A composite steam-jet vacuum pump unit system using green energy

Abstract

The application discloses a kind of composite type steam injection vacuum pump unit of green energy utilization system, comprising: vacuum crystallizer, first condenser, for the condensation unloading of condensable gas in mixed gas in vacuum crystallizer, second injection pump, its mixed gas inlet is connected with the primary side outlet of first condenser, second condenser, for the condensation unloading of condensable gas in mixed gas being extracted by second injection pump and being sent into it, third injection pump, its mixed gas inlet is connected with the primary side outlet of second condenser, third condenser, for the condensation unloading of condensable gas in mixed gas being extracted by third injection pump and being sent into it, wherein, cooling water system is natural water source, cooling tower or refrigeration equipment, and water supply water temperature is 1.0-15.0 degrees;The application can utilize natural water source to achieve the effect of reducing steam consumption, reduce cost, under the condition of 1.0-15.0 degrees low temperature, can save steam volume by 85-90% at most.

Description

Technical Field

[0001] This invention belongs to the field of vacuum crystallization, and in particular relates to a system of a composite steam jet vacuum pump unit that utilizes green energy. Background Technology

[0002] Existing vacuum crystallization processes utilize the principle that the boiling point of liquids decreases under vacuum conditions, enabling the liquid to be purified through evaporation, concentration, cooling, and crystallization to achieve stable production of industrial products. In this system, the jet pump system is the decisive factor in ensuring production.

[0003] The jet pump system consumes a large amount of steam and cooling water, resulting in high operating costs. The condenser settings are related to both the temperature of the condensate and the partial pressure of water vapor in the gas discharged by the jet pump. Therefore, the partial pressure of water vapor in the mixed gas must be greater than the saturation pressure corresponding to the condenser inlet water temperature.

[0004] In summer, the condensate temperature in the condenser reaches around 38 degrees Celsius. This excessively high cooling water temperature prevents a large amount of secondary steam from condensing in time, causing a decrease and instability in the vacuum level of the vacuum crystallizer, which in turn affects product quality and yield. Therefore, there is an urgent need for new types of vacuum pumps to reduce steam and cooling water consumption and operating costs, overcome the interference of high water temperatures in summer, and improve product quality and yield. Summary of the Invention

[0005] The purpose of this invention is to provide a composite system of steam jet vacuum pump units that utilize green energy, in order to solve the problems of high steam consumption of vacuum pumps and interference caused by high water temperature in summer.

[0006] This invention adopts the following technical solution: a system of a composite steam jet vacuum pump unit utilizing green energy, comprising:

[0007] A vacuum crystallizer, equipped with an air outlet, stores the material to be purified.

[0008] The first condenser, equipped with a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet, is used to condense and unload condensable gases from the mixed gas in the vacuum crystallizer.

[0009] Its primary inlet is connected to the outlet of the vacuum crystallizer via a pipe.

[0010] Its secondary inlet is connected to the cooling water system via a pipe.

[0011] The second jet pump has a steam inlet, a mixed gas inlet, and a mixed gas outlet. Its steam inlet is connected to the outlet of the steam system, and its mixed gas inlet is connected to the primary side outlet of the first condenser.

[0012] The second condenser, having a primary inlet, a primary outlet, a secondary inlet, and a secondary outlet, is used to condense and unload the condensable gas in the mixed gas drawn out and fed into it by the second jet pump.

[0013] Its primary inlet is connected to the mixed gas outlet of the second injection pump via a pipeline.

[0014] Its secondary inlet is connected to the cooling water system via a pipe.

[0015] The third jet pump has a steam inlet, a mixed gas inlet, and a mixed gas outlet. Its steam inlet is connected to the outlet of the steam system, and its mixed gas inlet is connected to the primary side outlet of the second condenser.

[0016] The third condenser, equipped with a primary inlet, a primary outlet, a secondary inlet, and a secondary outlet, is used to condense and unload the condensable gases in the mixed gas mixture drawn out and fed into it by the third jet pump.

[0017] Its primary inlet is connected to the mixed gas outlet of the third jet pump via a pipeline.

[0018] Its secondary inlet is connected to the cooling water system via a pipe.

