and increase the recovery rate of protein feed.

Description

Technical Field

[0001] This application relates to the field of gaseous bio-fermentation technology, and in particular to a tank bottom protein recovery and semi-finished product desulfurization and deacidification system. Background Technology

[0002] Ethanol production via bio-fermentation of metallurgical industrial waste gas is an emerging gaseous bio-fermentation technology. This fermentation technology utilizes specific microorganisms (Clostridium ethanolans) to convert carbon monoxide and hydrogen from industrial waste gas or biomass syngas into compounds such as ethanol through their own biological metabolism within a bioreactor.

[0003] In the production process of fuel ethanol from industrial waste gas or biomass syngas through bio-fermentation, sulfur (an important component of coenzymes such as sulfur-containing amino acids, biotin, and thiamine in microbial cells) needs to be added to ensure the normal growth and metabolism of Clostridium ethanolii. In addition, the raw gas also contains a large amount of sulfur components. Excessive sulfur will dissolve into the liquid mash, and the sulfur in the mash will enter the finished wine during the distillation and purification process, affecting the qualification rate of the finished wine. Therefore, we propose a tank bottom protein recovery and semi-finished product desulfurization and deacidification system and method. Summary of the Invention

[0004] This application provides a tank bottom protein recovery and semi-finished product desulfurization and deacidification system to solve the problem that in the production process of fuel ethanol by bio-fermentation of industrial tail gas or biomass syngas, the raw gas also contains a large amount of sulfur components. Excess sulfur will be incorporated into the liquid mash, and the sulfur in the mash will enter the finished wine during the distillation and purification process, affecting the qualified rate of the finished wine.

[0005] This application provides a tank bottom protein recovery and semi-finished product desulfurization and deacidification system, including:

[0006] The tank body has two liquid inlet pipes on the upper left side, and a bottom feed pipe and a top feed first coil pipe are provided on the inner left side of the tank body;

[0007] A gas scrubbing tower is provided with a process water inlet pipe and an air inlet pipe on the upper and lower sides of the left end, respectively. The air inlet pipe is connected to the upper right side of the tank body. The upper end of the gas scrubbing tower is provided with an air outlet pipe, and the right end of the gas scrubbing tower is provided with a circulation pipe. The circulation pipe is equipped with a circulation pump and a self-circulation valve. The outlet of the circulation pump is connected to a drain pipe.

[0008] The discharge pump has its inlet connected to the lower right end of the tank via a discharge pipe, and its outlet is connected to a discharge pipe.

[0009] Preferably, the liquid outlet of the inlet pipe is connected to the liquid inlet of the bottom feed pipe and the top feed first coil, and the upper end pipes of the bottom feed pipe and the top feed first coil are respectively provided with a liquid inlet bottom valve and a liquid inlet top spray valve.

[0010] Preferably, the discharge pipe is provided in two sets, the two sets of discharge pipes are independent and each covers half of the bottom of the tank, and a nitrogen pipe is provided on the left side of each discharge pipe, and a first nitrogen valve and a second nitrogen valve are respectively provided on the nitrogen pipe.

[0011] Preferably, the left end of the discharge pipe is connected to a second coil, the lower end of the second coil is evenly connected to a plurality of liquid inlet heads, and the right side of the discharge pipe is connected to a first pump feed valve and a second pump feed valve.

[0012] Preferably, the outlet of the discharge pipe is provided with two discharge pipes, which are respectively a distillation pipe and a protein removal pipe, and a first control valve and a second control valve are respectively connected to the distillation pipe and the protein removal pipe.

[0013] Preferably, the exhaust pipe is equipped with a tail gas Roots blower.

[0014] Preferably, the drain pipe is equipped with a water reuse valve, and the process water inlet pipe is equipped with a process water inlet tank valve.

[0015] Preferably, the lower end of the top feed first coil is uniformly and fixedly connected with multiple liquid outlets, and the lower end of the bottom feed pipe is inserted into the lower part of the inner cavity of the tank.

[0016] Preferably, there are two sets of the second coil, and the discharge ports of the two second coils are respectively connected to the feed valve of the first pump and the feed valve of the second pump through discharge pipes.

[0017] The technical solutions provided in this application have the following advantages compared with the prior art:

[0018] The apparatus provided in this application embodiment has a pipeline to the protein and distillation system at the bottom pump outlet. The pump inlet pipeline is designed to cover the entire bottom of the tank by using a pipe with small holes. This allows for the periodic and effective pumping of protein deposited at the bottom of the tank into the protein system for further concentration, enabling protein recovery and increasing yield. If blockage occurs, nitrogen can be used for purging. If the sulfur and acid content in the semi-finished liquid exceeds the standard, the nitrogen stripping system at the bottom of the tank can be activated to strip the sulfides from the semi-finished product. The stripped gas passes through a water washing tower and undergoes counter-current exchange with the process water, effectively dissolving the ethanol in the stripped gas and washing it off. This water can be used for distillation and distillation recovery, reducing ethanol loss. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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.

