Secondary steam heat energy recovery system

Abstract

A secondary steam heat energy recovery system comprises a secondary steam inlet pipeline. A water inlet line; a hot water circulation line; the heat recovery tank group comprises a heat recovery tank a, a heat recovery tank b and a heat recovery tank c, and steam inlets, water inlets and circulating hot water inlets in the heat recovery tank a, the heat recovery tank b and the heat recovery tank c are connected to a secondary steam inlet pipeline, a water inlet pipeline and a hot water circulating pipeline through a plurality of branch pipes with control valves respectively; hot water outlet pipes on the heat recovery tank a, the heat recovery tank b and the heat recovery tank c are respectively connected with a hot water circulating branch pipe, a hot water output branch pipe and a cleaning and sewage discharging branch pipe; the hot water circulating branch pipe is connected with a hot water circulating pipeline; and non-condensable gas outlets on the heat recovery tank a, the heat recovery tank b and the heat recovery tank c are connected to a non-condensable gas pipeline through non-condensable gas branch pipes. The energy-saving heat recovery system has the advantages that the energy of an enterprise is saved while steam waste is avoided, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam heat energy recovery, in particular to a secondary steam heat energy recovery system. Background Art

[0002] In the pharmaceutical industry, when extracting Chinese medicinal materials in the extraction tank, a large amount of secondary steam is often generated. Whether the waste heat of secondary steam can be recycled is the key to saving energy and improving economic benefits. The existing steam recovery systems on the market often have poor recycling rates, a single reuse direction, large heat loss, and easily cause waste of steam resources. Utility Model Content

[0003] The purpose of the utility model is to provide a secondary steam heat recovery system to address the above-mentioned deficiencies.

[0004] The utility model comprises

[0005] Secondary steam inlet pipeline;

[0006] Water inlet pipeline;

[0007] Hot water circulation pipeline;

[0008] A heat recovery tank group, comprising a heat recovery tank a, a heat recovery tank b and a heat recovery tank c, wherein the steam inlet, the water inlet and the circulating hot water inlet on the heat recovery tank a, the heat recovery tank b and the heat recovery tank c are respectively connected to a secondary steam inlet pipeline, a water inlet pipeline and a hot water circulation pipeline through a plurality of branch pipes with control valves; the hot water outlet pipes on the heat recovery tank a, the heat recovery tank b and the heat recovery tank c are respectively connected to a hot water circulation branch pipe, a hot water output branch pipe and a cleaning and sewage branch pipe; the hot water circulation branch pipe is connected to the hot water circulation pipeline; the non-condensable gas outlets on the heat recovery tank a, the heat recovery tank b and the heat recovery tank c are connected to the non-condensable gas pipeline through a non-condensable steam branch pipe;

[0009] The main condenser has its liquid inlet connected to the hot water circulation pipeline and its steam inlet connected to the non-condensable steam pipeline;

[0010] The vacuum condenser group a and the standby vacuum condenser group b both include a pair of vacuum condensers connected in series, the steam inlets of the vacuum condenser group a and the standby vacuum condenser group b are connected to the steam outlet of the main condenser, and the liquid inlets of the vacuum condenser group a and the standby vacuum condenser group b are connected to the liquid outlet of the main condenser; the steam outlets of the vacuum condenser group a and the standby vacuum condenser group b are connected to the vacuum pump through the steam outlet pipeline, and the liquid outlets of the vacuum condenser group a and the standby vacuum condenser group b are connected to the hot water circulation pipeline;

[0011] The hot water outlet pipeline is connected to the hot water output branch pipes on the heat recovery tank a, the heat recovery tank b and the heat recovery tank c.

[0012] Preferably, the hot water circulation branch pipe and the hot water output branch pipe are both provided with control valves.

[0013] Preferably, heat exchangers are provided in the heat recovery tank a, the heat recovery tank b and the heat recovery tank c.

[0014] Preferably, a water circulation pump is also provided on the hot water circulation pipeline in front of the liquid inlet of the main condenser.

