Method and equipment for disinfecting water used in slaughter and dehairing

Abstract

The invention relates to a method for disinfecting water for slaughtering and depilation in the field of slaughtering. The method comprises the following steps: a compressor is used to compress and heat water vapor; the heated water vapor enters a condenser, and the water for slaughtering and depilation is heated and disinfected; the heated and disinfected hot water flows back to a hot water pool, completing a disinfection procedure; the water disinfected at high temperature is passed into a flash evaporator for cooling and then enters a water outlet pool; secondary steam generated by flash evaporation is pressurized by a compressor and then used to heat and disinfect the water for slaughtering and depilation; the equipment of the invention comprises the following steps: a steam inlet and a steam outlet of the compressor are respectively connected to the flash evaporator and the condenser; the condenser and the water inlet pool are connected through a left circulation pump; the bottom of the condenser is connected to the hot water pool; the hot water pool and the upper part of the water inlet pool are connected; the flash evaporator and the hot water pool are connected through a right circulation pump; and the bottom of the flash evaporator is connected to the water outlet pool; the heat released by cooling the disinfected hot water provides a heat source for disinfecting the depilation water, thereby reducing the energy consumption of the disinfecting water by more than 60%, and having great promotion and application value.

Description

Technical Field

[0001] The present invention relates to the field of disinfection technology and equipment manufacturing for depilatory water in the slaughtering industry, and in particular to a method and equipment for disinfecting depilatory water for slaughtering. Background Art

[0002] The water used for dehairing in livestock slaughterhouses requires a temperature of around 62°C. To kill viruses, the water temperature must be raised to above 82°C, held for a specified period, then cooled and returned to the slaughter line for recycling. The current common method involves steam heating to above 82°C for disinfection, followed by cooling back to around 62°C. Both heating and cooling processes consume energy, and some slaughterhouses, to save energy, skip disinfection altogether. This can easily transmit bacteria and viruses from livestock to humans, causing widespread infection and even death. This poses a significant risk to food safety and requires a thorough solution. Summary of the Invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a method and equipment for disinfecting water used in slaughtering and depilating.

[0004] The technical solution used in the present invention is as follows:

[0005] A method for disinfecting water used for slaughter and depilation, which uses a compressor to compress and heat water vapor. The heated water vapor enters a condenser to heat and disinfect the water used for slaughter and depilation. The heated and disinfected hot water flows back to a hot water pool to complete the disinfection procedure. The high-temperature disinfected water passes into a flash evaporator to cool down and then enters a water outlet pool. The secondary steam generated by the flash evaporation is pressurized by a compressor and used to heat and disinfect the water used for slaughter and depilation. The production process of heating, disinfection, cooling and reuse is repeated in this way.

[0006] The structure of the slaughter and depilation water disinfection equipment manufactured according to the above method is as follows:

[0007] The steam inlet and outlet of the compressor are connected to the flash evaporator and the condenser respectively;

[0008] The condenser is connected to the water inlet tank through a left circulation pump, the bottom of the condenser is connected to the hot water tank, and the hot water tank is connected to the upper part of the water inlet tank;

[0009] The flash evaporator is connected to the hot water pool via a right circulation pump, and the lower part of the flash evaporator is connected to the water outlet pool; a vacuum pump is provided on the top of the condenser.

[0010] Furthermore, a heat exchanger is provided, the cooling end of the heat exchanger being connected to the flash evaporator and the right circulation pump; the heating end of the heat exchanger being provided at the front end of the water inlet pool; the heat exchanger is provided to reduce the evaporation amount, reduce the load of the compressor, and further save energy consumption.

[0011] The beneficial effects of the present invention are:

[0012] 1) The compressor, condenser, flash evaporator and heat exchanger combination of the present invention is used to cool the hot water after disinfection, and the heat released provides a heat source for disinfecting the water used for depilation. This greatly reduces the energy consumption for disinfecting the water used for slaughter depilation, saves more than 60% of energy, has a significant energy-saving effect, and greatly reduces costs.

[0013] 2) The present invention heats water vapor at low cost to kill viruses in hot water, reducing potential safety hazards in meat products, preventing the transmission of bacteria and viruses infected by livestock to humans, reducing human infection with severe infectious diseases, and protecting global human health, with huge social benefits;

[0014] 3) Install a heat exchanger to reduce evaporation, reduce the load on the compressor, and further save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a water disinfection equipment for slaughter and dehairing.

[0016] Figure 2 This is a schematic diagram of a slaughter and dehairing water disinfection equipment after a heat exchanger is installed.

[0017] In the figure, P1 is the left circulation pump, P2 is the right circulation pump, P3 is the compressor, P4 is the vacuum pump, V1 is the water inlet pool, V2 is the hot water pool, V3 is the water outlet pool, L1 is the condenser, H1 is the heat exchanger, and Z1 is the flash evaporator. The arrows in the figure indicate the direction of water or steam flow, and the temperature marked in the figure is the reference temperature at that location. DETAILED DESCRIPTION

[0018] A method for disinfecting water used for slaughter and depilation, which uses a compressor to compress and heat water vapor. The heated water vapor enters a condenser to heat and disinfect the water used for slaughter and depilation. The heated and disinfected hot water flows back to a hot water pool to complete the disinfection procedure. The high-temperature disinfected water passes into a flash evaporator to cool down and then enters a water outlet pool. The secondary steam generated by the flash evaporation is pressurized by a compressor and used to heat and disinfect the water used for slaughter and depilation. The production process of heating, disinfection, cooling and reuse is repeated in this way.