[0019] Its primary side outlet is connected to the outside via a pre-vacuum pump.

[0020] The cooling water system is a natural water source, a cooling tower, or refrigeration equipment, and the water supply temperature is 1.0-15.0 degrees Celsius.

[0021] Furthermore, it also includes:

[0022] The first jet pump is equipped with a steam inlet, a mixed gas inlet, and a mixed gas outlet.

[0023] Its steam inlet is connected to the outlet of the steam system.

[0024] Its mixed gas inlet is connected to the gas outlet of the vacuum crystallizer.

[0025] Its mixed gas outlet is connected to the primary side inlet of the first condenser.

[0026] The cooling water system uses natural water sources, cooling towers, or refrigeration equipment, and the water supply temperature is 15.1-32.0 degrees Celsius.

[0027] Furthermore, it also includes:

[0028] The steam distributor has an inlet and multiple distribution ports for connecting to the steam ports of the first jet pump, the second jet pump, and the third jet pump via pipes.

[0029] Furthermore, it also includes:

[0030] The hot water tank has its inlet connected to the secondary outlets of the first condenser, second condenser, and third condenser via pipes, and its outlet connected to the inlet of the cooling tower via pipes.

[0031] Furthermore, it also includes:

[0032] The heat exchanger has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet.

[0033] Its primary inlet is connected to the outlet of a natural water source via a pipe.

[0034] Its primary outlet is connected to the inlet of a natural water source via a pipe.

[0035] Its secondary inlet is connected to the outlet of the hot water tank via a pipe.

[0036] The water distribution manifold has its inlet connected to the secondary side outlet of the heat exchanger via a pipe, and its outlet connected to the secondary side inlets of the first condenser, second condenser, and third condenser via pipes.

[0037] The beneficial effects of this invention are: This invention can utilize natural water sources to reduce steam consumption. Through different working combinations of the ejector and condenser, the vacuum pump can switch between two mathematical calculation models for low-temperature and medium-temperature water sources, thereby maximizing the utilization of green cold energy under different seasons and water temperature conditions, greatly reducing steam consumption and lowering costs. Under low-temperature conditions of 1.0-15.0 degrees Celsius, it can save up to 85-90% of steam consumption. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the present invention.

[0039] The components are: 1. First jet pump; 2. First condenser; 3. Second jet pump; 4. Second condenser; 5. Third jet pump; 6. Third condenser; 7. Fore-vacuum pump; 8. Water distributor; 9. Natural water source; 10. Cooling tower; 11. Hot water tank; 12. Vacuum crystallizer; 13. Steam distributor; 14. Heat exchanger. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0041] This invention discloses a system for a composite steam jet vacuum pump unit utilizing green energy, such as... Figure 1As shown, it includes a vacuum crystallizer 12, a first condenser 2, a second jet pump 3, a second condenser 4, a third jet pump 5, and a third condenser 6. The vacuum crystallizer 12 has an outlet, and the vacuum crystallizer 12 stores the material to be purified.

[0042] The first condenser 2 has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet. The first condenser 2 is used to condense and unload the condensable gas in the mixed gas in the vacuum crystallizer 12. The primary side inlet of the first condenser 2 is connected to the gas outlet of the vacuum crystallizer 12 through a pipe, and the secondary side inlet of the first condenser 2 is connected to the cooling water system through a pipe.

[0043] The second jet pump 3 has a steam inlet, a mixed gas inlet, and a mixed gas outlet. The steam inlet of the second jet pump 3 is connected to the outlet of the steam system, and the mixed gas inlet of the second jet pump 3 is connected to the primary side outlet of the first condenser 2.

[0044] The second condenser 4 has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet. The second condenser 4 is used to condense and unload the condensable gas in the mixed gas drawn out and sent into it by the second jet pump 3.

[0045] The primary inlet of the second condenser 4 is connected to the mixed gas outlet of the second jet pump 3 via a pipe, and the secondary inlet of the second condenser 4 is connected to the cooling water system via a pipe.

[0046] The third jet pump 5 has a steam inlet, a mixed gas inlet, and a mixed gas outlet. The steam inlet of the third jet pump 5 is connected to the outlet of the steam system, and the mixed gas inlet of the third jet pump 5 is connected to the primary side outlet of the second condenser 4.