[0015] Preferably, a hot water delivery pump is also provided on the hot water outlet pipeline.

[0016] The utility model has the advantages of avoiding steam waste and saving enterprise energy and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", etc. appear in the description of the present utility model, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As shown in the accompanying drawings, the utility model includes

[0023] Secondary steam inlet pipeline 1;

[0024] Water inlet line 2;

[0025] Hot water circulation pipeline 3;

[0026] A heat recovery tank group, comprising a heat recovery tank a11, a heat recovery tank b12 and a heat recovery tank c13, wherein the steam inlet, the water inlet and the circulating hot water inlet on the heat recovery tank a11, the heat recovery tank b12 and the heat recovery tank c13 are respectively connected to a secondary steam inlet pipeline 1, a water inlet pipeline 2 and a hot water circulation pipeline 3 through a plurality of branch pipes with control valves; the hot water outlet pipe 15 on the heat recovery tank a11, the heat recovery tank b12 and the heat recovery tank c13 are respectively connected to a hot water circulation branch pipe 16, a hot water output branch pipe 17 and a cleaning and sewage branch pipe 18; the hot water circulation branch pipe 16 is connected to the hot water circulation pipeline 3; the non-condensable gas outlets on the heat recovery tank a11, the heat recovery tank b12 and the heat recovery tank c13 are connected to a non-condensable gas pipeline 19 through a non-condensable gas branch pipe;

[0027] The main condenser 14 has its liquid inlet connected to the hot water circulation pipeline 3 and its steam inlet connected to the non-condensable steam pipeline 19;

[0028] The vacuum condenser group a20 and the standby vacuum condenser group b21 both include a pair of vacuum condensers connected in series, the steam inlets of the vacuum condenser group a20 and the standby vacuum condenser group b21 are connected to the steam outlet of the main condenser 14, and the liquid inlets of the vacuum condenser group a20 and the standby vacuum condenser group b21 are connected to the liquid outlet of the main condenser 14; the steam outlets of the vacuum condenser group a20 and the standby vacuum condenser group b21 are connected to the vacuum pump 22 through the steam outlet pipeline, and the liquid outlets of the vacuum condenser group a20 and the standby vacuum condenser group b21 are connected to the hot water circulation pipeline 3;

[0029] The hot water outlet pipeline 4 is connected to the hot water output branch pipes 17 on the heat recovery tank a11, the heat recovery tank b12 and the heat recovery tank c13.

[0030] In another technical solution, both the hot water circulation branch pipe 16 and the hot water output branch pipe 17 are provided with control valves.

[0031] In another technical solution, the heat recovery tank a11, the heat recovery tank b12 and the heat recovery tank c13 are provided with a heat exchanger and a condensed water discharge pipe for discharging secondary steam condensed water.

[0032] In another technical solution, a water circulation pump 23 is further provided on the hot water circulation pipeline 3 in front of the liquid inlet of the main condenser 14 .

[0033] In another technical solution, a hot water delivery pump 24 is also provided on the hot water outlet pipeline 4 .

[0034] Working method: The three heat recovery tanks of the heat recovery tank group are set in parallel. The use process of heat recovery tank a11, heat recovery tank b12 and heat recovery tank c13 is divided into three steps:

[0035] 1. Water replenishment. Taking the heat recovery tank a11 as an example, the control valve corresponding to the water inlet pipeline 2 is opened, and the water replenishment control valve is closed after the water is manually replenished to the target liquid level. If it is forgotten, the water replenishment valve will automatically close when the liquid level reaches the upper limit, and the water replenishment will stop;

[0036] 2. Heat recovery tank a11 circulates and absorbs secondary steam. Taking heat recovery tank a11 as an example, the control valve of the hot water circulation branch pipe 16 is opened, the control valves on the main condenser 14 and the vacuum condenser group a20 (when the vacuum condenser group a20 needs maintenance, it is replaced by the spare vacuum condenser group b21) are opened, and the control valve for return water on the hot water circulation pipeline 3 is also opened, and then the water circulation pump 23 is started, and the hot water circulation is established. After the hot water circulation is established, the control valve of the secondary steam inlet pipeline 1 is opened to recover the secondary steam until the heat recovery tank a11 reaches the upper limit of 60°C, and the control valve is closed to stop the hot water circulation.