[0021] Figure 1 This is an overall structural diagram of a tank bottom protein recovery and semi-finished product desulfurization and deacidification system provided in an embodiment of this application;

[0022] Figure 2 This is a top sectional view of a tank body for a tank bottom protein recovery and semi-finished product desulfurization and deacidification system provided in an embodiment of this application.

[0023] In the diagram: 1. Tank body; 2. Liquid inlet bottom valve; 3. Liquid inlet top spray valve; 4. First nitrogen valve; 5. First pump feed valve; 6. Discharge pump; 7. First control valve; 8. Second control valve; 9. Gas scrubbing tower; 10. Circulation pump; 11. Process water inlet valve; 12. Self-circulation valve; 13. Water reuse valve; 14. Tail gas Roots blower; 15. Top feed first coil; 16. Liquid inlet pipe; 17. Bottom feed pipe; 18. Second coil; 19. Discharge pipe; 20. Gas outlet pipe; 21. Liquid discharge pipe; 22. Second nitrogen valve; 23. Second pump feed valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Various embodiments of this application may exist in the form of a range. It should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of this application. Therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. In addition, whenever a numerical range is indicated in this application, it means including any referenced number (fraction or integer) within the indicated range. Unless otherwise specified, all raw materials, reagents, instruments, and equipment used in this application can be purchased commercially or prepared using existing equipment.

[0026] In this application, unless otherwise stated, directional terms such as "upper" and "lower" specifically refer to the drawing directions in the accompanying drawings. Furthermore, in this application, the terms "comprising," "including," etc., mean "including but not limited to." In this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this application, "and / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. A and B can be singular or plural. In this application, "at least one" means one or more, and "more than one" means two or more. "At least one," "at least one of the following," or similar expressions refer to any combination of these items, including any combination of a single item or a plural item. For example, "at least one of a, b, or c" or "at least one of a, b, and c" can both mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be a single or multiple.

[0027] like Figures 1 to 2 As shown in the figure, this application provides a tank bottom protein recovery and semi-finished product desulfurization and deacidification system, including:

[0028] Tank 1, the upper left side of the tank 1 is provided with two liquid inlet pipes 16, one entering from the bottom of the tank and the other entering from the top feeding first coil 15, which can be switched automatically according to the sulfur content; the inner left side of the tank 1 is provided with a bottom feeding pipe 17 and a top feeding first coil 15.

[0029] Gas scrubbing tower 9, with process water inlet pipe and air inlet pipe respectively on the upper and lower sides of the left end of the gas scrubbing tower 9, and the air inlet pipe connected to the upper right side of the tank body 1, the upper end of the gas scrubbing tower 9 is provided with air outlet pipe 20, and the right end of the gas scrubbing tower 9 is provided with circulation pipe, and circulation pump 10 and self-circulation valve 12 are provided on the circulation pipe, and the outlet of circulation pump 10 is connected to drain pipe 21;

[0030] The discharge pump 6 has its inlet connected to the lower right end of the tank 1 via a discharge pipe, and its outlet is connected to a discharge pipe 19.

[0031] Specifically: Both the gas scrubbing tower 9 and the discharge pump 6 use existing equipment on the market. Furthermore, during the cleaning of the inside of the tank 1, the liquid inlet bottom valve 2 is closed, and the liquid inlet top spray valve 3 is opened. The bubble-rich liquid is sprayed down from the top feed first coil 15, causing the bubbles to precipitate and carrying away some of the sulfur-containing and acidic gases from the liquid.

[0032] To prevent excessive sulfur and acid from entering the finished wine system, this equipment includes sulfur and acid stripping components. Simultaneously, the stripped gas enters gas scrubbing tower 9, effectively retaining ethanol in the semi-finished liquid and preventing product yield loss.

[0033] Additionally, tank 1, as a general term for a type of tank, when used as a semi-finished product clear and mash storage tank, only requires the addition of components such as liquid inlet spray valve 3, first nitrogen valve 4, first pump feed valve 5, tail gas Roots blower 14, and top feed first coil 15 to strip sulfur and acid from the semi-finished product, while also preventing bacteria from accumulating at the bottom of the tank. The top feed first coil 15 adopts a distribution pipe method to better pump the protein deposited at the bottom of the tank along with the liquid into the downstream process. The tail gas enters the gas scrubbing tower 9 system for alcohol gas recovery, and the scrubbed tail gas is transported to the oxidizer for incineration through the tail gas Roots blower 14. When tank 1 is used as a wastewater clarification tank for reuse, only a second control valve 8, a top feed first coil 15, and a tail gas Roots blower 14 are added. The clarified liquid contains soluble protein, which will denature and precipitate during high-temperature distillation and settle in the clarification tank. Normally, the precipitated protein will enter the wastewater treatment system. The added top feed first coil 15 component periodically pumps the protein deposited at the bottom of the tank into the protein processing section for recovery. Odor-containing gases directly enter the gas outlet pipe 20 and enter the oxidizer for incineration.

