Multi-rectifying-tower water supply system
By automatically adjusting the cooling water flow rate through a temperature difference transmitter and a variable frequency circulating water pump system, the problem of uneven condenser arrangement in the multi-distillation tower water supply system is solved, achieving efficient distribution of cooling water and energy-saving operation.
Patent Information
- Application Number
- CN202423174721.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In existing multi-distillation column water supply systems, the uneven cooling water supply caused by the different heights of the condensers leads to excessive energy consumption and unstable conditions within the columns, making it difficult to achieve energy saving and stable operation.
The system employs a temperature difference transmitter and a variable frequency circulating water pump system. The valve opening is controlled by the temperature difference between the inlet and outlet water of the condenser, and the cooling water flow is automatically adjusted to ensure that each condenser receives sufficient cooling water. The circulating water pump is controlled by a variable frequency to meet the needs of different condensers.
It achieves efficient distribution of cooling water, reduces energy consumption, improves operational stability, avoids material loss, and complies with the principle of energy conservation.
Smart Images
Figure CN223628109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a water supply system, concretely relates to a multi rectifying tower water supply system. BACKGROUND
[0002] For small and medium-sized solvent purification enterprises, the arrangement of the overhead condensers of the multi rectifying tower is high or low, far or near, the supply and balance of the cooling water have great influence on product quality, stable operation condition and energy saving and many other aspects, under the condition that the total pipe pressure (P1) of the inlet water (CWS) is constant, the total pipe pressure (P0) of the return water (CWR) is mainly formed by the cooling tower and the pipe resistance, and the inlet pressure of the condenser (Ei) is influenced by the installation height and the pipe resistance.
[0003] The overhead condenser of the rectifying tower is responsible for the cooling task of the overhead gas phase, and the cooling water consumption is one of the more important parameters in the rectifying operation, for the enterprises with more rectifying towers, the power load required by the cooling water circulation is a considerable expenditure. The lift of the water supply pump should meet the requirement that the condenser placed at the highest position and farthest away can obtain the necessary cooling water, and the unlimited supply of the cooling water will lead to the following problems: the energy consumption is too large, which does not conform to the energy saving principle, and the cost rises; the excessive supply of the cooling water of the condenser will lead to the instability of the tower, usually, the large-power water pump is provided with a frequency converter, and the unlimited supply of the cooling water does not conform to the energy saving principle, and the total amount of the circulating water is controlled under the premise of ensuring the total pipe pressure. SUMMARY
[0004] In order to overcome the defects of the prior art, the utility model provides a multi rectifying tower water supply system.
[0005] The utility model adopts the following technical scheme: a multi rectifying tower water supply system, which comprises a circulating water pump, a circulating water pool, a cooling tower and a plurality of condensers. The cooling tower is arranged above the circulating water pool, the hot water outlet of the condenser naturally flows into the circulating water pool after being cooled and cooled by the cooling tower, one side of the circulating water pool is provided with a circulating component as a circulating part, a temperature difference transmitter is arranged on the inlet and outlet pipes of the condenser, the temperature difference transmitter transmits a temperature difference signal to a control module in a control chamber, and the control module in the control chamber sends an instruction to an adjusting valve to adjust the water quantity.
[0006] A conveying pipe for water source conveying is arranged on the circulating water pool, a circulating component for water source circulation is arranged on one side of the conveying pipe, the circulating component is a circulating water pump, and the circulating water pump is responsible for the supply of the cooling water of all the condensers.
[0007] The circulating water pump adopts frequency control technology, guarantees that the water supply main pipe pressure meets the highest and farthest condenser water demand, one side of the circulating water pump is assembled and connected with the conveying pipe, and the other side of the circulating water pump is assembled with the water inlet pipe to take water from the circulating water pool.