[0047] The third condenser 6 has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet. The third condenser 6 is used to condense and unload the condensable gas in the mixed gas drawn out and sent into it by the third jet pump 5.

[0048] The primary inlet of the third condenser 6 is connected to the mixed gas outlet of the third jet pump 5 via a pipe, the secondary inlet of the third condenser 6 is connected to the cooling water system via a pipe, and the primary outlet of the third condenser 6 is connected to the outside via a vacuum circulation pump.

[0049] The essence of using a condenser is to increase condensate consumption in exchange for savings in working steam, trading cheaper water for more expensive steam, thus reducing pump operating costs. The cooling water system is supplied by a natural water source 9 or by a cooling tower 10, with a water temperature of 1.0-15.0 degrees Celsius. In case of abnormal climate changes, refrigeration equipment is used to supplement, regulate, or lower the cooling water temperature.

[0050] In winter and spring, the water temperature of natural water source 9, such as rivers, lakes, and reservoirs, is 1.0-15.0 degrees Celsius. Its mathematical calculation model and design theory are divided into a low-temperature mathematical calculation model based on the inlet water temperature of 1.0-15.0 degrees Celsius. At this time, the water from natural water source 9 is used as cooling water to enter the secondary side inlet of the first condenser 2, the second condenser 4, and the third condenser 6 for cooling and unloading. Since the power and load of the first condenser 2 are very large, the first condenser 2 can use the low-temperature water of 1.0-15.0 degrees Celsius to pre-cool the condensable gas entering it and unload a part of the condensable gas. Then, under the suction of the second jet pump 3, it enters the second condenser 4 for unloading again. Thus, under the low water temperature, the vacuum degree requirements and purification requirements of the vacuum crystallizer 12 are met. In this mode, 85-90% of the steam can be saved.

[0051] The present invention also includes: a first jet pump 1, the first jet pump 1 having a steam port, a mixed gas inlet and a mixed gas outlet, the steam port of the first jet pump 1 being connected to the outlet of the steam system, the mixed gas inlet of the first jet pump 1 being connected to the outlet of the vacuum crystallizer 12, and the mixed gas outlet of the first jet pump 1 being connected to the primary side inlet of the first condenser 2.

[0052] Under the action of the first jet pump 1, the mixed steam enters the first condenser 2. The condensable gas is cooled by the cooling water from the water distributor 8 and outputs from the bottom of the first condenser 2, then enters the second jet pump 3 and the second condenser 4, and finally enters the third jet pump 5 and the third condenser 6, before finally entering the forepump 7 and being discharged into the atmosphere. In the steam system, the steam from the steam distributor 13 is input into the steam distributor and sent to the first jet pump 1, the second jet pump 3, and the third jet pump 5 respectively. After doing work, it enters the corresponding condenser as exhaust gas.

[0053] The cooling water system is supplied by natural water source 9 or cooling tower 10, and the water temperature is 15.1-32.0 degrees. Its mathematical calculation model and design theory are divided into medium temperature mathematical calculation model according to the inlet water temperature of 15.1-32.0℃. In the cooling water system, the medium temperature water from the usable green energy system is input into the first condenser 2, the second condenser 4 and the third condenser 6 through the water distribution package 8 for condensation and washing, so that condensable gas and cooling water are mixed and output, and non-condensable waste gas is discharged into the atmosphere in stages.

[0054] In summer and autumn, the water from natural water sources 9, such as rivers, lakes, and reservoirs, is between 15.1 and 32.0°C. At this time, the water from natural water sources 9 is used as cooling water and enters the secondary inlet of the first condenser 2, the second condenser 4, and the third condenser 6 for cooling and unloading. Since the power and load of the first condenser 2 are very large and it is matched with the first jet pump 1, with both the first jet pump 1 and the first condenser 2 participating, the first condenser 2 unloads a large amount of condensable gas input to the first condenser 2 through the first jet pump 1. Thus, the vacuum degree requirements and purification requirements of the vacuum crystallizer 12 are met at a higher water temperature. In this mode, 35-70% of the steam can be saved.