[0034] This application enables the removal of sulfur and acid components from semi-finished liquid products and the homogenization and recovery of deposited proteins, laying the foundation for the qualification of finished ethanol, reducing ethanol loss, and recovering protein feed.

[0035] like Figure 1As shown: the liquid outlet of the liquid inlet pipe 16 is connected to the liquid inlet of the bottom feed pipe 17 and the top feed first coil 15, and the upper end pipes of the bottom feed pipe 17 and the top feed first coil 15 are respectively equipped with a liquid inlet bottom valve 2 and a liquid inlet top spray valve 3.

[0036] Specifically: The liquid inlet bottom valve 2 and the liquid inlet top spray valve 3 are valves available on the market, which respectively control the opening and closing status of the bottom feed pipe 17 and the top feed first coil 15.

[0037] like Figure 1 and Figure 2 As shown: There are two sets of discharge pipes. The two sets of discharge pipes are independent and each covers half of the bottom of the tank. Nitrogen pipes are provided on the left side of each discharge pipe. A first nitrogen valve 4 and a second nitrogen valve 22 are provided on the nitrogen pipes respectively.

[0038] Specifically: the first nitrogen valve 4 and the second nitrogen valve 22 both adopt existing equipment on the market, and the first nitrogen valve 4 and the second nitrogen valve 22 respectively control the on / off state of the two nitrogen pipes.

[0039] like Figure 1 As shown: the left end of the discharge pipe is connected to the second coil 18, and the lower end of the second coil 18 is evenly connected to multiple liquid inlet heads. The right side of the discharge pipe is connected to the first pump feed valve 5 and the second pump feed valve 23.

[0040] Specifically: Two sets of second coils 18: one set is used for material discharge, and multiple liquid inlets can effectively remove and recover the protein sediment at the bottom of the tank; the other set can introduce nitrogen gas through multiple liquid inlets to evenly distribute the nitrogen gas and blow off some sulfur components.

[0041] like Figure 1 and Figure 2 As shown: The outlet of the discharge pipe 19 is provided with two discharge pipes, which are respectively a distillation pipe and a protein removal pipe, and a first control valve 7 and a second control valve 8 are respectively connected to the distillation pipe and the protein removal pipe.

[0042] Specifically: the first control valve 7 and the second control valve 8 control the switching state of the connected pipeline respectively, and the first control valve 7 and the second control valve 8 open accordingly when the target material is discharged.

[0043] like Figure 1 As shown: The exhaust pipe 20 is equipped with an exhaust gas Roots blower 14.

[0044] Specifically: the exhaust gas Roots blower 14 adopts existing blowers on the market, and the exhaust gas Roots blower 14 can extract exhaust gas, so that the exhaust gas flows into the incinerator for combustion.

[0045] like Figure 1 As shown: The drain pipe 21 is equipped with a water reuse valve 13, and the process water inlet pipe is equipped with a process water inlet tank valve 11.

[0046] Specifically: When the process water inlet valve 11 is open, process water can be added to the gas scrubbing tower 9.

[0047] like Figure 1 As shown: the lower end of the top feed first coil 15 is uniformly fixedly connected with multiple liquid outlets, and the lower end of the bottom feed pipe 17 is inserted into the lower part of the inner cavity of the tank body 1.

[0048] Specifically: the bottom feed pipe 17 and the top feed first coil 15 can add mash to the inside of the tank 1, and the bottom feed pipe 17 can add mash to the lower side of the inside of the tank 1.

[0049] like Figure 2 As shown: There are two sets of the second coil 18, and the discharge ports of the two second coils 18 are respectively connected to the first pump feed valve 5 and the second pump feed valve 23 through the discharge pipe.

[0050] Specifically: the first pump feed valve 5 and the second pump feed valve 23 both adopt existing equipment on the market, and the first pump feed valve 5 and the second pump feed valve 23 respectively control the opening and closing status of the two discharge pipes.