[0008] Compared with the prior art, the utility model discloses the temperature difference of condenser inlet and outlet as variable, and the valve opening degree is controlled, the cooling water consumption of low and near condenser is controlled, and enough cooling water can be obtained for high and far condenser.When the processing variety of rectifying tower is determined, the corresponding temperature difference range of inlet and outlet can be set. When the temperature difference is small, the flow is too large, and the temperature difference signal automatically controls the regulating valve to reduce the opening degree and reduce the flow. For intermittent operation, when there is no gas in the tower top into the condenser, the temperature difference is almost zero, and the temperature difference signal controls the regulating valve to close. When the rectifying tower processes the gasification latent heat of high variety, the temperature difference of inlet and outlet is large, and the temperature difference signal can control the regulating valve to increase the opening degree to increase the flow. The temperature difference signal controls the cooling water flow, without manual intervention. For low boiling point variety, the temperature difference setting range is reduced by 0.5-1 DEG C, to provide more cooling water, reduce the influence of condensing efficiency reduction, and avoid material loss. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 It is a schematic diagram of the existing conventional control system;
[0010] Figure 2 It is the improved schematic diagram of the utility model according to the conventional control system;
[0011] In the drawing: 1 is a circulating water pool, 2 is a cooling tower, 3 is a conveying pipe, 4 is a condenser, 5 is a circulating water pump, 6 is a water inlet pipe, 7 is a water outlet pipe, 8 is a temperature difference transmitter, 9 is a control module in the control room, and 10 is a regulating valve. DETAILED DESCRIPTION
[0012] Next, the utility model is further described in combination with the drawings and specific embodiments, and it should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.
[0013] A multi-rectifying tower water supply system, comprising a condenser 4 and a circulating water pool 1, one side of the circulating water pool 1 is provided with a plurality of condensers 4, the condenser 4 is provided with a water inlet pipe 6 and a water outlet pipe 7, the circulating water pool 1 is provided with a cooling component, the cooling component for cooling the circulating water pool 1 adopts a cooling tower 2, one side of the circulating water pool 1 is provided with a circulating component, the condenser 4 is provided with a temperature difference transmitter 8, the temperature difference transmitter 8 collects a temperature difference signal, the temperature difference signal is transmitted to a control module 9 in a control room, and the control module 9 in the control room sends an instruction to a regulating valve 10.
[0014] With the temperature difference between the inlet and outlet water of the condenser 4 as a variable, and with the valve opening degree controlled thereby, the cooling water used by the low-position, near-by condenser is controlled, and the high-position, far-away condenser can also obtain sufficient cooling water, when the processing variety of the rectifying tower is determined, the corresponding temperature difference range between the inlet and outlet water can be set. When the temperature difference is small, it indicates that the flow is too large, and the temperature difference signal automatically controls the regulating valve to reduce the opening degree and thereby reduce the flow. For intermittent operation, when there is no gas entering the condenser 4 from the top of the tower, the temperature difference is almost zero, and the temperature difference signal controls the regulating valve 10 to be closed. When the rectifying tower processes a variety with high latent heat of vaporization, the temperature difference between the inlet and outlet water becomes large, and the temperature difference signal can control the regulating valve to increase the opening degree to increase the flow, without manual intervention. For low-boiling-point varieties, the temperature difference setting range is reduced by 0.5-1℃, to provide more cooling water and reduce the impact of the decrease in condensing efficiency, and to avoid material loss.
[0015] The circulating water tank 1 is provided with a conveying pipe 3 for water source conveying, one side of the conveying pipe 3 is provided with a circulating component for water source circulation, the circulating component is a circulating water pump 5, the circulating water pump 5 is a variable frequency control circulating water pump, one side of the circulating water pump 5 is assembled and connected with the conveying pipe 3, and the other side of the circulating water pump 5 is assembled and connected with a water inlet pipe 6.
[0016] The above embodiment is only the preferred embodiment of the present application, and cannot be used to limit the scope of protection of the present application, and any non-substantial changes and replacements made by the person skilled in the art on the basis of the present application all belong to the scope of protection of the present application.
Claims
1. A multi-distillation column water supply system, comprising condensers and a circulating water tank, wherein multiple condensers are arranged on one side of the circulating water tank, cooling components are arranged on the circulating water tank, the cooling components for cooling the circulating water tank are cooling towers, and a circulation component is arranged on one side of the circulating water tank, characterized in that: The temperature difference signal of the temperature difference transducer is collected by measuring the inlet and outlet water temperature of the condenser, and is transmitted to the control module in the control room, which sends instructions to the regulating valve.
2. A multi-column water supply system according to claim 1, characterized in that: The water source conveying pipe is arranged on one side of the conveying pipe, and the circulating component is a circulating water pump.
3. A multi-column water supply system according to claim 2, wherein: The circulating water pump adopts a variable frequency control technology, and is assembled and connected with the conveying pipe on one side and the water inlet pipe on the other side.