[0055] In addition to summer, cooling tower 10 can also obtain low-temperature water at 5-20℃. After testing, it was found that in the existing technology, the working steam pressure of the jet pump needs to be matched with the cooling water temperature of the condenser. The cooling water temperature of the condenser is generally required to be around 32 degrees. When the cooling water inlet temperature is 32℃, the steam consumption of the vacuum pump is 2400 kg / h. However, the cooling water inlet temperature of the present invention is 20℃, which saves 50% of the steam consumption to 1200 kg / h. When the cooling water inlet temperature of the present invention is 10℃, the steam consumption is about 300 kg / h, saving 85-90% of the steam consumption. The energy saving and consumption reduction effect is excellent.

[0056] The present invention also includes a steam distributor 13, which has an inlet and multiple distribution ports, and is used to connect to the steam ports of the first jet pump 1, the second jet pump 3, and the third jet pump 5 via pipes.

[0057] The invention also includes a hot water tank 11, the inlet of which is connected to the secondary outlets of the first condenser 2, the second condenser 4, and the third condenser 6 via pipes, and the outlet of the hot water tank 11 is connected to the inlet of the cooling tower 10 via a pipe for circulation. The outlet of the hot water tank 11 is also connected to a heat-using terminal via a pipe. By connecting the hot water tank 11 to the heat-using terminal, energy consumption can be saved and costs reduced.

[0058] The present invention also includes: a heat exchanger 14 and a water distribution tank 8. The heat exchanger 14 has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet. The primary side inlet of the heat exchanger 14 is connected to the outlet of the natural water source 9 through a pipe. The primary side outlet of the heat exchanger 14 is connected to the inlet of the natural water source 9 through a pipe. The secondary side inlet of the heat exchanger 14 is connected to the outlet of the hot water tank 11 through a pipe.

[0059] The inlet of water distributor 8 is connected to the secondary side outlet of heat exchanger 14 via a pipe, and the outlet of water distributor 8 is connected to the secondary side inlet of the first condenser 2, the second condenser 4, and the third condenser 6 via a pipe.

[0060] The mathematical calculation model of the vacuum pump of the present invention has an inlet water temperature of 1.0-32.0℃, preferably a low temperature mathematical calculation model of 1.0-15.0℃. The vacuum pump unit of the present invention has the characteristics of low energy consumption, small process variation, low failure rate, and stable vacuum degree and pumping volume, and can replace the existing high temperature mathematical calculation model vacuum pump.

[0061] Example 1

[0062] A certain factory's titanium dioxide vacuum crystallizer 12 requires a vacuum degree of 930Pa, an air extraction rate of 30kg / h for non-condensable gas and 820kg / h for condensable gas, totaling 850kg / h. The existing technology used has a cooling water temperature of 32 degrees Celsius, a water consumption of 400t / h, a steam requirement of 2.4t / h for the jet pump group, and a steam price of 157 yuan / ton.

[0063] This invention is installed to meet the requirements of the factory's vacuum crystallizer 12.

[0064] When the water temperature of natural water source 9 is 20 degrees, first turn on the first condenser 2, the second condenser 4, and the third condenser 6, and then turn on the first jet pump 1, the second jet pump 3, and the third jet pump 5. At this time, the total steam consumption of the first jet pump 1, the second jet pump 3, and the third jet pump 5 is 1.2 t / h, and the water consumption is 200 t / h.

[0065] As shown in Table 1, when the water temperature of natural water source 9 is 10 degrees, the first condenser 2, the second condenser 4, and the third condenser 6 are turned on first, and then the second jet pump 3 and the third jet pump 5 are turned on. At this time, the total steam consumption of the second jet pump 3 and the third jet pump 5 is 300 kg / h, and the water consumption is 100 t / h.

[0066] As shown in Table 1, compared with the existing technology, the plant saves 50% of steam when the inlet water temperature is 20 degrees Celsius, and saves 87.5% of steam when the inlet water temperature is 10 degrees Celsius.

[0067] Therefore, when the inlet water temperature is 20 degrees Celsius, 188.4 yuan / h is saved, and when the inlet water temperature is 10 degrees Celsius, 329.7 yuan / h is saved.