[0051] When the equipment is in operation, the bottom discharge system adopts the method of adding a distribution pipe. The distribution pipe is divided into two parts. One part discharges normally while the other part can perform nitrogen stripping. The two parts alternate. Specifically, the operation is as follows: the second nitrogen valve 22 is closed, the second pump inlet valve 23 is open, and the first pump inlet valve 5 is closed. This upper part of the pipeline realizes the normal function of mash delivery. The first nitrogen valve 4 is opened, and nitrogen enters the tank and is distributed into the mash through the holes. Conversely, the second nitrogen valve 22 is open, the second pump inlet valve 23 is closed, the first nitrogen valve 4 is closed, and the first pump inlet valve 5 is open. This lower part of the pipeline realizes the normal function of mash delivery, and nitrogen enters the tank and is distributed into the mash through the holes. Nitrogen can also carry out some of the dissolved sulfur and acidic substances in the mash. The two parts alternate to realize the functions of discharge and stripping.

[0052] The gas released from the top feed and the gas stripped by nitrogen at the bottom contain a certain amount of alcohol. The tail gas is introduced into the washing tower 9 of the distillation section through a pipeline for alcohol recovery. The washed tail gas is sent to the incinerator through pipeline 14 for incineration.

[0053] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed in this application.

Claims

1. A system for recovering protein from the bottom of a tank and for desulfurizing and deacidifying semi-finished products, characterized in that, Used in the bio-fermentation process for producing ethanol from tail gas in the metallurgical industry, including: Tank (1), the upper left side of the tank (1) is provided with two liquid inlet pipes (16), one for bottom of the tank and one for top of the tank, which can be switched automatically according to the sulfur content. The inner left side of the tank (1) is provided with bottom feed pipe (17) and top feed first coil (15). Gas scrubbing tower (9) has a process water inlet pipe and an air inlet pipe on the upper and lower sides of the left end of the gas scrubbing tower (9), and the air inlet pipe is connected to the upper right side of the tank (1). The upper end of the gas scrubbing tower (9) is provided with an air outlet pipe (20), and the right end of the gas scrubbing tower (9) is provided with a circulation pipe. The circulation pipe is provided with a circulation pump (10) and a self-circulation valve (12). The outlet of the circulation pump (10) is connected to a drain pipe (21). The discharge pump (6) has its inlet connected to the lower right end of the tank (1) via a discharge pipe, and its outlet is connected to a discharge pipe (19). The discharge pipe is provided in two sets. The two sets of discharge pipes are independent and each covers half of the bottom of the tank. Nitrogen pipes are provided on the left side of each discharge pipe. A first nitrogen valve (4) and a second nitrogen valve (22) are provided on the nitrogen pipes respectively. The left end of the discharge pipe is connected to the second coil (18), and the lower end of the second coil (18) is evenly connected to multiple liquid inlet heads. The right side of the discharge pipe is connected to the first pump feed valve (5) and the second pump feed valve (23). The two sets of discharge pipes can alternately perform discharge and nitrogen stripping operations to achieve simultaneous operation of protein recovery from the tank bottom and desulfurization and deacidification of semi-finished products.

2. The tank bottom protein recovery and semi-finished product desulfurization and deacidification system according to claim 1, characterized in that: The outlet of the inlet pipe (16) is connected to the inlet of the bottom feed pipe (17) and the top feed first coil (15), and the bottom valve (2) and the top spray valve (3) of the liquid inlet pipe (17) and the top feed first coil (15) are respectively provided on the upper end pipes.

3. The tank bottom protein recovery and semi-finished product desulfurization and deacidification system according to claim 1, characterized in that: The outlet of the discharge pipe (19) is provided with two discharge pipes, which are respectively a distillation pipe and a protein removal pipe, and a first control valve (7) and a second control valve (8) are respectively connected to the distillation pipe and the protein removal pipe.

4. The tank bottom protein recovery and semi-finished product desulfurization and deacidification system according to claim 1, characterized in that: The exhaust pipe (20) is equipped with a tail gas Roots blower (14).

5. The tank bottom protein recovery and semi-finished product desulfurization and deacidification system according to claim 1, characterized in that: The drain pipe (21) is equipped with a water reuse valve (13), and the process water inlet pipe is equipped with a process water inlet tank valve (11).

6. The tank bottom protein recovery and semi-finished product desulfurization and deacidification system according to claim 2, characterized in that: The lower end of the top feed first coil (15) is uniformly fixedly connected with multiple liquid outlets, and the lower end of the bottom feed pipe (17) is inserted into the lower part of the inner cavity of the tank (1).

7. The tank bottom protein recovery and semi-finished product desulfurization and deacidification system according to claim 1, characterized in that: The second coil (18) is provided in two sets, and the discharge ports of the two second coils (18) are respectively connected to the first pump feed valve (5) and the second pump feed valve (23) through the discharge pipe.

Images