[0037] 3. Drain the liquid, open the control valve of the hot water output branch pipe 17 and the valves on the hot water outlet pipeline 4, start the hot water delivery pump 24, and deliver the hot water in the heat recovery tank a11 to the hot water use pipeline until the liquid level in the heat recovery tank a11 reaches the lower limit.

[0038] The heat recovery tank a11, the heat recovery tank b12 and the heat recovery tank c13 are three tanks that operate alternately. The first tank is in the water replenishment state, the second tank is in the hot water circulation heat absorption state, and the third tank is in the liquid use state. In different states, the corresponding control valves remain open and closed accordingly.

[0039] The above implementation cases are only for illustrating the technical solutions and features of the utility model, and their purpose is to enable people familiar with the technology to implement them better. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model are within the protection scope of the utility model, and those not described in detail are prior art.

Claims

1. A secondary steam heat recovery system, characterized in that: It includes Secondary steam inlet pipeline (1); Water inlet line (2); Hot water circulation pipeline (3); A heat recovery tank group, comprising a heat recovery tank a (11), a heat recovery tank b (12) and a heat recovery tank c (13); the steam inlet, the water inlet and the circulating hot water inlet on the heat recovery tank a (11), the heat recovery tank b (12) and the heat recovery tank c (13) are respectively connected to a secondary steam inlet pipeline (1), a water inlet pipeline (2) and a hot water circulation pipeline (3) through a plurality of branch pipes with control valves; the hot water outlet pipes (15) on the heat recovery tank a (11), the heat recovery tank b (12) and the heat recovery tank c (13) are respectively connected to a hot water circulation branch pipe (16), a hot water output branch pipe (17) and a cleaning sewage branch pipe (18); the hot water circulation branch pipe (16) is connected to the hot water circulation pipeline (3); the non-condensable gas outlets on the heat recovery tank a (11), the heat recovery tank b (12) and the heat recovery tank c (13) are connected to a non-condensable gas pipeline (19) through a non-condensable gas branch pipe; A main condenser (14), whose liquid inlet is connected to the hot water circulation pipeline (3) and whose steam inlet is connected to the non-condensable steam pipeline (19); The vacuum condenser group a (20) and the standby vacuum condenser group b (21) both comprise a pair of vacuum condensers connected in series, the steam inlets of the vacuum condenser group a (20) and the standby vacuum condenser group b (21) being connected to the steam outlet of the main condenser (14), and the liquid inlets of the vacuum condenser group a (20) and the standby vacuum condenser group b (21) being connected to the liquid outlet of the main condenser (14); the steam outlets of the vacuum condenser group a (20) and the standby vacuum condenser group b (21) being connected to a vacuum pump (22) via steam outlet pipes, and the liquid outlets of the vacuum condenser group a (20) and the standby vacuum condenser group b (21) being connected to a hot water circulation pipeline (3); A hot water outlet pipeline (4) is connected to the hot water output branch pipes (17) on the heat recovery tank a (11), the heat recovery tank b (12) and the heat recovery tank c (13).

2. A secondary steam heat recovery system according to claim 1, characterized in that: The hot water circulation branch pipe (16) and the hot water output branch pipe (17) are both provided with control valves.

3. A secondary steam heat recovery system according to claim 1, characterized in that: Heat exchangers are provided in the heat recovery tank a (11), the heat recovery tank b (12) and the heat recovery tank c (13).

4. A secondary steam heat recovery system according to claim 1, characterized in that: A water circulation pump (23) is also provided on the hot water circulation pipeline (3) in front of the liquid inlet of the main condenser (14).

5. A secondary steam heat recovery system according to claim 1, characterized in that: The hot water outlet pipeline (4) is also provided with a hot water delivery pump (24).

Images