[0019] Figure 1 This is a schematic diagram of a water disinfection equipment for slaughter and dehairing manufactured according to the above method. The steam inlet and outlet of the compressor are connected to the flash evaporator and condenser respectively. The condenser and the water inlet pool are connected through the left circulation pump. The bottom of the condenser is connected to the hot water pool, and the hot water pool is connected to the upper part of the water inlet pool. That is, when the hot water pool is full, it overflows and flows into the water inlet pool.

[0020] The flash evaporator is connected to the hot water pool through the right circulation pump, and the lower part of the flash evaporator is connected to the water outlet pool. At the top of the condenser, a vacuum pump is installed to remove non-condensable gases and establish a vacuum system.

[0021] Figure 2 This is a schematic diagram of a slaughter dehairing water disinfection equipment equipped with a heat exchanger. The cooling end of the heat exchanger is connected to the flash evaporator and the right circulation pump; the heating end of the heat exchanger is set at the front end of the water inlet pool to increase the temperature of the hot water entering the water inlet pool.

[0022] The working steps and specific water vapor reference temperature of the present invention are as follows: Figure 1 、 Figure 2 ;

[0023] 1. The hot water delivered from the production line is at a temperature of 62°C. After passing through heat exchanger H1, the temperature rises to 78°C.

[0024] 2. The hot water after the heat exchanger is sent to the water inlet tank V1, where it mixes with the 82°C hot water overflowing from the hot water tank V2, and the temperature reaches 80°C.

[0025] 3. Hot water with a temperature of 80°C is delivered to the top of condenser L1 by the left circulation pump P1. After entering condenser L1, it is heated by the 87°C saturated steam from compressor P3, raising the water temperature to 82°C and returning to the hot water tank V2.

[0026] 4. Part of the hot water in the hot water tank V2 overflows into the water inlet tank V1, and part of it is pumped by the right circulation pump P2 to the heat exchanger H1. After heat exchange, the temperature drops to 66°C;

[0027] 5. The cooled hot water at 66°C is fed into the flash evaporator Z1, where it undergoes vacuum flash evaporation, reducing the temperature to 62°C and returns to the outlet pool V3.

[0028] 6. After the steam generated in the flash evaporator is compressed by the compressor, the steam saturation temperature rises from 62°C to 87°C;

[0029] 7. Install a vacuum pump P4 on the top of condenser L1 to remove non-condensable gases and establish a vacuum system;

[0030] 8. The liquid level difference between the flash evaporator Z1 and the outlet tank V3 should be set to 2-12 meters, preferably 7-10 meters;

[0031] 9. The liquid level difference between condenser L1 and hot water tank V2 should be set to 2-12 meters, preferably 7-10 meters;

[0032] 10. The above nodes are the optimal control temperatures, and the temperature of each node can fluctuate within a certain range.

Claims

1. A method for disinfecting water for slaughter and depilation, comprising: using a compressor (P3) to compress and heat water vapor; the heated water vapor enters a condenser (L1) to heat and disinfect the water for slaughter and depilation; the heated and disinfected hot water flows back to a hot water tank (V2); the disinfected water is passed through a flash evaporator (Z1) to cool down, and then enters a water outlet tank (V3); the secondary steam generated by the flash evaporation is pressurized by a compressor (P3) and used to heat and disinfect the water for slaughter and depilation; and the production process of heating, disinfection, cooling and reuse is repeated in this manner; The equipment used in the method for disinfecting water for slaughter and depilation is as follows: the steam inlet and outlet of the compressor (P3) are connected to the flash evaporator (Z1) and the condenser (L1) respectively; the condenser (L1) and the water inlet pool (V1) are connected through the left circulation pump (P1), the bottom of the condenser (L1) is connected to the hot water pool (V2), and the hot water pool (V2) is connected to the upper part of the water inlet pool (V1); the flash evaporator (Z1) and the hot water pool are connected through the right circulation pump (P2), and the flash evaporator (Z1) is connected to the hot water pool. ) is connected to the outlet pool (V3); a vacuum pump (P4) is provided on the top of the condenser (L1); a heat exchanger (H1) is further provided below, the cooling end of the heat exchanger (H1) being connected to the flash evaporator (Z1) and the right circulation pump (P2); the heating end of the heat exchanger (H1) is provided at the front end of the water inlet pool (V1); the liquid level difference between the flash evaporator (Z1) and the outlet pool (V3) should be set to 2-12 meters; the liquid level difference between the condenser (L1) and the hot water pool (V2) should be set to 2-12 meters; The specific operation of the equipment used in the method for disinfecting water for slaughtering and depilating comprises the following steps: 1) The hot water delivered from the production line is at a temperature of 62°C. After passing through the heat exchanger (H1), the temperature rises to 78°C. 2) Hot water at a temperature of 78°C is fed into the inlet pool (V1) and mixed with the 82°C hot water overflowing from the hot water pool (V2), bringing the temperature to 80°C. 3) 80℃ hot water is delivered to the top of the condenser (L1) by the left circulation pump (P1), enters the condenser (L1), and is heated by the 87℃ saturated steam from the compressor (P3). The water temperature rises to 82℃ and returns to the hot water pool (V2); 4) Part of the hot water in the hot water tank (V2) overflows into the water inlet tank (V1), and part of it is pumped to the heat exchanger (H1) by the right circulation pump (P2). After heat exchange, the temperature drops to 66°C; 5) The cooled hot water at 66°C is sent to the flash evaporator (Z1), where it undergoes vacuum flash evaporation to reduce the temperature to 62°C and then returns to the outlet pool (V3); 6) The steam generated in the flash evaporator (Z1) is compressed by the compressor (P3), and the steam saturation temperature rises from 62°C to 87°C, and enters the condenser (L1).

Images