[0068] Table 1

[0069]

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for a composite steam jet vacuum pump unit utilizing green energy, characterized in that, include: The vacuum crystallizer (12) has an air outlet and stores the material to be purified. The first condenser (2) has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet, and is used to condense and unload the condensable gas in the mixed gas in the vacuum crystallizer (12). Its primary inlet is connected to the outlet of the vacuum crystallizer (12) via a pipe. Its secondary inlet is connected to the cooling water system via a pipe. The second jet pump (3) has a steam inlet, a mixed gas inlet, and a mixed gas outlet. Its steam inlet is connected to the outlet of the steam system, and its mixed gas inlet is connected to the primary side outlet of the first condenser (2). The second condenser (4) has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet, and is used to condense and unload the condensable gas in the mixed gas drawn out and fed into it by the second jet pump (3). Its primary inlet is connected to the mixed gas outlet of the second jet pump (3) via a pipeline. Its secondary inlet is connected to the cooling water system via a pipe. The third jet pump (5) has a steam inlet, a mixed gas inlet, and a mixed gas outlet. Its steam inlet is connected to the outlet of the steam system, and its mixed gas inlet is connected to the primary side outlet of the second condenser (4). The third condenser (6) has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet, and is used to condense and unload the condensable gas in the mixed gas drawn out and fed into it by the third jet pump (5). Its primary inlet is connected to the mixed gas outlet of the third jet pump (5) via a pipeline. Its secondary inlet is connected to the cooling water system via a pipe. Its primary outlet is connected to the outside via a pre-vacuum pump (7). Also includes: The first jet pump (1) is equipped with a steam inlet, a mixed gas inlet, and a mixed gas outlet. Its steam inlet is connected to the outlet of the steam system. Its mixed gas inlet is connected to the outlet of the vacuum crystallizer (12). Its mixed gas outlet is connected to the primary side inlet of the first condenser (2). The cooling water system is a natural water source (9), a cooling tower (10) or a refrigeration equipment. By using different working combinations of jet pumps and condensers, it can switch between two mathematical calculation models for low-temperature and medium-temperature water sources. When the water supply temperature is 1.0-15.0 degrees, it is divided into a low temperature mathematical calculation model according to the inlet water temperature. The cooling water enters the secondary side inlet of the first condenser (2), the second condenser (4), and the third condenser (6) for cooling and unloading. When the water supply temperature is 15.1-32.0 degrees, the medium temperature mathematical calculation model is divided according to the inlet water temperature. The cooling water enters the secondary side inlet of the first condenser (2), the second condenser (4), and the third condenser (6) for cooling and unloading. The first jet pump (1) and the first condenser (2) both participate. The first condenser (2) unloads a large amount of condensable gas input to the first condenser (2) through the first jet pump (1).

2. The system of a composite steam jet vacuum pump unit utilizing green energy according to claim 1, characterized in that, Also includes: The steam distributor (13) has an inlet and multiple distribution ports for connecting to the steam ports of the first jet pump (1), the second jet pump (3), and the third jet pump (5) via pipes.

3. The system of a composite steam jet vacuum pump unit utilizing green energy according to claim 1 or 2, characterized in that, Also includes: The hot water tank (11) has its inlet connected to the secondary outlets of the first condenser (2), the second condenser (4), and the third condenser (6) via pipes, and its outlet connected to the inlet of the cooling tower (10) via pipes.

4. The system of a composite steam jet vacuum pump unit utilizing green energy according to claim 3, characterized in that, Also includes: The heat exchanger (14) has a primary side inlet, a primary side outlet, a secondary side inlet, and a secondary side outlet. Its primary inlet is connected to the outlet of the natural water source (9) via a pipe. Its primary outlet is connected to the inlet of the natural water source (9) via a pipe. Its secondary inlet is connected to the outlet of the hot water tank (11) via a pipe. The water distribution tank (8) has its inlet connected to the secondary side outlet of the heat exchanger (14) via a pipe, and its outlet connected to the secondary side inlet of the first condenser (2), the second condenser (4), and the third condenser (6) via a pipe.

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